Update filter conformance classes (#417)

* Update filter.py

* Update stac_fastapi/extensions/stac_fastapi/extensions/core/filter/filter.py

* Update item search filter conformance class

* Update filter conformance class, add features filter conformance class

* linting

Co-authored-by: Jeff Albrecht <[email protected]>
Co-authored-by: Jeff Albrecht <[email protected]>

Author: m-mohr

stac_fastapi/extensions/stac_fastapi/extensions/core/filter/filter.py

@@ -26,10 +26,11 @@ class FilterConformanceClasses(str, Enum):
     See https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.1/fragments/filter
     """
 
-    FILTER = "https://api.stacspec.org/v1.0.0-rc.1/item-search#filter:filter"
-    ITEM_SEARCH_FILTER = (
-        "https://api.stacspec.org/v1.0.0-rc.1/item-search#filter:item-search-filter"
+    FILTER = "http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/filter"
+    FEATURES_FILTER = (
+        "http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/features-filter"
     )
+    ITEM_SEARCH_FILTER = "https://api.stacspec.org/v1.0.0-rc.1/item-search#filter"
     CQL_TEXT = "https://api.stacspec.org/v1.0.0-rc.1/item-search#filter:cql-text"
     CQL_JSON = "https://api.stacspec.org/v1.0.0-rc.1/item-search#filter:cql-json"
     BASIC_CQL = "https://api.stacspec.org/v1.0.0-rc.1/item-search#filter:basic-cql"
@@ -70,6 +71,7 @@ class FilterExtension(ApiExtension):
     conformance_classes: List[str] = attr.ib(
         default=[
             FilterConformanceClasses.FILTER,
+            FilterConformanceClasses.FEATURES_FILTER,
             FilterConformanceClasses.ITEM_SEARCH_FILTER,
             FilterConformanceClasses.BASIC_CQL,
             FilterConformanceClasses.CQL_TEXT,