Fix (Mesh): Non-planar quad mesh support

For "Revit2022",
sourceHostApp: "revit"
sourceHostAppVersion: "Revit2022"

.circleci/config.yml

@@ -36,19 +36,41 @@ jobs:
       - attach_workspace:
           at: ./
       - run:
-          name: Patch
+          name: Create Innosetup signing cert
           shell: powershell.exe
-          command:
-            | # If no tag, use 0.0.0.1 and don't make any YML (for testing only!)
-            $tag = if([string]::IsNullOrEmpty($env:CIRCLE_TAG)) { "0.0.0" } else { $env:CIRCLE_TAG }
-            $semver = if($tag.Contains('/')) {$tag.Split("/")[1] } else { $tag }
+          command: |
+            echo $env:PFX_B64 > "speckle-sharp-ci-tools\SignTool\AEC Systems Ltd.txt"
+            certutil -decode "speckle-sharp-ci-tools\SignTool\AEC Systems Ltd.txt" "speckle-sharp-ci-tools\SignTool\AEC Systems Ltd.pfx"
+      - run:
+          name: Set Environment Variable
+          shell: powershell.exe
+          command: |
+            $tag = if([string]::IsNullOrEmpty($env:CIRCLE_TAG)) { "2.0.999" } else { $env:CIRCLE_TAG }
+            $semver = if($tag.Contains('/')) {$tag.Split("/")[0] } else { $tag }
             $ver = if($semver.Contains('-')) {$semver.Split("-")[0] } else { $semver }
-            $channel = if($semver.Contains('-')) {$semver.Split("-")[1] } else { "latest" }
-            $version = "$($ver).$($env:CIRCLE_BUILD_NUM)"
-            New-Item -Force "speckle-sharp-ci-tools/Installers/sketchup/$channel.yml" -ItemType File -Value "version: $semver"
-            echo $version
+            $version = "$($ver).$($env:WORKFLOW_NUM)"
             python patch_version.py $semver
-            speckle-sharp-ci-tools\InnoSetup\ISCC.exe speckle-sharp-ci-tools\sketchup.iss
+          environment:
+            WORKFLOW_NUM: << pipeline.number >>
+      - run:
+          name: Build Installer
+          command: speckle-sharp-ci-tools\InnoSetup\ISCC.exe speckle-sharp-ci-tools\sketchup.iss /Sbyparam=$p
+          shell: cmd.exe #does not work in powershell
+
+      #- run:
+      #    name: Patch
+      #    shell: powershell.exe
+      #    command:
+      #      | # If no tag, use 0.0.0.1 and don't make any YML (for testing only!)
+      #      $tag = if([string]::IsNullOrEmpty($env:CIRCLE_TAG)) { "0.0.0" } else { $env:CIRCLE_TAG }
+      #      $semver = if($tag.Contains('/')) {$tag.Split("/")[1] } else { $tag }
+      #      $ver = if($semver.Contains('-')) {$semver.Split("-")[0] } else { $semver }
+      #      $channel = if($semver.Contains('-')) {$semver.Split("-")[1] } else { "latest" }
+      #      $version = "$($ver).$($env:CIRCLE_BUILD_NUM)"
+      #      New-Item -Force "speckle-sharp-ci-tools/Installers/sketchup/$channel.yml" -ItemType File -Value "version: $semver"
+      #      echo $version
+      #      python patch_version.py $semver
+      #      speckle-sharp-ci-tools\InnoSetup\ISCC.exe speckle-sharp-ci-tools\sketchup.iss
       - persist_to_workspace:
           root: ./
           paths:
@@ -58,9 +80,17 @@ jobs:
     docker:
       - image: cimg/base:2021.01
     steps:
+      - add_ssh_keys:
+          fingerprints:
+            - "03:2e:ee:4f:14:67:2b:88:32:e8:cc:f0:cb:df:92:29"
+      - run:
+          name: I know Github as a host
+          command: |
+            mkdir ~/.ssh
+            ssh-keyscan github.com >> ~/.ssh/known_hosts
       - run:
           name: Clone
-          command: git clone https://$GITHUB_TOKEN@github.com/specklesystems/speckle-sharp-ci-tools.git speckle-sharp-ci-tools
+          command: git clone git@github.com:specklesystems/speckle-sharp-ci-tools.git speckle-sharp-ci-tools
       - persist_to_workspace:
           root: ./
           paths:
@@ -114,8 +144,10 @@ workflows:
           filters:
             tags:
               only: /.*/
+          context: innosetup
 
       - deploy-manager2:
+          context: do-spaces-speckle-releases
           slug: sketchup
           os: Win
           extension: exe

speckle_connector/src/actions/activate_diffing.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'deactivate_diffing'
+
+module SpeckleConnector
+  module Actions
+    # Deactivate diffing for stream.
+    class ActivateDiffing < Action
+      def initialize(stream_id)
+        super()
+        @stream_id = stream_id
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def update_state(state)
+        state = DeactivateDiffing.update_state(state, {})
+        puts "Diffing activated for #{@stream_id}"
+        speckle_entities = state.speckle_state.speckle_entities
+        invalid_speckle_entities = speckle_entities.select do |_id, entity|
+          entity.invalid_stream_ids.include?(@stream_id) && entity.sketchup_entity.is_a?(Sketchup::Face)
+        end
+        invalid_speckle_entities.each do |id, entity|
+          new_entity = entity.activate_diffing(@stream_id, state.sketchup_state.materials.by_id(MAT_EDIT))
+          speckle_entities = speckle_entities.put(id, new_entity)
+        end
+        new_speckle_state = state.speckle_state.with_speckle_entities(speckle_entities)
+        state.with_speckle_state(new_speckle_state)
+      end
+    end
+  end
+end

speckle_connector/src/actions/add_material.rb

@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+
+module SpeckleConnector
+  module Actions
+    # Adds material to speckle state and Sketchup.
+    class AddMaterial < Action
+      def self.update_state(state, material_name:, color:, material_id:, alpha: nil)
+        materials = state.sketchup_state.materials
+        existing_material = materials.by_id(material_id)
+        return state if existing_material&.valid?
+
+        new_material = create_or_get_material(state.sketchup_state.sketchup_model,
+                                              material_name,
+                                              color,
+                                              material_id,
+                                              alpha: alpha)
+        new_materials = materials.add_material(material_id, new_material)
+        new_sketchup_state = state.sketchup_state.with(:@materials => new_materials)
+        state.with(:@sketchup_state => new_sketchup_state)
+      end
+
+      def self.create_or_get_material(model, material_name, color, material_id, alpha: nil)
+        materials = model.materials
+        existing_material = materials.find { |mat| mat.name == material_name }
+        return existing_material if existing_material&.valid?
+
+        existing_material = materials.add material_name
+        existing_material.set_attribute(MAT_DICTIONARY, MAT_ID, material_id.to_s)
+        set_hex_color(existing_material, color)
+        existing_material.alpha = alpha if alpha
+        existing_material
+      end
+
+      def self.set_hex_color(skp_material, hex_value)
+        hex_value = hex_value.to_s
+        col_blue, col_green, col_red = parse_hex_color(hex_value)
+        skp_material.color = col_red, col_green, col_blue
+      end
+
+      def self.parse_hex_color(hex_value)
+        split_values = hex_value.match(/^#([a-fA-F\d]{2})([a-fA-F\d]{2})([a-fA-F\d]{2})$/) ||
+                       hex_value.match(/^#([a-fA-F\d])([a-fA-F\d])([a-fA-F\d])$/)
+        col_red = split_values[1].hex
+        col_green = split_values[2].hex
+        col_blue = split_values[3].hex
+        return col_blue, col_green, col_red
+      end
+    end
+  end
+end

speckle_connector/src/actions/collect_preferences.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../ext/sqlite3'
+require_relative '../constants/path_constants'
+
+module SpeckleConnector
+  module Actions
+    # Action to collect preferences from database to UI.
+    class CollectPreferences < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data)
+        state.with_add_queue('collectPreferences', state.user_state.preferences.to_json, [])
+      end
+    end
+  end
+end

speckle_connector/src/actions/collect_versions.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+
+module SpeckleConnector
+  module Actions
+    # Action to collect versions from sketchup and connector to track user's version by mixpanel.
+    class CollectVersions < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data)
+        versions = {
+          sketchup: Sketchup.version.to_i,
+          speckle: SpeckleConnector::CONNECTOR_VERSION
+        }
+        state.with_add_queue('collectVersions', versions.to_json, [])
+      end
+    end
+  end
+end

speckle_connector/src/actions/deactivate_diffing.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+
+module SpeckleConnector
+  module Actions
+    # Deactivate diffing.
+    class DeactivateDiffing < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state, _data)
+        puts 'Diffing deactivated!'
+        speckle_entities = state.speckle_state.speckle_entities
+        diffing_activated_speckle_entities = speckle_entities.reject do |_id, entity|
+          entity.active_diffing_stream_id.nil?
+        end
+        diffing_activated_speckle_entities.each do |id, entity|
+          new_entity = entity.deactivate_diffing
+          speckle_entities = speckle_entities.put(id, new_entity)
+        end
+        new_speckle_state = state.speckle_state.with_speckle_entities(speckle_entities)
+        state.with_speckle_state(new_speckle_state)
+      end
+    end
+  end
+end

speckle_connector/src/actions/events/app_event_action.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+require_relative 'event_action'
+require_relative '../load_sketchup_model'
+require_relative '../collect_preferences'
+
+module SpeckleConnector
+  module Actions
+    module Events
+      # Handle events that are triggered by the {AppObserver}.
+      class AppEventAction < EventAction
+        # Handle loading new or existing model
+        class OnNewOrChangedModel
+          # Handle events when the new or existing model is loaded in Sketchup
+          # @param state [States::State] the current state of speckle application
+          # @param event_data [Array<(Sketchup::Model)>] the event data for the given event. It consists of
+          #  a double array with a single element that is the {Sketchup::Model} object of the loaded model.
+          def self.update_state(state, event_data)
+            return state unless event_data&.any?
+
+            model = event_data.flatten.first
+            # LoadSketchupModel action should be responsible to update all model specific data for state and then
+            #  should notify the UI to update it's components.
+            new_state = Actions::LoadSketchupModel.update_state(state, model)
+            # Action to let UI to render itself with new preferences state
+            # TODO: Later UI should be updated if any stream is invalid after
+            #  we collected speckle_entities appropriately
+            CollectPreferences.update_state(new_state, {})
+          end
+        end
+
+        # Run actions that are needed before the sketchup quits
+        class OnQuit
+          # Handle when Sketchup application closes
+          # @param state [States::State] the current state of speckle application
+          # @param _event_data [Array] the event data
+          # @return [States::State] the transformed state object
+          def self.update_state(state, _event_data)
+            state
+          end
+        end
+
+        # Handlers that are used to handle specific events
+        ACTIONS = {
+          onNewModel: OnNewOrChangedModel,
+          onOpenModel: OnNewOrChangedModel,
+          onQuit: OnQuit
+        }.freeze
+
+        def self.actions
+          ACTIONS
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/events/entities_event_action.rb

@@ -0,0 +1,84 @@
+# frozen_string_literal: true
+
+require_relative 'event_action'
+require_relative '../../sketchup_model/utils/face_utils'
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  module Actions
+    module Events
+      # Event actions related to entities.
+      class EntitiesEventAction < EventAction
+        # Event action when element added.
+        class OnElementAdded
+          # @param state [States::State] the current state of the SpeckleConnector Application
+          def self.update_state(state, event_data)
+            modified_entities = event_data.to_a.collect { |e| e[1] }
+            # do not copy speckle base object specific attributes, because they are entity specific
+            modified_entities.each { |entity| entity.delete_attribute(SPECKLE_BASE_OBJECT) }
+            state
+          end
+        end
+
+        # Event action when element modified.
+        class OnElementModified
+          # @param state [States::State] the current state of the SpeckleConnector Application
+          def self.update_state(state, event_data)
+            speckle_state = state.speckle_state
+            modified_entity = event_data[0][1]
+            if modified_entity.is_a?(Sketchup::Face)
+              path = state.sketchup_state.sketchup_model.active_path
+              modified_faces = SketchupModel::Utils::FaceUtils.near_faces(modified_entity.edges)
+              path_objects = path.nil? ? [] : path + path.collect(&:definition)
+              parent_ids = path_objects.collect(&:persistent_id)
+              ids_to_invalidate = modified_faces.collect(&:persistent_id) + parent_ids
+              entities_to_invalidate = speckle_entities_to_invalidate(speckle_state, ids_to_invalidate)
+              new_speckle_state = invalidate_speckle_entities(speckle_state, entities_to_invalidate)
+              # This is the place we can send information to UI for diffing check
+              diffing = state.user_state.preferences[:user][:diffing]
+              new_speckle_state = new_speckle_state.with_invalid_streams_queue if diffing
+              return state.with_speckle_state(new_speckle_state)
+            end
+
+            state
+          end
+
+          # @param speckle_state [States::SpeckleState] the current state of the Speckle
+          def self.speckle_entities_to_invalidate(speckle_state, ids)
+            speckle_state.speckle_entities.to_h.select { |id, _| ids.include?(id) }
+          end
+
+          # @param speckle_state [States::SpeckleState] the current state of the Speckle
+          def self.invalidate_speckle_entities(speckle_state, entities_to_invalidate)
+            speckle_entities = speckle_state.speckle_entities
+            entities_to_invalidate.each do |id, speckle_entity|
+              edited_speckle_entity = speckle_entity.with_invalid
+              speckle_entities = speckle_entities.put(id, edited_speckle_entity)
+            end
+            speckle_state.with_speckle_entities(speckle_entities)
+          end
+        end
+
+        # Event action when element removed.
+        class OnElementRemoved
+          # @param state [States::State] the current state of the SpeckleConnector Application
+          def self.update_state(state, _event_data)
+            # TODO: Do state updates when element removed
+            state
+          end
+        end
+
+        # Handlers that are used to handle specific events
+        ACTIONS = {
+          onElementRemoved: OnElementRemoved,
+          onElementAdded: OnElementAdded,
+          onElementModified: OnElementModified
+        }.freeze
+
+        def self.actions
+          ACTIONS
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/events/event_action.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module Actions
+    # This module contains actions that are performed to handle events triggered by observers in Sketchup.
+    module Events
+      # Base action for Handling events
+      class EventAction
+        def self.actions
+          raise NoMethodError, 'Implement in a subclass'
+        end
+
+        # Handle the events that were collected by the observer. In case of the selection observer,
+        # we only need to handle the events once if any of the events actually happened.
+        # @param state [States::State] the current state of the SpeckleConnector Application
+        # @param events [Hash{Symbol=>Array}] the event data grouped by the event name
+        # @return [States::State] the transformed state
+        def self.update_state(state, events)
+          # Don't do anything if there are no events for this action
+          return state unless events
+
+          actions = self.actions
+          actions.each do |event_name, action|
+            next unless events.key?(event_name)
+
+            event_data = events[event_name]
+            state = action.update_state(state, event_data)
+          end
+          state
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/events/model_event_action.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require_relative 'event_action'
+require_relative '../load_sketchup_model'
+
+module SpeckleConnector
+  module Actions
+    module Events
+      # Handle events that are triggered by the {ModelObserver}.
+      class ModelEventAction < EventAction
+        # Handle loading new or existing model
+        class OnActivePathChanged
+          # Handle events when the new or existing model is loaded in Sketchup
+          # @param state [States::State] the current state of speckle application
+          # @param event_data [Array<(Sketchup::Model)>] the event data for the given event. It consists of
+          #  a double array with a single element that is the {Sketchup::Model} object of the loaded model.
+          def self.update_state(state, _event_data)
+            sketchup_state = state.sketchup_state
+            active_path = sketchup_state.sketchup_model.active_path
+            observers = state.speckle_state.observers
+            update_object_observers(active_path, observers)
+            return state
+          end
+
+          def self.update_object_observers(path, observers)
+            path[-1].definition.entities.add_observer(observers[ENTITIES_OBSERVER]) unless path.nil?
+          end
+        end
+
+        # Handlers that are used to handle specific events
+        ACTIONS = {
+          onActivePathChanged: OnActivePathChanged
+        }.freeze
+
+        def self.actions
+          ACTIONS
+        end
+      end
+    end
+  end
+end

speckle_connector/src/actions/init_local_accounts.rb

@@ -12,8 +12,8 @@ module SpeckleConnector
       # @return [States::State] the new updated state object
       def self.update_state(state, _data)
         puts 'Initialisation of Speckle accounts requested by plugin'
-        accounts_data = Accounts.load_accounts.to_json
-        state.with_add_queue('loadAccounts', accounts_data, [])
+        accounts_data = state.speckle_state.accounts
+        state.with_add_queue('loadAccounts', accounts_data.to_json, [])
       end
     end
   end

speckle_connector/src/actions/initialize_materials.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'add_material'
+require_relative '../constants/mat_constants'
+
+module SpeckleConnector
+  module Actions
+    # Action to initialize materials
+    class InitializeMaterials < Action
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def self.update_state(state)
+        new_state = recreate_material(state, DEFAULT_NAMES[MAT_ADD], DEFAULT_COLORS[MAT_ADD], MAT_ADD)
+        new_state = recreate_material(new_state, DEFAULT_NAMES[MAT_EDIT], DEFAULT_COLORS[MAT_EDIT], MAT_EDIT)
+        recreate_material(new_state, DEFAULT_NAMES[MAT_REMOVE], DEFAULT_COLORS[MAT_REMOVE], MAT_REMOVE)
+      end
+
+      def self.recreate_material(state, name, color, id, alpha: nil)
+        Actions::AddMaterial.update_state(
+          state,
+          material_name: name,
+          color: color,
+          material_id: id,
+          alpha: alpha
+        )
+      end
+    end
+  end
+end

speckle_connector/src/actions/initialize_speckle.rb

@@ -5,6 +5,8 @@ require_relative '../states/state'
 require_relative '../states/speckle_state'
 require_relative '../states/sketchup_state'
 require_relative '../accounts/accounts'
+require_relative '../preferences/preferences'
+require_relative '../constants/observer_constants'
 
 module SpeckleConnector
   module Actions
@@ -12,12 +14,20 @@ module SpeckleConnector
     class InitializeSpeckle < Action
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
-      def self.update_state(state)
-        accounts = SpeckleConnector::Accounts.load_accounts.to_json
-        speckle_state = States::SpeckleState.new(accounts, {}, {})
+      def self.update_state(state, observers)
+        attach_app_observer!(observers[APP_OBSERVER])
+        accounts = SpeckleConnector::Accounts.load_accounts
+        speckle_state = States::SpeckleState.new(accounts, observers, {}, {})
         # This should be the only point that `Sketchup_active_model` passed to application state.
         sketchup_state = States::SketchupState.new(Sketchup.active_model)
-        States::State.new(state.user_state, speckle_state, sketchup_state, false)
+        preferences = Preferences.read_preferences(sketchup_state.sketchup_model)
+        user_state_with_preferences = state.user_state.with_preferences(preferences)
+        state = States::State.new(user_state_with_preferences, speckle_state, sketchup_state, false)
+        Actions::LoadSketchupModel.update_state(state, sketchup_state.sketchup_model)
+      end
+
+      def self.attach_app_observer!(observer)
+        Sketchup.add_observer(observer)
       end
     end
   end

speckle_connector/src/actions/load_saved_streams.rb

@@ -9,7 +9,8 @@ module SpeckleConnector
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
       def self.update_state(state, _data)
-        (saved_streams = state.sketchup_state.sketchup_model.attribute_dictionary('speckle', true)['streams']) or []
+        (saved_streams = state.sketchup_state.sketchup_model
+                              .attribute_dictionary('Speckle', true)['saved_streams']) or []
         state.with_add_queue('setSavedStreams', saved_streams, [])
       end
     end

speckle_connector/src/actions/load_sketchup_model.rb

@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'initialize_materials'
+require_relative '../sketchup_model/reader/speckle_entities_reader'
+require_relative '../preferences/preferences'
+require_relative '../states/state'
+require_relative '../states/sketchup_state'
+require_relative '../constants/observer_constants'
+
+module SpeckleConnector
+  module Actions
+    # Switch sketchup model wit a new one
+    class LoadSketchupModel < Action
+      # Replace current model state with the state of a new model. This action is triggered when user opens new or
+      # existing Sketchup model.
+      # @param state [States::State] the current state of Speckle
+      # @param additional_parameters [Array] parameters that the action takes
+      # @return [States::State] the new updated state object
+      def self.update_state(state, sketchup_model)
+        # Init sketchup state again with new model
+        new_sketchup_state = States::SketchupState.new(sketchup_model)
+        sketchup_model.rendering_options['DisplaySectionPlanes'] = true
+        new_state = state.with(:@sketchup_state => new_sketchup_state)
+        # Init materials again
+        new_state = InitializeMaterials.update_state(new_state)
+
+        # Read speckle entities
+        new_speckle_entities = SketchupModel::Reader::SpeckleEntitiesReader.read(sketchup_model.entities)
+        new_speckle_state = new_state.speckle_state.with_speckle_entities(Immutable::Hash.new(new_speckle_entities))
+        new_state = new_state.with_speckle_state(new_speckle_state)
+
+        # Read preferences from database and model.
+        preferences = Preferences.read_preferences(new_state.sketchup_state.sketchup_model)
+        new_user_state = new_state.user_state.with_preferences(preferences)
+        new_state = new_state.with(:@user_state => new_user_state)
+        attach_observers(sketchup_model, new_state.speckle_state.observers)
+        new_state
+      end
+
+      # Attach observers to the sketchup model
+      # @param sketchup_model [Sketchup::Model] the model to attach observers to
+      # @param observers [Hash{Class=>}] the observer objects indexed by their class that will be attached
+      def self.attach_observers(sketchup_model, observers)
+        # selection = sketchup_model.selection
+        # selection.add_observer(observers[SELECTION_OBSERVER_NAME])
+        # layers = sketchup_model.layers
+        # layers.add_observer(observers[LAYERS_OBSERVER_NAME])
+        entities = sketchup_model.entities
+        entities.add_observer(observers[ENTITIES_OBSERVER])
+        sketchup_model.add_observer(observers[MODEL_OBSERVER])
+        # materials = sketchup_model.materials
+        # materials.add_observer(observers[MATERIALS_OBSERVER_NAME])
+        # pages = sketchup_model.pages
+        # pages.add_observer(observers[PAGES_OBSERVER_NAME])
+      end
+    end
+  end
+end

speckle_connector/src/actions/model_preference_updated.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../ext/sqlite3'
+require_relative '../accounts/accounts'
+require_relative '../constants/path_constants'
+require_relative '../sketchup_model/dictionary/speckle_model_dictionary_handler'
+
+module SpeckleConnector
+  module Actions
+    # When preference updated by UI.
+    class ModelPreferencesUpdated < Action
+      def initialize(pref, value)
+        super()
+        @preference = pref
+        @value = value
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      def update_state(state)
+        model = state.user_state.preferences[:model].dup
+        model[@preference.to_sym] = @value
+        new_preferences = state.user_state.preferences.put(:model, model)
+        SketchupModel::Dictionary::SpeckleModelDictionaryHandler.set_attribute(
+          state.sketchup_state.sketchup_model,
+          @preference.to_sym,
+          @value,
+          'Speckle'
+        )
+        new_user_state = state.user_state.with_preferences(new_preferences)
+        state.with_user_state(new_user_state)
+      end
+    end
+  end
+end

speckle_connector/src/actions/on_events_action.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative 'events/app_event_action'
+require_relative 'events/entities_event_action'
+require_relative 'events/model_event_action'
+require_relative '../constants/observer_constants'
+
+module SpeckleConnector
+  module Actions
+    # Handle events that were collected by observers
+    class OnEventsAction < Action
+      RUN_ORDER = {
+        APP_OBSERVER => Events::AppEventAction,
+        ENTITIES_OBSERVER => Events::EntitiesEventAction,
+        MODEL_OBSERVER => Events::ModelEventAction
+        # MATERIALS_OBSERVER => Events::MaterialsEventAction,
+        # LAYERS_OBSERVER => Events::LayerEventAction,
+        # PAGES_OBSERVER => Events::PagesEventAction,
+        # SELECTION_OBSERVER => Events::SelectionEventAction
+      }.freeze
+
+      def self.update_state(state, events)
+        RUN_ORDER.each do |observer_name, action|
+          next unless events.key?(observer_name)
+
+          parameters = events[observer_name]
+          state = action.update_state(state, parameters)
+        end
+        state
+      end
+    end
+  end
+end

speckle_connector/src/actions/receive_objects.rb

@@ -8,24 +8,28 @@ module SpeckleConnector
   module Actions
     # Action to receive objects from Speckle Server.
     class ReceiveObjects < Action
-      def initialize(stream_id, base, stream_name, branch_name, branch_id)
+      # rubocop:disable Metrics/ParameterLists
+      def initialize(stream_id, base, stream_name, branch_name, branch_id, source_app)
         super()
         @stream_id = stream_id
         @base = base
         @stream_name = stream_name
         @branch_name = branch_name
         @branch_id = branch_id
+        @source_app = source_app
       end
+      # rubocop:enable Metrics/ParameterLists
 
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
       def update_state(state)
-        converter = Converters::ToNative.new(state.sketchup_state.sketchup_model)
+        converter = Converters::ToNative.new(state, @stream_id, @stream_name, @branch_name, @source_app)
         # Have side effects on the sketchup model. It effects directly on the entities by adding new objects.
         start_time = Time.now.to_f
-        converter.receive_commit_object(@base)
+        state = converter.receive_commit_object(@base)
         elapsed_time = (Time.now.to_f - start_time).round(3)
         puts "==== Converting to Native executed in #{elapsed_time} sec ===="
+        puts "==== Source application is #{@source_app}. ===="
         state.with_add_queue('finishedReceiveInSketchup', @stream_id, [])
       end
     end

speckle_connector/src/actions/reload_accounts.rb

@@ -12,8 +12,10 @@ module SpeckleConnector
       # @return [States::State] the new updated state object
       def self.update_state(state, _data)
         puts 'Reload of Speckle accounts requested by plugin'
-        accounts_data = Accounts.load_accounts.to_json
-        state.with_add_queue('loadAccounts', accounts_data, [])
+        new_speckle_state = state.speckle_state.with_accounts(Accounts.load_accounts)
+        state = state.with_speckle_state(new_speckle_state)
+        accounts_data = state.speckle_state.accounts
+        state.with_add_queue('loadAccounts', accounts_data.to_json, [])
       end
     end
   end

speckle_connector/src/actions/remove_stream.rb

@@ -18,10 +18,10 @@ module SpeckleConnector
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
       def update_state(state)
-        speckle_dict = state.sketchup_state.sketchup_model.attribute_dictionary('speckle', true)
-        saved = speckle_dict['streams'] || []
+        speckle_dict = state.sketchup_state.sketchup_model.attribute_dictionary('Speckle', true)
+        saved = speckle_dict['saved_streams'] || []
         saved -= [@stream_id]
-        speckle_dict['streams'] = saved
+        speckle_dict['saved_streams'] = saved
         state
       end
     end

speckle_connector/src/actions/save_stream.rb

@@ -16,10 +16,10 @@ module SpeckleConnector
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
       def update_state(state)
-        speckle_dict = state.sketchup_state.sketchup_model.attribute_dictionary('speckle', true)
-        saved = speckle_dict['streams'] || []
+        speckle_dict = state.sketchup_state.sketchup_model.attribute_dictionary('Speckle', true)
+        saved = speckle_dict['saved_streams'] || []
         saved = saved.empty? ? [@stream_id] : saved.unshift(@stream_id)
-        speckle_dict['streams'] = saved
+        speckle_dict['saved_streams'] = saved
         state
       end
     end

speckle_connector/src/actions/send_from_queue.rb

@@ -16,11 +16,10 @@ module SpeckleConnector
       # @return [States::State] the new updated state object
       def update_state(state)
         to_send_stream_id = state.speckle_state.stream_queue[:stream_id]
-        return state if to_send_stream_id == @stream_id
+        return state if to_send_stream_id == @stream_id || to_send_stream_id.nil?
 
