Add Support for OGC API - Styles

pygeoapi/api/__init__.py

@@ -133,16 +133,17 @@ def all_apis() -> dict:
     """
 
     from . import (coverages, environmental_data_retrieval, itemtypes, maps,
-                   processes, tiles, stac)
+                   processes, styles, tiles, stac)
 
     return {
         'coverage': coverages,
         'edr': environmental_data_retrieval,
         'itemtypes': itemtypes,
         'map': maps,
         'process': processes,
+        'style': styles,
         'tile': tiles,
-        'stac': stac
+        'stac': stac,
     }
 
 

pygeoapi/api/styles.py

@@ -0,0 +1,112 @@
+# =================================================================
+
+# Authors: Joana Simoes <[email protected]>
+#
+# Copyright (c) 2024 Joana Simoes
+#
+# 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 http import HTTPStatus
+from typing import Tuple
+
+from pygeoapi.util import to_json
+
+from . import APIRequest, API, F_JSON, SYSTEM_LOCALE
+
+LOGGER = logging.getLogger(__name__)
+
+CONFORMANCE_CLASSES = [
+    'http://www.opengis.net/spec/ogcapi-styles-1/0.0/conf/core',
+    'http://www.opengis.net/spec/ogcapi-styles-1/0.0/conf/html',
+    'http://www.opengis.net/spec/ogcapi-styles-1/0.0/conf/mapbox-style'
+]
+
+
+def get_styles(api: API, request: APIRequest) -> Tuple[dict, int, str]:
+    """
+    Fetches the set of styles available.
+    For each style it returns the id, a title, links to the stylesheet of the style # noqa 
+    in each supported encoding, and the link to the metadata.
+
+    :param request: A request object
+
+    :returns: tuple of headers, status code, content
+    """
+
+    format_ = request.format or F_JSON
+
+    # Force response content type and language (en-US only) headers
+    headers = request.get_response_headers(SYSTEM_LOCALE, **api.api_headers)
+
+    # TODO: implement this
+
+    data = '{"styles": [{"title": "night", "id": "night"}]}'
+
+    if format_ == F_JSON:
+        headers['Content-Type'] = 'application/json'
+        return headers, HTTPStatus.OK, to_json(data, api.pretty_print)
+    else:
+        return api.get_format_exception(request)
+
+
+def get_oas_30(cfg: dict, locale: str) -> tuple[list[dict[str, str]], dict[str, dict]]:  # noqa
+    """
+    Get OpenAPI fragments
+
+    :param cfg: `dict` of configuration
+    :param locale: `str` of locale
+
+    :returns: `tuple` of `list` of tag objects, and `dict` of path objects
+    """
+
+    from pygeoapi.openapi import OPENAPI_YAML
+
+    paths = {}
+
+    paths['/styles'] = {
+        'get': {
+            'summary': 'lists the available styles',
+            'description': 'This operation fetches the set of styles available.', # noqa
+            'tags': ['Discover and fetch styles'],
+            'operationId': 'getStyles',
+            'externalDocs': {
+                'description': 'The specification that describes this operation: OGC API - Styles (DRAFT)', # noqa
+                'url': 'https://docs.ogc.org/DRAFTS/20-009.html'
+                },
+            'parameters': [
+                {'$ref': '#/components/parameters/access_token'},
+                {'$ref': '#/components/parameters/fStyles'}
+            ],
+            'responses': {
+                '200': {'$ref': f"{OPENAPI_YAML['oapif-1']}#/components/responses/Features"},  # noqa
+                '400': {'$ref': f"{OPENAPI_YAML['oapif-1']}#/components/responses/InvalidParameter"},  # noqa
+                # TODO: add 406
+                '500': {'$ref': f"{OPENAPI_YAML['oapif-1']}#/components/responses/ServerError"}  # noqa
+            }
+        }
+    }
+
+    return [{'name': 'styles'}], {'paths': paths}

pygeoapi/flask_app.py

@@ -45,6 +45,7 @@
 import pygeoapi.api.processes as processes_api
 import pygeoapi.api.stac as stac_api
 import pygeoapi.api.tiles as tiles_api
+import pygeoapi.api.styles as styles_api
 from pygeoapi.openapi import load_openapi_document
 from pygeoapi.config import get_config
 from pygeoapi.util import get_mimetype, get_api_rules
@@ -523,6 +524,16 @@ def get_collection_edr_query(collection_id, instance_id=None,
     )
 
 
+@BLUEPRINT.route('/styles')
+def styles_api_my_function():
+    """
+    Get Styles endpoint
+    :returns: HTTP response
+    """
+
+    return execute_from_flask(styles_api.get_styles, request)
+
+
 @BLUEPRINT.route('/stac')
 def stac_catalog_root():
     """