advanced filtering for hiding disabled channels and viewing only empty channels

(cherry picked from commit ea38c0b4b8)
Closes #182

apps/channels/api_views.py

@@ -8,6 +8,7 @@ from drf_yasg.utils import swagger_auto_schema
 from drf_yasg import openapi
 from django.shortcuts import get_object_or_404, get_list_or_404
 from django.db import transaction
+from django.db.models import Q
 import os, json, requests, logging
 from urllib.parse import unquote
 from apps.accounts.permissions import (
@@ -420,10 +421,36 @@ class ChannelViewSet(viewsets.ModelViewSet):
             group_names = channel_group.split(",")
             qs = qs.filter(channel_group__name__in=group_names)
 
-        if self.request.user.user_level < 10:
-            qs = qs.filter(user_level__lte=self.request.user.user_level)
+        filters = {}
+        q_filters = Q()
 
-        return qs
+        channel_profile_id = self.request.query_params.get("channel_profile_id")
+        show_disabled_param = self.request.query_params.get("show_disabled", None)
+        only_streamless = self.request.query_params.get("only_streamless", None)
+
+        if channel_profile_id:
+            try:
+                profile_id_int = int(channel_profile_id)
+                filters["channelprofilemembership__channel_profile_id"] = profile_id_int
+
+                if show_disabled_param is None:
+                    filters["channelprofilemembership__enabled"] = True
+            except (ValueError, TypeError):
+                # Ignore invalid profile id values
+                pass
+
+        if only_streamless:
+            q_filters &= Q(streams__isnull=True)
+
+        if self.request.user.user_level < 10:
+            filters["user_level__lte"] = self.request.user.user_level
+
+        if filters:
+            qs = qs.filter(**filters)
+        if q_filters:
+            qs = qs.filter(q_filters)
+
+        return qs.distinct()
 
     def get_serializer_context(self):
         context = super().get_serializer_context()