[EPIC] Audio metadata update - UI / API

api/funkwhale_api/common/decorators.py

@@ -1,5 +1,17 @@
-from rest_framework import response
+from django.db import transaction
+
 from rest_framework import decorators
+from rest_framework import exceptions
+from rest_framework import response
+from rest_framework import status
+
+from . import filters
+from . import models
+from . import mutations as common_mutations
+from . import serializers
+from . import signals
+from . import tasks
+from . import utils
 
 
 def action_route(serializer_class):
@@ -12,3 +24,67 @@ def action_route(serializer_class):
         return response.Response(result, status=200)
 
     return action
+
+
+def mutations_route(types):
+    """
+    Given a queryset and a list of mutation types, return a view
+    that can be included in any viewset, and serve:
+
+    GET /{id}/mutations/ - list of mutations for the given object
+    POST /{id}/mutations/ - create a mutation for the given object
+    """
+
+    @transaction.atomic
+    def mutations(self, request, *args, **kwargs):
+        obj = self.get_object()
+        if request.method == "GET":
+            queryset = models.Mutation.objects.get_for_target(obj).filter(
+                type__in=types
+            )
+            queryset = queryset.order_by("-creation_date")
+            filterset = filters.MutationFilter(request.GET, queryset=queryset)
+            page = self.paginate_queryset(filterset.qs)
+            if page is not None:
+                serializer = serializers.APIMutationSerializer(page, many=True)
+                return self.get_paginated_response(serializer.data)
+
+            serializer = serializers.APIMutationSerializer(queryset, many=True)
+            return response.Response(serializer.data)
+        if request.method == "POST":
+            if not request.user.is_authenticated:
+                raise exceptions.NotAuthenticated()
+            serializer = serializers.APIMutationSerializer(
+                data=request.data, context={"registry": common_mutations.registry}
+            )
+            serializer.is_valid(raise_exception=True)
+            if not common_mutations.registry.has_perm(
+                actor=request.user.actor,
+                type=serializer.validated_data["type"],
+                obj=obj,
+                perm="approve"
+                if serializer.validated_data.get("is_approved", False)
+                else "suggest",
+            ):
+                raise exceptions.PermissionDenied()
+
+            final_payload = common_mutations.registry.get_validated_payload(
+                type=serializer.validated_data["type"],
+                payload=serializer.validated_data["payload"],
+                obj=obj,
+            )
+            mutation = serializer.save(
+                created_by=request.user.actor,
+                target=obj,
+                payload=final_payload,
+                is_approved=serializer.validated_data.get("is_approved", None),
+            )
+            if mutation.is_approved:
+                utils.on_commit(tasks.apply_mutation.delay, mutation_id=mutation.pk)
+
+            utils.on_commit(
+                signals.mutation_created.send, sender=None, mutation=mutation
+            )
+            return response.Response(serializer.data, status=status.HTTP_201_CREATED)
+
+    return decorators.action(methods=["get", "post"], detail=True)(mutations)