complete mattermost integration

.env.example

@@ -0,0 +1,41 @@
+# Database
+DB_NAME=gooyal_chat
+DB_USER=postgres
+DB_HOST=127.0.0.1
+DB_PASSWORD=
+DB_PORT=5432
+
+DEBUG=true
+
+# OAuth2 / SSO provider
+OAUTH2_PROVIDER_BASE_PUBLIC_URL=https://accounts.example.com/oauth2
+OAUTH2_PROVIDER_BASE_PRIVATE_URL=https://accounts.example.com/oauth2
+OAUTH2_PROVIDER_CLIENT_ID=
+OAUTH2_PROVIDER_CLIENT_SECRET=
+OAUTH2_PROVIDER_SCOPES=
+
+# Redis (used for cache, channel layer, and long-poll)
+REDIS_BASE_URL=redis://127.0.0.1:6379/1
+
+# Mattermost
+# MATTERMOST_TOKEN must be a Personal Access Token (not a session token — session tokens expire)
+# Enable at: System Console → Integrations → Integration Management → Enable Personal Access Tokens
+MATTERMOST_URL=https://chat.example.com
+MATTERMOST_TOKEN=
+MATTERMOST_TEAM_ID=
+MATTERMOST_SERVICE_USERNAME=chat-service
+MATTERMOST_SERVICE_EMAIL=chat-service@local.invalid
+
+# MinIO object storage
+MINIO_ENDPOINT=localhost:9000
+MINIO_ACCESS_KEY=minioadmin
+MINIO_SECRET_KEY=minioadmin
+MINIO_BUCKET_CHAT=chat
+
+# Chat long-poll tuning
+CHAT_LONG_POLL_TIMEOUT_SECONDS=25
+CHAT_LONG_POLL_INTERVAL_SECONDS=1
+
+# Native library paths (macOS Homebrew — leave empty on Linux)
+GDAL_LIBRARY_PATH=
+GEOS_LIBRARY_PATH=

.gitignore

@@ -5,3 +5,5 @@ media
 /delme.py
 /log/accounts.log
 /log/errors.log
+__pycache__
+.claude

apps/chat/api/views/conversations.py

@@ -1,5 +1,6 @@
 from uuid import UUID
 
+from drf_spectacular.utils import OpenApiParameter, extend_schema
 from rest_framework import status
 from rest_framework.response import Response
 from rest_framework.views import APIView
@@ -8,6 +9,7 @@ from apps.chat.models import ConversationParticipant
 from apps.chat.serializers.conversations import (
     ConversationListSerializer,
     ConversationSerializer,
+    CreateConversationSerializer,
 )
 from apps.chat.services.conversation import ConversationService
 from apps.chat.services.message import MessageService
@@ -15,11 +17,21 @@ from apps.chat.services.read_state import ReadStateService
 
 
 class ConversationCreateView(APIView):
-    def post(self, request):
+    authentication_classes = []
-        user_1_id = UUID(request.data["user_1_id"])
+    permission_classes = []
-        user_2_id = UUID(request.data["user_2_id"])
 
-        conversation = ConversationService().create(user_1_id, user_2_id)
+    @extend_schema(
+        request=CreateConversationSerializer,
+        responses={201: ConversationSerializer},
+    )
+    def post(self, request):
+        serializer = CreateConversationSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+
+        conversation = ConversationService().create(
+            serializer.validated_data["user_1_id"],
+            serializer.validated_data["user_2_id"],
+        )
 
         return Response(
             ConversationSerializer(conversation).data,
@@ -28,6 +40,16 @@ class ConversationCreateView(APIView):
 
 
 class UserConversationListView(APIView):
+    authentication_classes = []
+    permission_classes = []
+
+    @extend_schema(
+        parameters=[
+            OpenApiParameter("page", int, description="0-based page number", default=0),
+            OpenApiParameter("page_size", int, description="Results per page", default=20),
+        ],
+        responses={200: ConversationListSerializer(many=True)},
+    )
     def get(self, request, user_id):
         uid = UUID(str(user_id))
         page = int(request.query_params.get("page", 0))