         to_send_converted = state.speckle_state.stream_queue[:converted].to_json
         new_state = state.with_add_queue('convertedFromSketchup', to_send_stream_id, [to_send_converted])
-        new_state = new_state.with_add_queue('oneClickSend', to_send_stream_id, [])
         new_state.with_empty_stream_queue
       end
     end

speckle_connector/src/actions/send_selection.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require_relative 'action'
+require_relative 'deactivate_diffing'
 require_relative '../convertors/units'
 require_relative '../convertors/to_speckle'
 
@@ -16,16 +17,23 @@ module SpeckleConnector
       # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
       # @return [States::State] the new updated state object
       def update_state(state)
-        sketchup_model = state.sketchup_state.sketchup_model
-        converter = Converters::ToSpeckle.new(sketchup_model)
-        base = converter.convert_selection_to_base
-        id, total_children_count, batches = converter.send_info(base)
+        state = DeactivateDiffing.update_state(state, {})
+        converter = Converters::ToSpeckle.new(state, @stream_id)
+        new_speckle_state, base = converter.convert_selection_to_base(state.user_state.preferences)
+        id, total_children_count, batches, new_speckle_state = converter.serialize(base, new_speckle_state,
+                                                                                   state.user_state.preferences)
         puts("converted #{base.count} objects for stream #{@stream_id}")
-        state.with_add_queue('convertedFromSketchup', @stream_id, [
-                               { is_string: false, val: batches },
-                               { is_string: true, val: id },
-                               { is_string: false, val: total_children_count }
-                             ])
+
+        # This is the place we can send information to UI for diffing check
+        diffing = state.user_state.preferences[:user][:diffing]
+        new_speckle_state = new_speckle_state.with_invalid_streams_queue if diffing
+
+        new_state = state.with_speckle_state(new_speckle_state)
+        new_state.with_add_queue('convertedFromSketchup', @stream_id, [
+                                   { is_string: false, val: batches },
+                                   { is_string: true, val: id },
+                                   { is_string: false, val: total_children_count }
+                                 ])
       end
     end
   end

speckle_connector/src/actions/user_preferences_updated.rb

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+require_relative 'action'
+require_relative '../ext/sqlite3'
+require_relative '../accounts/accounts'
+require_relative '../constants/path_constants'
+
+module SpeckleConnector
+  module Actions
+    # When preference updated by UI.
+    class UserPreferencesUpdated < Action
+      def initialize(pref_hash, pref, value)
+        super()
+        @preference_hash = pref_hash
+        @preference = pref
+        @value = value
+      end
+
+      # @param state [States::State] the current state of the {App::SpeckleConnectorApp}
+      # @return [States::State] the new updated state object
+      # rubocop:disable Metrics/AbcSize
+      # rubocop:disable Metrics/MethodLength
+      def update_state(state)
+        # Init sqlite database
+        db = Sqlite3::Database.new(SPECKLE_CONFIG_DB_PATH)
+
+        # Select data
+        data = db.exec("SELECT content FROM 'objects' WHERE hash = '#{@preference_hash}'").first.first
+
+        # Parse string to hash
+        data_hash = JSON.parse(data).to_h
+
+        # Get current preference value
+        old_preference_value = data_hash[@preference]
+
+        # Return old state if it is equal to new one
+        return state if @value == old_preference_value
+
+        data_hash[@preference] = @value
+
+        # Update entry unless equal old to new
+        db.exec("UPDATE 'objects' SET content = '#{data_hash.to_json}' WHERE hash = '#{@preference_hash}'")
+
+        # Close db when process done
+        db.close
+
+        user = state.user_state.preferences[:user].dup
+        user[@preference.to_sym] = @value
+        new_preferences = state.user_state.preferences.put(:user, user)
+        new_user_state = state.user_state.with_preferences(new_preferences)
+        # This is the place we can send information to UI for diffing check. It is a technical depth!
+        if @preference == 'diffing'
+          new_speckle_state = if @value
+                                state.speckle_state.with_invalid_streams_queue
+                              else
+                                state.speckle_state.with_empty_invalid_streams_queue
+                              end
+          state = state.with_speckle_state(new_speckle_state)
+        end
+        state.with_user_state(new_user_state)
+      end
+      # rubocop:enable Metrics/AbcSize
+      # rubocop:enable Metrics/MethodLength
+    end
+  end
+end

speckle_connector/src/app/speckle_connector_app.rb

@@ -15,6 +15,9 @@ module SpeckleConnector
       # @return [Ui::UiController] controller for ui views
       attr_reader :ui_controller
 
+      # @return [Observers::Handler] the observers indexed by their classes to handle
+      attr_reader :observer_handler
+
       def initialize(menu_commands, state, ui_controller)
         @menu_commands = menu_commands
         @state = state
@@ -35,6 +38,10 @@ module SpeckleConnector
         update_state!(Actions::ClearQueue)
       end
 
+      def add_observer_handler!(observer_handler)
+        @observer_handler = observer_handler
+      end
+
       def update_state!(action, *parameters)
         old_state = @state
         @state = action.update_state(old_state, *parameters)

speckle_connector/src/commands/activate_diffing.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../actions/activate_diffing'
+
+module SpeckleConnector
+  module Commands
+    # Command to activate diffing for stream.
+    class ActivateDiffing < Command
+      def _run(data)
+        stream_id = data['stream_id']
+        action = Actions::ActivateDiffing.new(stream_id)
+        app.update_state!(action)
+      end
+    end
+  end
+end

speckle_connector/src/commands/command.rb

@@ -18,11 +18,22 @@ module SpeckleConnector
 
       def run(*parameters)
         # Run here common operations that same for each command.
-        _run(*parameters)
+        with_observers_disabled do
+          _run(*parameters)
+        end
       end
 
       private
 
+      def with_observers_disabled(&block)
+        observer_handler = @app.observer_handler
+        if observer_handler
+          observer_handler.with_observers_disabled(&block)
+        else
+          block.call
+        end
+      end
+
       def _run(*_parameters)
         raise NotImplementedError, 'Implement in subclass'
       end

speckle_connector/src/commands/initialize_speckle.rb

@@ -4,6 +4,7 @@ require_relative 'command'
 require_relative '../states/initial_state'
 require_relative '../ui/vue_view'
 require_relative '../actions/initialize_speckle'
+require_relative '../observers/factory'
 
 module SpeckleConnector
   module Commands
@@ -30,7 +31,10 @@ module SpeckleConnector
       # Do the actual Speckle initialization.
       def initialize_speckle(app)
         # TODO: Initialize here speckle states and observers.
-        app.update_state!(Actions::InitializeSpeckle)
+        observer_handler = Observers::Factory.create_handler(app)
+        app.add_observer_handler!(observer_handler)
+        observers = Observers::Factory.create_observers(observer_handler)
+        app.update_state!(Actions::InitializeSpeckle, observers)
         dialog_specs = {
           dialog_id: Ui::SPECKLE_UI_ID,
           htm_file: Ui::VUE_UI_HTML,

speckle_connector/src/commands/model_preferences_updated.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../accounts/accounts'
+require_relative '../actions/model_preference_updated'
+
+module SpeckleConnector
+  module Commands
+    # Command to update theme.
+    class ModelPreferencesUpdated < Command
+      def _run(data)
+        preference = data['preference']
+        new_value = data['value']
+        app.update_state!(Actions::ModelPreferencesUpdated.new(preference, new_value))
+      end
+    end
+  end
+end

speckle_connector/src/commands/receive_objects.rb

@@ -13,7 +13,8 @@ module SpeckleConnector
         branch_name = data['branch_name']
         branch_id = data['branch_id']
         stream_name = data['stream_name']
-        action = Actions::ReceiveObjects.new(stream_id, base, stream_name, branch_name, branch_id)
+        source_app = data['source_app']
+        action = Actions::ReceiveObjects.new(stream_id, base, stream_name, branch_name, branch_id, source_app)
         app.update_state!(action)
       end
     end

speckle_connector/src/commands/user_preferences_updated.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require_relative 'command'
+require_relative '../accounts/accounts'
+require_relative '../actions/user_preferences_updated'
+
+module SpeckleConnector
+  module Commands
+    # Command to update preferences.
+    class UserPreferencesUpdated < Command
+      def _run(data)
+        preference_hash = data['preference_hash']
+        preference = data['preference']
+        new_value = data['value']
+        app.update_state!(Actions::UserPreferencesUpdated.new(preference_hash, preference, new_value))
+      end
+    end
+  end
+end

speckle_connector/src/constants/dict_constants.rb

@@ -1,8 +1,13 @@
 # frozen_string_literal: true
 
 module SpeckleConnector
+  SPECKLE_BASE_OBJECT = 'Speckle_Base_Object'
   SPECKLE_ID = 'speckle_id'
   SPECKLE_TYPE = 'speckle_type'
   APPLICATION_ID = 'application_id'
   TOTAL_CHILDREN_COUNT = 'total_children_count'
+  CHILDREN = 'children'
+  PARENT = 'parent'
+  VALID_STREAM_IDS = 'valid_stream_ids'
+  INVALID_STREAM_IDS = 'invalid_stream_ids'
 end

speckle_connector/src/constants/mat_constants.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  MAT_DICTIONARY = 'Speckle_Connector_Materials'
+  MAT_ID = 'Speckle_Connector_Material_Id'
+
+  MAT_ADD = :speckle_connector_add_material
+  MAT_EDIT = :speckle_connector_edit_material
+  MAT_REMOVE = :speckle_connector_remove_material
+
+  DEFAULT_COLORS = {
+    MAT_ADD => '#66FF66',
+    MAT_EDIT => '#FFFF9F',
+    MAT_REMOVE => '#FF6666'
+  }.freeze
+
+  DEFAULT_NAMES = {
+    MAT_ADD => 'Speckle_Material_Add',
+    MAT_EDIT => 'Speckle_Material_Edit',
+    MAT_REMOVE => 'Speckle_Material_Remove'
+  }.freeze
+end

speckle_connector/src/constants/observer_constants.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  APP_OBSERVER = 'SpeckleConnector::Observers::AppObserver'
+  ENTITIES_OBSERVER = 'SpeckleConnector::Observers::EntitiesObserver'
+  MODEL_OBSERVER = 'SpeckleConnector::Observers::ModelObserver'
+end

speckle_connector/src/constants/path_constants.rb

@@ -7,6 +7,7 @@ require_relative 'platform_constants'
 module SpeckleConnector
   dir = __dir__.dup
   dir.force_encoding('UTF-8') if dir.respond_to?(:force_encoding)
+  HOME_PATH = (ENV['HOME']).to_s
   SPECKLE_SRC_PATH = Pathname.new(File.expand_path('..', dir)).cleanpath.to_s
   SPECKLE_APPDATA_PATH = case OPERATING_SYSTEM
                          when OS_WIN
@@ -18,4 +19,6 @@ module SpeckleConnector
                            raise 'Speckle could not determine your Appdata path'
                          end
   SPECKLE_ACCOUNTS_DB_PATH = File.join(SPECKLE_APPDATA_PATH, 'Accounts.db')
+  SPECKLE_CONFIG_DB_PATH = File.join(SPECKLE_APPDATA_PATH, 'Config.db')
+  SPECKLE_TEST_DB_PATH = File.join(SPECKLE_APPDATA_PATH, 'sketchup_test.db')
 end

speckle_connector/src/constants/pref_constants.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require_relative '../speckle_objects/geometry/length'
+
+module SpeckleConnector
+  COMBINE_FACES_BY_MATERIAL = :combine_faces_by_material
+  INCLUDE_ENTITY_ATTRIBUTES = :include_entity_attributes
+  INCLUDE_FACE_ENTITY_ATTRIBUTES = :include_face_entity_attributes
+  INCLUDE_EDGE_ENTITY_ATTRIBUTES = :include_edge_entity_attributes
+  INCLUDE_GROUP_ENTITY_ATTRIBUTES = :include_group_entity_attributes
+  INCLUDE_COMPONENT_ENTITY_ATTRIBUTES = :include_component_entity_attributes
+  MERGE_COPLANAR_FACES = :merge_coplanar_faces
+
+  LEVEL_SHIFT_VALUE = SpeckleObjects::Geometry.length_to_native(1.5, 'm')
+
+  DEFAULT_MODEL_PREFERENCES = {
+    COMBINE_FACES_BY_MATERIAL => true,
+    INCLUDE_ENTITY_ATTRIBUTES => true,
+    INCLUDE_FACE_ENTITY_ATTRIBUTES => true,
+    INCLUDE_EDGE_ENTITY_ATTRIBUTES => true,
+    INCLUDE_GROUP_ENTITY_ATTRIBUTES => true,
+    INCLUDE_COMPONENT_ENTITY_ATTRIBUTES => true,
+    MERGE_COPLANAR_FACES => true
+  }.freeze
+end

speckle_connector/src/constants/type_constants.rb

@@ -2,4 +2,18 @@
 
 module SpeckleConnector
   BASE_OBJECT = 'Base'
+
+  OBJECTS_BUILTELEMENTS_VIEW3D = 'Objects.BuiltElements.View:Objects.BuiltElements.View3D'
+
+  OBJECTS_GEOMETRY_LINE = 'Objects.Geometry.Line'
+  OBJECTS_GEOMETRY_POLYLINE = 'Objects.Geometry.Polyline'
+  OBJECTS_GEOMETRY_MESH = 'Objects.Geometry.Mesh'
+  OBJECTS_GEOMETRY_BREP = 'Objects.Geometry.Brep'
+
+  OBJECTS_OTHER_BLOCKINSTANCE = 'Objects.Other.BlockInstance'
+  OBJECTS_OTHER_BLOCKINSTANCE_FULL = 'Objects.Other.Instance:Objects.Other.BlockInstance'
+  OBJECTS_OTHER_INSTANCE = 'Objects.Other.Instance:Objects.Other.Instance'
+  OBJECTS_OTHER_REVIT_REVITINSTANCE = 'Objects.Other.Revit.RevitInstance'
+  OBJECTS_OTHER_BLOCKDEFINITION = 'Objects.Other.BlockDefinition'
+  OBJECTS_OTHER_RENDERMATERIAL = 'Objects.Other.RenderMaterial'
 end

speckle_connector/src/convertors/base_object_serializer.rb

@@ -5,6 +5,7 @@ require 'securerandom'
 # rubocop:enable SketchupPerformance/OpenSSL
 require 'digest'
 require_relative 'converter'
+require_relative '../speckle_entities/speckle_entity'
 require_relative '../relations/many_to_one_relation'
 
 module SpeckleConnector
@@ -15,7 +16,16 @@ module SpeckleConnector
       # @return [Integer] default chunk size the determine splitting base prop into chucks
       attr_reader :default_chunk_size
 
-      def initialize(default_chunk_size = 1000)
+      # @return [String] stream id to send conversion
+      attr_reader :stream_id
+
+      attr_accessor :speckle_state
+
+      # @param stream_id [String] stream id to send conversion
+      def initialize(speckle_state, stream_id, preferences, default_chunk_size = 1000)
+        @speckle_state = speckle_state
+        @stream_id = stream_id
+        @preferences = preferences
         @default_chunk_size = default_chunk_size
         @detach_lineage = []
         @lineage = []
@@ -30,31 +40,55 @@ module SpeckleConnector
       def serialize(base)
         id, traversed = traverse_base(base)
         @objects[id] = traversed
-        return id, traversed
+        id
       end
 
       def total_children_count(id)
         @objects[id][:totalChildrenCount]
       end
 
-      # @param base [Object] base object to populate all children and their relationship
+      # @param base_and_entities [Object] base object to populate all children and their relationship
       # rubocop:disable Metrics/MethodLength
-      def traverse_base(base)
+      # rubocop:disable Metrics/PerceivedComplexity
+      # rubocop:disable Metrics/CyclomaticComplexity
+      # rubocop:disable Metrics/AbcSize
+      def traverse_base(base_and_entities)
+        base, entities = base_and_entities
+
         # 1. Create random string for lineage tracking.
         @lineage.append(SecureRandom.hex)
 
-        # 2. Initialize traversed base object that will be filled with traversed values or
+        # 2. Get last item from detach_lineage array
+        is_detached = @detach_lineage.pop
+
+        # unless entities.nil?
+        #   is_sent_before = entities.all? do |entity|
+        #     check_base_available_on_state(entity, speckle_state)
+        #   end
+        #   if is_sent_before
+        #     speckle_entity = speckle_state.speckle_entities[entities.first.persistent_id]
+        #     ref_object = detach_helper(speckle_entity.id)
+        #     parent = @lineage[-1]
+        #     unless @family_tree[parent].nil?
+        #       @family_tree[parent] = @family_tree[parent].merge(speckle_entity.speckle_object[:__closure])
+        #     end
+        #     @objects[speckle_entity.id] = ref_object if is_detached
+        #     return speckle_entity.id, ref_object
+        #   end
+        # end
+
+        # 3. Initialize traversed base object that will be filled with traversed values or
         # traversed base objects as props.
         traversed_base = SpeckleObjects::Base.new(speckle_type: base[:speckle_type], id: '')
+
+        # 3.1 Remove applicationId if it is nil
         traversed_base.delete(:applicationId)
 
-        # 3. Iterate all entries (key, value) of the base {Base > Hash} object
+        # 4. Iterate all entries (key, value) of the base {Base > Hash} object
+        # speckle_state = traverse_base_props(base, traversed_base)
         traverse_base_props(base, traversed_base)
         # this is where all props are done for current `traversed_base`
 
-        # 4. Get last item from detach_lineage array
-        is_detached = @detach_lineage.pop
-
         # 5. Add closures
         closure = {}
         parent = @lineage.pop
@@ -82,9 +116,19 @@ module SpeckleConnector
         # 10. Save object string if detached
         @objects[id] = traversed_base if is_detached
 
+        if @preferences[:user][:register_speckle_entity] && !entities.nil?
+          entities.uniq.each do |entity|
+            speckle_entity = create_or_update_speckle_entity(entity, id, traversed_base)
+            @speckle_state = speckle_state.with_speckle_entity(speckle_entity)
+          end
+        end
+
         return id, traversed_base
       end
       # rubocop:enable Metrics/MethodLength
+      # rubocop:enable Metrics/PerceivedComplexity
+      # rubocop:enable Metrics/CyclomaticComplexity
+      # rubocop:enable Metrics/AbcSize
 
       # rubocop:disable Metrics/MethodLength
       # rubocop:disable Metrics/AbcSize
@@ -102,14 +146,16 @@ module SpeckleConnector
             next
           end
 
-          # 3.3. Determine prop is detached or not
-          is_prop_detach = prop[0] == '@'
+          # 3.3. Determine prop is dynamically detached or not
+          is_detach_prop = prop[0] == '@'
+          is_dynamically_detached = prop[0] == '@' && prop.length > 2 && prop[1] == '@'
+          prop = prop[2..-1] if is_dynamically_detached
 
           # 3.4. Check prop needs to split into chunks
           chunked_detach_match = prop.match(/^@\((\d*)\)/)
 
           # 3.5. If split chunk is needed and prop value is array, then run chunking process
-          if value.is_a?(Array) && chunked_detach_match
+          if value.is_a?(Array) && !base_and_entities?(value) && chunked_detach_match
             # 3.5.1. Determine chunk size, get it from prop if defined. ex: '@(31250)faces' -> 31250 = chunk size
             chunk_size = chunked_detach_match[1] == '' ? default_chunk_size : chunked_detach_match[1].to_i
 
@@ -144,7 +190,7 @@ module SpeckleConnector
             chunk_references = []
 
             chunks.each do |chunk_element|
-              @detach_lineage.append(is_prop_detach)
+              @detach_lineage.append(is_detach_prop)
               id, _traversed = traverse_base(chunk_element)
               chunk_references.append(detach_helper(id))
             end
@@ -152,17 +198,21 @@ module SpeckleConnector
             # 3.5.7. Add chunk references to the traversed base prop without @(<chunk_size>)
             traversed_base[prop.to_s.sub(chunked_detach_match[0], '')] = chunk_references
 
-            # 3.5.8. We are done chunking, good to go next
+            # 3.5.8. We are done chunking, good to go next property
             next
           end
 
+          child = traverse_value(value, is_detach_prop)
+
+          is_base = (value.is_a?(Hash) && !value[:speckle_type].nil?) ||
+                    (base_and_entities?(value) && value[0].is_a?(Hash) && !value[0][:speckle_type].nil?)
+
           # 3.6. traverse value according to value is a speckle object or not
-          if value.is_a?(Hash) && !value[:speckle_type].nil?
-            child = traverse_value(value, is_prop_detach)
-            traversed_base[prop] = is_prop_detach ? detach_helper(child[:id]) : child
-          else
-            traversed_base[prop] = traverse_value(value, is_prop_detach)
-          end
+          traversed_base[prop] = if is_base
+                                   is_detach_prop ? detach_helper(child[:id]) : child
+                                 else
+                                   child
+                                 end
         end
       end
       # rubocop:enable Metrics/MethodLength
@@ -171,38 +221,57 @@ module SpeckleConnector
       # rubocop:enable Metrics/CyclomaticComplexity
       # rubocop:enable Metrics/PerceivedComplexity
 
+      # Whether value has a pattern [<converted>, [<entity>, <entity>, ... <entity>]] or not.
+      def base_and_entities?(value)
+        is_array = value.is_a?(Array)
+        return false unless is_array
+
+        return false unless is_array && value.length == 2
+
+        value[1].all? { |v| v.is_a?(Sketchup::Entity) }
+      end
+
       # rubocop:disable Metrics/MethodLength
       # rubocop:disable Metrics/CyclomaticComplexity
       # rubocop:disable Metrics/PerceivedComplexity
       # rubocop:disable Style/OptionalBooleanParameter
+      # rubocop:disable Metrics/AbcSize
       def traverse_value(value, is_detach = false)
         # 1. Return same value if value is primitive type (string, numeric, boolean)
         return value unless value.is_a?(Hash) || value.is_a?(Array)
 
-        # 2. Arrays
-        if value.is_a?(Array)
+        # 2. For pure arrays (Without referencing any Sketchup Entity)
+        if value.is_a?(Array) && !base_and_entities?(value)
+
           # 2.1. If it is not detached then iterate array by traversing with their value
-          return value.collect { |el| traverse_value(el) } unless is_detach
+          unless is_detach
+            values = value.collect do |el|
+              el_value = traverse_value(el)
+              el_value
+            end
+            return values
+          end
 
           # 2.2. If it is detached than collect them into detached_list
           detached_list = []
           value.each do |el|
-            if (el.is_a?(Array) || el.is_a?(Hash)) && !el[:speckle_type].nil?
+            if (el.is_a?(Hash) && !el[:speckle_type].nil?) || base_and_entities?(el)
               @detach_lineage.append(is_detach)
               id, _traversed_base = traverse_base(el)
               detached_list.append(detach_helper(id))
             else
-              detached_list.append(traverse_value(el, is_detach))
+              el_value = traverse_value(el, is_detach)
+              detached_list.append(el_value)
             end
           end
           return detached_list
         end
 
         # 3. Hash
-        return value if value[:speckle_type].nil?
+        return value if value.is_a?(Hash) && value[:speckle_type].nil?
 
         # 4. Base objects
-        unless value[:speckle_type].nil?
+        if (value.is_a?(Hash) && !value[:speckle_type].nil?) || base_and_entities?(value)
           @detach_lineage.append(is_detach)
           _id, traversed_base = traverse_base(value)
           return traversed_base
@@ -215,6 +284,7 @@ module SpeckleConnector
       # rubocop:enable Metrics/CyclomaticComplexity
       # rubocop:enable Metrics/PerceivedComplexity
       # rubocop:enable Style/OptionalBooleanParameter
+      # rubocop:enable Metrics/AbcSize
 
       def detach_helper(reference_id)
         @lineage.each do |parent|
@@ -263,6 +333,32 @@ module SpeckleConnector
         batches
       end
       # rubocop:enable Metrics/MethodLength
+
+      # @param entity [Sketchup::Entity] source entity object
+      # @param speckle_state [States::SpeckleState] the current speckle state of the {States::State}
+      def check_base_available_on_state(entity, speckle_state)
+        is_exist = speckle_state.speckle_entities.keys.include?(entity.persistent_id)
+        return is_exist unless is_exist
+
+        speckle_state.speckle_entities[entity.persistent_id].valid_stream_ids.include?(stream_id)
+      end
+
+      # Creates or updates speckle entity.
+      # If speckle entity exist in state, creates new one by updating old one.
+      # Else creates new one
+      # @return [SpeckleEntity] speckle entity that collects both speckle and sketchup information.
+      def create_or_update_speckle_entity(entity, id, traversed_base)
+        if speckle_state.speckle_entities.keys.include?(entity.persistent_id)
+          speckle_state.speckle_entities[entity.persistent_id].with_valid_stream_id(stream_id)
+        else
+          children = traversed_base[:__closure].nil? ? {} : traversed_base[:__closure]
+          speckle_entity = SpeckleEntities::SpeckleEntity.new(entity, id, entity.persistent_id,
+                                                              traversed_base[:speckle_type],
+                                                              children.keys, [stream_id])
+          speckle_entity.write_initial_base_data
+          speckle_entity
+        end
+      end
     end
   end
 end

speckle_connector/src/convertors/clean_up.rb

@@ -17,6 +17,11 @@ module SpeckleConnector
         faces.each { |face| face.edges.each { |edge| edges << edge } }
         edges.uniq!
         edges.each { |edge| remove_edge_have_coplanar_faces(edge, faces, false) }
+        merged_faces(faces)
+      end
+
+      def self.merged_faces(faces)
+        faces.reject(&:deleted?)
       end
 
       # Detect edges to remove by checking following controls respectively;

speckle_connector/src/convertors/converter.rb

@@ -4,18 +4,32 @@ module SpeckleConnector
   module Converters
     # Helper class to convert geometries between server and Sketchup.
     class Converter
+      # @return [States::State] the current state of the {SpeckleConnector::App}
+      attr_reader :state
+
+      # @return [States::SpeckleState] the current speckle state of the {States::State}
+      attr_reader :speckle_state
+
       # @return [Sketchup::Model] active sketchup model.
       attr_reader :sketchup_model
 
-      attr_accessor :units, :definitions, :registry, :entity_observer
+      # @return [String] stream id that conversion happening with it
+      attr_reader :stream_id
 
-      def initialize(sketchup_model)
-        @sketchup_model = sketchup_model
-        su_unit = @sketchup_model.options['UnitsOptions']['LengthUnit']
+      # @return [String] speckle units
+      attr_reader :units
+
+      attr_accessor :definitions
+
+      # @param state [States::State] the current state of the {SpeckleConnector::App}
+      def initialize(state, stream_id)
+        @state = state
+        @speckle_state = state.speckle_state
+        @sketchup_model = state.sketchup_state.sketchup_model
+        @stream_id = stream_id
+        su_unit = state.sketchup_state.length_units
         @units =  Converters::SKETCHUP_UNITS[su_unit]
         @definitions = {}
-        # @registry = Sketchup.active_model.attribute_dictionary("speckle_id_registry", true)
-        # @entity_observer = SpeckleEntityObserver.new
       end
     end
   end

speckle_connector/src/convertors/to_native.rb

@@ -1,18 +1,36 @@
 # frozen_string_literal: true
 
 require_relative 'converter'
+require_relative '../constants/type_constants'
 require_relative '../speckle_objects/other/transform'
 require_relative '../speckle_objects/other/render_material'
 require_relative '../speckle_objects/other/block_definition'
 require_relative '../speckle_objects/other/block_instance'
+require_relative '../speckle_objects/other/display_value'
+require_relative '../speckle_objects/other/revit/revit_instance'
 require_relative '../speckle_objects/geometry/point'
 require_relative '../speckle_objects/geometry/line'
 require_relative '../speckle_objects/geometry/mesh'
+require_relative '../speckle_objects/built_elements/view3d'
 
 module SpeckleConnector
   module Converters
     # Converts sketchup entities to speckle objects.
+    # rubocop:disable Metrics/ClassLength
     class ToNative < Converter
+      # @return [States::SpeckleState] the current speckle state of the {States::State}
+      attr_accessor :speckle_state
+
+      # @return [String] source application of received object that will be converted to native
+      attr_reader :source_app
+
+      def initialize(state, stream_id, stream_name, branch_name, source_app)
+        super(state, stream_id)
+        @stream_name = stream_name
+        @branch_name = branch_name
+        @source_app = source_app.downcase
+      end
+
       # Module aliases
       GEOMETRY = SpeckleObjects::Geometry
       OTHER = SpeckleObjects::Other
@@ -23,6 +41,9 @@ module SpeckleConnector
       MESH = GEOMETRY::Mesh
       BLOCK_DEFINITION = OTHER::BlockDefinition
       BLOCK_INSTANCE = OTHER::BlockInstance
+      REVIT_INSTANCE = OTHER::Revit::RevitInstance
+      RENDER_MATERIAL = OTHER::RenderMaterial
+      DISPLAY_VALUE = OTHER::DisplayValue
 
