chat implemented, testing needed

backend/social/chat/consumers.py

@@ -3,8 +3,9 @@ import json
 
 from channels.db import database_sync_to_async
 from channels.generic.websocket import AsyncWebsocketConsumer
+from django.utils import timezone
 
-from .models import Chat, Message
+from .models import Chat, ChatReadStatus, Message
 
 
 class ChatConsumer(AsyncWebsocketConsumer):
@@ -95,6 +96,14 @@ class ChatConsumer(AsyncWebsocketConsumer):
                 "user": user.username,
             })
 
+        elif msg_type == "mark_read":
+            await _mark_read(chat_id=self.chat_id, user=user)
+            await self.channel_layer.group_send(self.chat_name, {
+                "type": "read.status",
+                "user": user.username,
+                "chat_id": int(self.chat_id),
+            })
+
         else:
             await self.send(text_data=json.dumps({"error": "Unsupported message type."}))
 
@@ -155,6 +164,13 @@ class ChatConsumer(AsyncWebsocketConsumer):
             "user": event["user"],
         }))
 
+    async def read_status(self, event):
+        await self.send(text_data=json.dumps({
+            "type": "read_status",
+            "user": event["user"],
+            "chat_id": event["chat_id"],
+        }))
+
 
 # ---------------------------------------------------------------------------
 # DB helpers (run in thread pool via database_sync_to_async)
@@ -179,3 +195,12 @@ def _create_message(chat_id, sender, content, reply_to_id=None):
 def _toggle_reaction(message_id, user, emoji):
     message = Message.objects.get(pk=message_id)
     return message.toggle_reaction(user, emoji)
+
+
+@database_sync_to_async
+def _mark_read(chat_id, user):
+    ChatReadStatus.objects.update_or_create(
+        user=user,
+        chat_id=chat_id,
+        defaults={"last_read_at": timezone.now()},
+    )