feat(notifications): notify membership access changes

apps/workspaces/api/serializers.py

@@ -1,8 +1,10 @@
-from rest_framework import serializers
-
-from core.serializers.base import BaseModelSerializer
-from apps.workspaces.models import Workspace, WorkspaceMembership
-from core.serializers.mini import UserMiniSerializer
+from rest_framework import serializers
+
+from apps.notifications.membership_events import notify_workspace_membership_added
+from apps.users.models import User
+from core.serializers.base import BaseModelSerializer
+from apps.workspaces.models import Workspace, WorkspaceMembership
+from core.serializers.mini import UserMiniSerializer
 
 
 class WorkspaceMemberInputSerializer(serializers.Serializer):
@@ -34,26 +36,41 @@ class WorkspaceSerializer(BaseModelSerializer):
         ).first()
         return getattr(membership, "role", None)
 
-    def create(self, validated_data):
-        members_data = validated_data.pop('members', [])
-        
-        workspace = super().create(validated_data)
-        
-        memberships_to_create = []
-        for member in members_data:
-            memberships_to_create.append(
+    def create(self, validated_data):
+        members_data = validated_data.pop('members', [])
+
+        workspace = super().create(validated_data)
+
+        memberships_to_create = []
+        for member in members_data:
+            memberships_to_create.append(
                 WorkspaceMembership(
                     workspace=workspace,
                     user_id=member['user_id'],
                     role=member['role'],
                     is_active=True
                 )
-            )
-        
-        if memberships_to_create:
-            WorkspaceMembership.objects.bulk_create(memberships_to_create)
-            
-        return workspace
+            )
+
+        if memberships_to_create:
+            WorkspaceMembership.objects.bulk_create(memberships_to_create)
+            request = self.context.get("request")
+            actor = getattr(request, "user", None)
+            if actor and actor.is_authenticated:
+                users_by_id = User.objects.in_bulk(
+                    [member["user_id"] for member in members_data]
+                )
+                for member in members_data:
+                    recipient = users_by_id.get(member["user_id"])
+                    if recipient:
+                        notify_workspace_membership_added(
+                            actor=actor,
+                            recipient=recipient,
+                            workspace=workspace,
+                            role=member["role"],
+                        )
+
+        return workspace
 
 
 class WorkspaceMembershipSerializer(BaseModelSerializer):