       BASE_OBJECT_PROPS = %w[applicationId id speckle_type totalChildrenCount].freeze
       CONVERTABLE_SPECKLE_TYPES = %w[
@@ -31,11 +52,114 @@ module SpeckleConnector
         Objects.Geometry.Mesh
         Objects.Geometry.Brep
         Objects.Other.BlockInstance
+        Objects.Other.Revit.RevitInstance
         Objects.Other.BlockDefinition
         Objects.Other.RenderMaterial
+        Objects.Other.Instance:Objects.Other.BlockInstance
       ].freeze
 
-      def can_convert_to_native(obj)
+      def from_revit
+        @from_revit ||= source_app.include?('revit')
+      end
+
+      def from_sketchup
+        @from_sketchup ||= source_app.include?('sketchup')
+      end
+
+      # ReceiveObjects action call this method by giving everything that comes from server.
+      # Upcoming object is a referencedObject of selected commit to receive.
+      # UI is responsible currently to fetch objects from ObjectLoader module by calling getAndConstruct method.
+      # @param obj [Object] speckle commit object.
+      def receive_commit_object(obj)
+        # First create layers on the sketchup before starting traversing
+        # @Named Views are exception here. It does not mean a layer. But it is anti-pattern for now.
+        filtered_layer_containers = obj.keys.filter_map { |key| key if key.start_with?('@') && key != '@Named Views' }
+        create_layers(filtered_layer_containers, sketchup_model.layers) unless from_revit
+        # Convert views to sketchup scenes
+        SpeckleObjects::BuiltElements::View3d.to_native(obj, sketchup_model)
+        # Get default commit layer from sketchup model which will be used as fallback
+        default_commit_layer = sketchup_model.layers.layers.find { |layer| layer.display_name == '@Untagged' }
+        @entities_to_fill = entities_to_fill(obj)
+        traverse_commit_object(obj, sketchup_model.layers, default_commit_layer, @entities_to_fill)
+        create_levels_from_section_planes
+        check_hiding_layers_needed
+        @state
+      end
+
+      def levels_layer
+        @levels_layer ||= sketchup_model.layers.add('Levels')
+      end
+
+      # Create levels from section planes that already created for this commit object.
+      # rubocop:disable Metrics/AbcSize
+      # rubocop:disable Metrics/MethodLength
+      def create_levels_from_section_planes
+        return unless from_revit
+
+        section_planes = @entities_to_fill.grep(Sketchup::SectionPlane)
+        bbox = @entities_to_fill.parent.bounds
+        c_1 = bbox.corner(0)
+        c_2 = bbox.corner(1)
+        c_3 = bbox.corner(3)
+        c_4 = bbox.corner(2)
+        section_planes.each do |section_plane|
+          level_name = "#{@definition_name}-#{section_plane.name}"
+          definition = sketchup_model.definitions.add(level_name)
+          @entities_to_fill.add_instance(definition, Geom::Transformation.new)
+          elevation = section_plane.bounds.center.z
+          c1_e = Geom::Point3d.new(c_1.x, c_1.y, elevation - LEVEL_SHIFT_VALUE)
+          c2_e = Geom::Point3d.new(c_2.x, c_2.y, elevation - LEVEL_SHIFT_VALUE)
+          c3_e = Geom::Point3d.new(c_3.x, c_3.y, elevation - LEVEL_SHIFT_VALUE)
+          c4_e = Geom::Point3d.new(c_4.x, c_4.y, elevation - LEVEL_SHIFT_VALUE)
+          cline_1 = definition.entities.add_cline(c1_e, c2_e)
+          cline_2 = definition.entities.add_cline(c2_e, c3_e)
+          cline_3 = definition.entities.add_cline(c3_e, c4_e)
+          cline_4 = definition.entities.add_cline(c4_e, c1_e)
+          text = definition.entities.add_text(" #{section_plane.name}", c1_e)
+          [cline_1, cline_2, cline_3, cline_4, text, definition].each { |o| o.layer = levels_layer }
+        end
+      end
+      # rubocop:enable Metrics/AbcSize
+      # rubocop:enable Metrics/MethodLength
+
+      def entities_to_fill(_obj)
+        return sketchup_model.entities if from_sketchup
+
+        @definition_name = "#{@branch_name}-#{@stream_name}"
+        definition = sketchup_model.definitions.find { |d| d.name == @definition_name }
+        if definition.nil?
+          definition = sketchup_model.definitions.add(@definition_name)
+          sketchup_model.entities.add_instance(definition, Geom::Transformation.new)
+        end
+        definition.entities
+      end
+
+      LAYERS_WILL_BE_HIDDEN = [
+        'Rooms',
+        'Mass',
+        'Mass Floor',
+        'Grid',
+        'Shaft Openings'
+      ].freeze
+
+      def check_hiding_layers_needed
+        return unless from_revit
+
+        sketchup_model.layers.each do |layer|
+          if LAYERS_WILL_BE_HIDDEN.any? { |layer_name| layer.display_name.include?(layer_name) }
+            layer.visible = false
+            sketchup_model.pages.each { |page| page.update(PAGE_USE_LAYER_VISIBILITY) }
+          end
+        end
+      end
+
+      # Conditions for converting speckle object to native sketchup entity:
+      #  1- `obj` is a hash
+      #  2- `obj` has a property as 'speckle_type'
+      #  3- `obj` is a convertable 'speckle_type' which sketchup supports
+      # @param obj [Object] candidate object to convert from speckle to sketchup.
+      # @return [Boolean] whether object is convertable or not.
+      def convertible_to_native?(obj)
         return false unless obj.is_a?(Hash) && obj.key?('speckle_type')
 
         CONVERTABLE_SPECKLE_TYPES.include?(obj['speckle_type'])
@@ -45,15 +169,6 @@ module SpeckleConnector
         ['Objects.BuiltElements.Revit.Parameter'].include?(obj['speckle_type'])
       end
 
-      # @param obj [Object] speckle commit object.
-      def receive_commit_object(obj)
-        # First create layers on the sketchup before starting traversing
-        create_layers(obj.keys.filter_map { |key| key if key.start_with?('@') }, sketchup_model.layers)
-        # Define default commit layer which is the fallback
-        default_commit_layer = sketchup_model.layers.layers.find { |layer| layer.display_name == '@Untagged' }
-        traverse_commit_object(obj, sketchup_model.layers, default_commit_layer)
-      end
-
       # Create actual Sketchup layers from layer_paths that taken from Speckle base object.
       # @param layer_paths [Array<String>] layer paths to decompose it to folders and it's layers.
       # @param folder [Sketchup::Layers, Sketchup::LayerFolder] folder to create folders and layers under it.
@@ -107,9 +222,9 @@ module SpeckleConnector
       #   self-caller method means that call itself according to conditions inside of it.
       # rubocop:disable Metrics/CyclomaticComplexity
       # rubocop:disable Metrics/PerceivedComplexity
-      def traverse_commit_object(obj, commit_folder, layer)
-        if can_convert_to_native(obj)
-          convert_to_native(obj, layer)
+      def traverse_commit_object(obj, commit_folder, layer, entities)
+        if convertible_to_native?(obj)
+          @state = convert_to_native(@state, obj, layer, entities)
         elsif obj.is_a?(Hash) && obj.key?('speckle_type')
           return if ignored_speckle_type?(obj)
 
@@ -119,16 +234,16 @@ module SpeckleConnector
             props.each do |prop|
               layer_path = prop if prop.start_with?('@') && obj[prop].is_a?(Array)
               layer = find_layer(layer_path, commit_folder, layer)
-              traverse_commit_object(obj[prop], commit_folder, layer)
+              traverse_commit_object(obj[prop], commit_folder, layer, entities)
             end
           else
             # puts(">>> Found #{obj['speckle_type']}: #{obj['id']} with displayValue.")
-            convert_to_native(obj, layer)
+            @state = convert_to_native(@state, obj, layer, entities)
           end
         elsif obj.is_a?(Hash)
-          obj.each_value { |value| traverse_commit_object(value, commit_folder, layer) }
+          obj.each_value { |value| traverse_commit_object(value, commit_folder, layer, entities) }
         elsif obj.is_a?(Array)
-          obj.each { |value| traverse_commit_object(value, commit_folder, layer) }
+          obj.each { |value| traverse_commit_object(value, commit_folder, layer, entities) }
         end
       end
       # rubocop:enable Metrics/CyclomaticComplexity
@@ -166,53 +281,105 @@ module SpeckleConnector
         end
       end
 
-      # rubocop:disable Metrics/CyclomaticComplexity
-      def convert_to_native(obj, layer, entities = sketchup_model.entities)
-        convert = method(:convert_to_native)
-        return display_value_to_native_component(obj, layer, entities, &convert) unless obj['displayValue'].nil?
+      def speckle_object_to_native(obj)
+        return DISPLAY_VALUE.method(:to_native) unless obj['displayValue'].nil?
 
-        case obj['speckle_type']
-        when 'Objects.Geometry.Line', 'Objects.Geometry.Polyline' then LINE.to_native(obj, layer, entities)
-        when 'Objects.Other.BlockInstance' then BLOCK_INSTANCE.to_native(sketchup_model, obj, layer, entities, &convert)
-        when 'Objects.Other.BlockDefinition' then BLOCK_DEFINITION.to_native(sketchup_model, obj, layer,
-                                                                             obj['name'],
-                                                                             entities,
-                                                                             &convert)
-        when 'Objects.Geometry.Mesh' then MESH.to_native(sketchup_model, obj, layer, entities)
-        when 'Objects.Geometry.Brep' then MESH.to_native(sketchup_model, obj['displayValue'], layer, entities)
+        SPECKLE_OBJECT_TO_NATIVE[obj['speckle_type']]
+      end
+
+      SPECKLE_OBJECT_TO_NATIVE = {
+        OBJECTS_GEOMETRY_LINE => LINE.method(:to_native),
+        OBJECTS_GEOMETRY_POLYLINE => LINE.method(:to_native),
+        OBJECTS_GEOMETRY_MESH => MESH.method(:to_native),
+        OBJECTS_GEOMETRY_BREP => MESH.method(:to_native),
+        OBJECTS_OTHER_BLOCKDEFINITION => BLOCK_DEFINITION.method(:to_native),
+        OBJECTS_OTHER_BLOCKINSTANCE => BLOCK_INSTANCE.method(:to_native),
+        OBJECTS_OTHER_BLOCKINSTANCE_FULL => BLOCK_INSTANCE.method(:to_native),
+        OBJECTS_OTHER_REVIT_REVITINSTANCE => REVIT_INSTANCE.method(:to_native),
+        OBJECTS_OTHER_RENDERMATERIAL => RENDER_MATERIAL.method(:to_native)
+      }.freeze
+
+      # @param state [States::State] state of the speckle application
+      def convert_to_native(state, obj, layer, entities = sketchup_model.entities)
+        # store this method as parameter to re-call it inner callstack
+        convert_to_native = method(:convert_to_native)
+        # Get 'to_native' method to convert upcoming speckle object to native sketchup entity
+        to_native_method = speckle_object_to_native(obj)
+        # Call 'to_native' method by passing this method itself to handle nested 'to_native' conversions.
+        # It returns updated state and converted entities.
+        state, converted_entities = to_native_method.call(state, obj, layer, entities, &convert_to_native)
+        if from_revit
+          # Create levels as section planes if they exists
+          create_levels(state, obj)
+          # Create layers from category of object and place object in it
+          create_layers_from_categories(state, obj, converted_entities)
         end
+        # Create speckle entities from sketchup entities to achieve continuous traversal.
+        convert_to_speckle_entities(state, obj, converted_entities)
       rescue StandardError => e
         puts("Failed to convert #{obj['speckle_type']} (id: #{obj['id']})")
         puts(e)
-        nil
+        return state
+      end
+
+      # rubocop:disable Metrics/CyclomaticComplexity
+      # rubocop:disable Metrics/PerceivedComplexity
+      def create_layers_from_categories(state, speckle_object, entities)
+        return state if speckle_object['category'].nil?
+
+        layer = sketchup_model.layers.find { |l| l.display_name == speckle_object['category'] }
+        unless layer.nil?
+          entities.each { |entity| entity.layer = layer } if layer
+          return state
+        end
+
+        layer = sketchup_model.layers.add(speckle_object['category'])
+        unless layer.nil?
+          entities.each { |entity| entity.layer = layer } if layer
+          state
+        end
+        state
       end
       # rubocop:enable Metrics/CyclomaticComplexity
+      # rubocop:enable Metrics/PerceivedComplexity
 
-      # Creates a component definition and instance from a speckle object with a display value
-      def display_value_to_native_component(obj, layer, entities, &convert)
-        obj_id = obj['applicationId'].to_s.empty? ? obj['id'] : obj['applicationId']
-        definition = BLOCK_DEFINITION.to_native(
-          sketchup_model,
-          obj['displayValue'],
-          layer,
-          "def::#{obj_id}",
-          obj_id,
-          &convert
-        )
+      # @param state [States::State] state of the speckle application
+      def create_levels(state, speckle_object)
+        return state if speckle_object['level'].nil?
+        return state unless speckle_object['level']['speckle_type'].include?('Objects.BuiltElements.Level')
 
-        find_and_erase_existing_instance(definition, obj_id)
-        t_arr = obj['transform']
-        transform = t_arr.nil? ? Geom::Transformation.new : OTHER::Transform.to_native(t_arr, units)
-        instance = entities.add_instance(definition, transform)
-        instance.name = obj_id
-        instance
+        level_name = speckle_object['level']['name'] || speckle_object['level']['id']
+        is_exist = @entities_to_fill.grep(Sketchup::SectionPlane).any? { |sp| sp.name == level_name }
+        return state if is_exist
+
+        elevation = SpeckleObjects::Geometry.length_to_native(speckle_object['level']['elevation'],
+                                                              speckle_object['level']['units'])
+
+        section_plane = @entities_to_fill.add_section_plane([0, 0, elevation + LEVEL_SHIFT_VALUE], [0, 0, -1])
+        section_plane.name = level_name
+        state
       end
 
-      # Takes a component definition and finds and erases the first instance with the matching name
-      # (and optionally the applicationId)
-      def find_and_erase_existing_instance(definition, name, app_id = '')
-        definition.instances.find { |ins| ins.name == name || ins.guid == app_id }&.erase!
+      # @param state [States::State] state of the application
+      def convert_to_speckle_entities(state, speckle_object, entities)
+        speckle_id = speckle_object['id']
+        application_id = speckle_object['applicationId']
+        speckle_type = speckle_object['speckle_type']
+        children = speckle_object['__closure'].nil? ? [] : speckle_object['__closure']
+        speckle_state = state.speckle_state
+        entities.each do |entity|
+          next if entity.is_a?(Sketchup::Material)
+          next if (entity.is_a?(Sketchup::Face) || entity.is_a?(Sketchup::Edge)) &&
+                  !state.user_state.user_preferences[:register_speckle_entity]
+
+          ent = SpeckleEntities::SpeckleEntity.new(entity, speckle_id, application_id, speckle_type, children,
+                                                   [stream_id])
+          ent.write_initial_base_data
+          speckle_state = speckle_state.with_speckle_entity(ent)
+        end
+        state.with_speckle_state(speckle_state)
       end
     end
+    # rubocop:enable Metrics/ClassLength
   end
 end

speckle_connector/src/convertors/to_speckle.rb

@@ -4,64 +4,136 @@ require_relative 'converter'
 require_relative 'base_object_serializer'
 require_relative '../speckle_objects/base'
 require_relative '../speckle_objects/geometry/line'
+require_relative '../speckle_objects/geometry/length'
 require_relative '../speckle_objects/geometry/mesh'
 require_relative '../speckle_objects/other/block_instance'
 require_relative '../speckle_objects/other/block_definition'
+require_relative '../speckle_objects/other/rendering_options'
+require_relative '../speckle_objects/built_elements/view3d'
+require_relative '../constants/path_constants'
 
 module SpeckleConnector
   module Converters
     # Converts sketchup entities to speckle objects.
     class ToSpeckle < Converter
-      # @return [Hash{Symbol=>Array}] layers to hold it's objects under the base object.
-      attr_reader :layers
-
-      def initialize(sketchup_model)
-        super(sketchup_model)
-        @layers = add_all_layers
-      end
-
       # Convert selected objects by putting them into related array that grouped by layer.
       # @return [Hash{Symbol=>Array}] layers -which only have objects- to hold it's objects under the base object.
-      def convert_selection_to_base
+      def convert_selection_to_base(preferences)
+        layers = add_all_layers
+        state = speckle_state
         sketchup_model.selection.each do |entity|
-          converted_object = convert(entity)
+          new_speckle_state, converted_object_with_entity = convert(entity, preferences, state)
+          state = new_speckle_state
           layer_name = entity_layer_path(entity)
-          layers[layer_name].push(converted_object)
+          layers[layer_name].push(converted_object_with_entity)
         end
-        # send only layers that have any object
+        # send only+ layers that have any object
         base_object_properties = layers.reject { |_layer_name, objects| objects.empty? }
-        SpeckleObjects::Base.with_detached_layers(base_object_properties)
+        add_views(base_object_properties) if sketchup_model.pages.any?
+        return state, SpeckleObjects::Base.with_detached_layers(base_object_properties)
+      end
+
+      # Add views from pages.
+      # @param base_object_properties [Hash] dynamically attached base object properties.
+      def add_views(base_object_properties)
+        views = []
+        sketchup_model.pages.each do |page|
+          cam = page.camera
+          origin = get_camera_origin(cam)
+          target = get_camera_target(cam)
+          direction = get_camera_direction(cam)
+          update_properties = get_scene_update_properties(page)
+          rendering_options = SpeckleObjects::Others::RenderingOptions.to_speckle(page.rendering_options)
+          view = SpeckleObjects::BuiltElements::View3d.new(
+            page.name, origin, target, direction, SpeckleObjects::Geometry::Vector.new(0, 0, 1, @units),
+            cam.perspective?, cam.fov, @units, page.name, update_properties, rendering_options
+          )
+          views.append(view)
+        end
+        base_object_properties['@Named Views'] = views
+      end
+
+      # Get scene properties
+      # @param page [Sketchup::Page] page on sketchup.
+      def get_scene_update_properties(page)
+        {
+          use_axes: page.use_axes?,
+          use_camera: page.use_camera?,
+          use_hidden_geometry: page.use_hidden_geometry?,
+          use_hidden_layers: page.use_hidden_layers?,
+          use_hidden_objects: page.use_hidden_objects?,
+          use_rendering_options: page.use_rendering_options?,
+          use_section_planes: page.use_section_planes?,
+          use_shadow_info: page.use_shadow_info?,
+          use_style: page.use_style?
+        }
       end
 
       # Serialized and traversed information to send batches.
-      # @param base [SpeckleObjects::Base] base object to serialize.
+      # @param base_and_entity [SpeckleObjects::Base] base object to serialize.
       # @return [String, Integer, Array<Object>] base id, total_children_count of base and batches
-      def send_info(base)
-        serializer = SpeckleConnector::Converters::BaseObjectSerializer.new
-        # t = Time.now.to_f
-        id, _traversed = serializer.serialize(base)
-        # puts "Generating traversed object elapsed #{Time.now.to_f - t} s"
+      def serialize(base_and_entity, speckle_state, preferences)
+        serializer = SpeckleConnector::Converters::BaseObjectSerializer.new(speckle_state, stream_id, preferences)
+        t = Time.now.to_f
+        id = serializer.serialize(base_and_entity)
+        batches = serializer.batch_objects
+        # write_to_speckle_folder(id, batches)
+        puts "Generating traversed object elapsed #{Time.now.to_f - t} s"
         base_total_children_count = serializer.total_children_count(id)
-        return id, base_total_children_count, serializer.batch_objects
+        return id, base_total_children_count, batches, serializer.speckle_state
+      end
+
+      def write_to_speckle_folder(id, batches)
+        folder_path = "#{HOME_PATH}/Speckle"
+        file_path = "#{folder_path}/#{id}.json"
+        FileUtils.mkdir_p(folder_path) unless File.exist?(folder_path)
+        File.write(file_path, batches.first)
       end
 
       # @param entity [Sketchup::Entity] sketchup entity to convert Speckle.
-      def convert(entity)
+      # @param speckle_state [States::SpeckleState] the current speckle state of the {States::State}
+      # @param parent [Symbol, String] parent of the Sketchup Entity to be converted.
+      # rubocop:disable Metrics/MethodLength
+      def convert(entity, preferences, speckle_state, parent = :base)
         convert = method(:convert)
-        return SpeckleObjects::Geometry::Line.from_edge(entity, @units).to_h if entity.is_a?(Sketchup::Edge)
-        return SpeckleObjects::Geometry::Mesh.from_face(entity, @units) if entity.is_a?(Sketchup::Face)
-        if entity.is_a?(Sketchup::Group)
-          return SpeckleObjects::Other::BlockInstance.from_group(entity, @units, @definitions, &convert)
-        end
-        if entity.is_a?(Sketchup::ComponentInstance)
-          return SpeckleObjects::Other::BlockInstance.from_component_instance(entity, @units, @definitions, &convert)
-        end
-        if entity.is_a?(Sketchup::ComponentDefinition)
-          return SpeckleObjects::Other::BlockDefinition.from_definition(entity, @units, @definitions, &convert)
+
+        if entity.is_a?(Sketchup::Edge)
+          line = SpeckleObjects::Geometry::Line.from_edge(entity, @units, preferences[:model]).to_h
+          return speckle_state, [line, [entity]]
         end
 
-        nil
+        if entity.is_a?(Sketchup::Face)
+          mesh = SpeckleObjects::Geometry::Mesh.from_face(entity, @units, preferences[:model])
+          return speckle_state, [mesh, [entity]]
+        end
+
+        if entity.is_a?(Sketchup::Group)
+          new_speckle_state, block_instance = SpeckleObjects::Other::BlockInstance.from_group(
+            entity, @units, preferences, speckle_state, &convert
+          )
+          speckle_state = new_speckle_state
+          return speckle_state, [block_instance, [entity]]
+        end
+
+        if entity.is_a?(Sketchup::ComponentInstance)
+          new_speckle_state, block_instance = SpeckleObjects::Other::BlockInstance.from_component_instance(
+            entity, @units, preferences, speckle_state, &convert
+          )
+          speckle_state = new_speckle_state
+          return speckle_state, [block_instance, [entity]]
+        end
+
+        if entity.is_a?(Sketchup::ComponentDefinition)
+          new_speckle_state, block_definition = SpeckleObjects::Other::BlockDefinition.from_definition(
+            entity, @units, @definitions, preferences, speckle_state, parent, &convert
+          )
+          speckle_state = new_speckle_state
+          return speckle_state, [block_definition, [entity]]
+        end
+
+        return speckle_state, nil
       end
+      # rubocop:enable Metrics/MethodLength
 
       # Create layers -> {Hash{Symbol=>Array}} from sketchup model with empty array as hash entry values.
       # This method add first headless layers (not belong to any folder),
@@ -124,6 +196,35 @@ module SpeckleConnector
           folder_name(folder.folder, folders.push(folder.display_name))
         end
       end
+
+      private
+
+      def get_camera_direction(cam)
+        SpeckleObjects::Geometry::Vector.new(
+          SpeckleObjects::Geometry.length_to_speckle(cam.direction[0], @units),
+          SpeckleObjects::Geometry.length_to_speckle(cam.direction[1], @units),
+          SpeckleObjects::Geometry.length_to_speckle(cam.direction[2], @units),
+          @units
+        )
+      end
+
+      def get_camera_target(cam)
+        SpeckleObjects::Geometry::Point.new(
+          SpeckleObjects::Geometry.length_to_speckle(cam.target[0], @units),
+          SpeckleObjects::Geometry.length_to_speckle(cam.target[1], @units),
+          SpeckleObjects::Geometry.length_to_speckle(cam.target[2], @units),
+          @units
+        )
+      end
+
+      def get_camera_origin(camera)
+        SpeckleObjects::Geometry::Point.new(
+          SpeckleObjects::Geometry.length_to_speckle(camera.eye[0], @units),
+          SpeckleObjects::Geometry.length_to_speckle(camera.eye[1], @units),
+          SpeckleObjects::Geometry.length_to_speckle(camera.eye[2], @units),
+          @units
+        )
+      end
     end
   end
 end

speckle_connector/src/observers/app_observer.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative 'event_observer'
+
+module SpeckleConnector
+  module Observers
+    # App observer.
+    class AppObserver < Sketchup::AppObserver
+      include EventObserver
+
+      # rubocop:disable Naming/MethodName
+      # SketchUp observer method triggered when new empty model is created.
+      #
+      # @param model (Sketchup::Model): The active model object.
+      def onNewModel(model)
+        push_event(:onNewModel, model)
+      end
+
+      # SketchUp observer method triggered when previously saved model is opened.
+      #
+      # @param model (Sketchup::Model) - The active model object.
+      def onOpenModel(model)
+        push_event(:onOpenModel, model)
+      end
+
+      # SketchUp observer method triggered when user exists SketchUp.
+      def onQuit
+        push_event(:onQuit)
+      end
+      # rubocop:enable Naming/MethodName
+    end
+  end
+end

speckle_connector/src/observers/entities_observer.rb

@@ -1,26 +1,30 @@
 # frozen_string_literal: true
 
+require_relative 'event_observer'
+
 module SpeckleConnector
   module Observers
     # Entities observer.
     class EntitiesObserver < Sketchup::EntitiesObserver
-      attr_accessor :registry
-
-      def initialize
-        super()
-        @registry = Sketchup.active_model.attribute_dictionary('speckle_id_registry', true)
-      end
+      include EventObserver
 
       # rubocop:disable Naming/MethodName
-      def onEraseEntity(entity)
-        app_id = entity.get_attribute('speckle', 'applicationId')
-        return if app_id.nil?
+      # @param entities (Sketchup::Entities)
+      # @param entity (Sketchup::Entity)
+      def onElementAdded(entities, entity)
+        push_event(:onElementAdded, entities, entity)
+      end
 
-        p(app_id)
+      # @param entities (Sketchup::Entities)
+      # @param entity (Sketchup::Entity)
+      def onElementModified(entities, entity)
+        push_event(:onElementModified, entities, entity)
+      end
 
