From a8f656405d5f475a6b0bef7c1fcaa6d0e07fb2a9 Mon Sep 17 00:00:00 2001
From: Tom Kralidis <tomkralidis@gmail.com>
Date: Wed, 27 Oct 2021 20:37:06 -0400
Subject: [PATCH] implement base EDR provider

---
 pygeoapi/provider/base_edr.py   | 85 +++++++++++++++++++++++++++++++++
 pygeoapi/provider/xarray_edr.py | 14 ++----
 2 files changed, 88 insertions(+), 11 deletions(-)
 create mode 100644 pygeoapi/provider/base_edr.py

diff --git a/pygeoapi/provider/base_edr.py b/pygeoapi/provider/base_edr.py
new file mode 100644
index 0000000..1849b87
--- /dev/null
+++ b/pygeoapi/provider/base_edr.py
@@ -0,0 +1,85 @@
+# =================================================================
+#
+# Authors: Tom Kralidis <tomkralidis@gmail.com>
+#
+# Copyright (c) 2021 Tom Kralidis
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation
+# files (the "Software"), to deal in the Software without
+# restriction, including without limitation the rights to use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following
+# conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+#
+# =================================================================
+
+import logging
+
+from pygeoapi.provider.base import BaseProvider
+
+LOGGER = logging.getLogger(__name__)
+
+
+class BaseEDRProvider(BaseProvider):
+    """Base EDR Provider"""
+
+    def __init__(self, provider_def):
+        """
+        Initialize object
+
+        :param provider_def: provider definition
+
+        :returns: pygeoapi.provider.base_edr.BaseEDRProvider
+        """
+
+        super().__init__(provider_def)
+
+        self.instances = []
+
+    def get_instance(self, instance):
+        """
+        Validate instance identifier
+
+        :returns: `bool` of whether instance is valid
+        """
+
+        return NotImplementedError()
+
+    def get_query_types(self):
+        """
+        Provide supported query types
+
+        :returns: `list` of EDR query types
+        """
+
+        return NotImplementedError()
+
+    def query(self, **kwargs):
+        """
+        Extract data from collection collection
+
+        :param query_type: query type
+        :param wkt: `shapely.geometry` WKT geometry
+        :param datetime_: temporal (datestamp or extent)
+        :param select_properties: list of parameters
+        :param z: vertical level(s)
+        :param format_: data format of output
+
+        :returns: coverage data as `dict` of CoverageJSON or native format
+        """
+
+        return NotImplementedError()
diff --git a/pygeoapi/provider/xarray_edr.py b/pygeoapi/provider/xarray_edr.py
index d8e5d0c..6fb0cae 100644
--- a/pygeoapi/provider/xarray_edr.py
+++ b/pygeoapi/provider/xarray_edr.py
@@ -30,12 +30,13 @@
 import logging
 
 from pygeoapi.provider.base import ProviderNoDataError
+from pygeoapi.provider.base_edr import BaseEDRProvider
 from pygeoapi.provider.xarray_ import _to_datetime_string, XarrayProvider
 
 LOGGER = logging.getLogger(__name__)
 
 
-class XarrayEDRProvider(XarrayProvider):
+class XarrayEDRProvider(BaseEDRProvider, XarrayProvider):
     """EDR Provider"""
 
     def __init__(self, provider_def):
@@ -47,8 +48,8 @@ class XarrayEDRProvider(XarrayProvider):
         :returns: pygeoapi.provider.rasterio_.RasterioProvider
         """
 
+        BaseEDRProvider.__init__(self, provider_def)
         XarrayProvider.__init__(self, provider_def)
-        self.instances = []
 
     def get_fields(self):
         """
@@ -59,15 +60,6 @@ class XarrayEDRProvider(XarrayProvider):
 
         return self.get_coverage_rangetype()
 
-    def get_instance(self, instance):
-        """
-        Validate instance identifier
-
-        :returns: `bool` of whether instance is valid
-        """
-
-        return NotImplementedError()
-
     def get_query_types(self):
         """
         Provide supported query types