refactored conformance classes for extensions (#790)

* refactored conformance classes for extensions

* update changelog

CHANGES.md

@@ -2,6 +2,22 @@
 
 ## [Unreleased]
 
+### Changed
+
+- refactored conformance classes for extensions
+
+  - renamed `collection_search.ConformanceClasses` -> `collection_search.CollectionSearchConformanceClasses`
+  - removed `FREETEXT`, `FILTER`, `QUERY`, `SORT` and `FIELDS` entries from the `CollectionSearchConformanceClasses` Enum (and moved to each extension's Enum)
+  - changed `collection_search.CollectionSearchPostExtension.from_extension(ext)` to use the conformance classes from the input extensions to derive the output conformance classes.
+  - added `fields.FieldsConformanceClasses` Enum
+  - renamed `filter.FilterConformanceClasses.FEATURES_FILTER` -> `filter.FilterConformanceClasses.ITEMS`
+  - renamed `filter.FilterConformanceClasses.ITEM_SEARCH_FILTER` -> `filter.FilterConformanceClasses.SEARCH`
+  - added `filter.FilterConformanceClasses.COLLECTIONS`
+  - added `filter.SearchFilterExtension`, `filter.ItemCollectionFilterExtension` and `filter.CollectionSearchFilterExtension` endpoint specific extensions
+  - removed `FreeTextConformanceClasses.COLLECTIONS` and `FreeTextConformanceClasses.ITEMS` in `FreeTextExtension` and `FreeTextAdvancedExtension` default conformances classes
+  - added `query.QueryConformanceClasses` Enum
+  - added `SortConformanceClasses` Enum
+
 ## [4.0.1] - 2025-01-23
 
 ### Changed

stac_fastapi/extensions/stac_fastapi/extensions/core/__init__.py

@@ -3,7 +3,12 @@
 from .aggregation import AggregationExtension
 from .collection_search import CollectionSearchExtension, CollectionSearchPostExtension
 from .fields import FieldsExtension
-from .filter import FilterExtension
+from .filter import (
+    CollectionSearchFilterExtension,
+    FilterExtension,
+    ItemCollectionFilterExtension,
+    SearchFilterExtension,
+)
 from .free_text import FreeTextAdvancedExtension, FreeTextExtension
 from .pagination import (
     OffsetPaginationExtension,
@@ -28,4 +33,7 @@
     "TransactionExtension",
     "CollectionSearchExtension",
     "CollectionSearchPostExtension",
+    "SearchFilterExtension",
+    "ItemCollectionFilterExtension",
+    "CollectionSearchFilterExtension",
 )

stac_fastapi/extensions/stac_fastapi/extensions/core/aggregation/__init__.py

@@ -1,5 +1,5 @@
 """Aggregation extension module."""
 
-from .aggregation import AggregationExtension
+from .aggregation import AggregationConformanceClasses, AggregationExtension
 
-__all__ = ["AggregationExtension"]
+__all__ = ["AggregationExtension", "AggregationConformanceClasses"]

stac_fastapi/extensions/stac_fastapi/extensions/core/collection_search/__init__.py

@@ -1,13 +1,13 @@
 """Collection-Search extension module."""
 
 from .collection_search import (
+    CollectionSearchConformanceClasses,
     CollectionSearchExtension,
     CollectionSearchPostExtension,
-    ConformanceClasses,
 )
 
 __all__ = [
     "CollectionSearchExtension",
     "CollectionSearchPostExtension",
-    "ConformanceClasses",
+    "CollectionSearchConformanceClasses",
 ]

stac_fastapi/extensions/stac_fastapi/extensions/core/collection_search/collection_search.py

@@ -17,7 +17,7 @@
 from .request import BaseCollectionSearchGetRequest, BaseCollectionSearchPostRequest
 
 
-class ConformanceClasses(str, Enum):
+class CollectionSearchConformanceClasses(str, Enum):
     """Conformance classes for the Collection-Search extension.
 
     See
@@ -26,11 +26,6 @@ class ConformanceClasses(str, Enum):
 
     COLLECTIONSEARCH = "https://api.stacspec.org/v1.0.0-rc.1/collection-search"
     BASIS = "http://www.opengis.net/spec/ogcapi-common-2/1.0/conf/simple-query"
-    FREETEXT = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#free-text"
-    FILTER = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#filter"
-    QUERY = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#query"
-    SORT = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#sort"
-    FIELDS = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#fields"
 
 
 @attr.s
@@ -56,7 +51,10 @@ class CollectionSearchExtension(ApiExtension):
     POST = None
 
     conformance_classes: List[str] = attr.ib(
-        default=[ConformanceClasses.COLLECTIONSEARCH, ConformanceClasses.BASIS]
+        default=[
+            CollectionSearchConformanceClasses.COLLECTIONSEARCH,
+            CollectionSearchConformanceClasses.BASIS,
+        ]
     )
     schema_href: Optional[str] = attr.ib(default=None)
 