-        @registry.delete_key(app_id)
-
-        p(@registry)
+      # @param entities (Sketchup::Entities)
+      # @param entity_id (Integer) id of the removed entity.
+      def onElementRemoved(entities, entity_id)
+        push_event(:onElementRemoved, entities, entity_id)
       end
       # rubocop:enable Naming/MethodName
     end

speckle_connector/src/observers/event_handler.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require_relative 'event_hash'
+require_relative '../actions/on_events_action'
+
+module SpeckleConnector
+  module Observers
+    # Event handler class.
+    class EventHandler
+      # @return [SpeckleConnectorApp] an object that contains current state of speckle objects
+      attr_reader :app
+
+      def initialize(app)
+        @app = app
+      end
+
+      def handle_events(events)
+        run_handlers(events)
+      end
+
+      def run_handlers(events)
+        app.update_state!(Actions::OnEventsAction, events)
+      end
+    end
+  end
+end

speckle_connector/src/observers/event_hash.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require_relative '../ext/immutable_ruby/core'
+
+module SpeckleConnector
+  module Observers
+    # Collection of events.
+    class EventHash < Immutable::Hash
+      def push_event(observer_class, event_name, data)
+        observer_events = self[observer_class] || Immutable::EmptyHash
+        name_events = observer_events[event_name] || Immutable::EmptyVector
+        name_events = name_events.add(data)
+        observer_events = observer_events.put(event_name, name_events)
+        put(observer_class, observer_events)
+      end
+    end
+
+    EMPTY_EVENT_HASH = EventHash.new([])
+  end
+end

speckle_connector/src/observers/event_observer.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require_relative 'event_hash'
+require_relative '../actions/on_events_action'
+
+module SpeckleConnector
+  module Observers
+    # Observer classes includes it to check common operations for all observer classes.
+    module EventObserver
+      # @return [ObserverHandler] handler for observer events
+      attr_reader :observer_handler
+
+      def initialize(observer_handler)
+        super()
+        @observer_handler = observer_handler
+      end
+
+      def push_event(event_name, *event_data)
+        return if observers_disabled?
+
+        @observer_handler.handle_event!(self.class.name, event_name, event_data)
+      end
+
+      def observers_disabled?
+        @observer_handler.observers_disabled?
+      end
+
+      # Push event only once. If the event is already registered, don't push it again
+      # @param event_name [Symbol] the name of the event
+      # @param event_data [Array] the optional data that comes with the event
+      def push_once(event_name, *event_data)
+        return if observers_disabled?
+
+        # Don't push anything if the selection event was already registered
+        class_events = @observer_handler.events[self.class]
+        events = class_events && class_events[event_name]
+        return if events&.any?
+
+        push_event(event_name, *event_data)
+      end
+    end
+  end
+end

speckle_connector/src/observers/factory.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require_relative 'app_observer'
+require_relative 'entities_observer'
+require_relative 'observer_handler'
+require_relative 'model_observer'
+require_relative 'event_handler'
+require_relative '../constants/observer_constants'
+
+module SpeckleConnector
+  module Observers
+    # Factory class to create observers and it's handler
+    module Factory
+      module_function
+
+      def create_handler(app)
+        event_handler = EventHandler.new(app)
+        ObserverHandler.new(event_handler)
+      end
+
+      def create_observers(handler)
+        {
+          APP_OBSERVER => AppObserver.new(handler),
+          ENTITIES_OBSERVER => EntitiesObserver.new(handler),
+          MODEL_OBSERVER => ModelObserver.new(handler)
+        }.freeze
+      end
+    end
+  end
+end

speckle_connector/src/observers/model_observer.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require_relative 'event_observer'
+
+module SpeckleConnector
+  module Observers
+    # Model related event observers.
+    class ModelObserver < Sketchup::ModelObserver
+      include EventObserver
+
+      # rubocop:disable Naming/MethodName
+      # @param model (Sketchup::Model)
+      def onActivePathChanged(model)
+        push_event(:onActivePathChanged, model)
+      end
+      # rubocop:enable Naming/MethodName
+    end
+  end
+end

speckle_connector/src/observers/observer_handler.rb

@@ -0,0 +1,68 @@
+# frozen_string_literal: true
+
+require_relative 'event_hash'
+
+module SpeckleConnector
+  module Observers
+    # Class to handle observer events.
+    class ObserverHandler
+      # @return [EventHash] registered events
+      attr_reader :events
+
+      # @return [Float] time when first observer was added
+      attr_reader :start_time
+
+      def initialize(event_handler)
+        @event_handler = event_handler
+        clear_events!
+        @observers_disabled = false
+        @observers_in_progress = false
+        @timer_in_progress = false
+      end
+
+      def handle_event!(observer_class, event_name, data)
+        puts "## Register #{observer_class} event #{event_name} ##"
+        puts "  data = #{data.inspect}"
+        return if observers_disabled?
+
+        @events = @events.push_event(observer_class, event_name, data)
+        finish
+      end
+
+      def finish
+        return if @observers_in_progress
+
+        @observers_in_progress = true
+        @start_time = Time.now.to_f
+        UI.start_timer(0, false) { finish_in_timer }
+      end
+
+      def finish_in_timer
+        return if @timer_in_progress
+
+        @timer_in_progress = true
+        @event_handler.handle_events(events)
+      ensure
+        clear_events!
+        @observers_in_progress = false
+        @timer_in_progress = false
+      end
+
+      def observers_disabled?
+        @observers_disabled
+      end
+
+      def with_observers_disabled(&block)
+        previous_state = @observers_disabled
+        @observers_disabled = true
+        block.call
+      ensure
+        @observers_disabled = previous_state
+      end
+
+      def clear_events!
+        @events = EMPTY_EVENT_HASH
+      end
+    end
+  end
+end

speckle_connector/src/preferences/preferences.rb

@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+require_relative '../ext/sqlite3'
+require_relative '../immutable/immutable'
+require_relative '../constants/path_constants'
+require_relative '../constants/pref_constants'
+require_relative '../sketchup_model/dictionary/speckle_model_dictionary_handler'
+
+module SpeckleConnector
+  # Preferences that stored on config database and sketchup_model.
+  module Preferences
+    include Immutable::ImmutableUtils
+    DICT_HANDLER = SketchupModel::Dictionary::SpeckleModelDictionaryHandler
+    # rubocop:disable Layout/LineLength
+    DEFAULT_CONFIG = "('configSketchup', '{\"dark_theme\":false, \"diffing\":false, \"register_speckle_entity\":false}');"
+    # rubocop:enable Layout/LineLength
+    DEFAULT_PREFERENCES = '{"dark_theme":false, "diffing":false, "register_speckle_entity": false}'
+
+    # @param sketchup_model [Sketchup::Model] active model.
+    def self.read_preferences(sketchup_model)
+      db = Sqlite3::Database.new(SPECKLE_CONFIG_DB_PATH)
+      user_preferences = validate_user_preferences(db)
+      model_preferences = validate_model_preferences(sketchup_model)
+      Immutable::Hash.new(
+        {
+          user: user_preferences,
+          model: model_preferences
+        }
+      )
+    end
+
+    # Whether row data is complete with preference or not.
+    # It is useful for backward compatibility, when we add new preferences it should be reset when user initialize it.
+    def self.data_complete?(row_data)
+      return false if row_data.empty?
+
+      data = JSON.parse(row_data.first.first)
+      return false if data['dark_theme'].nil? || data['diffing'].nil? || data['register_speckle_entity'].nil?
+
+      true
+    end
+
+    # Validates current preferences. If there are incomplete data then this method resets it with default preferences.
+    # @param database [Sqlite3::Database] database for queries.
+    # rubocop:disable Metrics/MethodLength
+    def self.validate_user_preferences(database)
+      row_data = database.exec("SELECT content FROM 'objects' WHERE hash = 'configSketchup'")
+      is_config_sketchup_exist = !row_data.empty?
+      is_data_complete = data_complete?(row_data)
+      if !is_config_sketchup_exist || !is_data_complete
+        if is_config_sketchup_exist
+          unless is_data_complete
+            # Update table with default preferences
+            database.exec("UPDATE 'objects' SET content = '#{DEFAULT_PREFERENCES}' WHERE hash = 'configSketchup'")
+          end
+        else
+          # Insert configSketchup completely to objects.
+          database.exec("INSERT INTO 'objects' VALUES #{DEFAULT_CONFIG}")
+        end
+      end
+
+      # Select data
+      row_data = database.exec("SELECT content FROM 'objects' WHERE hash = 'configSketchup'").first.first
+      # Parse string to hash
+      data_hash = JSON.parse(row_data).to_h
+      # Get current theme value
+      dark_theme = data_hash['dark_theme']
+      diffing = data_hash['diffing']
+      register_speckle_entity = data_hash['register_speckle_entity']
+
+      {
+        dark_theme: dark_theme,
+        diffing: diffing,
+        register_speckle_entity: register_speckle_entity
+      }.freeze
+    end
+    # rubocop:enable Metrics/MethodLength
+
+    # @param sketchup_model [Sketchup::Model] sketchup model to validate model preferences
+    def self.validate_model_preferences(sketchup_model)
+      speckle_dictionary = sketchup_model.attribute_dictionary('Speckle')
+      if speckle_dictionary.nil?
+        DICT_HANDLER.write_initial_model_data(sketchup_model, DEFAULT_MODEL_PREFERENCES)
+        return DEFAULT_MODEL_PREFERENCES
+      end
+
+      DEFAULT_MODEL_PREFERENCES.collect do |pref_key, default_value|
+        pref_value = DICT_HANDLER.get_attribute(
+          sketchup_model,
+          pref_key,
+          'Speckle'
+        )
+        DICT_HANDLER.set_attribute(sketchup_model, pref_key, default_value, 'Speckle') if pref_value.nil?
+        pref_value.nil? ? [pref_key, default_value] : [pref_key, pref_value]
+      end.to_h
+    end
+  end
+end

speckle_connector/src/relations/many_to_one_relation.rb

@@ -8,6 +8,8 @@ module SpeckleConnector
     # `A has child B` is Many to One relationship. Each person can have only one parent,
     # but one parent can have several children.
     class ManyToOneRelation
+      attr_reader :parent_table, :children_table
+
       # @param child [Object] the child element in the relation to look for parent
       # @return [Object] the parent element that is in relation with the child
       # @return [nil] if the child element is not in the relation with any elements

speckle_connector/src/sketchup_model/definitions/definitions.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Definitions to store for entities.
+    class Definitions
+      def self.from_sketchup_model(model)
+        definitions = model.definitions
+        definitions = definitions.select do |definition|
+          !definition.attribute_dictionaries.nil? &&
+            definition.attribute_dictionaries.any? { |dict| dict.name == SPECKLE_BASE_OBJECT }
+        end
+        Definitions.new(definitions)
+      end
+
+      def add_definition(definition)
+        old_definition = @definitions_by_guid[definition.guid]
+        return self if definition == old_definition
+
+        new_definitions = @definitions.append(definition)
+        Definitions.new(new_definitions)
+      end
+
+      def initialize(definitions = [])
+        @definitions = definitions
+        @definitions_by_name = definitions.collect do |definition|
+          [definition.name, definition]
+        end.to_h.freeze
+        @definitions_by_guid = definitions.collect do |definition|
+          [definition.guid, definition]
+        end.to_h.freeze
+        freeze
+      end
+
+      def by_guid(guid)
+        @definitions_by_guid[guid]
+      end
+
+      def by_name(name)
+        @definitions_by_name[name]
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/dictionary/dictionary_handler.rb

@@ -9,6 +9,57 @@ module SpeckleConnector
       class DictionaryHandler
         DICTIONARY_NAME = 'Speckle_Base_Object'
 
+        IGNORED_DICTIONARY_NAMES = [
+          DICTIONARY_NAME,
+          'IFC 4',
+          'IFC 2x3'
+        ].freeze
+
+        # @param entity [Sketchup::Entity] entity to get attribute dictionaries
+        def self.attribute_dictionaries_to_speckle(entity)
+          dictionaries = {}
+          return dictionaries if entity.attribute_dictionaries.nil?
+
+          entity.attribute_dictionaries.each do |att_dict|
+            dict_name = att_dict == '' ? 'empty_dictionary_name' : att_dict.name
+            dictionaries[dict_name] = att_dict.to_h unless IGNORED_DICTIONARY_NAMES.include?(att_dict.name)
+          end
+          dictionaries
+        end
+
+        # @param entity [Sketchup::Entity] entity to set attribute dictionaries
+        # rubocop:disable Metrics/CyclomaticComplexity
+        def self.attribute_dictionaries_to_native(entity, dictionaries)
+          return if dictionaries.nil?
+
+          classification_to_native(entity, dictionaries) if entity.is_a?(Sketchup::ComponentDefinition)
+
+          dictionaries.each do |dict_name, entries|
+            next unless entries.is_a?(Hash)
+
+            dict_name = dict_name == 'empty_dictionary_name' ? '' : dict_name
+            entries.each do |key, value|
+              set_attribute(entity, key, value, dict_name)
+            rescue StandardError => e
+              puts("Failed to write key: #{key} value: #{value} to dictionary #{dict_name}")
+              puts(e)
+            end
+          end
+        end
+        # rubocop:enable Metrics/CyclomaticComplexity
+
+        # Classification is ComponentDefinition specific, so they can be added only definition by add_classification
+        # method.
+        # @param definition_entity [Sketchup::ComponentDefinition] definition to add callback
+        def self.classification_to_native(definition_entity, dictionaries)
+          applied_schema_types = dictionaries['AppliedSchemaTypes']
+          return if applied_schema_types.nil?
+
+          applied_schema_types.each do |key, value|
+            definition_entity.add_classification(key, value)
+          end
+        end
+
         # @param entity [Sketchup::Entity] the sketchup entity of Speckle object
         # @param key [Symbol] the name of the attribute
         # @param dictionary_name [String, Symbol] the name of the attribute dictionary

speckle_connector/src/sketchup_model/dictionary/speckle_entity_dictionary_handler.rb

@@ -11,16 +11,21 @@ module SpeckleConnector
       class SpeckleEntityDictionaryHandler < DictionaryHandler
         # Writes initial data while speckle entity is creating first time.
         # @param sketchup_entity [Sketchup::Entity] Sketchup entity to write data into it's attribute dictionary.
-        def self.write_initial_base_data(sketchup_entity)
+        # rubocop:disable Metrics/ParameterLists
+        def self.write_initial_base_data(sketchup_entity, application_id, id, speckle_type, children, stream_id)
           initial_dict_data = {
             # Add here more if you want to write here initial data
-            SPECKLE_ID => '',
-            SPECKLE_TYPE => BASE_OBJECT,
-            APPLICATION_ID => '',
-            TOTAL_CHILDREN_COUNT => 0
+            SPECKLE_ID => id,
+            APPLICATION_ID => application_id,
+            SPECKLE_TYPE => speckle_type,
+            TOTAL_CHILDREN_COUNT => children.length,
+            CHILDREN => children,
+            VALID_STREAM_IDS => [stream_id],
+            INVALID_STREAM_IDS => []
           }
           set_hash(sketchup_entity, initial_dict_data)
         end
+        # rubocop:enable Metrics/ParameterLists
       end
     end
   end

speckle_connector/src/sketchup_model/dictionary/speckle_model_dictionary_handler.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require_relative 'dictionary_handler'
+require_relative '../../constants/dict_constants'
+require_relative '../../constants/type_constants'
+
+module SpeckleConnector
+  module SketchupModel
+    module Dictionary
+      # Dictionary handler of the speckle model.
+      class SpeckleModelDictionaryHandler < DictionaryHandler
+        DICTIONARY_NAME = 'Speckle'
+        # Writes initial data while speckle entity is creating first time.
+        # @param sketchup_model [Sketchup::Model] Sketchup model to write data into it's attribute dictionary.
+        def self.write_initial_model_data(sketchup_model, default_preferences)
+          set_hash(sketchup_model, default_preferences, DICTIONARY_NAME)
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/materials/materials.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require_relative '../../constants/mat_constants'
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Materials to store for entities.
+    class Materials
+      def self.from_sketchup_model(model)
+        materials = model.materials
+        materials = materials.select do |material|
+          !material.attribute_dictionaries.nil? &&
+            material.attribute_dictionaries.any? { |dict| dict.name == MAT_DICTIONARY }
+        end
+        mat_hash = materials.collect { |material| [material.get_attribute(MAT_DICTIONARY, MAT_ID), material] }.to_h
+        Materials.new(mat_hash)
+      end
+
+      def initialize(material_hash = {})
+        @materials_by_id = material_hash.freeze
+        @id_by_materials = material_hash.collect { |id, material| [material, id] }.to_h.freeze
+        freeze
+      end
+
+      def add_material(id, material)
+        old_material = @materials_by_id[id.to_sym]
+        return self if material == old_material
+
+        new_material_hash = @materials_by_id.merge({ id.to_sym => material })
+        Materials.new(new_material_hash)
+      end
+
+      def by_id(id)
+        @materials_by_id[id.to_sym]
+      end
+
+      def material_id(material)
+        @id_by_materials[material]
+      end
+
+      def add_speckle_material
+        @materials_by_id[MAT_ADD]
+      end
+
+      def edit_speckle_material
+        @materials_by_id[MAT_EDIT]
+      end
+
+      def remove_speckle_material
+        @materials_by_id[MAT_REMOVE]
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/reader/speckle_entities_reader.rb

@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require_relative '../../speckle_entities/speckle_entity'
+require_relative '../../constants/dict_constants'
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Reader model for sketchup model.
+    module Reader
+      # Reader module for speckle entities.
+      module SpeckleEntitiesReader
+        # @param entities [Sketchup::Entities] entities to collect speckle entities.
+        def self.read(entities)
+          speckle_entities = {}
+          entities.each do |entity|
+            speckle_entities[entity.persistent_id] = read_speckle_entity(entity) if speckle_entity?(entity)
+            next unless entity.is_a?(Sketchup::Group) || entity.is_a?(Sketchup::ComponentInstance)
+
+            if speckle_entity?(entity.definition)
+              speckle_entities[entity.definition.persistent_id] = read_speckle_entity(entity.definition)
+            end
+            definition_speckle_entities = read(entity.definition.entities)
+            speckle_entities = speckle_entities.merge(definition_speckle_entities)
+          end
+          speckle_entities
+        end
+
+        # @param entity [Sketchup::Entity] sketchup entity to read from attribute dictionary.
+        def self.read_speckle_entity(entity)
+          dict = entity.attribute_dictionaries.to_a.find { |d| d.name == SPECKLE_BASE_OBJECT }
+          speckle_id = dict[:speckle_id]
+          application_id = dict[:application_id]
+          speckle_type = dict[:speckle_type]
+          children = dict[:children]
+          valid_stream_ids = dict[:valid_stream_ids]
+          invalid_stream_ids = dict[:invalid_stream_ids]
+          SpeckleEntities::SpeckleEntity.new(entity, speckle_id, application_id, speckle_type, children,
+                                             valid_stream_ids, invalid_stream_ids)
+        end
+
+        # @param entity [Sketchup::Entity] sketchup entity to check if it was speckle entity once.
+        def self.speckle_entity?(entity)
+          return false if entity.attribute_dictionaries.nil?
+          return false if entity.attribute_dictionaries.to_a.empty?
+
+          entity.attribute_dictionaries.to_a.any? { |dict| dict.name == SPECKLE_BASE_OBJECT }
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/utils/face_utils.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Works directly with/on SketchUp Entities of different kinds (Groups, Faces, Edges, ...).
+    module Utils
+      # Static methods that work directly with Sketchup::Face objects
+      class FaceUtils
+        # A method that calculates the faces that are less than n-faces
+        # away from the current face. For n=1, you would get the
+        # neighbouring faces.
+        # @param edge_ary [Array<Sketchup::Edge>] the edges to look for n-adjacent faces
+        # @param n_adjacent [Integer] the distance from the edges (in number of faces)
+        # @return [Array<Sketchup::Face>] the faces that are n faces away from the given edges
+        def self.near_faces(edges_ary, n_adjacent = 1)
+          # get all the faces that are not more than a face away to the current face.
+          edges_ary = edges_ary.select(&:valid?)
+          adj_faces = []
+          n_adjacent.times do |_i|
+            new_faces = edges_ary.collect(&:faces).flatten.uniq
+            adj_faces += new_faces
+            edges_ary = new_faces.collect(&:edges).flatten.uniq - edges_ary
+          end
+          adj_faces.uniq
+        end
+      end
+    end
+  end
+end

speckle_connector/src/sketchup_model/utils/plane_utils.rb

@@ -0,0 +1,89 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  # Operations related to {SketchupModel}.
+  module SketchupModel
+    # Works directly with/on SketchUp Entities of different kinds (Groups, Faces, Edges, ...).
+    module Utils
+      # Static methods to do plane calculations with sketchup geom objects like Point3d and Vector3d.
+      class Plane
+        ORTHOGONAL_TOLERANCE = 1e-5
+        LENGTH_TOLERANCE = 1e-8
+
+        # Create plane from 3 points
+        # @param origin [Geom::Point3d] the point on the plane that wil become the origin of the local coordinate system
+        # @param point_1 [Geom::Point3d] the point that defines first direction
+        # @param point_2 [Geom::Point3d] the third point on the plane
+        # @return [Plane] the parametrization of the plane that goes through the given points
+        def self.from_points(origin, point_1, point_2)
+          direction_x = origin.vector_to(point_1).normalize
+          direction_x = direction_x.normalize
+          normal = direction_x.cross(origin.vector_to(point_2))
+          direction_y = direction_x.cross(normal.normalize)
+          new(origin: origin, direction_u: direction_x, direction_v: direction_y)
+        end
+
+        # @return [Geom::Vector3d] the direction of the u-axis on the plane
+        attr_reader :direction_u
+
+        # @return [Geom::Vector3d] the direction of the v-axis on the plane
+        attr_reader :direction_v
+
+        # @return [Geom::Point3d] the origin of the local coordinate system on the plane
+        attr_reader :origin
+
+        # @param origin [Geom::Point3d] the origin of the coordinate system on the plane
+        # @param direction_u [Geom::Vector3d] the direction of the x-axis
+        # @param direction_v [Geom::Vector3d] the direction of the y-axis
+        def initialize(origin:, direction_u:, direction_v:)
+          @origin = origin
+          raise ArgumentError, 'directions must me orthogonal' if direction_u.dot(direction_v) > ORTHOGONAL_TOLERANCE
+          raise ArgumentError, 'directions must be of length 1' if (direction_u.length - 1).abs > LENGTH_TOLERANCE
+          raise ArgumentError, 'directions must be of length 1' if (direction_v.length - 1).abs > LENGTH_TOLERANCE
+
+          @direction_u = direction_u
+          @direction_v = direction_v
+        end
+
+        # Get the point object in global coordinates for the point on the plane with local coordinates (u,v).
+        # @param coordinate_u [Float] the u-coordinate on the plane
+        # @param coordinate_v [Float] the v-coordinate on the plane
+        # @return [Geom::Point3d] the point in space that corresponds to the given (u, v) coordinates
+        def point_at(coordinate_u, coordinate_v)
+          scaled_direction_u = Geom::Vector3d.new(direction_u.x * coordinate_u,
+                                                  direction_u.y * coordinate_u,
+                                                  direction_u.z * coordinate_u)
+          scaled_direction_v = Geom::Vector3d.new(direction_v.x * coordinate_v,
+                                                  direction_v.y * coordinate_v,
+                                                  direction_v.z * coordinate_v)
+          origin + scaled_direction_u + scaled_direction_v
+        end
+
+        # Find local (u, v) coordinates of the projection of the given point to the plane
+        # @param point [Geom::Point3d] the point that will be projected to the plane
+        # @return [(Float, Float)] the local coordinates on the plane that correspond to the projected point
+        def plane_coordinates(point)
+          origin_to_point = origin.vector_to(point)
+          coordinate_u = origin_to_point.dot(direction_u)
+          coordinate_v = origin_to_point.dot(direction_v)
+          [coordinate_u, coordinate_v]
+        end
+
+        # Project a given point to the plane
+        # @param point [Geom::Point3d] the point that will be projected to the plane
+        # @return [Geom::Point3d] the projected point on the plane
+        def project_to_plane(point)
+          coordinate_u, coordinate_v = plane_coordinates(point)
+          point_at(coordinate_u, coordinate_v)
+        end
+
+        # Check if the given point lies on the plane
+        # @param point [Geom::Point3d] the point to check
+        # @return [Boolean] whether the point lies on the plane
+        def on_plane?(point)
+          point.distance(project_to_plane(point)).to_m < LENGTH_TOLERANCE
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_entities/speckle_base_entity.rb

@@ -1,38 +0,0 @@
-# frozen_string_literal: true
-
-require_relative '../immutable/immutable'
-require_relative '../convertors/units'
-require_relative '../speckle_objects/base'
-require_relative '../speckle_entities/speckle_line_entity'
-require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
-
-module SpeckleConnector
-  module SpeckleEntities
-    # Speckle base entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    class SpeckleBaseEntity
-      include Immutable::ImmutableUtils
-      # @return [Sketchup::Entity] sketchup entity represents {SpeckleEntity} on the model.
-      attr_reader :sketchup_entity
-
-      # @return [SpeckleObjects::Base] speckle object that represented on server.
-      attr_reader :speckle_object
-
-      # @return [Integer] application id of the sketchup entity.
-      attr_reader :application_id
-
-      # @param sketchup_entity [Sketchup::Entity] sketchup entity represents {SpeckleEntity} on the model.
-      def initialize(sketchup_model, sketchup_entity)
-        @sketchup_entity = sketchup_entity
-        @application_id = @sketchup_entity.persistent_id
-        @speckle_object = SpeckleObjects::Base.new
-        su_unit = sketchup_model.options['UnitsOptions']['LengthUnit']
-        @units =  Converters::SKETCHUP_UNITS[su_unit]
-        SketchupModel::Dictionary::SpeckleEntityDictionaryHandler.write_initial_base_data(@sketchup_entity)
-      end
-
-      def valid?
-        sketchup_entity.valid?
-      end
-    end
-  end
-end

speckle_connector/src/speckle_entities/speckle_entity.rb

@@ -1,19 +1,123 @@
 # frozen_string_literal: true
 
-require_relative '../speckle_entities/speckle_line_entity'
+require_relative 'speckle_entity_status'
+require_relative '../immutable/immutable'
+require_relative '../convertors/units'
+require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
 
 module SpeckleConnector
   module SpeckleEntities
-    # Speckle entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    module SpeckleEntity
-      def self.with_converted(skp_model, skp_entity)
-        # return the same object if it is already SpeckleEntity
-        return skp_entity if skp_entity.is_a?(SpeckleEntity)
-        return SpeckleBlockEntity.new(skp_model, skp_entity) if skp_entity.is_a?(Sketchup::Group)
-        return SpeckleBlockEntity.new(skp_model, skp_entity) if skp_entity.is_a?(Sketchup::ComponentInstance)
-        return SpeckleMeshEntity.new(skp_model, skp_entity) if skp_entity.is_a?(Sketchup::Face)
+    # Speckle base entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
+    class SpeckleEntity
+      include Immutable::ImmutableUtils
+      # @return [Sketchup::Entity] Sketchup Entity represents {SpeckleEntity} on the model.
+      attr_reader :sketchup_entity
 