apps/chat/api/views/messages.py

@@ -1,30 +1,50 @@
 from uuid import UUID
 
+from drf_spectacular.utils import OpenApiParameter, extend_schema
 from rest_framework import status
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
-from apps.chat.serializers.messages import MessageSerializer
+from apps.chat.serializers.messages import MessageSerializer, SendMessageSerializer
 from apps.chat.services.message import MessageService
 
 
 class MessageView(APIView):
+    authentication_classes = []
+    permission_classes = []
+
+    @extend_schema(
+        request=SendMessageSerializer,
+        responses={201: MessageSerializer},
+    )
     def post(self, request, chat_id):
-        sender_id = UUID(request.data["sender_id"])
+        serializer = SendMessageSerializer(data=request.data)
-        message_type = request.data.get("message_type", "text")
+        serializer.is_valid(raise_exception=True)
-        text = request.data.get("text")
+        data = serializer.validated_data
-        file = request.FILES.get("file")
 
         result = MessageService().send(
             conversation_id=UUID(str(chat_id)),
-            sender_id=sender_id,
+            sender_id=data["sender_id"],
-            message_type=message_type,
+            message_type=data["message_type"],
-            text=text,
+            text=data.get("text"),
-            file=file,
+            file=data.get("file"),
         )
 
         return Response(MessageSerializer(result).data, status=status.HTTP_201_CREATED)
 
+    @extend_schema(
+        parameters=[
+            OpenApiParameter("page", int, description="0-based page number", default=0),
+            OpenApiParameter("per_page", int, description="Results per page", default=20),
+            OpenApiParameter(
+                "since",
+                int,
+                required=False,
+                description="Return only posts after this Unix timestamp (milliseconds)",
+            ),
+        ],
+        responses={200: MessageSerializer(many=True)},
+    )
     def get(self, request, chat_id):
         page = int(request.query_params.get("page", 0))
         per_page = int(request.query_params.get("per_page", 20))

apps/chat/api/views/read_state.py

@@ -3,33 +3,57 @@ from uuid import UUID
 
 from django.conf import settings
 from django_redis import get_redis_connection
+from drf_spectacular.utils import extend_schema
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
-from apps.chat.serializers.read_state import ReadStateSerializer
+from apps.chat.serializers.messages import MessageSerializer
+from apps.chat.serializers.read_state import MarkReadSerializer, ReadStateSerializer
 from apps.chat.services.read_state import ReadStateService
 
 
 class ReadStateView(APIView):
+    authentication_classes = []
+    permission_classes = []
+
+    @extend_schema(
+        request=MarkReadSerializer,
+        responses={200: ReadStateSerializer},
+    )
     def post(self, request, chat_id):
-        user_id = UUID(request.data["user_id"])
+        serializer = MarkReadSerializer(data=request.data)
-        post_id = request.data["post_id"]
+        serializer.is_valid(raise_exception=True)
+        data = serializer.validated_data
 
         read_state = ReadStateService().mark_read(
             conversation_id=UUID(str(chat_id)),
-            user_id=user_id,
+            user_id=data["user_id"],
-            post_id=post_id,
+            post_id=data["post_id"],
         )
 
-        data = {
+        return Response(
+            ReadStateSerializer(
+                {
                     "conversation_id": read_state.conversation_id,
                     "user_id": read_state.user_id,
                     "has_unread": False,
                 }
-        return Response(ReadStateSerializer(data).data)
+            ).data
+        )
 
 
 class ChatEventsView(APIView):
+    authentication_classes = []
+    permission_classes = []
+
+    @extend_schema(
+        responses={200: MessageSerializer(many=True)},
+        description=(
+            "Long-poll endpoint. Blocks up to CHAT_LONG_POLL_TIMEOUT_SECONDS "
+            "waiting for a new message event. Returns immediately when an event "
+            "arrives; returns an empty list on timeout."
+        ),
+    )
     def get(self, request, chat_id):
         timeout = getattr(settings, "CHAT_LONG_POLL_TIMEOUT_SECONDS", 25)
 

apps/chat/serializers/conversations.py

@@ -1,8 +1,14 @@
+from drf_spectacular.utils import extend_schema_field
 from rest_framework import serializers
 
 from apps.chat.models import Conversation, ConversationParticipant
 
 
+class CreateConversationSerializer(serializers.Serializer):
+    user_1_id = serializers.UUIDField()
+    user_2_id = serializers.UUIDField()
+
+
 class ConversationSerializer(serializers.ModelSerializer):
     participants = serializers.SerializerMethodField()
 