@@ -78,21 +76,13 @@ def from_extensions(
         schema_href: Optional[str] = None,
     ) -> "CollectionSearchExtension":
         """Create CollectionSearchExtension object from extensions."""
-        known_extension_conformances = {
-            "FreeTextExtension": ConformanceClasses.FREETEXT,
-            "FreeTextAdvancedExtension": ConformanceClasses.FREETEXT,
-            "QueryExtension": ConformanceClasses.QUERY,
-            "SortExtension": ConformanceClasses.SORT,
-            "FieldsExtension": ConformanceClasses.FIELDS,
-            "FilterExtension": ConformanceClasses.FILTER,
-        }
+
         conformance_classes = [
-            ConformanceClasses.COLLECTIONSEARCH,
-            ConformanceClasses.BASIS,
+            CollectionSearchConformanceClasses.COLLECTIONSEARCH,
+            CollectionSearchConformanceClasses.BASIS,
         ]
         for ext in extensions:
-            if conf := known_extension_conformances.get(ext.__class__.__name__, None):
-                conformance_classes.append(conf)
+            conformance_classes.extend(ext.conformance_classes)
 
         get_request_model = create_request_model(
             model_name="CollectionsGetRequest",
@@ -128,7 +118,10 @@ class CollectionSearchPostExtension(CollectionSearchExtension):
     client: Union[AsyncBaseCollectionSearchClient, BaseCollectionSearchClient] = attr.ib()
     settings: ApiSettings = attr.ib()
     conformance_classes: List[str] = attr.ib(
-        default=[ConformanceClasses.COLLECTIONSEARCH, ConformanceClasses.BASIS]
+        default=[
+            CollectionSearchConformanceClasses.COLLECTIONSEARCH,
+            CollectionSearchConformanceClasses.BASIS,
+        ]
     )
     schema_href: Optional[str] = attr.ib(default=None)
     router: APIRouter = attr.ib(factory=APIRouter)
@@ -180,21 +173,12 @@ def from_extensions(
         router: Optional[APIRouter] = None,
     ) -> "CollectionSearchPostExtension":
         """Create CollectionSearchPostExtension object from extensions."""
-        known_extension_conformances = {
-            "FreeTextExtension": ConformanceClasses.FREETEXT,
-            "FreeTextAdvancedExtension": ConformanceClasses.FREETEXT,
-            "QueryExtension": ConformanceClasses.QUERY,
-            "SortExtension": ConformanceClasses.SORT,
-            "FieldsExtension": ConformanceClasses.FIELDS,
-            "FilterExtension": ConformanceClasses.FILTER,
-        }
         conformance_classes = [
-            ConformanceClasses.COLLECTIONSEARCH,
-            ConformanceClasses.BASIS,
+            CollectionSearchConformanceClasses.COLLECTIONSEARCH,
+            CollectionSearchConformanceClasses.BASIS,
         ]
         for ext in extensions:
-            if conf := known_extension_conformances.get(ext.__class__.__name__, None):
-                conformance_classes.append(conf)
+            conformance_classes.extend(ext.conformance_classes)
 
         get_request_model = create_request_model(
             model_name="CollectionsGetRequest",

stac_fastapi/extensions/stac_fastapi/extensions/core/fields/__init__.py

@@ -1,5 +1,5 @@
 """Fields extension module."""
 
-from .fields import FieldsExtension
+from .fields import FieldsConformanceClasses, FieldsExtension
 
-__all__ = ["FieldsExtension"]
+__all__ = ["FieldsExtension", "FieldsConformanceClasses"]

stac_fastapi/extensions/stac_fastapi/extensions/core/fields/fields.py

@@ -1,5 +1,6 @@
 """Fields extension."""
 
+from enum import Enum
 from typing import List, Optional
 
 import attr
@@ -10,6 +11,18 @@
 from .request import FieldsExtensionGetRequest, FieldsExtensionPostRequest
 
 
+class FieldsConformanceClasses(str, Enum):
+    """Conformance classes for the Fields extension.
+
+    See https://github.com/stac-api-extensions/fields
+
+    """
+
+    SEARCH = "https://api.stacspec.org/v1.0.0/item-search#fields"
+    ITEMS = "https://api.stacspec.org/v1.0.0/ogcapi-features#fields"
+    COLLECTIONS = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#fields"
+
+
 @attr.s
 class FieldsExtension(ApiExtension):
     """Fields Extension.
@@ -33,7 +46,9 @@ class FieldsExtension(ApiExtension):
     POST = FieldsExtensionPostRequest
 
     conformance_classes: List[str] = attr.ib(
-        factory=lambda: ["https://api.stacspec.org/v1.0.0/item-search#fields"]
+        factory=lambda: [
+            FieldsConformanceClasses.SEARCH,
+        ]
     )
     schema_href: Optional[str] = attr.ib(default=None)
 

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

@@ -1,5 +1,17 @@
 """Filter extension module."""
 
