feat(podcast, video): add audio and video file URL retrieval in serializers

- Introduced `audio_file` and `video_file` SerializerMethodFields in PodcastListSerializer and VideoListSerializer, respectively.
- Implemented methods to return the full URL for audio and video files if they exist, enhancing the API response with direct access to media files.
- Updated fields in both serializers to include the new file attributes, improving the data structure for clients consuming the API.

apps/podcast/serializers.py

@@ -17,15 +17,26 @@ class PodcastCategoryListSerializer(serializers.ModelSerializer):
 
 class PodcastListSerializer(serializers.ModelSerializer):
     thumbnail = serializers.SerializerMethodField()
+    audio_file = serializers.SerializerMethodField()
     in_user_playlist = serializers.SerializerMethodField()
 
     class Meta:
         model = Podcast
-        fields = ['id', 'title', 'slug', 'thumbnail', 'description', 'audio_time', 'view_count', 'created_at', 'in_user_playlist']
+        fields = ['id', 'title', 'slug', 'thumbnail', 'description', 'audio_file',
+                  'audio_time', 'view_count', 'created_at', 'in_user_playlist']
 
     def get_thumbnail(self, obj):
         return get_thumbs(obj.thumbnail, self.context.get('request'))
 
+    def get_audio_file(self, obj):
+        """Get full URL for audio file if it exists"""
+        if obj.audio_file:
+            request = self.context.get('request')
+            if request:
+                return request.build_absolute_uri(obj.audio_file.url)
+            return obj.audio_file.url
+        return None
+
     def get_in_user_playlist(self, obj):
         """
         Check if the podcast is in the user's personal playlist.

apps/video/serializers.py

@@ -17,14 +17,25 @@ class VideoCategoryListSerializer(serializers.ModelSerializer):
 
 class VideoListSerializer(serializers.ModelSerializer):
     thumbnail = serializers.SerializerMethodField()
+    video_file = serializers.SerializerMethodField()
 
     class Meta:
         model = Video
-        fields = ['id', 'title', 'slug', 'thumbnail', 'description', 'video_time', 'view_count', 'created_at']
+        fields = ['id', 'title', 'slug', 'thumbnail', 'description', 'video_type',
+                  'video_file', 'video_url', 'video_time', 'view_count', 'created_at']
 
     def get_thumbnail(self, obj):
         return get_thumbs(obj.thumbnail, self.context.get('request'))
 
+    def get_video_file(self, obj):
+        """Get full URL for video file if it exists"""
+        if obj.video_file:
+            request = self.context.get('request')
+            if request:
+                return request.build_absolute_uri(obj.video_file.url)
+            return obj.video_file.url
+        return None
+
 
 class VideoPlaylistListSerializer(serializers.ModelSerializer):
     thumbnail = serializers.SerializerMethodField()