-        SpeckleLineEntity.new(skp_model, skp_entity) if skp_entity.is_a?(Sketchup::Edge)
+      # @return [String] Speckle object type.
+      attr_reader :speckle_type
+
+      # @return [Integer] application id of the Sketchup Entity.
+      attr_reader :application_id
+
+      # @return [String] id of the Speckle Base Object
+      attr_reader :id
+
+      # @return [Integer] total children count of the Speckle Base Object
+      attr_reader :total_children_count
+
+      # @return [Hash{String=>SpeckleObjects::Base}] Speckle objects belongs to edge
+      attr_reader :speckle_children_objects
+
+      # @return [Array<String>] speckle entity that valid on streams
+      attr_reader :valid_stream_ids
+
+      # @return [Array<String>] speckle entity that invalid on streams
+      attr_reader :invalid_stream_ids
+
+      # @return [SpeckleEntityStatus] current status of the Speckle Entity.
+      attr_reader :status
+
+      attr_reader :source_material, :active_diffing_stream_id
+
+      # @param sketchup_entity [Sketchup::Entity] sketchup entity represents {SpeckleEntity} on the model.
+      # rubocop:disable Metrics/ParameterLists
+      def initialize(sketchup_entity, speckle_id, application_id, speckle_type, children, valid_stream_ids,
+                     invalid_stream_ids = [])
+        @status = SpeckleEntityStatus::UP_TO_DATE
+        @source_material = sketchup_entity.material
+        @active_diffing_stream_id = nil
+        @valid_stream_ids = valid_stream_ids
+        @invalid_stream_ids = invalid_stream_ids
+        @sketchup_entity = sketchup_entity
+        @application_id = application_id
+        @id = speckle_id
+        @total_children_count = children.length
+        @speckle_type = speckle_type
+        @speckle_children_objects = children
+      end
+      # rubocop:enable Metrics/ParameterLists
+
+      def write_initial_base_data
+        SketchupModel::Dictionary::SpeckleEntityDictionaryHandler
+          .write_initial_base_data(@sketchup_entity, application_id, id, speckle_type,
+                                   @speckle_children_objects, valid_stream_ids.first)
+      end
+
+      def with_up_to_date
+        with(:@status => SpeckleEntityStatus::UP_TO_DATE)
+      end
+
+      def with_invalid
+        valid = valid_stream_ids
+        sketchup_entity.set_attribute(SPECKLE_BASE_OBJECT, VALID_STREAM_IDS, [])
+        sketchup_entity.set_attribute(SPECKLE_BASE_OBJECT, INVALID_STREAM_IDS, valid)
+        with(:@valid_stream_ids => [], :@invalid_stream_ids => valid)
+      end
+
+      def activate_diffing(stream_id, material)
+        sketchup_entity.material = material
+        with(:@active_diffing_stream_id => stream_id)
+      end
+
+      def deactivate_diffing
+        sketchup_entity.material = @source_material
+        with(:@active_diffing_stream_id => nil)
+      end
+
+      def change_material(material)
+        sketchup_entity.material = material
+      end
+
+      def revert_material
+        sketchup_entity.material = source_material
+      end
+
+      def with_valid_stream_id(stream_id)
+        return self if valid_stream_ids.include?(stream_id)
+
+        invalid_ids = @invalid_stream_ids.include?(stream_id) ? @invalid_stream_ids - [stream_id] : @invalid_stream_ids
+        valid_ids = valid_stream_ids + [stream_id]
+        sketchup_entity.set_attribute(SPECKLE_BASE_OBJECT, VALID_STREAM_IDS, valid_ids)
+        sketchup_entity.set_attribute(SPECKLE_BASE_OBJECT, INVALID_STREAM_IDS, invalid_ids)
+
+        # if sketchup_entity.is_a?(Sketchup::Group) || sketchup_entity.is_a?(Sketchup::ComponentInstance)
+        #   sketchup_entity.definition.set_attribute(SPECKLE_BASE_OBJECT, VALID_STREAM_IDS, valid_ids)
+        #   sketchup_entity.definition.set_attribute(SPECKLE_BASE_OBJECT, INVALID_STREAM_IDS, invalid_ids)
+        # end
+
+        with(:@valid_stream_ids => @valid_stream_ids + [stream_id], :@invalid_stream_ids => invalid_ids)
+      end
+
+      def with_edited
+        with(:@status => SpeckleEntityStatus::EDITED)
+      end
+
+      def with_removed
+        with(:@status => SpeckleEntityStatus::REMOVED)
+      end
+
+      def valid?
+        sketchup_entity.valid?
       end
     end
   end

speckle_connector/src/speckle_entities/speckle_entity_status.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require_relative '../immutable/immutable'
+require_relative '../convertors/units'
+require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleEntities
+    module SpeckleEntityStatus
+      # Speckle Entity created first time with {Sketchup::Entity} before sent to server.
+      UP_TO_DATE = 0
+      # {Sketchup::Entity} that corresponds to Speckle Entity is edited after created by user.
+      EDITED = 1
+      # {Sketchup::Entity} that corresponds to Speckle Entity is removed.
+      REMOVED = 2
+    end
+  end
+end

speckle_connector/src/speckle_entities/speckle_line_entity.rb

@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'speckle_base_entity'
-require_relative '../immutable/immutable'
-require_relative '../speckle_objects/geometry/line'
-require_relative '../sketchup_model/dictionary/speckle_entity_dictionary_handler'
-
-module SpeckleConnector
-  module SpeckleEntities
-    # Speckle line entity is the state object for Sketchup::Entity and it's converted (or not yet) state.
-    class SpeckleLineEntity < SpeckleBaseEntity
-      include Immutable::ImmutableUtils
-
-      # @return [SpeckleObjects::Geometry::Line] speckle line object
-      attr_reader :speckle_object
-
-      def initialize(sketchup_model, sketchup_edge)
-        super(sketchup_model, sketchup_edge)
-        @speckle_object = SpeckleObjects::Geometry::Line.from_edge(sketchup_edge, units)
-      end
-
-      alias sketchup_edge sketchup_entity
-    end
-  end
-end

speckle_connector/src/speckle_objects/built_elements/view3d.rb

@@ -0,0 +1,119 @@
+# frozen_string_literal: true
+
+require_relative '../base'
+require_relative '../../constants/type_constants'
+require_relative '../../speckle_objects/geometry/point'
+require_relative '../../speckle_objects/geometry/vector'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module BuiltElements
+      # View3d object represents scenes on Sketchup.
+      class View3d < Base
+        SPECKLE_TYPE = OBJECTS_BUILTELEMENTS_VIEW3D
+
+        # @param name [String] name of the scene
+        # @param origin [SpeckleObjects::Geometry::Point] origin (eye) of the view.
+        # @param target [SpeckleObjects::Geometry::Point] target of the view.
+        # @param direction [SpeckleObjects::Geometry::Vector] direction of the view from eye to target.
+        # @param up_direction [SpeckleObjects::Geometry::Vector] up direction of the view.
+        # @param is_perspective [Boolean] whether view is perspective or not.
+        # @param lens [Boolean] fov value of the view camera.
+        # @param units [String] units of the camera.
+        # @param application_id [String] application_id of the view.
+        # @param update_properties [Hash{Symbol=>boolean}] properties of the view.
+        # @param rendering_options [Hash{Symbol=>boolean}] rendering options of the view.
+        # rubocop:disable Metrics/ParameterLists
+        def initialize(name, origin, target, direction, up_direction,
+                       is_perspective, lens, units, application_id, update_properties, rendering_options)
+          super(
+            speckle_type: SPECKLE_TYPE,
+            total_children_count: 0,
+            application_id: application_id,
+            id: nil
+          )
+          self[:name] = name
+          self[:origin] = origin
+          self[:target] = target
+          self[:forwardDirection] = direction
+          self[:upDirection] = up_direction
+          self[:isOrthogonal] = !is_perspective
+          self[:lens] = lens
+          self[:units] = units
+          self[:update_properties] = update_properties
+          self[:rendering_options] = rendering_options
+        end
+        # rubocop:enable Metrics/ParameterLists
+
+        # @param obj [Hash] commit object.
+        # @param sketchup_model [Sketchup::Model] active sketchup model.
+        # rubocop:disable Metrics/AbcSize
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/MethodLength
+        def self.to_native(obj, sketchup_model)
+          views = collect_views(obj)
+          return if views.empty?
+
+          views.each do |view|
+            next unless view['speckle_type'] == 'Objects.BuiltElements.View:Objects.BuiltElements.View3D'
+
+            name = view['name'] || view['id']
+            next if sketchup_model.pages.any? { |page| page.name == name }
+
+            origin = view['origin']
+            target = view['target']
+            lens = view['lens'] || 50
+            origin = SpeckleObjects::Geometry::Point.to_native(origin['x'], origin['y'], origin['z'], origin['units'])
+            target = SpeckleObjects::Geometry::Point.to_native(target['x'], target['y'], target['z'], target['units'])
+            # Set camera position before creating scene on it.
+            my_camera = Sketchup::Camera.new(origin, target, [0, 0, 1], !view['isOrthogonal'], lens)
+            sketchup_model.active_view.camera = my_camera
+            sketchup_model.pages.add(name)
+            page = sketchup_model.pages[name]
+            set_page_update_properties(page, view['update_properties']) if view['update_properties']
+            set_rendering_options(page.rendering_options, view['rendering_options']) if view['rendering_options']
+          rescue StandardError => e
+            puts("Failed to convert view (name: #{name})")
+            puts(e)
+          end
+        end
+        # rubocop:enable Metrics/AbcSize
+        # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/MethodLength
+
+        # @param page [Sketchup::Page] scene to update -update properties-
+        def self.set_page_update_properties(page, update_properties)
+          update_properties.each do |prop, value|
+            page.instance_variable_set(:"@#{prop}", value)
+          end
+        end
+
+        # @param rendering_options [Sketchup::RenderingOptions] rendering options of scene (page)
+        def self.set_rendering_options(rendering_options, speckle_rendering_options)
+          speckle_rendering_options.each do |prop, value|
+            next if rendering_options[prop].nil?
+
+            rendering_options[prop] = if value.is_a?(Hash)
+                                        SpeckleObjects::Others::Color.to_native(value)
+                                      else
+                                        value
+                                      end
+          end
+        end
+
+        def self.collect_views(obj)
+          views = []
+          views += obj.filter_map do |_key, value|
+            if value.is_a?(Array) &&
+               value.any? { |v| v['speckle_type'] == OBJECTS_BUILTELEMENTS_VIEW3D }
+              value
+            end
+          end
+          views.flatten.select { |view| view['speckle_type'] == OBJECTS_BUILTELEMENTS_VIEW3D }
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/geometry/line.rb

@@ -5,6 +5,7 @@ require_relative 'point'
 require_relative 'bounding_box'
 require_relative '../base'
 require_relative '../primitive/interval'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -20,7 +21,7 @@ module SpeckleConnector
         # @param units [String] units of the speckle line.
         # @param application_id [String, nil] entity id of the {Sketchup::Edge} that represents to the speckle line.
         # rubocop:disable Metrics/ParameterLists
-        def initialize(start_pt:, end_pt:, domain:, bbox:, units:, application_id: nil)
+        def initialize(start_pt:, end_pt:, domain:, bbox:, units:, sketchup_attributes: {}, application_id: nil)
           super(
               speckle_type: 'Objects.Geometry.Line',
               total_children_count: 0,
@@ -32,11 +33,17 @@ module SpeckleConnector
           self[:domain] = domain
           self[:bbox] = bbox
           self[:units] = units
+          self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
         end
         # rubocop:enable Metrics/ParameterLists
 
         # @param edge [Sketchup::Edge] edge to convert line.
-        def self.from_edge(edge, units)
+        def self.from_edge(edge, units, model_preferences)
+          dictionaries = {}
+          if model_preferences[:include_entity_attributes] && model_preferences[:include_edge_entity_attributes]
+            dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(edge)
+          end
+          att = dictionaries.any? ? { dictionaries: dictionaries } : {}
           start_pt = Geometry::Point.from_vertex(edge.start.position, units)
           end_pt = Geometry::Point.from_vertex(edge.end.position, units)
           domain = Primitive::Interval.from_numeric(0, Float(edge.length), units)
@@ -46,16 +53,18 @@ module SpeckleConnector
             end_pt: end_pt,
             domain: domain,
             bbox: bbox,
-            application_id: edge.persistent_id.to_s,
-            units: units
+            units: units,
+            sketchup_attributes: att,
+            application_id: edge.persistent_id.to_s
           )
         end
 
+        # @param _state [States::State] state of the application.
         # @param line [Object] object represents Speckle line.
         # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
         # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
         # rubocop:disable Metrics/AbcSize
-        def self.to_native(line, layer, entities)
+        def self.to_native(state, line, layer, entities, &_convert_to_native)
           if line.key?('value')
             values = line['value']
             points = values.each_slice(3).to_a.map { |pt| Point.to_native(pt[0], pt[1], pt[2], line['units']) }
@@ -66,7 +75,14 @@ module SpeckleConnector
             end_pt = Point.to_native(line['end']['x'], line['end']['y'], line['end']['z'], line['units'])
             edges = entities.add_edges(start_pt, end_pt)
           end
-          edges.each { |edge| edge.layer = layer }
+          edges.each do |edge|
+            edge.layer = layer
+            unless line['sketchup_attributes'].nil?
+              SketchupModel::Dictionary::DictionaryHandler
+                .attribute_dictionaries_to_native(edge, line['sketchup_attributes']['dictionaries'])
+            end
+          end
+          return state, edges
         end
         # rubocop:enable Metrics/AbcSize
 

speckle_connector/src/speckle_objects/geometry/mesh.rb

@@ -4,6 +4,8 @@ require_relative '../base'
 require_relative '../geometry/bounding_box'
 require_relative '../other/render_material'
 require_relative '../../convertors/clean_up'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
+require_relative '../../sketchup_model/utils/plane_utils'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -13,35 +15,68 @@ module SpeckleConnector
       class Mesh < Base
         SPECKLE_TYPE = 'Objects.Geometry.Mesh'
 
+        # @return [Array<Geom::Point3d>] points that construct mesh.
+        attr_accessor :vertices
+
+        # @return [Array] polygons
+        attr_accessor :polygons
+
+        # @return [String] speckle units.
+        attr_reader :units
+
         # @param units [String] units of the speckle mesh.
         # @param render_material [Other::RenderMaterial, nil] render material of the speckle mesh.
-        # @param bbox [Geometry::BoundingBox] bounding box speckle object of the speckle mesh.
         # @param vertices [Array] vertices of the speckle mesh.
         # @param faces [Array] faces of the speckle mesh.
-        # @param face_edge_flags [Array] face edge flags of the speckle mesh.
         # @param sketchup_attributes [Hash] additional information about speckle mesh.
         # rubocop:disable Metrics/ParameterLists
-        def initialize(units:, render_material:, bbox:, vertices:, faces:, face_edge_flags:, sketchup_attributes:)
+        def initialize(units:, render_material:, vertices:, faces:, sketchup_attributes:, application_id: nil)
           super(
             speckle_type: SPECKLE_TYPE,
             total_children_count: 0,
-            application_id: nil,
+            application_id: application_id,
             id: nil
           )
+          @vertices = []
+          @polygons = []
+          @units = units
           self[:units] = units
           self[:renderMaterial] = render_material
-          self[:bbox] = bbox
+          # self[:bbox] = bbox
           self[:'@(31250)vertices'] = vertices
           self[:'@(62500)faces'] = faces
-          self[:'@(31250)faceEdgeFlags'] = face_edge_flags
-          self[:sketchup_attributes] = sketchup_attributes
+          self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
         end
         # rubocop:enable Metrics/ParameterLists
 
+        # Checks 4 points are planar or not.
+        def self.check_4_points_planar(points)
+          plane = SketchupModel::Utils::Plane.from_points(points[0], points[1], points[2])
+          plane.on_plane?(points[3])
+        end
+
+        # Add quad mesh to sketchup native mesh by checking planarity.
+        # @param native_mesh [Geom::Mesh] sketchup mesh to convert them later faces.
+        # @param polygon_points [Array<Geom::Point3d>] sketchup points to add them with polygon to mesh.
+        def self.add_quad_mesh(native_mesh, polygon_points)
+          is_planar = check_4_points_planar(polygon_points)
+          if is_planar
+            native_mesh.add_polygon(polygon_points)
+          else
+            native_mesh.add_polygon([polygon_points[0], polygon_points[1], polygon_points[2]])
+            native_mesh.add_polygon([polygon_points[0], polygon_points[2], polygon_points[3]])
+          end
+        end
+
         # @param entities [Sketchup::Entities] entities to add
-        def self.to_native(sketchup_model, mesh, layer, entities)
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/AbcSize
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/PerceivedComplexity:
+        def self.to_native(state, mesh, layer, entities, &convert_to_native)
+          model_preferences = state.user_state.preferences[:model]
           # Get soft? flag of {Sketchup::Edge} object to understand smoothness of edge.
-          is_soften = get_soften_setting(mesh)
+          is_soften = get_soften_setting(mesh, entities)
           smooth_flags = is_soften ? 4 : 1
           # Get native points to add polygon into native mesh.
           points = get_native_points(mesh)
@@ -53,37 +88,84 @@ module SpeckleConnector
             # 0 -> 3, 1 -> 4 to preserve backwards compatibility
             num_pts += 3 if num_pts < 3
             indices = faces.shift(num_pts)
-            native_mesh.add_polygon(indices.map { |index| points[index] })
+            polygon_points = indices.map { |index| points[index] }
+            # Quad mesh
+            if num_pts == 4
+              add_quad_mesh(native_mesh, polygon_points)
+            else
+              native_mesh.add_polygon(polygon_points)
+            end
           end
-          material = Other::RenderMaterial.to_native(sketchup_model, mesh['renderMaterial'])
-          entities.add_faces_from_mesh(native_mesh, smooth_flags, material)
+          state, _materials = Other::RenderMaterial.to_native(state, mesh['renderMaterial'],
+                                                              layer, entities, &convert_to_native)
+          # Find and assign material if exist
+          unless mesh['renderMaterial'].nil?
+            material_name = mesh['renderMaterial']['name'] || mesh['renderMaterial']['id']
+            # Retrieve material from state
+            material = state.sketchup_state.materials.by_id(material_name)
+          end
+
+          # Add faces from mesh with material and smooth setting
+          entities.add_faces_from_mesh(native_mesh, smooth_flags, material, material)
           added_faces = entities.grep(Sketchup::Face).last(native_mesh.polygons.length)
-          added_faces.each { |face| face.layer = layer }
+          added_faces.each do |face|
+            face.layer = layer
+            # Smooth edges if they already soft
+            face.edges.each { |edge| edge.smooth = true if edge.soft? }
+            unless mesh['sketchup_attributes'].nil?
+              SketchupModel::Dictionary::DictionaryHandler
+                .attribute_dictionaries_to_native(face, mesh['sketchup_attributes']['dictionaries'])
+            end
+          end
           # Merge only added faces in this scope
-          Converters::CleanUp.merge_coplanar_faces(added_faces)
-          native_mesh
+          if model_preferences[:merge_coplanar_faces]
+            added_faces = Converters::CleanUp.merge_coplanar_faces(added_faces)
+          end
+          return state, added_faces
         end
+        # rubocop:enable Metrics/MethodLength
+        # rubocop:enable Metrics/AbcSize
+        # rubocop:enable Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/PerceivedComplexity:
 
         # @param face [Sketchup::Face] face to convert mesh
-        def self.from_face(face, units)
-          mesh = face.loops.count > 1 ? face.mesh : nil
+        # rubocop:disable Style/MultilineTernaryOperator
+        # rubocop:disable Metrics/CyclomaticComplexity
+        def self.from_face(face, units, model_preferences)
+          dictionaries = {}
+          if model_preferences[:include_entity_attributes] && model_preferences[:include_face_entity_attributes]
+            dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(face)
+          end
           has_any_soften_edge = face.edges.any?(&:soft?)
-          Mesh.new(
+          att = dictionaries.any? ? { is_soften: has_any_soften_edge, dictionaries: dictionaries }
+                  : { is_soften: has_any_soften_edge }
+          speckle_mesh = Mesh.new(
             units: units,
-            render_material: face.material.nil? ? nil : Other::RenderMaterial.from_material(face.material),
-            bbox: Geometry::BoundingBox.from_bounds(face.bounds, units),
-            vertices: mesh.nil? ? face_vertices_to_array(face, units) : mesh_points_to_array(mesh, units),
-            faces: mesh.nil? ? face_indices_to_array(face, 0) : mesh_faces_to_array(mesh, -1),
-            face_edge_flags: mesh.nil? ? face_edge_flags_to_array(face) : mesh_edge_flags_to_array(mesh),
-            sketchup_attributes: { is_soften: has_any_soften_edge }
+            render_material: face.material.nil? && face.back_material.nil? ? nil : Other::RenderMaterial
+                                                          .from_material(face.material || face.back_material),
+            # bbox: Geometry::BoundingBox.from_bounds(face.bounds, units),
+            vertices: [],
+            faces: [],
+            sketchup_attributes: att,
+            application_id: face.persistent_id
           )
+          speckle_mesh.face_to_mesh(face)
+          speckle_mesh.update_mesh
+          speckle_mesh
+        end
+        # rubocop:enable Style/MultilineTernaryOperator
+        # rubocop:enable Metrics/CyclomaticComplexity
+
+        def face_to_mesh(face)
+          mesh = face.loops.count > 1 ? face.mesh : nil
+          mesh.nil? ? face_vertices_to_array(face) : mesh_points_to_array(mesh)
+          mesh.nil? ? face_indices_to_array(face) : mesh_faces_to_array(mesh)
         end
 
-        # get a flat array of vertices from a list of sketchup vertices
-        def self.face_vertices_to_array(face, units)
+        # Collects indexed Sketchup vertices into flat array for Speckle use.
+        def vertices_to_array(units)
           pts_array = []
-          face.vertices.each do |v|
-            pt = v.position
+          vertices.each do |pt|
             pts_array.push(Geometry.length_to_speckle(pt[0], units),
                            Geometry.length_to_speckle(pt[1], units),
                            Geometry.length_to_speckle(pt[2], units))
@@ -91,57 +173,77 @@ module SpeckleConnector
           pts_array
         end
 
-        # get a flat array of vertices from a sketchup polygon mesh
-        def self.mesh_points_to_array(mesh, units)
-          pts_array = []
+        def update_mesh
+          # puts "Vertex count on mesh #{vertices.length}"
+          self['@(31250)vertices'] = vertices_to_array(units)
+          self[:'@(62500)faces'] = polygons
+        end
+
+        # Get a flat array of vertices from a list of sketchup vertices
+        # @param face [Sketchup::Face] face to get vertices.
+        def face_vertices_to_array(face)
+          face.vertices.each do |v|
+            pt = v.position
+            # FIXME: Enable previous line when viewer supports shared vertices
+            # vertices.push(pt) unless vertices.any? { |point| point == pt }
+            vertices.push(pt)
+          end
+        end
+
+        # Get a flat array of face indices from a sketchup face
+        def face_indices_to_array(face)
+          polygons.push(face.vertices.count)
+          face.vertices.each do |v|
+            pt = v.position
+            # FIXME: Enable previous line when viewer supports shared vertices
+            # global_vertex_index = vertices.reverse.find_index(pt)
+            global_vertex_index = vertices.length - vertices.reverse.find_index(pt) - 1
+            polygons.push(global_vertex_index)
+          end
+        end
+
+        # Get a flat array of vertices from a sketchup polygon mesh
+        # @param mesh [Geom::PolygonMesh] mesh to get points.
+        def mesh_points_to_array(mesh)
           mesh.points.each do |pt|
-            pts_array.push(
-              Geometry.length_to_speckle(pt[0], units),
-              Geometry.length_to_speckle(pt[1], units),
-              Geometry.length_to_speckle(pt[2], units)
-            )
+            # FIXME: Enable previous line when viewer supports shared vertices
+            # vertices.push(pt) unless vertices.any? { |point| point == pt }
+            vertices.push(pt)
           end
-          pts_array
         end
 
-        # get a flat array of face indices from a sketchup face
-        def self.face_indices_to_array(face, offset)
-          face_array = [face.vertices.count]
-          face_array.push(*face.vertices.count.times.map { |index| index + offset })
-          face_array
-        end
-
-        # get an array of face indices from a sketchup polygon mesh
-        def self.mesh_faces_to_array(mesh, offset = 0)
-          faces = []
+        # Get an array of face indices from a sketchup polygon mesh
+        # @param mesh [Geom::PolygonMesh] mesh to convert into polygons.
+        def mesh_faces_to_array(mesh)
           mesh.polygons.each do |poly|
-            faces.push(
-              poly.count, *poly.map { |index| index.abs + offset }
-            )
+            global_polygon_array = [poly.count]
+            poly.each do |index|
+              # FIXME: Enable previous line when viewer supports shared vertices
+              # global_vertex_index = vertices.reverse.find_index(mesh.points[index.abs - 1])
+              global_vertex_index = vertices.length - vertices.reverse.find_index(mesh.points[index.abs - 1]) - 1
+              global_polygon_array.push(global_vertex_index)
+            end
+            polygons.push(*global_polygon_array)
           end
-          faces
         end
 
-        def self.face_edge_flags_to_array(face)
-          face.outer_loop.edges.map(&:soft?)
-        end
+        DEFINITIONS_WILL_BE_HARD_EDGE = %w[
+          Walls
+          Floors
+          Stairs
+          Structural Foundations
+          Doors
+          Windows
+        ].freeze
 
-        def self.mesh_edge_flags_to_array(mesh)
-          edge_flags = []
-          mesh.polygons.each do |poly|
-            edge_flags.push(
-              *poly.map(&:negative?)
-            )
+        # @param mesh [Object] speckle mesh object
+        # @param entities [Sketchup::Entities] sketchup entities that mesh will be created in it as face.
+        def self.get_soften_setting(mesh, entities)
+          unless mesh['sketchup_attributes'].nil?
+            return mesh['sketchup_attributes']['is_soften'].nil? ? true : mesh['sketchup_attributes']['is_soften']
           end
-          edge_flags
-        end
 
-        def self.get_soften_setting(mesh)
-          if mesh['sketchup_attributes'].nil?
-            true
-          else
-            mesh['sketchup_attributes']['is_soften'].nil? ? true : mesh['sketchup_attributes']['is_soften']
-          end
+          return DEFINITIONS_WILL_BE_HARD_EDGE.none? { |def_name| entities.parent.name.include?(def_name) }
         end
 
         def self.get_native_points(mesh)

speckle_connector/src/speckle_objects/geometry/point.rb

@@ -2,7 +2,6 @@
 
 require_relative 'length'
 require_relative '../base'
-require_relative '../../typescript/typescript_object'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -28,6 +27,17 @@ module SpeckleConnector
           self[:units] = units
         end
 
+        # Compare this point with other point those are reference to same coordinate.
+        # @param other [SpeckleObjects::Geometry::Point] other point to compare.
+        def ==(other, tolerance: 1e-15)
+          return false if (self[:x] - other[:x]).abs > tolerance
+          return false if (self[:y] - other[:y]).abs > tolerance
+          return false if (self[:z] - other[:z]).abs > tolerance
+          return false if self[:units] != other[:units]
+
+          true
+        end
+
         # @param vertex [Geom::Point3d] sketchup point to convert speckle point.
         # @param units [String] unit of the point.
         def self.from_vertex(vertex, units)

speckle_connector/src/speckle_objects/other/block_definition.rb

@@ -7,6 +7,7 @@ require_relative '../base'
 require_relative '../geometry/point'
 require_relative '../geometry/mesh'
 require_relative '../geometry/bounding_box'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -16,11 +17,12 @@ module SpeckleConnector
         SPECKLE_TYPE = 'Objects.Other.BlockDefinition'
 
         # @param geometry [Object] geometric definition of the block.
-        # @param base_point [Geometry::Point] base point of the block definition.
         # @param name [String] name of the block definition.
         # @param units [String] units of the block definition.
         # @param application_id [String, NilClass] application id of the block definition.
-        def initialize(geometry:, base_point:, name:, units:, application_id: nil)
+        # rubocop:disable Metrics/ParameterLists
+        def initialize(geometry:, name:, units:, always_face_camera:, sketchup_attributes: {},
+                       application_id: nil)
           super(
             speckle_type: SPECKLE_TYPE,
             total_children_count: 0,
@@ -29,107 +31,224 @@ module SpeckleConnector
           )
           self[:units] = units
           self[:name] = name
-          self[:basePoint] = base_point
-          self['@geometry'] = geometry
+          self[:always_face_camera] = always_face_camera
+          self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
+          # FIXME: Since geometry sends with @ as detached, block basePlane renders on viewer.
+          self['@@geometry'] = geometry
         end
+        # rubocop:enable Metrics/ParameterLists
 
         # @param definition [Sketchup::ComponentDefinition] component definition might be belong to group or component
         #  instance
         # @param units [String] units of the Sketchup model
         # @param definitions [Hash{String=>BlockDefinition}] all converted {BlockDefinition}s on the converter.
-        def self.from_definition(definition, units, definitions, &convert)
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/AbcSize
+        # rubocop:disable Metrics/ParameterLists
+        def self.from_definition(definition, units, definitions, preferences, speckle_state, parent, &convert)
           guid = definition.guid
           return definitions[guid] if definitions.key?(guid)
 
+          dictionaries = {}
+          if preferences[:model][:include_entity_attributes]
+            if definition.group?
+              if preferences[:model][:include_group_entity_attributes]
+                dictionaries = SketchupModel::Dictionary::DictionaryHandler
+                               .attribute_dictionaries_to_speckle(definition)
+              end
+            elsif preferences[:model][:include_component_entity_attributes]
+              dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(definition)
+            end
+          end
+          att = dictionaries.any? ? { dictionaries: dictionaries } : {}
+
           # TODO: Solve logic
           geometry = if definition.entities[0].is_a?(Sketchup::Edge) || definition.entities[0].is_a?(Sketchup::Face)
-                       group_entities_to_speckle(definition, units, definitions, &convert)
+                       new_speckle_state, geo = group_entities_to_speckle(
+                         definition, preferences, speckle_state, parent, &convert
+                       )
+                       speckle_state = new_speckle_state
+                       geo
                      else
-                       definition.entities.map { |entity| convert.call(entity) }
+                       definition.entities.map do |entity|
+                         next if entity.is_a?(Sketchup::Edge) && entity.faces.any?
+
+                         new_speckle_state, converted = convert.call(entity, preferences,
+                                                                     speckle_state,
+                                                                     definition.persistent_id)
+                         speckle_state = new_speckle_state
+                         converted
+                       end
                      end
 
