Use serializer to document the API endpoint

api/catalog/api/docs/audio_docs.py

@@ -31,6 +31,7 @@
     InputErrorSerializer,
     NotFoundErrorSerializer,
 )
+from catalog.api.serializers.media_serializers import MediaThumbnailRequestSerializer
 from catalog.api.serializers.provider_serializers import ProviderSerializer
 from drf_yasg import openapi
 
@@ -206,3 +207,17 @@ class AudioComplain(MediaComplain):
         "responses": responses,
         "code_examples": code_examples,
     }
+
+
+class AudioThumbnail:
+    desc = f"""
+thumbnail is an API endpoint to retrieve the scaled down and compressed thumbnail
+of the artwork of an audio track or its audio set.
+
+{refer_sample}"""  # noqa
+
+    swagger_setup = {
+        "operation_id": "audio_thumbnail",
+        "operation_description": desc,
+        "query_serializer": MediaThumbnailRequestSerializer,
+    }

api/catalog/api/docs/image_docs.py

@@ -37,6 +37,7 @@
     OembedRequestSerializer,
     OembedSerializer,
 )
+from catalog.api.serializers.media_serializers import MediaThumbnailRequestSerializer
 from catalog.api.serializers.provider_serializers import ProviderSerializer
 from drf_yasg import openapi
 
@@ -240,3 +241,17 @@ class ImageOembed:
         "responses": responses,
         "code_examples": code_examples,
     }
+
+
+class ImageThumbnail:
+    desc = f"""
+thumbnail is an API endpoint to retrieve the scaled down and compressed thumbnail
+of an image.
+
+{refer_sample}"""  # noqa
+
+    swagger_setup = {
+        "operation_id": "image_thumbnail",
+        "operation_description": desc,
+        "query_serializer": MediaThumbnailRequestSerializer,
+    }

api/catalog/api/serializers/media_serializers.py

@@ -1,3 +1,4 @@
+import logging as log
 from collections import namedtuple
 from urllib.parse import urlparse
 
@@ -420,3 +421,32 @@ class MediaSearchSerializer(serializers.Serializer):
     page = serializers.IntegerField(
         help_text="The current page number returned in the response."
     )
+
+
+class MediaThumbnailRequestSerializer(serializers.Serializer):
+    """
+    This serializer parses and validates thumbnail query string parameters.
+    """
+
+    full_size = serializers.BooleanField(
+        source="is_full_size",
+        allow_null=True,
+        required=False,
+        default=False,
+        help_text="whether to render the actual image and not a thumbnail version",
+    )
+    compressed = serializers.BooleanField(
+        source="is_compressed",
+        allow_null=True,
+        default=None,
+        required=False,
+        help_text="whether to compress the output image to reduce file size,"
+        "defaults to opposite of `full_size`",
+    )
+
+    def validate(self, data):
+        log.info(f"MediaThumbnailRequestSerializer data: {data}")
+        if data.get("is_compressed") is None:
+            data["is_compressed"] = not data["is_full_size"]
+        log.info(f"MediaThumbnailRequestSerializer validated data: {data}")
+        return data

api/catalog/api/views/audio_views.py

@@ -6,6 +6,7 @@
     AudioRelated,
     AudioSearch,
     AudioStats,
+    AudioThumbnail,
 )
 from catalog.api.models import Audio
 from catalog.api.serializers.audio_serializers import (
@@ -14,6 +15,7 @@
     AudioSerializer,
     AudioWaveformSerializer,
 )
+from catalog.api.serializers.media_serializers import MediaThumbnailRequestSerializer
 from catalog.api.utils.exceptions import get_api_exception
 from catalog.api.utils.throttle import OneThousandPerMinute
 from catalog.api.views.media_views import MediaViewSet
@@ -31,7 +33,7 @@
 @method_decorator(swagger_auto_schema(**AudioDetail.swagger_setup), "retrieve")
 @method_decorator(swagger_auto_schema(**AudioRelated.swagger_setup), "related")
 @method_decorator(swagger_auto_schema(**AudioComplain.swagger_setup), "report")
-@method_decorator(swagger_auto_schema(auto_schema=None), "thumbnail")
+@method_decorator(swagger_auto_schema(**AudioThumbnail.swagger_setup), "thumbnail")
 @method_decorator(swagger_auto_schema(auto_schema=None), "waveform")
 class AudioViewSet(MediaViewSet):
     """
@@ -51,6 +53,7 @@ class AudioViewSet(MediaViewSet):
         detail=True,
         url_path="thumb",
         url_name="thumb",
+        serializer_class=MediaThumbnailRequestSerializer,
         throttle_classes=[OneThousandPerMinute],
     )
     def thumbnail(self, request, *_, **__):

api/catalog/api/views/image_views.py

@@ -11,6 +11,7 @@
     ImageRelated,
     ImageSearch,
     ImageStats,
+    ImageThumbnail,
 )
 from catalog.api.models import Image
 from catalog.api.serializers.image_serializers import (
@@ -21,6 +22,7 @@
     OembedSerializer,
     WatermarkRequestSerializer,
 )
+from catalog.api.serializers.media_serializers import MediaThumbnailRequestSerializer
 from catalog.api.utils import ccrel
 from catalog.api.utils.exceptions import get_api_exception
 from catalog.api.utils.throttle import OneThousandPerMinute
@@ -44,7 +46,7 @@
 @method_decorator(swagger_auto_schema(**ImageRelated.swagger_setup), "related")
 @method_decorator(swagger_auto_schema(**ImageComplain.swagger_setup), "report")
 @method_decorator(swagger_auto_schema(**ImageOembed.swagger_setup), "oembed")
-@method_decorator(swagger_auto_schema(auto_schema=None), "thumbnail")
+@method_decorator(swagger_auto_schema(**ImageThumbnail.swagger_setup), "thumbnail")
 @method_decorator(swagger_auto_schema(auto_schema=None), "watermark")
 class ImageViewSet(MediaViewSet):
     """
@@ -93,6 +95,7 @@ def oembed(self, request, *_, **__):
         detail=True,
         url_path="thumb",
         url_name="thumb",
+        serializer_class=MediaThumbnailRequestSerializer,
         throttle_classes=[OneThousandPerMinute],
     )
     def thumbnail(self, request, *_, **__):

api/catalog/api/views/media_views.py

@@ -1,6 +1,5 @@
 import json
 import logging as log
-from distutils.util import strtobool
 from urllib.error import HTTPError
 from urllib.parse import urlencode
 from urllib.request import urlopen
@@ -129,15 +128,10 @@ def report(self, request, *_, **__):
         return Response(data=serializer.data, status=status.HTTP_201_CREATED)
 
     def thumbnail(self, image_url, request, *_, **__):
-        full_size_param = request.query_params.get("full_size", "false").lower()
-        is_full_size = strtobool(full_size_param)
-        compressed_param = request.query_params.get(
-            "compressed",
-            "false" if is_full_size else "true",
-        ).lower()
-        is_compressed = strtobool(compressed_param)
-
-        return self._get_proxied_image(image_url, is_full_size, is_compressed)
+        serializer = self.get_serializer(data=request.query_params)
+        if not serializer.is_valid():
+            raise get_api_exception("Invalid input.", 400)
+        return self._get_proxied_image(image_url, **serializer.validated_data)
 
     # Helper functions