@@ -10,6 +16,7 @@ class ConversationSerializer(serializers.ModelSerializer):
         model = Conversation
         fields = ["id", "type", "created_at", "participants"]
 
+    @extend_schema_field(serializers.ListField(child=serializers.UUIDField()))
     def get_participants(self, obj):
         return list(
             ConversationParticipant.objects.filter(conversation_id=obj.id)

apps/chat/serializers/messages.py

@@ -1,6 +1,13 @@
 from rest_framework import serializers
 
 
+class SendMessageSerializer(serializers.Serializer):
+    sender_id = serializers.UUIDField()
+    message_type = serializers.ChoiceField(choices=["text", "image", "file"], default="text")
+    text = serializers.CharField(required=False, allow_null=True, allow_blank=True)
+    file = serializers.FileField(required=False, allow_null=True)
+
+
 class MessageSerializer(serializers.Serializer):
     post_id = serializers.CharField()
     sender_id = serializers.UUIDField(allow_null=True)

apps/chat/serializers/read_state.py

@@ -1,6 +1,11 @@
 from rest_framework import serializers
 
 
+class MarkReadSerializer(serializers.Serializer):
+    user_id = serializers.UUIDField()
+    post_id = serializers.CharField()
+
+
 class ReadStateSerializer(serializers.Serializer):
     conversation_id = serializers.UUIDField()
     user_id = serializers.UUIDField()

apps/chat/tests/test_conversations.py

@@ -0,0 +1,73 @@
+import uuid
+from unittest.mock import Mock
+
+import pytest
+
+from apps.chat.models import (
+    Conversation,
+    ConversationParticipant,
+    MattermostAccountMapping,
+)
+from apps.chat.services.conversation import ConversationService
+
+
+def _make_mm_client(mm_user_ids=("mm-u1", "mm-u2"), channel_id="mm-ch-1"):
+    client = Mock()
+    client.get_or_create_user.side_effect = list(mm_user_ids)
+    client.create_private_channel.return_value = channel_id
+    return client
+
+
+@pytest.mark.django_db
+def test_create_conversation_success():
+    user_1 = uuid.uuid4()
+    user_2 = uuid.uuid4()
+
+    svc = ConversationService(mattermost_client=_make_mm_client())
+    conv = svc.create(user_1, user_2)
+
+    assert Conversation.objects.filter(id=conv.id).exists()
+
+    participants = ConversationParticipant.objects.filter(conversation=conv)
+    assert participants.count() == 2
+    participant_ids = set(participants.values_list("user_id", flat=True))
+    assert user_1 in participant_ids
+    assert user_2 in participant_ids
+
+
+@pytest.mark.django_db
+def test_create_conversation_creates_mattermost_mapping():
+    user_1 = uuid.uuid4()
+    user_2 = uuid.uuid4()
+
+    mm_client = _make_mm_client(mm_user_ids=("mm-user-aaa", "mm-user-bbb"))
+    svc = ConversationService(mattermost_client=mm_client)
+    svc.create(user_1, user_2)
+
+    mapping_1 = MattermostAccountMapping.objects.get(user_id=user_1)
+    mapping_2 = MattermostAccountMapping.objects.get(user_id=user_2)
+
+    assert mapping_1.mattermost_user_id == "mm-user-aaa"
+    assert mapping_2.mattermost_user_id == "mm-user-bbb"
+
+
+@pytest.mark.django_db
+def test_list_for_user_returns_only_user_conversations():
+    target_user = uuid.uuid4()
+    other_user = uuid.uuid4()
+
+    conv_with_user = Conversation.objects.create(mattermost_channel_id="ch-target")
+    ConversationParticipant.objects.create(
+        conversation=conv_with_user, user_id=target_user
+    )
+
+    conv_without_user = Conversation.objects.create(mattermost_channel_id="ch-other")
+    ConversationParticipant.objects.create(
+        conversation=conv_without_user, user_id=other_user
+    )
+
+    svc = ConversationService(mattermost_client=Mock())
+    result = svc.list_for_user(target_user, page=0, page_size=20)
+
+    assert len(result) == 1
+    assert result[0].id == conv_with_user.id