           # FIXME: Decide how to approach base point of the definition instead origin.
-          BlockDefinition.new(
+          block_definition = BlockDefinition.new(
             units: units,
             name: definition.name,
-            base_point: Geometry::Point.new(0, 0, 0, units),
             geometry: geometry,
-            application_id: guid
+            always_face_camera: definition.behavior.always_face_camera?,
+            sketchup_attributes: att,
+            application_id: definition.persistent_id.to_s
           )
-        end
-
-        # Finds or creates a component definition from the geometry and the given name
-        # @param sketchup_model [Sketchup::Model] sketchup model to check block definitions.
-        # rubocop:disable Metrics/CyclomaticComplexity
-        # rubocop:disable Metrics/PerceivedComplexity
-        # rubocop:disable Metrics/ParameterLists
-        def self.to_native(sketchup_model, geometry, layer, name, application_id = '', &convert)
-          definition = sketchup_model.definitions[name]
-          return definition if definition && (definition.name == name || definition.guid == application_id)
-
-          definition&.entities&.clear!
-          definition ||= sketchup_model.definitions.add(name)
-          definition.layer = layer
-          geometry.each { |obj| convert.call(obj, layer, definition.entities) } if geometry.is_a?(Array)
-          convert.call(geometry, layer, definition.entities) if geometry.is_a?(Hash) && !geometry['speckle_type'].nil?
-          # puts("definition finished: #{name} (#{application_id})")
-          # puts("    entity count: #{definition.entities.count}")
-          definition
+          return speckle_state, block_definition
         end
         # rubocop:enable Metrics/CyclomaticComplexity
         # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/MethodLength
+        # rubocop:enable Metrics/AbcSize
         # rubocop:enable Metrics/ParameterLists
 
-        def self.group_entities_to_speckle(definition, units, definitions, &convert)
+        def self.get_definition_name(def_obj)
+          return def_obj['name'] unless def_obj['name'].nil?
+
+          return "def::#{def_obj['applicationId']}"
+        end
+
+        # Finds or creates a component definition from the geometry and the given name
+        # @param state [States::State] state of the application.
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/AbcSize
+        def self.to_native(state, definition_obj, layer, _entities, &convert_to_native)
+          sketchup_model = state.sketchup_state.sketchup_model
+
+          # FIXME: Check later this is a valid check or not. Maybe unnecessary? If necessary document it!
+          # Check definitions from sketchup_model with name and application id
+          definition_name = get_definition_name(definition_obj)
+          application_id = definition_obj['applicationId']
+          definition = sketchup_model.definitions[definition_name]
+          if definition && (definition.name == definition_name || definition.guid == application_id)
+            return state, [definition]
+          end
+
+          geometry = definition_obj['geometry'] || definition_obj['@geometry'] || definition_obj['displayValue']
+
+          always_face_camera = definition_obj['always_face_camera'].nil? ? false : definition_obj['always_face_camera']
+          sketchup_attributes = definition_obj['sketchup_attributes']
+          definition&.entities&.clear!
+          definition ||= sketchup_model.definitions.add(definition_name)
+          definition.layer = layer
+
+          if geometry.is_a?(Array)
+            geometry.each do |obj|
+              state = convert_to_native.call(state, obj, layer, definition.entities)
+            end
+          end
+          if geometry.is_a?(Hash) && !definition_obj['speckle_type'].nil?
+            state = convert_to_native.call(state, geometry, layer, definition.entities)
+          end
+          # puts("definition finished: #{name} (#{application_id})")
+          # puts("    entity count: #{definition.entities.count}")
+          definition.behavior.always_face_camera = always_face_camera
+          unless sketchup_attributes.nil?
+            SketchupModel::Dictionary::DictionaryHandler
+              .attribute_dictionaries_to_native(definition, sketchup_attributes['dictionaries'])
+          end
+          return state, [definition]
+        end
+        # rubocop:enable Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/MethodLength
+        # rubocop:enable Metrics/AbcSize
+
+        # rubocop:disable Metrics/AbcSize
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/PerceivedComplexity
+        def self.group_entities_to_speckle(definition, preferences, speckle_state, parent, &convert)
           orphan_edges = definition.entities.grep(Sketchup::Edge).filter { |edge| edge.faces.none? }
           lines = orphan_edges.collect do |orphan_edge|
-            Geometry::Line.from_edge(orphan_edge, units)
+            new_speckle_state, converted = convert.call(orphan_edge, preferences, speckle_state, parent)
+            speckle_state = new_speckle_state
+            converted
           end
 
           nested_blocks = definition.entities.grep(Sketchup::ComponentInstance).collect do |component_instance|
-            BlockInstance.from_component_instance(component_instance, units, definitions, &convert)
+            new_speckle_state, converted = convert.call(component_instance, preferences, speckle_state, parent)
+            speckle_state = new_speckle_state
+            converted
           end
 
-          meshes = definition.entities.grep(Sketchup::Face).collect do |face|
-            Geometry::Mesh.from_face(face, units)
+          nested_groups = definition.entities.grep(Sketchup::Group).collect do |group|
+            new_speckle_state, converted = convert.call(group, preferences, speckle_state, parent)
+            speckle_state = new_speckle_state
+            converted
           end
 
-          lines + nested_blocks + meshes
-        end
+          if preferences[:model][:combine_faces_by_material]
+            mesh_groups = {}
+            definition.entities.grep(Sketchup::Face).collect do |face|
+              new_speckle_state = group_meshes_by_material(
+                face, mesh_groups, speckle_state, preferences, parent, &convert
+              )
+              speckle_state = new_speckle_state
+            end
+            # Update mesh overwrites points and polygons into base object.
+            mesh_groups.each { |_, mesh| mesh.first.update_mesh }
 
-        # rubocop:disable Metrics/AbcSize
-        def self.group_meshes_by_material(definition, face, mat_groups, units)
-          # convert material
-          mat_id = face.material.nil? ? 'none' : face.material.entityID
-          mat_groups[mat_id] = initialise_group_mesh(face, definition.bounds, units) unless mat_groups.key?(mat_id)
-          mat_group = mat_groups[mat_id]
-          if face.loops.size > 1
-            mesh = face.mesh
-            mat_group[:'@(31250)vertices'].push(*Geometry::Mesh.mesh_points_to_array(mesh, units))
-            mat_group[:'@(62500)faces'].push(*Geometry::Mesh.mesh_faces_to_array(mesh, mat_group[:pt_count] - 1))
-            mat_group[:'@(31250)faceEdgeFlags'].push(*Geometry::Mesh.mesh_edge_flags_to_array(mesh))
+            return speckle_state, lines + nested_blocks + nested_groups + mesh_groups.values
           else
-            mat_group[:'@(31250)vertices'].push(*Geometry::Mesh.face_vertices_to_array(face, units))
-            mat_group[:'@(62500)faces'].push(*Geometry::Mesh.face_indices_to_array(face, mat_group[:pt_count]))
-            mat_group[:'@(31250)faceEdgeFlags'].push(*Geometry::Mesh.face_edge_flags_to_array(face))
+            meshes = []
+            definition.entities.grep(Sketchup::Face).collect do |face|
+              new_speckle_state, converted = convert.call(face, preferences, speckle_state, parent)
+              meshes.append(converted)
+              speckle_state = new_speckle_state
+            end
+
+            return speckle_state, lines + nested_blocks + nested_groups + meshes
           end
-          mat_group[:pt_count] += face.vertices.count
         end
         # rubocop:enable Metrics/AbcSize
+        # rubocop:enable Metrics/MethodLength
+        # rubocop:enable Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/PerceivedComplexity
 
-        def self.initialise_group_mesh(face, bounds, units)
-          has_any_soften_edge = face.edges.any?(&:soft?)
-          mesh = Geometry::Mesh.new(
-            units: units,
-            render_material: face.material.nil? ? nil : RenderMaterial.from_material(face.material),
-            bbox: Geometry::BoundingBox.from_bounds(bounds, units),
-            vertices: [],
-            faces: [],
-            face_edge_flags: [],
-            sketchup_attributes: { is_soften: has_any_soften_edge }
-          )
-          mesh[:pt_count] = 0
-          mesh
+        # rubocop:disable Metrics/ParameterLists
+        def self.group_meshes_by_material(face, mesh_groups, speckle_state, preferences, parent, &convert)
+          # convert material
+          mesh_group_id = get_mesh_group_id(face, preferences[:model])
+          new_speckle_state, converted = convert.call(face, preferences, speckle_state, parent)
+          mesh_groups[mesh_group_id] = converted unless mesh_groups.key?(mesh_group_id)
+          mesh_group = mesh_groups[mesh_group_id]
+          mesh_group[0].face_to_mesh(face)
+          mesh_group[1].append(face)
+          new_speckle_state
+        end
+        # rubocop:enable Metrics/ParameterLists
+
+        # Mesh group id helps to determine how to group faces into meshes.
+        # @param face [Sketchup::Face] face to get mesh group id.
+        def self.get_mesh_group_id(face, model_preferences)
+          if model_preferences[:include_entity_attributes] &&
+             model_preferences[:include_face_entity_attributes] &&
+             attribute_dictionary?(face)
+            return face.persistent_id.to_s
+          end
+
+          material = face.material || face.back_material
+          return 'none' if material.nil?
+
+          return material.entityID.to_s
+        end
+
+        def self.attribute_dictionary?(face)
+          any_attribute_dictionary = !(face.attribute_dictionaries.nil? || face.attribute_dictionaries.first.nil?)
+          return any_attribute_dictionary unless any_attribute_dictionary
+
+          # If there are any attribute dictionary, then make sure that they are not ignored ones.
+          all_attribute_dictionary_ignored = face.attribute_dictionaries.all? do |dict|
+            ignored_dictionaries.include?(dict.name)
+          end
+          !all_attribute_dictionary_ignored
+        end
+
+        def self.ignored_dictionaries
+          [
+            'Speckle_Base_Object'
+          ]
         end
       end
     end

speckle_connector/src/speckle_objects/other/block_instance.rb

@@ -5,6 +5,7 @@ require_relative 'transform'
 require_relative 'block_definition'
 require_relative '../base'
 require_relative '../geometry/bounding_box'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -16,14 +17,13 @@ module SpeckleConnector
         # @param units [String] units of the block instance.
         # @param is_sketchup_group [Boolean] whether is sketchup group or not. Sketchup Groups represented as
         #  block instance on Speckle.
-        # @param bbox [Geometry::BoundingBox] bounding box of the block instance.
         # @param name [String] name of the block instance.
         # @param transform [Other::Transform] transform of the block instance.
         # @param block_definition [Other::BlockDefinition] definition of the block instance.
-        # @param sketchup_attributes [Other::BlockDefinition] sketchup attributes of the block instance.
+        # @param sketchup_attributes [Hash{Symbol=>Object}] sketchup attributes of the block instance.
         # @param application_id [String] application id of the block instance.
         # rubocop:disable Metrics/ParameterLists
-        def initialize(units:, is_sketchup_group:, bbox:, name:, render_material:, transform:, block_definition:,
+        def initialize(units:, is_sketchup_group:, name:, render_material:, transform:, block_definition:,
                        sketchup_attributes: {}, application_id: nil)
           super(
             speckle_type: SPECKLE_TYPE,
@@ -34,35 +34,60 @@ module SpeckleConnector
           self[:units] = units
           self[:name] = name
           self[:is_sketchup_group] = is_sketchup_group
-          self[:bbox] = bbox
           self[:renderMaterial] = render_material
           self[:transform] = transform
-          self[:sketchup_attributes] = sketchup_attributes
-          self['@blockDefinition'] = block_definition
+          self[:sketchup_attributes] = sketchup_attributes if sketchup_attributes.any?
+          # FIXME: Since blockDefinition sends with @ as detached, block basePlane renders on viewer.
+          self['@@definition'] = block_definition
         end
         # rubocop:enable Metrics/ParameterLists
 
         # @param group [Sketchup::Group] group to convert Speckle BlockInstance
-        def self.from_group(group, units, component_defs, &convert)
-          BlockInstance.new(
+        def self.from_group(group, units, preferences, speckle_state, &convert)
+          new_speckle_state, block_definition = convert.call(group.definition, preferences, speckle_state,
+                                                             group.persistent_id)
+          speckle_state = new_speckle_state
+          dictionaries = {}
+          if preferences[:model][:include_entity_attributes] && preferences[:model][:include_group_entity_attributes]
+            dictionaries = SketchupModel::Dictionary::DictionaryHandler.attribute_dictionaries_to_speckle(group)
+          end
+          att = dictionaries.any? ? { dictionaries: dictionaries } : {}
+
+          block_instance = BlockInstance.new(
             units: units,
-            application_id: group.guid,
             is_sketchup_group: true,
-            bbox: Geometry::BoundingBox.from_bounds(group.bounds, units),
             name: group.name == '' ? nil : group.name,
             render_material: group.material.nil? ? nil : RenderMaterial.from_material(group.material),
             transform: Other::Transform.from_transformation(group.transformation, units),
-            block_definition: BlockDefinition.from_definition(group.definition, units, component_defs, &convert)
+            block_definition: block_definition,
+            sketchup_attributes: att,
+            application_id: group.guid
           )
+          return speckle_state, block_instance
         end
 
         # @param component_instance [Sketchup::ComponentInstance] component instance to convert Speckle BlockInstance
-        def self.from_component_instance(component_instance, units, component_defs, &convert)
-          BlockInstance.new(
+        # rubocop:disable Metrics/MethodLength
+        def self.from_component_instance(component_instance, units, preferences, speckle_state, &convert)
+          new_speckle_state, block_definition = convert.call(
+            component_instance.definition,
+            preferences,
+            speckle_state,
+            component_instance.persistent_id
+          )
+          speckle_state = new_speckle_state
+
+          dictionaries = {}
+          if preferences[:model][:include_entity_attributes] &&
+             preferences[:model][:include_component_entity_attributes]
+            dictionaries = SketchupModel::Dictionary::DictionaryHandler
+                           .attribute_dictionaries_to_speckle(component_instance)
+          end
+          att = dictionaries.any? ? { dictionaries: dictionaries } : {}
+
+          block_instance = BlockInstance.new(
             units: units,
-            application_id: component_instance.guid,
             is_sketchup_group: false,
-            bbox: Geometry::BoundingBox.from_bounds(component_instance.bounds, units),
             name: component_instance.name == '' ? nil : component_instance.name,
             render_material: if component_instance.material.nil?
                                nil
@@ -70,69 +95,117 @@ module SpeckleConnector
                                RenderMaterial.from_material(component_instance.material)
                              end,
             transform: Other::Transform.from_transformation(component_instance.transformation, units),
-            block_definition: BlockDefinition.from_definition(component_instance.definition, units, component_defs,
-                                                              &convert)
+            block_definition: block_definition,
+            sketchup_attributes: att,
+            application_id: component_instance.persistent_id.to_s
           )
+          return speckle_state, block_instance
         end
+        # rubocop:enable Metrics/MethodLength
 
         # Creates a component instance from a block
-        # @param sketchup_model [Sketchup::Model] sketchup model to check block definitions.
+        # @param state [States::State] state of the application.
         # @param block [Object] block object that represents Speckle block.
         # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
         # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
-        # rubocop:disable Metrics/AbcSize
-        # rubocop:disable Metrics/MethodLength
-        def self.to_native(sketchup_model, block, layer, entities, &convert)
+        def self.to_native(state, block, layer, entities, &convert_to_native)
           # is_group = block.key?("is_sketchup_group") && block["is_sketchup_group"]
           # something about this conversion is freaking out if nested block geo is a group
           # so this is set to false always until I can figure this out
           is_group = false
-          definition = BlockDefinition.to_native(
-            sketchup_model,
-            block['@blockDefinition']['@geometry'],
+          # is_group = block['is_sketchup_group']
+          # NOTE: nil checks for backward compatibility
+          block_definition = block['definition'] || block['blockDefinition'] || block['@blockDefinition']
+
+          state, _definitions = BlockDefinition.to_native(
+            state,
+            block_definition,
             layer,
-            block['@blockDefinition']['name'],
-            block['@blockDefinition']['applicationId'],
-            &convert
+            entities,
+            &convert_to_native
           )
 
-          instance_name = block['name'].nil? || block['name'].empty? ? block['id'] : block['name']
-          t_arr = block['transform'].is_a?(Hash) ? block['transform']['value'] : block['transform']
-          transform = Other::Transform.to_native(t_arr, block['units'])
-          instance =
-            if is_group
-              # rubocop:disable SketchupSuggestions/AddGroup
-              group = entities.add_group(definition.entities.to_a)
-              group.layer = layer
-              # rubocop:enable SketchupSuggestions/AddGroup
-            else
-              instance = entities.add_instance(definition, transform)
-              instance.layer = layer
-              instance
-            end
-          # erase existing instances after creation and before rename because you can't have definitions
-          #  without instances
-          find_and_erase_existing_instance(definition, instance_name, block['applicationId'])
-          puts("Failed to create instance for speckle block instance #{block['id']}") if instance.nil?
-          instance.transformation = transform if is_group
-          instance.material = Other::RenderMaterial.to_native(sketchup_model, block['renderMaterial'])
-          instance.name = instance_name
-          instance
+          definition = state.sketchup_state.sketchup_model
+                            .definitions[BlockDefinition.get_definition_name(block_definition)]
+
+          return add_instance_from_definition(state, block, layer, entities, definition, is_group, &convert_to_native)
+        end
+
+        def self.get_transform_matrix(block)
+          if block['transform'].is_a?(Hash)
+            block['transform']['matrix'] || block['transform']['value']
+          else
+            block['transform']
+          end
         end
-        # rubocop:enable Metrics/AbcSize
-        # rubocop:enable Metrics/MethodLength
 
         # takes a component definition and finds and erases the first instance with the matching name
         # (and optionally the applicationId)
-        def self.find_and_erase_existing_instance(definition, name, app_id = '')
-          definition.instances.find { |ins| ins.name == name || ins.guid == app_id }&.erase!
-        end
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/CyclomaticComplexity
+        def self.find_and_erase_existing_instance(definition, upcoming_speckle_id, upcoming_app_id = '')
+          definition.instances.find do |ins|
+            next if ins.attribute_dictionaries.nil?
+            next if ins.attribute_dictionaries.to_a.empty?
+            next if ins.attribute_dictionaries.to_a.none? { |dict| dict.name == SPECKLE_BASE_OBJECT }
 
-        private
-
-        def attribute_types
-          ATTRIBUTE_TYPES
+            dict = ins.attribute_dictionaries.to_a.find { |d| d.name == SPECKLE_BASE_OBJECT }
+            speckle_id = dict[:speckle_id]
+            application_id = dict[:application_id]
+            speckle_id == upcoming_speckle_id || application_id == upcoming_app_id
+          end&.erase!
         end
+        # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/CyclomaticComplexity
+
+        # rubocop:disable Metrics/AbcSize
+        # rubocop:disable Metrics/MethodLength
+        # rubocop:disable Metrics/CyclomaticComplexity
+        # rubocop:disable Metrics/PerceivedComplexity
+        # rubocop:disable Metrics/ParameterLists
+        def self.add_instance_from_definition(state, block, layer, entities, definition, is_group, &convert_to_native)
+          t_arr = get_transform_matrix(block)
+          transform = Other::Transform.to_native(t_arr, block['units'])
+          instance = if is_group
+                       # rubocop:disable SketchupSuggestions/AddGroup
+                       group = entities.add_group(definition.entities.to_a)
+                       group.layer = layer
+                       group
+                       # rubocop:enable SketchupSuggestions/AddGroup
+                     else
+                       instance = entities.add_instance(definition, transform)
+                       instance.layer = layer
+                       instance
+                     end
+
+          # erase existing instances after creation and before rename because you can't have definitions
+          #  without instances
+          find_and_erase_existing_instance(definition, block['id'], block['applicationId'])
+          puts("Failed to create instance for speckle block instance #{block['id']}") if instance.nil?
+          # Transform already applied to instance unless is group
+          instance.transformation = transform if is_group
+          state, _materials = Other::RenderMaterial.to_native(state, block['renderMaterial'],
+                                                              layer, entities, &convert_to_native)
+
+          # Retrieve material from state
+          unless block['renderMaterial'].nil?
+            material_name = block['renderMaterial']['name'] || block['renderMaterial']['id']
+            material = state.sketchup_state.materials.by_id(material_name)
+            instance.material = material
+          end
+
+          instance.name = block['name'] unless block['name'].nil?
+          unless block['sketchup_attributes'].nil?
+            SketchupModel::Dictionary::DictionaryHandler
+              .attribute_dictionaries_to_native(instance, block['sketchup_attributes']['dictionaries'])
+          end
+          return state, [instance, definition]
+        end
+        # rubocop:enable Metrics/AbcSize
+        # rubocop:enable Metrics/MethodLength
+        # rubocop:enable Metrics/CyclomaticComplexity
+        # rubocop:enable Metrics/PerceivedComplexity
+        # rubocop:enable Metrics/ParameterLists
       end
     end
   end

speckle_connector/src/speckle_objects/other/color.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Others
+      # Color object transformations between sketchup and speckle.
+      class Color
+        # @param color [Sketchup::Color] color to convert speckle object
+        def self.to_speckle(color)
+          {
+            red: color.red,
+            green: color.green,
+            blue: color.blue,
+            alpha: color.alpha
+          }
+        end
+
+        def self.to_native(speckle_color)
+          Sketchup::Color.new(speckle_color['red'], speckle_color['green'],
+                              speckle_color['blue'], speckle_color['alpha'])
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/display_value.rb

@@ -0,0 +1,85 @@
+# frozen_string_literal: true
+
+require_relative 'render_material'
+require_relative 'transform'
+require_relative 'block_definition'
+require_relative '../../immutable/immutable'
+require_relative '../../ext/immutable_ruby/hash'
+require_relative '../base'
+require_relative '../geometry/bounding_box'
+require_relative '../../sketchup_model/dictionary/dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Other
+      # DisplayValue object definition for Speckle that represents as BlockInstance in Sketchup.
+      class DisplayValue
+        def self.get_definition_name(def_obj)
+          family = def_obj['family']
+          type = def_obj['type']
+          category = def_obj['category']
+          element_id = def_obj['elementId']
+
+          return format_naming_convention([family, type, category, element_id]) unless element_id.nil?
+
+          return "def::#{def_obj['applicationId']}"
+        end
+
+        def self.format_naming_convention(entries)
+          name = ''
+          entries.each_with_index do |entry, index|
+            next if entry.nil?
+
+            name += if index == entries.length - 1
+                      entry.to_s
+                    else
+                      "#{entry}-"
+                    end
+          end
+          name
+        end
+
+        # Creates a component definition and instance from a speckle object with a display value
+        # @param state [States::State] state of the application.
+        def self.to_native(state, obj, layer, entities, &convert_to_native)
+          # Switch displayValue with geometry
+          obj = collect_definition_geometries(obj)
+          obj['name'] = get_definition_name(obj)
+
+          state, _definitions = BlockDefinition.to_native(
+            state,
+            obj,
+            layer,
+            entities,
+            &convert_to_native
+          )
+
+          definition = state.sketchup_state.sketchup_model.definitions[BlockDefinition.get_definition_name(obj)]
+
+          BlockInstance.find_and_erase_existing_instance(definition, obj['id'], obj['applicationId'])
+          t_arr = obj['transform']
+          transform = t_arr.nil? ? Geom::Transformation.new : OTHER::Transform.to_native(t_arr, units)
+          instance = entities.add_instance(definition, transform)
+          instance.name = obj['name'] unless obj['name'].nil?
+          return state, [instance, definition]
+        end
+
+        def self.collect_definition_geometries(obj)
+          obj['geometry'] = obj['displayValue']
+
+          if !obj['elements'].nil? && obj['elements'].is_a?(Array)
+            obj['elements'].each do |element|
+              # Mullions is a special case here, they are extracted as base object with @displayValue from revit..
+              if element['@displayValue'].nil?
+                obj['geometry'].append(element)
+              else
+                obj['geometry'] += element['@displayValue']
+              end
+            end
+          end
+          obj
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/render_material.rb

@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require_relative '../base'
-require_relative '../../typescript/typescript_object'
 
 module SpeckleConnector
   module SpeckleObjects
@@ -50,21 +49,25 @@ module SpeckleConnector
           )
         end
 
-        # @param sketchup_model [Sketchup::Model] active model on the sketchup.
-        def self.to_native(sketchup_model, render_material)
-          return if render_material.nil?
+        # @param state [States::State] state of the application.
+        def self.to_native(state, render_material, _layer, _entities, &_convert_to_native)
+          return state, [] if render_material.nil?
+
+          sketchup_model = state.sketchup_state.sketchup_model
+          materials = state.sketchup_state.materials
 
           # return material with same name if it exists
           name = render_material['name'] || render_material['id']
-          material = sketchup_model.materials[name]
-          return material if material
+          material = materials.by_id(name)
+          return state, [material] if material
 
           # create a new sketchup material
           material = sketchup_model.materials.add(name)
           material.alpha = render_material['opacity']
           argb = render_material['diffuse']
           material.color = Sketchup::Color.new((argb >> 16) & 255, (argb >> 8) & 255, argb & 255, (argb >> 24) & 255)
-          material
+          new_sketchup_state = state.sketchup_state.with_materials(materials.add_material(name, material))
+          return state.with_sketchup_state(new_sketchup_state), [material]
         end
       end
     end

speckle_connector/src/speckle_objects/other/rendering_options.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require_relative 'color'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Others
+      # Rendering options for scenes.
+      class RenderingOptions
+        # @param options [Sketchup::RenderingOptions] rendering options to convert speckle object
+        def self.to_speckle(options)
+          options.to_h.collect do |option_prop, option_value|
+            speckle_value = if option_value.is_a?(Sketchup::Color)
+                              Color.to_speckle(option_value)
+                            else
+                              option_value
+                            end
+            [option_prop.to_sym, speckle_value]
+          end.to_h
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/revit/revit_definition.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require_relative '../block_definition'
+require_relative '../../base'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Other
+      module Revit
+        # RevitDefinition for Speckle.
+        class RevitDefinition < Base
+          SPECKLE_TYPE = OBJECTS_OTHER_REVIT_REVITINSTANCE
+
+          def self.get_definition_name(def_obj)
+            family = def_obj['family']
+            type = def_obj['type']
+            category = def_obj['category']
+
+            return "#{family}-#{type}-#{category}-#{def_obj['id']}"
+          end
+
+          def self.to_native(state, definition, layer, entities, &convert_to_native)
+            definition_name = get_definition_name(definition)
+            definition['name'] = definition_name
+            definition['displayValue'] += definition['elements'] unless definition['elements'].nil?
+            BlockDefinition.to_native(state, definition, layer, entities, &convert_to_native)
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/revit/revit_instance.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require_relative 'revit_definition'
+require_relative '../render_material'
+require_relative '../transform'
+require_relative '../block_definition'
+require_relative '../../base'
+require_relative '../../geometry/bounding_box'
+require_relative '../../../sketchup_model/dictionary/dictionary_handler'
+
+module SpeckleConnector
+  module SpeckleObjects
+    module Other
+      module Revit
+        # RevitInstance object definition for Speckle.
+        class RevitInstance < Base
+          SPECKLE_TYPE = OBJECTS_OTHER_REVIT_REVITINSTANCE
+
+          # Creates a component instance from a block
+          # @param state [States::State] state of the application.
+          # @param block [Object] block object that represents Speckle block.
+          # @param layer [Sketchup::Layer] layer to add {Sketchup::Edge} into it.
+          # @param entities [Sketchup::Entities] entities collection to add {Sketchup::Edge} into it.
+          def self.to_native(state, block, layer, entities, &convert_to_native)
+            block_definition = block['definition']
+
+            state, _definitions = RevitDefinition.to_native(
+              state,
+              block_definition,
+              layer,
+              entities,
+              &convert_to_native
+            )
+
+            definition = state.sketchup_state.sketchup_model
+                              .definitions[RevitDefinition.get_definition_name(block_definition)]
+
+            return BlockInstance.add_instance_from_definition(state, block, layer, entities,
+                                                              definition, false, &convert_to_native)
+          end
+        end
+      end
+    end
+  end
+end

speckle_connector/src/speckle_objects/other/transform.rb

@@ -11,8 +11,7 @@ module SpeckleConnector
 
         # @param units [String] units of the transform.
         # @param value [Array<Numeric>] values of the transform.
-        # @param sketchup_attributes [Other::BlockDefinition] sketchup attributes of the transform.
-        def initialize(units:, value:, sketchup_attributes: {})
+        def initialize(units:, value:)
           super(
             speckle_type: SPECKLE_TYPE,
             total_children_count: 0,
@@ -21,7 +20,6 @@ module SpeckleConnector
           )
           self[:units] = units
           self[:value] = value
-          self[:sketchup_attributes] = sketchup_attributes
         end
 
         def self.from_transformation(transformation, units)

speckle_connector/src/states/sketchup_state.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 require_relative '../immutable/immutable'
+require_relative '../sketchup_model/materials/materials'
+require_relative '../sketchup_model/definitions/definitions'
 
 module SpeckleConnector
   module States
@@ -10,9 +12,17 @@ module SpeckleConnector
       # @return [Sketchup::Model] active model on the sketchup
       attr_reader :sketchup_model
 
