enhancement(backend):trigger plugins download on third_party metadata fetch

api/funkwhale_api/federation/tasks.py

@@ -7,6 +7,7 @@ from urllib.parse import urlparse
 
 import requests
 from django.conf import settings
+from django.contrib.contenttypes.models import ContentType
 from django.core.cache import cache
 from django.db import transaction
 from django.db.models import F, Q
@@ -15,6 +16,7 @@ from django.utils import timezone
 from dynamic_preferences.registries import global_preferences_registry
 from requests.exceptions import RequestException
 
+from config import plugins
 from funkwhale_api import musicbrainz
 from funkwhale_api.audio import models as audio_models
 from funkwhale_api.common import models as common_models
@@ -461,6 +463,31 @@ def fetch(fetch_obj):
     )
 
 
+def trigger_third_party_upload_hook(fetch):
+    if fetch.status == "finished" and fetch.object:
+        if fetch.object_content_type == ContentType.objects.get_for_model(
+            music_models.Track
+        ):
+            if not music_models.Track.objects.filter(pk=fetch.object.pk).playable_by(
+                fetch.actor
+            ):
+                plugins.trigger_hook(
+                    plugins.TRIGGER_THIRD_PARTY_UPLOAD,
+                    track=fetch.object,
+                )
+        if fetch.object_content_type == ContentType.objects.get_for_model(
+            music_models.Album
+        ):
+            for track in fetch.object.tracks.all():
+                if not music_models.Track.objects.filter(
+                    pk=fetch.object.pk
+                ).playable_by(fetch.actor):
+                    plugins.trigger_hook(
+                        plugins.TRIGGER_THIRD_PARTY_UPLOAD,
+                        track=track,
+                    )
+
+
 def musicbrainz_type_handler(fetch):
     url = fetch.url
     path_parts = urlparse(url).path.strip("/").split("/")
@@ -590,10 +617,11 @@ def third_party_fetch(fetch_obj):
     fetch_obj.object = obj
     fetch_obj.status = "finished"
     fetch_obj.fetch_date = timezone.now()
-    # to do : trigger third party download ?
-    return fetch_obj.save(
+    trigger_third_party_upload_hook(fetch_obj)
+    fetch_obj.save(
         update_fields=["fetch_date", "status", "object_id", "object_content_type"]
     )
+    return fetch_obj
 
 
 class PreserveSomeDataCollector(Collector):

docs/specs/fetch-third-party/index.md

@@ -0,0 +1,17 @@
+# Collections
+
+## The issue
+
+Has a user I want to be able to get metadata from third party services (to add them to my favorites or to a playlist)
+
+## Solution
+
+paste the track or release url into the search bar. Funkwhale will get the mmetadata and create the objects in db. First implementation with Musicbrainz :
+
+- track : https://musicbrainz.org/release/{mbid}
+- release : https://musicbrainz.org/recording/{mbid}
+
+## Implementation
+
+third_party_fetch in federation.tasks
+musicbrainz.serializers