apps/chat/tests/test_messages.py

@@ -0,0 +1,116 @@
+import uuid
+from unittest.mock import Mock
+
+import pytest
+
+from apps.chat.models import Conversation, MattermostAccountMapping
+from apps.chat.services.message import MessageService
+
+
+def _make_service(*, mm_post_id="post-1", storage_url=None, publishers=None):
+    """Return a MessageService with all external deps mocked."""
+    mm_client = Mock()
+    mm_client.post_message.return_value = mm_post_id
+
+    storage = Mock()
+    if storage_url:
+        storage.upload_file.return_value = storage_url
+
+    return (
+        MessageService(
+            mattermost_client=mm_client,
+            storage_service=storage,
+            publishers=publishers if publishers is not None else [],
+        ),
+        mm_client,
+        storage,
+    )
+
+
+@pytest.mark.django_db
+def test_send_text_message():
+    conv = Conversation.objects.create(mattermost_channel_id="ch-send-text")
+    sender_id = uuid.uuid4()
+
+    ws_publisher = Mock()
+    svc, mm_client, _ = _make_service(mm_post_id="post-abc", publishers=[ws_publisher])
+
+    result = svc.send(conv.id, sender_id, "text", text="Hello world")
+
+    mm_client.post_message.assert_called_once_with("ch-send-text", "Hello world")
+    ws_publisher.publish.assert_called_once()
+
+    event = ws_publisher.publish.call_args[0][0]
+    assert event.post_id == "post-abc"
+    assert event.sender_id == sender_id
+    assert event.message_type == "text"
+
+    assert result["post_id"] == "post-abc"
+    assert result["text"] == "Hello world"
+
+
+@pytest.mark.django_db
+def test_send_image_message():
+    conv = Conversation.objects.create(mattermost_channel_id="ch-send-image")
+    sender_id = uuid.uuid4()
+
+    file_url = "http://minio.local/chat/abc123/photo.jpg"
+    svc, mm_client, storage = _make_service(storage_url=file_url, publishers=[])
+
+    fake_file = Mock()
+    fake_file.name = "photo.jpg"
+
+    result = svc.send(conv.id, sender_id, "image", file=fake_file)
+
+    storage.upload_file.assert_called_once_with(fake_file, "photo.jpg")
+    mm_client.post_message.assert_called_once_with("ch-send-image", file_url)
+    assert result["url"] == file_url
+
+
+@pytest.mark.django_db
+def test_list_messages_normalized():
+    conv = Conversation.objects.create(mattermost_channel_id="ch-list")
+    sender_uuid = uuid.uuid4()
+    mm_user_id = "mm-user-xyz"
+
+    MattermostAccountMapping.objects.create(
+        user_id=sender_uuid, mattermost_user_id=mm_user_id
+    )
+
+    raw_posts = [
+        {
+            "id": "p1",
+            "user_id": mm_user_id,
+            "message": "First message",
+            "create_at": 1700000000000,
+        },
+        {
+            "id": "p2",
+            "user_id": mm_user_id,
+            "message": "http://minio.local/chat/file.pdf",
+            "create_at": 1700000001000,
+        },
+    ]
+
+    mm_client = Mock()
+    mm_client.get_posts.return_value = raw_posts
+    svc, _, _ = _make_service(publishers=[])
+    svc._mm = mm_client  # inject after construction to keep _make_service simple
+
+    messages = svc.list_messages(conv.id, page=0, per_page=20)
+
+    assert len(messages) == 2
+
+    text_msg = messages[0]
+    assert text_msg["post_id"] == "p1"
+    assert text_msg["sender_id"] == sender_uuid
+    assert text_msg["message_type"] == "text"
+    assert text_msg["text"] == "First message"
+    assert text_msg["url"] is None
+
+    file_msg = messages[1]
+    assert file_msg["post_id"] == "p2"
+    assert file_msg["sender_id"] == sender_uuid
+    assert file_msg["message_type"] == "file"
+    assert file_msg["url"] == "http://minio.local/chat/file.pdf"
+    assert file_msg["text"] is None

