add video for dynamic playlist

apps/core/tasks.py

 import requests
 
 from django.conf import settings
+from django.contrib.contenttypes.models import ContentType
 
-from .models import Video, READY
+from .models import Video, Playlist, TagToObject, READY, DYNAMIC
 from .s3_uploader import upload_file
 from .utils import asset_upload, generate_thumbnail
 
 from cp_video.celery import app
 
 
+video_content_type = ContentType.objects.get_for_model(Video)
+playlist_content_type = ContentType.objects.get_for_model(Playlist)
+
+
 @app.task(soft_time_limit=60)
 def send_video_to_s3():
-    local_videos = Video.objects.filter(local_file__isnull=False)
+    local_videos = Video.objects.filter(
+        local_file__isnull=False
+    ).prefetch_related('tags', 'categories')
 
     for local_video in local_videos:
         video_name = local_video.local_file.name.split('/')[-1]
@@ -35,4 +42,24 @@ def send_video_to_s3():
 
         local_video.save(update_fields=['s3_file', 'status', 'thumbnail'])
 
+        tag_ids = list(TagToObject.objects.filter(
+            content_type=video_content_type,
+            object_id=local_video.id,
+        ).values_list('tag_id', flat=True))
+
+        if tag_ids:
+            playlist_ids = list(TagToObject.objects.filter(
+                content_type=playlist_content_type,
+                tag_id__in=tag_ids,
+            ).values_list('object_id', flat=True))
+
+            if playlist_ids:
+                playlists = Playlist.objects.filter(
+                    id__in=playlist_ids,
+                    type=DYNAMIC,
+                )
+
+                for playlist in playlists:
+                    playlist.videos.add(local_video)
+
     local_videos.update(local_file=None)