-from .filter import FilterExtension
+from .filter import (
+    CollectionSearchFilterExtension,
+    FilterConformanceClasses,
+    FilterExtension,
+    ItemCollectionFilterExtension,
+    SearchFilterExtension,
+)
 
-__all__ = ["FilterExtension"]
+__all__ = [
+    "FilterConformanceClasses",
+    "FilterExtension",
+    "SearchFilterExtension",
+    "ItemCollectionFilterExtension",
+    "CollectionSearchFilterExtension",
+]

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

@@ -23,10 +23,11 @@ class FilterConformanceClasses(str, Enum):
     """
 
     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.2/item-search#filter"
+
+    SEARCH = "https://api.stacspec.org/v1.0.0-rc.2/item-search#filter"
+    ITEMS = "http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/features-filter"
+    COLLECTIONS = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#filter"
+
     CQL2_TEXT = "http://www.opengis.net/spec/cql2/1.0/conf/cql2-text"
     CQL2_JSON = "http://www.opengis.net/spec/cql2/1.0/conf/cql2-json"
     BASIC_CQL2 = "http://www.opengis.net/spec/cql2/1.0/conf/basic-cql2"
@@ -73,8 +74,8 @@ class FilterExtension(ApiExtension):
     conformance_classes: List[str] = attr.ib(
         default=[
             FilterConformanceClasses.FILTER,
-            FilterConformanceClasses.FEATURES_FILTER,
-            FilterConformanceClasses.ITEM_SEARCH_FILTER,
+            FilterConformanceClasses.SEARCH,
+            FilterConformanceClasses.ITEMS,
             FilterConformanceClasses.BASIC_CQL2,
             FilterConformanceClasses.CQL2_JSON,
             FilterConformanceClasses.CQL2_TEXT,
@@ -124,3 +125,112 @@ def register(self, app: FastAPI) -> None:
             endpoint=create_async_endpoint(self.client.get_queryables, CollectionUri),
         )
         app.include_router(self.router, tags=["Filter Extension"])
+
+
+@attr.s
+class SearchFilterExtension(FilterExtension):
+    """Item Search Filter Extension."""
+
+    conformance_classes: List[str] = attr.ib(
+        default=[
+            FilterConformanceClasses.FILTER,
+            FilterConformanceClasses.SEARCH,
+            FilterConformanceClasses.BASIC_CQL2,
+            FilterConformanceClasses.CQL2_JSON,
+            FilterConformanceClasses.CQL2_TEXT,
+        ]
+    )
+
+    def register(self, app: FastAPI) -> None:
+        """Register the extension with a FastAPI application.
+
+        Args:
+            app: target FastAPI application.
+
+        Returns:
+            None
+        """
+        self.router.prefix = app.state.router_prefix
+        self.router.add_api_route(
+            name="Queryables",
+            path="/queryables",
+            methods=["GET"],
+            responses={
+                200: {
+                    "content": {
+                        "application/schema+json": {},
+                    },
+                    # TODO: add output model in stac-pydantic
+                },
+            },
+            response_class=self.response_class,
+            endpoint=create_async_endpoint(self.client.get_queryables, EmptyRequest),
+        )
+        app.include_router(self.router, tags=["Filter Extension"])
+
+
+@attr.s
+class ItemCollectionFilterExtension(FilterExtension):
+    """Item Collection Filter Extension."""
+
+    conformance_classes: List[str] = attr.ib(
+        default=[
+            FilterConformanceClasses.FILTER,
+            FilterConformanceClasses.ITEMS,
+            FilterConformanceClasses.BASIC_CQL2,
+            FilterConformanceClasses.CQL2_JSON,
+            FilterConformanceClasses.CQL2_TEXT,
+        ]
+    )
+
+    def register(self, app: FastAPI) -> None:
+        """Register the extension with a FastAPI application.
+
+        Args:
+            app: target FastAPI application.
+
+        Returns:
+            None
+        """
+        self.router.add_api_route(
+            name="Collection Queryables",
+            path="/collections/{collection_id}/queryables",
+            methods=["GET"],
+            responses={
+                200: {
+                    "content": {
+                        "application/schema+json": {},
+                    },
+                    # TODO: add output model in stac-pydantic
+                },
+            },
+            response_class=self.response_class,
+            endpoint=create_async_endpoint(self.client.get_queryables, CollectionUri),
+        )
+        app.include_router(self.router, tags=["Filter Extension"])
+
+
+@attr.s
+class CollectionSearchFilterExtension(FilterExtension):
+    """Collection Search Filter Extension."""
+
+    conformance_classes: List[str] = attr.ib(
+        default=[
+            FilterConformanceClasses.FILTER,
+            FilterConformanceClasses.COLLECTIONS,
+            FilterConformanceClasses.BASIC_CQL2,
+            FilterConformanceClasses.CQL2_JSON,
+            FilterConformanceClasses.CQL2_TEXT,
+        ]
+    )
+
+    def register(self, app: FastAPI) -> None:
+        """Register the extension with a FastAPI application.
+
+        Args:
+            app: target FastAPI application.
+
+        Returns:
+            None
+        """
+        pass