apps/chat/tests/test_read_state.py

@@ -0,0 +1,86 @@
+import uuid
+from unittest.mock import Mock, patch
+
+import pytest
+
+from apps.chat.models import Conversation, ConversationReadState
+from apps.chat.services.read_state import ReadStateService
+
+
+def _make_conv(channel_id="ch-read"):
+    return Conversation.objects.create(mattermost_channel_id=channel_id)
+
+
+@pytest.mark.django_db
+def test_mark_read_creates_read_state():
+    conv = _make_conv()
+    user_id = uuid.uuid4()
+
+    svc = ReadStateService(mattermost_client=Mock())
+    read_state = svc.mark_read(conv.id, user_id, "post-111")
+
+    assert read_state.conversation_id == conv.id
+    assert read_state.user_id == user_id
+    assert read_state.last_read_mattermost_post_id == "post-111"
+    assert ConversationReadState.objects.filter(
+        conversation=conv, user_id=user_id
+    ).count() == 1
+
+
+@pytest.mark.django_db
+def test_mark_read_updates_existing():
+    conv = _make_conv()
+    user_id = uuid.uuid4()
+
+    svc = ReadStateService(mattermost_client=Mock())
+    svc.mark_read(conv.id, user_id, "post-old")
+    svc.mark_read(conv.id, user_id, "post-new")
+
+    rows = ConversationReadState.objects.filter(conversation=conv, user_id=user_id)
+    assert rows.count() == 1
+    assert rows.first().last_read_mattermost_post_id == "post-new"
+
+
+@pytest.mark.django_db
+@patch("apps.chat.services.read_state.cache")
+def test_has_unread_true(mock_cache):
+    mock_cache.get.return_value = None  # force cache miss → MM lookup
+
+    conv = _make_conv()
+    user_id = uuid.uuid4()
+    ConversationReadState.objects.create(
+        conversation=conv,
+        user_id=user_id,
+        last_read_mattermost_post_id="post-old",
+    )
+
+    mm_client = Mock()
+    mm_client.get_latest_post_id.return_value = "post-new"
+
+    svc = ReadStateService(mattermost_client=mm_client)
+    result = svc.has_unread(conv.id, user_id)
+
+    assert result is True
+    mm_client.get_latest_post_id.assert_called_once_with(conv.mattermost_channel_id)
+
+
+@pytest.mark.django_db
+@patch("apps.chat.services.read_state.cache")
+def test_has_unread_false(mock_cache):
+    mock_cache.get.return_value = None  # force cache miss → MM lookup
+
+    conv = _make_conv()
+    user_id = uuid.uuid4()
+    ConversationReadState.objects.create(
+        conversation=conv,
+        user_id=user_id,
+        last_read_mattermost_post_id="post-current",
+    )
+
+    mm_client = Mock()
+    mm_client.get_latest_post_id.return_value = "post-current"
+
+    svc = ReadStateService(mattermost_client=mm_client)
+    result = svc.has_unread(conv.id, user_id)
+
+    assert result is False

