First commit of claude's rework in django + vanillajs fronted

apps/social/serializers.py

@@ -0,0 +1,105 @@
+from django.contrib.auth import get_user_model
+from rest_framework import serializers
+
+from .models import BlogPost, Bug, Friendship, Message
+
+User = get_user_model()
+
+
+def _user_mini(user):
+    if user is None:
+        return None
+    name = (f'{user.first_name} {user.last_name}'.strip()) or user.username
+    return {'id': user.id, 'username': user.username, 'display_name': name}
+
+
+# ── Message ───────────────────────────────────────────────────────────────────
+
+class MessageListSerializer(serializers.ModelSerializer):
+    sender_detail    = serializers.SerializerMethodField()
+    recipient_detail = serializers.SerializerMethodField()
+
+    def get_sender_detail(self, obj):    return _user_mini(obj.sender)
+    def get_recipient_detail(self, obj): return _user_mini(obj.recipient)
+
+    class Meta:
+        model  = Message
+        fields = ['id', 'sender_detail', 'recipient_detail', 'subject', 'sent_at', 'read_at']
+
+
+class MessageDetailSerializer(serializers.ModelSerializer):
+    sender_detail    = serializers.SerializerMethodField()
+    recipient_detail = serializers.SerializerMethodField()
+
+    def get_sender_detail(self, obj):    return _user_mini(obj.sender)
+    def get_recipient_detail(self, obj): return _user_mini(obj.recipient)
+
+    class Meta:
+        model  = Message
+        fields = ['id', 'sender_detail', 'recipient_detail', 'subject', 'body', 'sent_at', 'read_at']
+
+
+class MessageCreateSerializer(serializers.ModelSerializer):
+    recipient = serializers.PrimaryKeyRelatedField(queryset=User.objects.all())
+
+    class Meta:
+        model  = Message
+        fields = ['recipient', 'subject', 'body']
+
+    def validate_recipient(self, value):
+        if value == self.context['request'].user:
+            raise serializers.ValidationError('You cannot send a message to yourself.')
+        return value
+
+
+# ── BlogPost ──────────────────────────────────────────────────────────────────
+
+class BlogPostSerializer(serializers.ModelSerializer):
+    author_detail = serializers.SerializerMethodField()
+
+    def get_author_detail(self, obj): return _user_mini(obj.author)
+
+    class Meta:
+        model  = BlogPost
+        fields = ['id', 'author_detail', 'title', 'body', 'is_public', 'created_at', 'updated_at']
+        read_only_fields = ['created_at', 'updated_at']
+
+
+# ── Bug ───────────────────────────────────────────────────────────────────────
+
+class BugSerializer(serializers.ModelSerializer):
+    reporter_detail = serializers.SerializerMethodField()
+
+    def get_reporter_detail(self, obj): return _user_mini(obj.reporter)
+
+    class Meta:
+        model  = Bug
+        fields = [
+            'id', 'reporter_detail', 'title', 'description',
+            'severity', 'status', 'created_at', 'updated_at', 'resolved_at',
+        ]
+        read_only_fields = ['status', 'resolved_at', 'created_at', 'updated_at']
+
+
+# ── Friendship ────────────────────────────────────────────────────────────────
+
+class FriendshipSerializer(serializers.ModelSerializer):
+    from_user_detail = serializers.SerializerMethodField()
+    to_user_detail   = serializers.SerializerMethodField()
+
+    def get_from_user_detail(self, obj): return _user_mini(obj.from_user)
+    def get_to_user_detail(self, obj):   return _user_mini(obj.to_user)
+
+    class Meta:
+        model  = Friendship
+        fields = ['id', 'from_user_detail', 'to_user_detail', 'status', 'created_at']
+        read_only_fields = ['status', 'created_at']
+
+
+class FriendRequestSerializer(serializers.Serializer):
+    to_user = serializers.PrimaryKeyRelatedField(queryset=User.objects.all())
+
+    def validate_to_user(self, value):
+        if value == self.context['request'].user:
+            raise serializers.ValidationError('You cannot send a friend request to yourself.')
+        return value