Add auto-created tracking to Channel model and related serializers

- Introduced `auto_created` and `auto_created_by` fields in the Channel model to track channels created via M3U auto channel sync.
- Updated ChannelSerializer to include these new fields and added a method to retrieve the name of the M3U account that created the channel.
- Modified sync_auto_channels task to set these fields when creating channels and to filter existing channels accordingly.

apps/channels/migrations/0023_channel_auto_created_channel_auto_created_by.py

@@ -0,0 +1,25 @@
+# Generated by Django 5.1.6 on 2025-01-XX XX:XX
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dispatcharr_channels', '0022_channelgroupm3uaccount_auto_channel_sync_and_more'),
+        ('m3u', '0003_create_custom_account'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='channel',
+            name='auto_created',
+            field=models.BooleanField(default=False, help_text='Whether this channel was automatically created via M3U auto channel sync'),
+        ),
+        migrations.AddField(
+            model_name='channel',
+            name='auto_created_by',
+            field=models.ForeignKey(blank=True, help_text='The M3U account that auto-created this channel', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='auto_created_channels', to='m3u.m3uaccount'),
+        ),
+    ]

apps/channels/models.py

@@ -277,6 +277,19 @@ class Channel(models.Model):
 
     user_level = models.IntegerField(default=0)
 
+    auto_created = models.BooleanField(
+        default=False,
+        help_text="Whether this channel was automatically created via M3U auto channel sync"
+    )
+    auto_created_by = models.ForeignKey(
+        "m3u.M3UAccount",
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="auto_created_channels",
+        help_text="The M3U account that auto-created this channel"
+    )
+
     def clean(self):
         # Enforce unique channel_number within a given group
         existing = Channel.objects.filter(

apps/channels/serializers.py

@@ -173,6 +173,8 @@ class ChannelSerializer(serializers.ModelSerializer):
         required=False,
     )
 
+    auto_created_by_name = serializers.SerializerMethodField()
+
     class Meta:
         model = Channel
         fields = [
@@ -188,6 +190,9 @@ class ChannelSerializer(serializers.ModelSerializer):
             "uuid",
             "logo_id",
             "user_level",
+            "auto_created",
+            "auto_created_by",
+            "auto_created_by_name",
         ]
 
     def to_representation(self, instance):
@@ -286,6 +291,12 @@ class ChannelSerializer(serializers.ModelSerializer):
             return None
         return value  # PrimaryKeyRelatedField will handle the conversion to object
 
+    def get_auto_created_by_name(self, obj):
+        """Get the name of the M3U account that auto-created this channel."""
+        if obj.auto_created_by:
+            return obj.auto_created_by.name
+        return None
+
 
 class ChannelGroupM3UAccountSerializer(serializers.ModelSerializer):
     enabled = serializers.BooleanField()

apps/m3u/tasks.py

@@ -874,10 +874,11 @@ def sync_auto_channels(account_id):
                 channel_group=channel_group
             )
 
-            # Get existing channels in this group that were auto-created (we'll track this via a custom property)
+            # Get existing auto-created channels in this group that were created by this M3U account
             existing_auto_channels = Channel.objects.filter(
                 channel_group=channel_group,
-                streams__m3u_account=account
+                auto_created=True,
+                auto_created_by=account
             ).distinct()
 
             # Create a mapping of stream hashes to existing channels
@@ -909,14 +910,16 @@ def sync_auto_channels(account_id):
                     # Get tvc_guide_stationid from custom properties if it exists
                     tvc_guide_stationid = stream_custom_props.get("tvc-guide-stationid")
 
-                    # Create the channel
+                    # Create the channel with auto-created tracking
                     channel = Channel.objects.create(
                         channel_number=current_channel_number,
                         name=stream.name,
                         tvg_id=stream.tvg_id,
                         tvc_guide_stationid=tvc_guide_stationid,
                         channel_group=channel_group,
-                        user_level=0  # Default user level
+                        user_level=0,  # Default user level
+                        auto_created=True,  # Mark as auto-created
+                        auto_created_by=account  # Track which M3U account created it
                     )
 
                     # Associate the stream with the channel
@@ -954,20 +957,17 @@ def sync_auto_channels(account_id):
                     continue
 
             # Delete channels that no longer have corresponding streams
+            # Only delete auto-created channels that were created by this M3U account
             channels_to_delete = existing_auto_channels.exclude(id__in=channels_to_keep)
 
             for channel in channels_to_delete:
-                # Only delete if all streams for this channel are from this M3U account
-                # and this channel group
-                all_streams_from_account = all(
-                    s.m3u_account_id == account.id and s.channel_group_id == channel_group.id
-                    for s in channel.streams.all()
-                )
-
-                if all_streams_from_account:
-                    logger.debug(f"Deleting auto channel: {channel.channel_number} - {channel.name}")
+                # Double-check that this is an auto-created channel by this account
+                if channel.auto_created and channel.auto_created_by_id == account.id:
+                    logger.debug(f"Deleting auto-created channel: {channel.channel_number} - {channel.name}")
                     channel.delete()
                     channels_deleted += 1
+                else:
+                    logger.warning(f"Skipping deletion of non-auto-created channel: {channel.channel_number} - {channel.name}")
 
         logger.info(f"Auto channel sync complete for account {account.name}: {channels_created} created, {channels_deleted} deleted")
         return f"Auto sync: {channels_created} channels created, {channels_deleted} deleted"