+      # @return [SketchupModel::Materials] materials by their id
+      attr_reader :materials
+
+      # @return [SketchupModel::Definitions] definitions by their guid and name
+      attr_reader :definitions
+
       # @param sketchup_model [Sketchup::Model] active model on the sketchup
       def initialize(sketchup_model)
         @sketchup_model = sketchup_model
+        @materials = SketchupModel::Materials.from_sketchup_model(sketchup_model)
+        @definitions = SketchupModel::Definitions.from_sketchup_model(sketchup_model)
       end
 
       # @return [Integer] length units code of the sketchup model.
@@ -20,6 +30,10 @@ module SpeckleConnector
       def length_units
         sketchup_model.options['UnitsOptions']['LengthUnit']
       end
+
+      def with_materials(new_materials)
+        with(:@materials => new_materials)
+      end
     end
   end
 end

speckle_connector/src/states/speckle_state.rb

@@ -2,6 +2,7 @@
 
 require_relative '../immutable/immutable'
 require_relative '../callbacks/callback_message'
+require_relative '../speckle_entities/speckle_entity'
 
 module SpeckleConnector
   module States
@@ -9,19 +10,33 @@ module SpeckleConnector
     class SpeckleState
       include Immutable::ImmutableUtils
 
-      # @return [Hash] accounts on appdata.
+      # @return [ImmutableHash{Integer=>SpeckleEntities::SpeckleEntity}] persistent_id of the sketchup entity and
+      #  corresponding speckle entity
+      attr_reader :speckle_entities
+
+      # @return [Array] accounts on appdata.
       attr_reader :accounts
 
+      # @return [Hash{Class => Observer}] the observer objects that are used to attach to objects in Sketchup to collect
+      #  events that are triggered from Sketchup
+      attr_reader :observers
+
       # @return [Hash] queue to send to server.
       attr_reader :message_queue
 
       # @return [Hash] stream queue to send to server.
       attr_reader :stream_queue
 
-      def initialize(accounts, queue, stream_queue)
+      # @return [Relations::ManyToOneRelation] relations between objects.
+      attr_accessor :relation
+
+      def initialize(accounts, observers, queue, stream_queue)
         @accounts = accounts
+        @observers = observers
         @message_queue = queue
         @stream_queue = stream_queue
+        @speckle_entities = Immutable::EmptyHash
+        @relation = Relations::ManyToOneRelation.new
       end
 
       # @param callback_name [String] name of the callback command
@@ -32,6 +47,41 @@ module SpeckleConnector
         new_queue = message_queue.merge({ "#{callback_name}": next_queue_message })
         with(:@message_queue => new_queue)
       end
+
+      def with_invalid_streams_queue
+        new_queue = message_queue.merge({ "updateInvalidStreams":
+                                            "updateInvalidStreams(#{JSON.generate(invalid_streams)})" })
+        with(:@message_queue => new_queue)
+      end
+
+      def with_empty_invalid_streams_queue
+        new_queue = message_queue.merge({ "updateInvalidStreams":
+                                            "updateInvalidStreams(#{JSON.generate([])})" })
+        with(:@message_queue => new_queue)
+      end
+
+      def with_accounts(new_accounts)
+        with(:@accounts => new_accounts)
+      end
+
+      def with_speckle_entity(traversed_entity)
+        new_speckle_entities = speckle_entities.put(traversed_entity.application_id, traversed_entity)
+        with_speckle_entities(new_speckle_entities)
+      end
+
+      def with_speckle_entities(new_speckle_entities)
+        with(:@speckle_entities => new_speckle_entities)
+      end
+
+      def with_relation(new_relation)
+        with(:@relation => new_relation)
+      end
+
+      def invalid_streams
+        speckle_entities.collect do |_id, speckle_entity|
+          speckle_entity.invalid_stream_ids
+        end.reduce([], :concat).uniq
+      end
     end
   end
 end

speckle_connector/src/states/state.rb

@@ -40,6 +40,18 @@ module SpeckleConnector
         new_speckle_state = speckle_state.with(:@stream_queue => {})
         with(:@speckle_state => new_speckle_state)
       end
+
+      def with_speckle_state(new_speckle_state)
+        with(:@speckle_state => new_speckle_state)
+      end
+
+      def with_sketchup_state(new_sketchup_state)
+        with(:@sketchup_state => new_sketchup_state)
+      end
+
+      def with_user_state(new_user_state)
+        with(:@user_state => new_user_state)
+      end
     end
   end
 end

speckle_connector/src/states/user_state.rb

@@ -8,12 +8,24 @@ module SpeckleConnector
     class UserState
       include Immutable::ImmutableUtils
 
-      # @return [Hash{Symbol => Object}] user specific preferences
+      # @return [ImmutableHash{Symbol => Object}] user specific preferences
       attr_reader :preferences
 
       def initialize(preferences)
         @preferences = preferences
       end
+
+      def user_preferences
+        @preferences[:user]
+      end
+
+      def model_preferences
+        @preferences[:model]
+      end
+
+      def with_preferences(new_preferences)
+        with(:@preferences => new_preferences)
+      end
     end
   end
 end

speckle_connector/src/typescript/typescript_object.rb

@@ -1,57 +0,0 @@
-# frozen_string_literal: true
-
-require 'json'
-
-module SpeckleConnector
-  module Typescript
-    # Object to help convert object attributes to JSON and by checking types.
-    class TypescriptObject
-      # @param attributes [Hash{Symbol=>Object}] attributes are given as key value pairs
-      def initialize(**attributes)
-        @attributes = attributes
-        check_attributes
-      end
-
-      # @return [String] the JSON representation of the object
-      def to_json(*options)
-        @attributes.to_json(*options)
-      end
-
-      def to_h(*options)
-        JSON.parse(to_json(*options), { symbolize_names: true })
-      end
-
-      private
-
-      # rubocop:disable Metrics/CyclomaticComplexity
-      def check_attributes
-        attribute_types.each do |key, class_or_classes|
-          value = @attributes[key]
-          case class_or_classes
-          when Array
-            is_class_correct = class_or_classes.any? do |klass|
-              raise "#{klass} is not a class" unless klass.is_a? Class
-
-              value.is_a? klass
-            end
-            raise "attribute #{key} is of class #{value.class} and not #{class_or_classes}" unless is_class_correct
-          when Class
-            raise ArgumentError, "#{class_or_classes} should be class" unless class_or_classes.is_a? Class
-
-            unless value.is_a? class_or_classes
-              raise ArgumentError,
-                    "attribute #{key} is of class #{value.class} and not #{class_or_classes}"
-            end
-          else
-            raise ArgumentError, "#{class_or_classes} should be class or array of classes"
-          end
-        end
-      end
-      # rubocop:enable Metrics/CyclomaticComplexity
-
-      def attribute_types
-        raise NotImplementedError, 'Implement in child class'
-      end
-    end
-  end
-end

speckle_connector/src/ui/dialog.rb

@@ -29,11 +29,12 @@ module SpeckleConnector
 
       # Show dialog if it's not visible yet
       def show
+        bring_to_front if html_dialog.visible?
         return if html_dialog.visible?
 
         # reset dialog only if it is marked ready, otherwise
         # add_exec_callback is triggered twice upon first initialization
-        reset_dialog! if @ready
+        reset_dialog!
         html_dialog.show
       end
 
@@ -73,6 +74,9 @@ module SpeckleConnector
       # @return [UI::HtmlDialog] the Sketchup interface to html dialog
       def init_dialog
         dialog = UI::HtmlDialog.new(@dialog_specs)
+        dialog.set_can_close do
+          true
+        end
         File.exist?(@htm_file) ? dialog.set_file(@htm_file) : dialog.set_url('http://localhost:8081')
         # dialog.set_url('http://localhost:8081') # uncomment this line if you want to use your local version of ui
         add_exec_callback(dialog)
@@ -93,7 +97,7 @@ module SpeckleConnector
         commands = CommandParser.parse_commands(data)
         commands.each do |cmd|
           puts '### COMMAND CALLED BY DIALOG ###'
-          puts "name: #{cmd.name}, data: #{cmd.data}"
+          puts "name: #{cmd.name}"
           @ready = true if cmd.name == DIALOG_READY
           @commands[cmd.name].run(cmd.data)
         end

speckle_connector/src/ui/vue_view.rb

@@ -11,10 +11,16 @@ require_relative '../commands/dialog_ready'
 require_relative '../commands/save_stream'
 require_relative '../commands/remove_stream'
 require_relative '../commands/notify_connected'
+require_relative '../commands/user_preferences_updated'
+require_relative '../commands/model_preferences_updated'
+require_relative '../commands/activate_diffing'
 
 require_relative '../actions/reload_accounts'
 require_relative '../actions/load_saved_streams'
 require_relative '../actions/init_local_accounts'
+require_relative '../actions/collect_preferences'
+require_relative '../actions/deactivate_diffing'
+require_relative '../actions/collect_versions'
 
 module SpeckleConnector
   module Ui
@@ -60,7 +66,13 @@ module SpeckleConnector
           load_saved_streams: Commands::ActionCommand.new(@app, Actions::LoadSavedStreams),
           save_stream: Commands::SaveStream.new(@app),
           remove_stream: Commands::RemoveStream.new(@app),
-          notify_connected: Commands::NotifyConnected.new(@app)
+          notify_connected: Commands::NotifyConnected.new(@app),
+          collect_preferences: Commands::ActionCommand.new(@app, Actions::CollectPreferences),
+          collect_versions: Commands::ActionCommand.new(@app, Actions::CollectVersions),
+          user_preferences_updated: Commands::UserPreferencesUpdated.new(@app),
+          model_preferences_updated: Commands::ModelPreferencesUpdated.new(@app),
+          activate_diffing: Commands::ActivateDiffing.new(@app),
+          deactivate_diffing: Commands::ActionCommand.new(@app, Actions::DeactivateDiffing)
         }.freeze
       end
     end

tests/src/converters/test_base_object_serializer.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require_relative '../../test_helper'
+require_relative '../../../speckle_connector/src/states/speckle_state'
+require_relative '../../../speckle_connector/src/speckle_objects/geometry/point'
+require_relative '../../../speckle_connector/src/speckle_objects/geometry/line'
+require_relative '../../../speckle_connector/src/convertors/base_object_serializer'
+
+module SpeckleConnector
+  module Converters
+    class BaseObjectSerializerTest < Minitest::Test
+      def setup
+        # Do nothing
+      end
+
+      def teardown
+        # Do nothing
+      end
+
+      def test_base_initialize
+        speckle_state = States::SpeckleState.new({}, {}, {}, {})
+        start_point = SpeckleObjects::Geometry::Point.new(0.0, 0.0, 0.0, 'm')
+        end_point = SpeckleObjects::Geometry::Point.new(10.0, 10.0, 0.0, 'm')
+        line = SpeckleObjects::Geometry::Line.test_line(start_point, end_point, 'm')
+        serializer = Converters::BaseObjectSerializer.new
+
+        new_speckle_state, id, traversed = serializer.serialize(line, speckle_state)
+        assert_equal(id, "a53c02860be04238514f1a5b00883fe2")
+      end
+    end
+  end
+end

tests/src/ext/test_sqlite3.rb

@@ -0,0 +1,103 @@
+# frozen_string_literal: true
+
+require_relative '../../test_helper'
+require_relative '../../../speckle_connector/src/ext/sqlite3'
+require_relative '../../../speckle_connector/src/constants/path_constants'
+
+module SpeckleConnector
+  class Sqlite3Test < Minitest::Test
+    TABLE_NAME = "sketchup_test"
+    TABLE_COLUMNS = "(hash TEXT PRIMARY KEY NOT NULL, content TEXT NOT NULL);"
+    INSERT_DATA = "('oguzhan', 'koral');"
+
+    def setup
+      # Do nothing
+    end
+
+    def teardown
+      # Do nothing
+    end
+
+    def test_table_exists
+      db_path = SPECKLE_TEST_DB_PATH
+
+      db = Sqlite3::Database.new(db_path)
+      exists = db.table_exist?('objects')
+      db.close
+      assert_equal(exists, false)
+    end
+
+    def test_create_table
+      # Init file and close it
+      test_database_file = File.new(SPECKLE_TEST_DB_PATH, "w")
+      test_database_file.close
+
+      # Init sqlite database and create table
+      db = Sqlite3::Database.new(test_database_file.path)
+      db.exec("CREATE TABLE #{TABLE_NAME} #{TABLE_COLUMNS}")
+      exists = db.table_exist?(TABLE_NAME)
+      db.close
+
+      # Assert
+      assert_equal(exists, true)
+
+      # Delete test database file
+      File.delete(test_database_file.path) if File.exist?(test_database_file.path)
+    end
+
+    def test_insert_to_table
+      # Init file and close it
+      test_database_file = File.new(SPECKLE_TEST_DB_PATH, "w")
+      test_database_file.close
+
+      # Init sqlite database
+      db = Sqlite3::Database.new(test_database_file.path)
+
+      # Create table
+      db.exec("CREATE TABLE #{TABLE_NAME} #{TABLE_COLUMNS}")
+
+      # Insert data
+      db.exec("INSERT INTO #{TABLE_NAME} VALUES #{INSERT_DATA}")
+
+      # Select data
+      data = db.exec("SELECT content FROM #{TABLE_NAME} WHERE hash = 'oguzhan'")
+
+      # Close database
+      db.close
+
+      assert_equal(data, [["koral"]])
+
+      # Delete test database file
+      File.delete(test_database_file.path) if File.exist?(test_database_file.path)
+    end
+
+    def test_update_value
+      # Init file and close it
+      test_database_file = File.new(SPECKLE_TEST_DB_PATH, "w")
+      test_database_file.close
+
+      # Init sqlite database
+      db = Sqlite3::Database.new(test_database_file.path)
+
+      # Create table
+      db.exec("CREATE TABLE #{TABLE_NAME} #{TABLE_COLUMNS}")
+
+      # Insert data
+      db.exec("INSERT INTO #{TABLE_NAME} VALUES #{INSERT_DATA}")
+
+      # Update data
+      db.exec("UPDATE #{TABLE_NAME} SET content = 'updated_koral' WHERE hash = 'oguzhan'")
+
+      # Select data
+      data = db.exec("SELECT content FROM #{TABLE_NAME} WHERE hash = 'oguzhan'")
+
+      # Close database
+      db.close
+
+      assert_equal(data, [["updated_koral"]])
+
+      # Delete test database file
+      File.delete(test_database_file.path) if File.exist?(test_database_file.path)
+    end
+  end
+end

ui/src/App.vue

@@ -21,12 +21,10 @@
           solo
         />
         <v-spacer />
-        <v-btn icon small class="mx-1" @click="switchTheme">
-          <v-icon>mdi-theme-light-dark</v-icon>
-        </v-btn>
         <v-btn icon small class="mx-1" @click="requestRefresh">
           <v-icon>mdi-refresh</v-icon>
         </v-btn>
+        <settings-dialog :preferences="preferences"/>
         <v-menu v-if="loggedIn" bottom min-width="200px" rounded offset-y>
           <template #activator="{ on, attrs }">
             <v-btn class="ml-1" icon x-large v-on="on">
@@ -58,10 +56,10 @@
                 {{ user.bio ? 'Bio: ' + user.bio : '' }}
               </div>
             </v-card-text>
-            <v-card-text v-if="accounts">
+            <v-card-text v-if="accounts()">
               <v-divider class="my-3" />
 
-              <div v-for="account in accounts" :key="account.id">
+              <div v-for="account in accounts()" :key="account.id">
                 <v-btn
                   v-if="account.userInfo.id != user.id"
                   rounded
@@ -82,11 +80,18 @@
         </v-menu>
       </v-app-bar>
 
-      <create-stream/>
+      <create-stream-dialog
+          v-if="accounts().length !== 0"
+          :account-id="activeAccount().userInfo.id"
+          :server-url="activeAccount().serverInfo.url"
+      />
 
-      <v-container fluid>
+      <v-container v-if="accounts().length !== 0" fluid>
         <router-view :stream-search-query="streamSearchQuery" />
       </v-container>
+      <v-container v-else>
+        <login/>
+      </v-container>
       <global-toast />
     </v-main>
   </v-app>
@@ -97,16 +102,28 @@
 import { bus } from './main'
 import userQuery from './graphql/user.gql'
 import { onLogin } from './vue-apollo'
-import CreateStream from "@/components/CreateStream";
+import Login from "@/views/Login";
+
+global.collectPreferences = function (preferences) {
+  bus.$emit('update-preferences', preferences)
+}
+
+global.collectVersions = function (versions) {
+  let vers = JSON.parse(versions)
+  localStorage.setItem('hostAppVersion', vers.sketchup)
+  localStorage.setItem('speckleVersion', vers.speckle)
+}
 
 global.loadAccounts = function (accounts) {
   console.log('>>> SpeckleSketchup: Loading accounts', accounts)
   localStorage.setItem('localAccounts', JSON.stringify(accounts))
   let uuid = localStorage.getItem('uuid')
-  if (uuid) {
-    global.setSelectedAccount(accounts.find((acct) => acct['userInfo']['id'] == uuid))
-  } else {
-    global.setSelectedAccount(accounts.find((acct) => acct['isDefault']))
+  if (accounts.length !== 0){
+    if (uuid) {
+      global.setSelectedAccount(accounts.find((acct) => acct['userInfo']['id'] === uuid))
+    } else {
+      global.setSelectedAccount(accounts.find((acct) => acct['isDefault']))
+    }
   }
 }
 
@@ -121,7 +138,9 @@ global.setSelectedAccount = function (account) {
 export default {
   name: 'App',
   components: {
-    CreateStream: () => import('@/components/CreateStream'),
+    Login,
+    CreateStreamDialog: () => import('@/components/dialogs/CreateStreamDialog'),
+    SettingsDialog: () => import('@/components/dialogs/SettingsDialog'),
     GlobalToast: () => import('@/components/GlobalToast')
   },
   props: {
@@ -135,15 +154,13 @@ export default {
       streamSearchQuery: null,
       createNewStreamDialog: false,
       createStreamByIdDialog: false,
-      createStreamByIdText: ""
+      createStreamByIdText: "",
+      preferences: {}
     }
   },
   computed: {
     loggedIn() {
       return localStorage.getItem('SpeckleSketchup.AuthToken') !== null
-    },
-    accounts() {
-      return JSON.parse(localStorage.getItem('localAccounts'))
     }
   },
   apollo: {
@@ -163,14 +180,27 @@ export default {
       if (!this.user) this.$apollo.queries.user.refetch()
     })
 
-    this.$vuetify.theme.dark = localStorage.getItem('theme') == 'dark'
+    bus.$on('update-preferences', async (preferences) => {
+      let prefs = JSON.parse(preferences)
+      this.preferences = prefs
+      this.$vuetify.theme.dark = this.preferences.user.dark_theme
+    })
+
+    // Collect versions to inform mixpanel
+    sketchup.exec({name: "collect_versions", data: {}})
+
+    // Collect preferences to render UI according to it
+    sketchup.exec({name: "collect_preferences", data: {}})
+
+    // Collect accounts from 'Accounts.db' by ruby sqlite3
     sketchup.exec({name: "init_local_accounts", data: {}})
   },
   methods: {
-    switchTheme() {
-      this.$vuetify.theme.dark = !this.$vuetify.theme.dark
-      localStorage.setItem('theme', this.$vuetify.theme.dark ? 'dark' : 'light')
-      this.$mixpanel.track('Connector Action', { name: 'Toggle Theme' })
+    accounts() {
+      return JSON.parse(localStorage.getItem('localAccounts'))
+    },
+    activeAccount(){
+      return this.accounts().find((account) => account['isDefault'])
     },
     switchAccount(account) {
       this.$mixpanel.track('Connector Action', { name: 'Account Select' })

ui/src/components/GlobalToast.vue

@@ -1,6 +1,8 @@
 <template>
-  <v-snackbar v-model="snack" app bottom color="primary">
-    {{ text }}
+  <v-snackbar v-if="text" v-model="snack" app bottom :color="color">
+    <div v-for="(line, index) in text.split('\n')" :key="index">
+      {{ line }}
+    </div>
     <template #action="{}">
       <v-btn v-if="actionName" small outlined @click="openUrl(url)" @click:append="snack = false">
         {{ actionName }}
@@ -16,6 +18,7 @@ export default {
   data() {
     return {
       snack: false,
+      color: "primary",
       text: null,
       actionName: null,
       url: null
@@ -33,6 +36,14 @@ export default {
   mounted() {
     this.$eventHub.$on('notification', (args) => {
       this.snack = true
+      this.color = "primary"
+      this.text = args.text
+      this.actionName = args.action ? args.action.name : null
+      this.url = args.action ? args.action.url : null
+    })
+    this.$eventHub.$on('error', (args) => {
+      this.snack = true
+      this.color = "#CC3300"
       this.text = args.text
       this.actionName = args.action ? args.action.name : null
       this.url = args.action ? args.action.url : null

ui/src/components/StreamCard.vue

@@ -5,7 +5,11 @@
     @mouseenter="hover = true"
     @mouseleave="hover = false"
   >
-    <v-toolbar flat height="70">
+    <v-toolbar flat height="70" :color="getColor(invalid)">
+      <v-btn v-tooptip="''" icon small outlined class="delta-btn" v-if="invalid" @click="activateDiffing">
+        <v-icon v-if="!diffing" class="toggleUpDown" :class='{ "rotate": diffing }' small>mdi-eye-off-outline</v-icon>
+        <v-icon v-else class="toggleUpDown" :class='{ "rotate": diffing }' small>mdi-eye</v-icon>
+      </v-btn>
       <v-toolbar-title class="ml-0" style="position: relative; left: -10px">
         <!-- Uncomment when pinning is in place and add style="position: relative; left: -10px" to the element above :)  -->
         <v-btn
@@ -55,16 +59,22 @@
       <timeago class="mr-1" :datetime="stream.updatedAt" />
       |
       <v-icon class="ml-1" small>mdi-account-key-outline</v-icon>
-      {{ stream.role.split(':')[1] }}
+      {{ stream.role === null ? "" : stream.role.split(':')[1] }}
     </v-card-text>
     <v-card-text class="d-flex align-center pb-5 mb-5 -mt-2" style="height: 50px">
       <v-menu offset-y>
         <template #activator="{ on, attrs }">
+          <v-slide-x-transition>
+            <div v-show="hover">
+              <create-branch-dialog :stream-name="stream.name" :stream-id="streamId"/>
+            </div>
+          </v-slide-x-transition>
           <v-chip v-if="stream.branches" small v-bind="attrs" class="mr-1" v-on="on">
             <v-icon small class="mr-1 float-left">mdi-source-branch</v-icon>
             {{ branchName }}
           </v-chip>
         </template>
+        <!-- Branch list -->
         <v-list dense>
           <v-list-item
             v-for="(branch, index) in stream.branches.items"
@@ -73,7 +83,7 @@
             @click="switchBranch(branch.name)"
           >
             <v-list-item-title class="text-caption font-weight-regular">
-              <v-icon v-if="branch.name == branchName" small class="mr-1 float-left">
+              <v-icon v-if="branch.name === branchName" small class="mr-1 float-left">
                 mdi-check
               </v-icon>
               <v-icon v-else small class="mr-1 float-left">mdi-source-branch</v-icon>
@@ -151,7 +161,7 @@ import gql from 'graphql-tag'
 import { bus } from '../main'
 import streamQuery from '../graphql/stream.gql'
 import ObjectLoader from '@speckle/objectloader'
-import { BaseObjectSerializer } from '../utils/serialization'
+import {HostApplications} from '@/utils/hostApplications'
 
 global.convertedFromSketchup = function (streamId, batches, commitId, totalChildrenCount) {
   bus.$emit(`sketchup-objects-${streamId}`, batches, commitId, totalChildrenCount)
@@ -171,6 +181,9 @@ global.oneClickSend = function (streamId) {
 
 export default {
   name: 'StreamCard',
+  components: {
+    CreateBranchDialog: () => import('@/components/dialogs/CreateBranchDialog'),
+  },
   props: {
     streamId: {
       type: String,
@@ -189,7 +202,9 @@ export default {
       loadingStage: null,
       branchName: 'main',
       commitId: 'latest',
-      commitMessage: null
+      commitMessage: null,
+      invalid: false,
+      diffing: false
     }
   },
   apollo: {
@@ -261,16 +276,39 @@ export default {
   },
   computed: {
     selectedBranch() {
-      if (this.$apollo.loading) return
-      return this.stream.branches.items.find((branch) => branch.name == this.branchName)
+      if (!this.stream) return
+      return this.stream.branches.items.find((branch) => branch.name === this.branchName)
     },
     selectedCommit() {
-      if (this.$apollo.loading) return
-      if (this.commitId == 'latest') return this.selectedBranch.commits.items[0]
-      return this.selectedBranch.commits.items.find((commit) => commit.id == this.commitId)
+      if (!this.selectedBranch) return
+      if (this.commitId === 'latest') return this.selectedBranch.commits.items[0]
+      return this.selectedBranch.commits.items.find((commit) => commit.id === this.commitId)
     }
   },
   mounted() {
+    bus.$on(`deactivate-diffing-${this.streamId}`, () => {
+      this.diffing = false
+    })
+    bus.$on(`validate-stream-${this.streamId}`, () => {
+      this.invalid = false
+      console.log(`validate-stream-${this.streamId}`)
+    })
+    bus.$on(`invalidate-stream-${this.streamId}`, () => {
+      this.invalid = true
+      console.log(`invalidate-stream-${this.streamId}`)
+    })
+    bus.$on(`refresh-stream-${this.streamId}`, () => {
+      let oldBranchName = this.branchName
+      let oldCommitId = this.commitId
+      this.$apollo.queries.stream.refetch()
+      this.branchName = oldBranchName
+      this.commitId = oldCommitId
+    })
+    bus.$on(`create-branch-${this.streamId}`, (branchName) => {
+      this.$apollo.queries.stream.refetch()
+      this.branchName = branchName
+      this.commitId = 'latest'
+    })
     bus.$on(`sketchup-objects-${this.streamId}`, async (batches, commitId, totalChildrenCount) => {
       console.log('>>> SpeckleSketchUp: Received objects from sketchup')
 
@@ -294,6 +332,13 @@ export default {
     if (this.saved) sketchup.exec({name: "notify_connected", data: {stream_id: this.streamId}})
   },
   methods: {
+    getColor(invalid){
+      if(invalid){
+        return "#ffdfdf"
+      } else {
+        return ""
+      }
+    },
     sleep(ms) {
       return new Promise((resolve) => setTimeout(resolve, ms))
     },
@@ -310,6 +355,16 @@ export default {
       this.$mixpanel.track('Connector Action', { name: 'Commit Switch' })
       this.commitId = commitId
     },
+    activateDiffing(){
+      if (this.diffing){
+        this.diffing = false
+        sketchup.exec({name: "deactivate_diffing", data: {}})
+        return
+      }
+      this.diffing = true
+      bus.$emit("deactivate-diffing-except", (this.streamId))
+      sketchup.exec({name: "activate_diffing", data: {stream_id: this.streamId}})
+    },
     toggleSavedStream() {
       if (this.saved) {
         sketchup.exec({name: "remove_stream", data: {stream_id: this.streamId}})
@@ -322,7 +377,11 @@ export default {
     async receive() {
       this.loadingStage = 'requesting'
       this.loadingReceive = true
-      this.$mixpanel.track('Receive')
+      const selectedAccount = JSON.parse(localStorage.getItem('selectedAccount'))
+      const isMultiplayer = this.selectedCommit.authorId !== selectedAccount['userInfo']['id']
+      const sourceApp = this.selectedCommit.sourceApplication
+      const sourceAppSlug = HostApplications.GetHostAppFromString(sourceApp).slug
+      this.$mixpanel.track('Receive', { isMultiplayer: isMultiplayer, sourceHostApp: sourceAppSlug, sourceHostAppVersion: sourceApp})
       const refId = this.selectedCommit?.referencedObject
       if (!refId) {
         this.loadingReceive = false
@@ -344,7 +403,8 @@ export default {
           stream_name: this.stream.name,
           stream_id: this.streamId,
           branch_name: this.selectedCommit.branchName,
-          branch_id: this.selectedCommit.id
+          branch_id: this.selectedCommit.id,
+          source_app: this.selectedCommit.sourceApplication
       }})
 
       await this.$apollo.mutate({
@@ -376,31 +436,23 @@ export default {
       await this.sleep(2000)
     },
     async createCommit(batches, commitId, totalChildrenCount) {
-      if (batches.length == 0) {
+      if (batches.length === 0) {
         this.loadingSend = false
         this.loadingStage = null
         this.$eventHub.$emit('notification', {
-          text: 'No objects selected. Nothing was sent.'
+          text: 'No objects selected. Nothing was sent.\n'
         })
         return
       }
 
