feat(workspaces): leave workspace (#2585)

packages/server/modules/workspaces/graph/resolvers/workspaces.ts

@@ -514,6 +514,29 @@ export = FF_WORKSPACES_MODULE_ENABLED
         workspaceList: async () => {
           throw new WorkspacesNotYetImplementedError()
         }
+      },
+      ActiveUserMutations: {
+        workspaceMutations: () => ({})
+      },
+      UserWorkspaceMutations: {
+        leave: async (parent, args, ctx) => {
+          const userId = ctx.userId!
+
+          const getWorkspaceRoles = getWorkspaceRolesFactory({ db })
+          const emitWorkspaceEvent = getEventBus().emit
+
+          const deleteWorkspaceRole = deleteWorkspaceRoleFactory({
+            deleteWorkspaceRole: repoDeleteWorkspaceRoleFactory({ db }),
+            getWorkspaceRoles,
+            emitWorkspaceEvent,
+            getStreams,
+            revokeStreamPermissions
+          })
+
+          await deleteWorkspaceRole({ workspaceId: args.id, userId })
+
+          return true
+        }
       }
     } as Resolvers)
   : {}