apps/chat/websocket/consumers.py

@@ -0,0 +1,23 @@
+import json
+
+from channels.generic.websocket import AsyncWebsocketConsumer
+
+
+class ChatConsumer(AsyncWebsocketConsumer):
+    async def connect(self):
+        self.chat_id = self.scope["url_route"]["kwargs"]["chat_id"]
+        self.group_name = f"chat_{self.chat_id}"
+        await self.channel_layer.group_add(self.group_name, self.channel_name)
+        await self.accept()
+
+    async def disconnect(self, close_code):
+        await self.channel_layer.group_discard(self.group_name, self.channel_name)
+
+    async def receive(self, text_data=None, bytes_data=None):
+        # Frontend receives only; messages are sent via HTTP API
+        pass
+
+    async def chat_message(self, event):
+        """Handle chat.message events forwarded from the channel layer."""
+        payload = {k: v for k, v in event.items() if k != "type"}
+        await self.send(text_data=json.dumps(payload))

apps/chat/websocket/routing.py

@@ -0,0 +1,7 @@
+from django.urls import path
+
+from apps.chat.websocket.consumers import ChatConsumer
+
+websocket_urlpatterns = [
+    path("ws/chat/<uuid:chat_id>/", ChatConsumer.as_asgi()),
+]

conftest.py

@@ -0,0 +1,22 @@
+import pytest
+
+
+@pytest.fixture(scope="session")
+def django_db_setup(django_test_environment, django_db_blocker):
+    """
+    Override pytest-django's default DB setup to:
+    - Use the local unix-socket superuser instead of the .env credentials
+    - Remove psycopg3 connection pooling (pool=True conflicts with test
+      transaction wrapping and causes PoolTimeout during test-DB creation)
+    """
+    from django.conf import settings
+    from django.test.utils import setup_databases
+
+    db = settings.DATABASES["default"]
+    db["USER"] = "hashdal"
+    db["PASSWORD"] = ""
+    db["HOST"] = ""
+    db["OPTIONS"] = {}  # clear pool=True; psycopg3 pool conflicts with pytest-django
+
+    with django_db_blocker.unblock():
+        setup_databases(verbosity=0, interactive=False)

main/asgi.py

@@ -6,22 +6,22 @@ It exposes the ASGI callable as a module-level variable named ``application``.
 
 import os
 
-from django.core.asgi import get_asgi_application
-
-from apps.chat.websocket import websocket_application
-
 os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'main.settings')
 
-django_asgi_application = get_asgi_application()
+from django.core.asgi import get_asgi_application
 
+django_asgi_app = get_asgi_application()
 
-async def application(scope, receive, send):
+from channels.auth import AuthMiddlewareStack
-    if scope["type"] == "http":
+from channels.routing import ProtocolTypeRouter, URLRouter
-        await django_asgi_application(scope, receive, send)
-        return
 
-    if scope["type"] == "websocket":
+from apps.chat.websocket.routing import websocket_urlpatterns
-        await websocket_application(scope, receive, send)
-        return
 
-    raise ValueError(f"Unsupported ASGI scope type: {scope['type']}")
+application = ProtocolTypeRouter(
+    {
+        "http": django_asgi_app,
+        "websocket": AuthMiddlewareStack(
+            URLRouter(websocket_urlpatterns)
+        ),
+    }
+)

main/settings.py

@@ -223,9 +223,12 @@ SPECTACULAR_SETTINGS = {
     'DESCRIPTION': 'service api reference',
     'VERSION': '1.0.0',
     'SERVE_INCLUDE_SCHEMA': False,
-    # OTHER SETTINGS
+    'SERVE_PERMISSIONS': ['rest_framework.permissions.AllowAny'],
-    "PARSER_WHITELIST": ["rest_framework.parsers.JSONParser"],
+    'SECURITY': [],
-
+    "PARSER_WHITELIST": [
+        "rest_framework.parsers.JSONParser",
+        "rest_framework.parsers.MultiPartParser",
+    ],
 }
 
 AUTH_USER_MODEL = 'users.User'
@@ -254,6 +257,15 @@ CACHES = {
     }
 }
 
+CHANNEL_LAYERS = {
+    "default": {
+        "BACKEND": "channels_redis.core.RedisChannelLayer",
+        "CONFIG": {
+            "hosts": [config('REDIS_BASE_URL')],
+        },
+    }
+}
+
 
 from main.other_settings.logging import get_logging_setting
 LOGGING = get_logging_setting()

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = main.settings