-      // let s = new BaseObjectSerializer()
-      // let startTime = new Date()
-      // let { hash, serialized } = s.writeJson(objects)
-      // let endTime = new Date();
-      // let timeDiff = endTime - startTime; //in ms
-      // // strip the ms
-      // timeDiff /= 1000;
-      // // get seconds
-      // console.log(timeDiff + " seconds");
-
       try {
         this.loadingStage = 'uploading'
         this.loadingSend = true
         const totBatches = batches.length
         console.log(`>>> SpeckleSketchUp: ${totBatches} batches ready for sending`)
         let batchesSent = 0
+
+        const t0 = Date.now()
         for (const batch of batches) {
           let res = await this.sendBatch(batch)
           if (res.status !== 201) throw `Upload request failed: ${res.status}`
@@ -408,6 +460,10 @@ export default {
           this.loadingStage = `uploading: ${Math.round((batchesSent / totBatches) * 100)}%`
         }
 
+        const t1 = Date.now()
+        const elapsedTime = (t1-t0) / 1000
+        console.log(`Upload time: ${elapsedTime} second`)
+
         let commit = {
           streamId: this.streamId,
           branchName: this.branchName,
@@ -428,7 +484,7 @@ export default {
         })
         console.log('>>> SpeckleSketchUp: Sent to stream: ' + this.streamId, commit)
         this.$eventHub.$emit('notification', {
-          text: 'Model selection sent!',
+          text: 'Model selection sent!\n',
           action: {
             name: 'View in Web',
             url: `${localStorage.getItem('serverUrl')}/streams/${this.streamId}/commits/${
@@ -461,6 +517,22 @@ export default {
 </script>
 
 <style scoped>
+.delta-btn.v-btn--outlined {
+  border: 1px solid #474747;
+  background: white;
+  margin-left: -90px;
+  margin-top: -50px;
+  position: absolute;
+}
+
+.toggleUpDown {
+  transition: transform .3s ease-in-out !important;
+}
+
+.toggleUpDown.rotate {
+  transform: rotate(180deg);
+}
+
 .fade-enter-active,
 .fade-leave-active {
   transition: opacity 0.2s ease-in;

ui/src/components/dialogs/CreateBranchDialog.vue

@@ -0,0 +1,134 @@
+<template>
+  <!-- DIALOG: Create Branch -->
+  <v-dialog v-model="showCreateBranch">
+    <template #activator="{ on: dialog, attrs }">
+      <v-btn
+          v-tooltip="'Create Branch'"
+          icon x-small class="ml-0 mr-1"
+          v-bind="attrs"
+          v-on="{...dialog}"
+      >
+        <v-icon>
+          mdi-plus-circle
+        </v-icon>
+      </v-btn>
+    </template>
+    <v-card>
+      <v-card-title class="text-h5 mb-1">
+        Create a New Branch
+      </v-card-title>
+      <v-card-subtitle class="py-0 my-0 font-italic">
+        under {{ streamName }} stream
+      </v-card-subtitle>
+      <v-container class="px-6" pb-0>
+        <v-text-field
+            v-model="branchName"
+            xxxclass="small-text-field"
+            hide-details
+            dense
+            flat
+            placeholder="Branch Name"
+        />
+        <v-text-field
+            v-model="description"
+            xxxclass="small-text-field"
+            hide-details
+            dense
+            flat
+            placeholder="Description (Optional)"
+        />
+      </v-container>
+
+      <v-card-actions>
+        <v-spacer></v-spacer>
+        <v-btn
+            color="blue darken-1"
+            text
+            @click="showCreateBranch = false"
+        >
+          Cancel
+        </v-btn>
+        <v-btn
+            :disabled="branchName === ''"
+            color="blue darken-1"
+            text
+            @click="createBranch"
+        >
+          Create
+        </v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
+</template>
+
+<script>
+import gql from "graphql-tag";
+import {bus} from "@/main";
+
+export default {
+  name: "CreateBranchDialog",
+  props: {
+    streamId: {
+      type: String,
+      default: null
+    },
+    streamName: {
+      type: String,
+      default: null
+    }
+  },
+  data() {
+    return {
+      showCreateBranch: false,
+      branchName: "",
+      description: "",
+      defaultDescription: "Stream created from SketchUp",
+      accountToCreateStream: null
+    }
+  },
+  computed: {
+    loggedIn() {
+      return localStorage.getItem('SpeckleSketchup.AuthToken') !== null
+    }
+  },
+  methods: {
+    async createBranch(){
+      let res = await this.$apollo.mutate({
+        mutation: gql`
+            mutation branchCreate($branch: BranchCreateInput!) {
+              branchCreate(branch: $branch)
+            }
+          `,
+        variables: {
+          branch: {
+            streamId: this.streamId,
+            name: this.branchName,
+            description: this.description === '' ? this.defaultDescription : this.description,
+          }
+        }
+      })
+      bus.$emit(`create-branch-${this.streamId}`, this.branchName)
+      this.showCreateBranch = false
+      this.branchName = ""
+      this.description = ""
+      this.$mixpanel.track('Connector Action', { name: 'Branch Create' })
+      return res
+    }
+  }
+}
+</script>
+
+<style>
+
+.v-dialog {
+  max-width: 390px
+}
+
+.v-text-field >>> input {
+  font-size: 0.9em;
+}
+.v-text-field >>> label {
+  font-size: 0.9em;
+}
+
+</style>

ui/src/components/dialogs/CreateStreamDialog.vue

@@ -92,7 +92,6 @@
         </v-dialog>
 
         <!-- DIALOG: Add a Stream by ID or URL -->
-        <!--
         <v-dialog v-model="showCreateStreamById">
           <template #activator="{ on, attrs }">
             <v-btn
@@ -141,14 +140,13 @@
                   :disabled="createStreamByIdText === ''"
                   color="blue darken-1"
                   text
-                  @click="showCreateStreamById = false"
+                  @click="getStream"
               >
                 Add
               </v-btn>
             </v-card-actions>
           </v-card>
         </v-dialog>
-        -->
       </v-col>
     </v-row>
   </v-container>
@@ -159,9 +157,20 @@
 import gql from "graphql-tag";
 import {bus} from "@/main";
 import userQuery from "@/graphql/user.gql";
+import {StreamWrapper} from "@/utils/streamWrapper";
 
 export default {
-  name: "CreateStream",
+  name: "CreateStreamDialog",
+  props: {
+    accountId: {
+      type: String,
+      default: null
+    },
+    serverUrl: {
+      type: String,
+      default: null
+    }
+  },
   data() {
     return {
       showCreateNewStream: false,
@@ -177,10 +186,7 @@ export default {
   computed: {
     loggedIn() {
       return localStorage.getItem('SpeckleSketchup.AuthToken') !== null
-    },
-    accounts() {
-      return JSON.parse(localStorage.getItem('localAccounts'))
-    },
+    }
   },
   apollo: {
     user: {
@@ -188,16 +194,71 @@ export default {
     }
   },
   methods: {
-    activeAccount(){
-      return JSON.parse(localStorage.getItem('selectedAccount'))
-    },
-    switchAccountToCreateStream(account) {
-      this.accountToCreateStream = account
-    },
     refresh() {
       this.$apollo.queries.user.refetch()
       bus.$emit('refresh-streams')
     },
+    async getStream(){
+      try {
+        const streamWrapper = new StreamWrapper(this.createStreamByIdText, this.accountId, this.serverUrl)
+        let res = await this.$apollo.query({
+          query: gql`
+            query Stream($id: String!){
+              stream(id: $id){
+                id
+                name
+                description
+                isPublic
+                role
+                createdAt
+                updatedAt
+                commentCount
+                favoritedDate
+                favoritesCount
+                collaborators {
+                  id
+                  name
+                  role
+                  avatar
+                },
+                branches (limit: ${10}){
+                  totalCount,
+                  cursor,
+                  items {
+                    id,
+                    name,
+                    description,
+                    commits {
+                      totalCount
+                    }
+                  }
+                }
+              }
+            }
+          `,
+          variables: {
+            id: streamWrapper.streamId
+          }
+        })
+        let stream = res.data.stream
+
+        this.$eventHub.$emit('notification', {
+          text: 'Stream Added by URL!\n',
+        })
+        bus.$emit('stream-added-by-id-or-url', stream.id)
+        this.$mixpanel.track('Connector Action', { name: 'Stream Add From URL' })
+      }
+      catch (e){
+        this.$eventHub.$emit('error', {
+          text: 'The stream you are trying to add might;\n' +
+              '- lies on different server, \n' +
+              '- be private, \n' +
+              '- not be existed anymore.',
+        })
+      }
+
+      this.showCreateStreamById = false
+    },
     async createStream(){
       let res = await this.$apollo.mutate({
         mutation: gql`
@@ -216,6 +277,7 @@ export default {
       this.showCreateNewStream = false
       this.streamName = ""
       this.description = ""
+      this.$mixpanel.track('Connector Action', { name: 'Stream Create' })
       sketchup.exec({name: "save_stream", data: {stream_id: res["data"]["streamCreate"]}})
       this.refresh()
       return res

ui/src/components/dialogs/SettingsDialog.vue

@@ -0,0 +1,254 @@
+<template>
+  <!-- DIALOG: Settings -->
+  <v-dialog v-model="showSettings">
+    <template #activator="{ on, attrs }">
+      <v-btn
+          icon small class="mx-1"
+          v-bind="attrs"
+          v-on="on"
+      >
+        <v-icon>mdi-cog</v-icon>
+      </v-btn>
+    </template>
+
+    <v-card>
+      <v-card-title class="text-h5">
+        Settings
+      </v-card-title>
+      <v-container class="px-6" pb-0>
+        <!-- Switch Theme -->
+        <div class="sm1 mt-3">User Preferences</div>
+        <v-divider class="mb-2"/>
+        <v-btn icon small class="mx-1" @click="switchTheme">
+          <v-icon>mdi-theme-light-dark</v-icon>
+        </v-btn>
+        <span>Color Mode</span>
+
+        <!-- Register objects as Speckle Entity on send/receive -->
+        <v-switch
+            :input-value="registerSpeckleEntity"
+            class="pt-3 mt-n2 mb-n7"
+            :label="'Register objects as Speckle Entity on send/receive'"
+            @change="registerSpeckleEntityHandler"
+        />
+
+        <!-- Switch Diffing -->
+        <v-switch
+            :input-value="diffing"
+            class="pt-3 mt-n2 mb-n2"
+            :label="'Diffing (Alpha)'"
+            @change="diffingHandler"
+        />
+
+        <div class="sm1 mt-3">Model Preferences</div>
+        <v-divider class="mb-2"/>
+        <v-switch
+            class="pt-1 mt-n2 mb-n2"
+            :input-value="combineFacesByMaterial"
+            :label="'Combine faces by material under mesh'"
+            @change="combineFacesByMaterialHandler"
+        />
+        <v-switch
+            :input-value="includeAttributes"
+            class="pt-1 my-n5"
+            :label="'Include entity attributes'"
+            @change="includeAttributesHandler"
+        />
+        <v-icon class="ml-3" style="line-height: 0;">mdi-arrow-right-bottom</v-icon>
+        <v-switch
+            :input-value="includeEdgeAttributes"
+            class="pt-1 my-n5 ml-10"
+            :label="'Edge'"
+            :disabled="!includeAttributes"
+            @change="includeEdgeAttributesHandler"
+        />
+        <v-icon class="ml-3" style="line-height: 0;">mdi-arrow-right-bottom</v-icon>
+        <v-switch
+            :input-value="includeFaceAttributes"
+            class="pt-1 my-n5 ml-10"
+            :label="'Face'"
+            :disabled="!includeAttributes"
+            @change="includeFaceAttributesHandler"
+        />
+        <v-icon class="ml-3" style="line-height: 0;">mdi-arrow-right-bottom</v-icon>
+        <v-switch
+            :input-value="includeGroupAttributes"
+            class="pt-1 my-n5 ml-10"
+            :label="'Group'"
+            :disabled="!includeAttributes"
+            @change="includeGroupAttributesHandler"
+        />
+        <v-icon class="ml-3" style="line-height: 0;">mdi-arrow-right-bottom</v-icon>
+        <v-switch
+            :input-value="includeComponentAttributes"
+            class="pt-1 my-n5 ml-10"
+            :label="'Component'"
+            :disabled="!includeAttributes"
+            @change="includeComponentAttributesHandler"
+        />
+        <v-switch
+            :input-value="mergeCoplanarFaces"
+            class="pt-1 mt-n2 mb-n2"
+            :label="'Merge co-planar faces on receive'"
+            @change="mergeCoplanarFacesHandler"
+        />
+      </v-container>
+
+      <v-card-actions>
+        <v-spacer></v-spacer>
+        <v-btn
+            color="blue darken-1"
+            text
+            @click="showSettings = false"
+        >
+          Close
+        </v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
+</template>
+
+<script>
+/*global sketchup*/
+import {bus} from "@/main";
+
+export default {
+  name: "ShowSettings",
+  props: {
+    preferences: {
+      type: Object,
+      default: null
+    }
+  },
+  data() {
+    return {
+      showSettings: false,
+      streamName: "",
+      description: "",
+      combineFacesByMaterial: this.preferences.model.combine_faces_by_material,
+      includeAttributes: this.preferences.model.include_entity_attributes,
+      includeFaceAttributes: this.preferences.model.include_face_entity_attributes,
+      includeEdgeAttributes: this.preferences.model.include_edge_entity_attributes,
+      includeGroupAttributes: this.preferences.model.include_group_entity_attributes,
+      includeComponentAttributes: this.preferences.model.include_component_entity_attributes,
+      mergeCoplanarFaces: this.preferences.model.merge_coplanar_faces,
+      diffing: this.preferences.user.diffing,
+      registerSpeckleEntity: this.preferences.user.register_speckle_entity
+    }
+  },
+  watch: {
+    'preferences': {
+      handler(newValue) {
+        this.combineFacesByMaterial = newValue.model.combine_faces_by_material
+        this.includeAttributes = newValue.model.include_entity_attributes
+        this.includeFaceAttributes = newValue.model.include_face_entity_attributes
+        this.includeEdgeAttributes = newValue.model.include_edge_entity_attributes
+        this.includeGroupAttributes = newValue.model.include_group_entity_attributes
+        this.includeComponentAttributes = newValue.model.include_component_entity_attributes
+        this.mergeCoplanarFaces = newValue.model.merge_coplanar_faces
+        this.diffing = newValue.user.diffing
+        this.registerSpeckleEntity = newValue.user.register_speckle_entity
+      },
+      deep: true,
+      immediate: true
+    },
+    'showSettings': {
+      handler(newValue) {
+        if (newValue){
+          this.$mixpanel.track('Connector Action', { name: 'Settings Open' })
+        }
+      }
+    }
+  },
+  methods: {
+    diffingHandler(newValue){
+      this.diffing = !!newValue
+      sketchup.exec({
+        name: "user_preferences_updated",
+        data: {preference_hash: "configSketchup", preference: "diffing", value: this.diffing}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Diffing' })
+    },
+    registerSpeckleEntityHandler(newValue){
+      this.registerSpeckleEntity = !!newValue
+      sketchup.exec({
+        name: "user_preferences_updated",
+        data: {preference_hash: "configSketchup", preference: "register_speckle_entity", value: this.registerSpeckleEntity}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Register Speckle Entity' })
+    },
+    combineFacesByMaterialHandler(newValue){
+      this.combineFacesByMaterial = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "combine_faces_by_material", value: this.combineFacesByMaterial}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Combine Faces By Material' })
+    },
+    includeAttributesHandler(newValue){
+      this.includeAttributes = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "include_entity_attributes", value: this.includeAttributes}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Include Entity Attributes' })
+    },
+    includeFaceAttributesHandler(newValue){
+      this.includeFaceAttributes = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "include_face_entity_attributes", value: this.includeFaceAttributes}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Include Face Entity Attributes' })
+    },
+    includeEdgeAttributesHandler(newValue){
+      this.includeEdgeAttributes = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "include_edge_entity_attributes", value: this.includeEdgeAttributes}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Include Edge Entity Attributes' })
+    },
+    includeGroupAttributesHandler(newValue){
+      this.includeGroupAttributes = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "include_group_entity_attributes", value: this.includeGroupAttributes}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Include Group Entity Attributes' })
+    },
+    includeComponentAttributesHandler(newValue){
+      this.includeComponentAttributes = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "include_component_entity_attributes", value: this.includeComponentAttributes}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Include Component Entity Attributes' })
+    },
+    mergeCoplanarFacesHandler(newValue){
+      this.mergeCoplanarFaces = !!newValue
+      sketchup.exec({
+        name: "model_preferences_updated",
+        data: {preference: "merge_coplanar_faces", value: this.mergeCoplanarFaces}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Merge Co-Planar Faces' })
+    },
+    switchTheme() {
+      this.$vuetify.theme.dark = !this.$vuetify.theme.dark
+      sketchup.exec({
+        name: "user_preferences_updated",
+        data: {preference_hash: "configSketchup", preference: "dark_theme", value: this.$vuetify.theme.dark}
+      })
+      this.$mixpanel.track('Connector Action', { name: 'Toggle Theme' })
+    },
+    refresh() {
+      this.$apollo.queries.user.refetch()
+      bus.$emit('refresh-streams')
+    }
+  }
+}
+</script>
+
+<style>
+
+</style>

ui/src/graphql/stream.gql

@@ -42,6 +42,7 @@ query Stream($id: String!) {
             branchName
             authorName
             authorAvatar
+            sourceApplication
             referencedObject
           }
         }

ui/src/plugins/speckle-metrics.js

@@ -10,9 +10,12 @@ const SpeckleMetrics = {
 
     Vue.prototype.$mixpanel = mixpanel
     Vue.prototype.$mixpanel.init(token, config)
-    Vue.prototype.$mixpanel.register({ hostApp: 'sketchup', type: 'action' })
 
     Vue.prototype.$refreshMixpanelIds = function () {
+      // 1. It logs out the user and removes out the registered props.
+      Vue.prototype.$mixpanel.reset()
+
+      // 2. create hashes for user distinction
       let distinctId =
         '@' +
         crypto
@@ -29,12 +32,20 @@ const SpeckleMetrics = {
         .digest('hex')
         .toUpperCase()
 
+      // 3. Setting super properties that will be sent with every event
       Vue.prototype.$mixpanel.register({
-        // eslint-disable-next-line camelcase
-        distinct_id: distinctId,
-        // eslint-disable-next-line camelcase
+        hostApp: 'sketchup',
+        type: 'action',
+        hostAppVersion: localStorage.getItem('hostAppVersion'),
+        core_version: localStorage.getItem('speckleVersion'),
         server_id: serverId
       })
+
+      // 4. Logging into user
+      Vue.prototype.$mixpanel.identify(distinctId)
+
+      // 5. If it is a registered user we can consider it is identified
+      Vue.prototype.$mixpanel.people.set("Identified", true)
     }
   }
 }

ui/src/plugins/vuetify.js

@@ -5,7 +5,7 @@ Vue.use(Vuetify)
 
 export default new Vuetify({
   theme: {
-    dark: localStorage.getItem('theme') === 'dark',
+    dark: false,
     themes: {
       light: {
         primary: '#0480FB', //speckle blue

ui/src/router/index.js

@@ -8,7 +8,7 @@ const routes = [
     path: '*',
     name: 'Streams',
     component: () => import('../views/Streams.vue')
-  }
+  },
 ]
 
 const router = new VueRouter({

ui/src/utils/hostApplications.js

@@ -0,0 +1,86 @@
+class HostApplication {
+    constructor(name, slug) {
+        this.name = name;
+        this.slug = slug;
+    }
+}
+
+/**
+ * Static class to retrieve host application names and their shortened name(slug).
+ * Call HostApplications.GetHostAppFromString(appname) method to get name and slug.
+ * @example
+ *    const hostApp = HostApplications.GetHostAppFromString("Revit2022")
+ *    console.log(hostApp.name) -> "Revit"
+ *    console.log(hostApp.slug) -> "revit"
+ */
+export class HostApplications {
+    static Rhino = new HostApplication("Rhino", "rhino");
+    static Grasshopper = new HostApplication("Grasshopper", "grasshopper");
+    static Revit = new HostApplication("Revit", "revit");
+    static Dynamo = new HostApplication("Dynamo", "dynamo");
+    static Unity = new HostApplication("Unity", "unity");
+    static GSA = new HostApplication("GSA", "gsa");
+    static Civil = new HostApplication("Civil 3D", "civil3d");
+    static AutoCAD = new HostApplication("AutoCAD", "autocad");
+    static MicroStation = new HostApplication("MicroStation", "microstation");
+    static OpenRoads = new HostApplication("OpenRoads", "openroads");
+    static OpenRail = new HostApplication("OpenRail", "openrail");
+    static OpenBuildings = new HostApplication("OpenBuildings", "openbuildings");
+    static ETABS = new HostApplication("ETABS", "etabs");
+    static SAP2000 = new HostApplication("SAP2000", "sap2000");
+    static CSIBridge = new HostApplication("CSIBridge", "csibridge");
+    static SAFE = new HostApplication("SAFE", "safe");
+    static TeklaStructures = new HostApplication("Tekla Structures", "teklastructures");
+    static Dxf = new HostApplication("DXF Converter", "dxf");
+    static Excel = new HostApplication("Excel", "excel");
+    static Unreal = new HostApplication("Unreal", "unreal");
+    static PowerBI = new HostApplication("Power BI", "powerbi");
+    static Blender = new HostApplication("Blender", "blender");
+    static QGIS = new HostApplication("QGIS", "qgis");
+    static ArcGIS = new HostApplication("ArcGIS", "arcgis");
+    static SketchUp = new HostApplication("SketchUp", "sketchup");
+    static Archicad = new HostApplication("Archicad", "archicad");
+    static TopSolid = new HostApplication("TopSolid", "topsolid");
+    static Python = new HostApplication("Python", "python");
+    static NET = new HostApplication(".NET", "net");
+    static Navisworks = new HostApplication("Navisworks", "navisworks");
+    static AdvanceSteel = new HostApplication("Advance Steel", "advancesteel");
+    static Other = new HostApplication("Other", "other");
+
+    static GetHostAppFromString(appname){
+        if (!appname) return HostApplications.Other;
+        appname = appname.toLowerCase().replace(/ /g, "");
+        if (appname.includes("dynamo")) return HostApplications.Dynamo;
+        if (appname.includes("revit")) return HostApplications.Revit;
+        if (appname.includes("autocad")) return HostApplications.AutoCAD;
+        if (appname.includes("civil")) return HostApplications.Civil;
+        if (appname.includes("rhino")) return HostApplications.Rhino;
+        if (appname.includes("grasshopper")) return HostApplications.Grasshopper;
+        if (appname.includes("unity")) return HostApplications.Unity;
+        if (appname.includes("gsa")) return HostApplications.GSA;
+        if (appname.includes("microstation")) return HostApplications.MicroStation;
+        if (appname.includes("openroads")) return HostApplications.OpenRoads;
+        if (appname.includes("openrail")) return HostApplications.OpenRail;
+        if (appname.includes("openbuildings")) return HostApplications.OpenBuildings;
+        if (appname.includes("etabs")) return HostApplications.ETABS;
+        if (appname.includes("sap")) return HostApplications.SAP2000;
+        if (appname.includes("csibridge")) return HostApplications.CSIBridge;
+        if (appname.includes("safe")) return HostApplications.SAFE;
+        if (appname.includes("teklastructures")) return HostApplications.TeklaStructures;
+        if (appname.includes("dxf")) return HostApplications.Dxf;
+        if (appname.includes("excel")) return HostApplications.Excel;
+        if (appname.includes("unreal")) return HostApplications.Unreal;
+        if (appname.includes("powerbi")) return HostApplications.PowerBI;
+        if (appname.includes("blender")) return HostApplications.Blender;
+        if (appname.includes("qgis")) return HostApplications.QGIS;
+        if (appname.includes("arcgis")) return HostApplications.ArcGIS;
+        if (appname.includes("sketchup")) return HostApplications.SketchUp;
+        if (appname.includes("archicad")) return HostApplications.Archicad;
+        if (appname.includes("topsolid")) return HostApplications.TopSolid;
+        if (appname.includes("python")) return HostApplications.Python;
+        if (appname.includes(".net")) return HostApplications.NET;
+        if (appname.includes("navisworks")) return HostApplications.Navisworks;
+        if (appname.includes("advancesteel")) return HostApplications.AdvanceSteel;
+        return appname;
+    }
+}

ui/src/utils/streamWrapper.js

@@ -0,0 +1,77 @@
+require('url')
+
+export class StreamWrapper {
+    constructor(streamIdOrUrl, accountId, serverUrl) {
+        this.originalOutput = streamIdOrUrl
+        try {
+            this.streamWrapperFromUrl(streamIdOrUrl)
+        }
+        catch (e){
+            this.serverUrl = serverUrl
+            this.userId = accountId
+            this.streamId = streamIdOrUrl
+        }
+    }
+
+    streamWrapperFromUrl(streamUrl){
+        this.url = new URL(streamUrl)
+        this.segments = this.url.pathname.split('/').map((segment) => segment + '/')
+        this.serverUrl = this.url.origin
+
+        if (this.segments.length >= 4 && this.segments[3]?.toLowerCase() === "branches/"){
+            this.streamId = this.segments[2].replace("/", "")
+            if (this.segments.length > 5)
+            {
+                let branchSegments = this.segments.slice(4, this.segments.length - 1);
+                this.branchName = branchSegments.join("")
+            }
+            else
+            {
+                this.branchName = this.segments[4]
+            }
+        } else {
+            switch (this.segments.length){
+                case 3: // ie http://speckle.server/streams/8fecc9aa6d
+                    if (this.segments[1].toLowerCase() === "streams/")
+                        this.streamId = this.segments[2].replace("/", "");
+                    else
+                        throw new Error(`Cannot parse ${this.originalOutput} into a stream wrapper class`);
+                    break;
+                case 4: // ie https://speckle.server/streams/0c6ad366c4/globals/
+                    if (this.segments[3].toLowerCase().startsWith("globals"))
+                    {
+                        this.streamId = this.segments[2].replace("/", "");
+                        this.branchName = this.segments[3].replace("/", "");
+                    }
+                    else
+                        throw new Error(`Cannot parse ${this.originalOutput} into a stream wrapper class`);
+                    break;
+                case 5: // ie http://speckle.server/streams/8fecc9aa6d/commits/76a23d7179
+                    switch (this.segments[3].toLowerCase()){
+                        case "commits/":
+                            this.streamId = this.segments[2].replace("/", "");
+                            this.commitId = this.segments[4].replace("/", "");
+                            break;
+                        case "globals/":
+                            this.streamId = this.segments[2].replace("/", "");
+                            this.branchName = this.segments[3].replace("/", "");
+                            this.commitId = this.segments[4].replace("/", "");
+                            break;
+                        case "branches/":
+                            this.streamId = this.segments[2].replace("/", "");
+                            this.branchName = this.segments[4].replace("/", "");
+                            break;
+                        case "objects/":
+                            this.streamId = this.segments[2].replace("/", "");
+                            this.objectId = this.segments[4].replace("/", "");
+                            break;
+                        default:
+                            throw new Error(`Cannot parse ${this.originalOutput} into a stream wrapper class`);
+                    }
+                    break;
+                default:
+                    throw new Error(`Cannot parse ${this.originalOutput} into a stream wrapper class`);
+            }
+        }
+    }
+}