✨(backend) notify participants only if the room exists

Improves sendData reliability by preventing execution when the room
doesn’t exist.

This change addresses errors in staging and production where waiting
participants arrive before the room owner creates the room.

In remote environments, the LiveKit Python SDK doesn’t return a clean
Twirp error when the room is missing; instead of a proper "server unknown"
response, it raises a ContentTypeError, as if the LiveKit server weren’t
responding with a JSON payload, even though the code specifies otherwise.

While the issue cannot be reproduced locally,
this should help mitigate production errors.

Part of a broader effort to enhance data transmission reliability.

Importantly, a participant requesting entry to a room before the owner
arrives should not be considered an exception.

LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021-2023 DINUM/Etalab
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

docker/livekit/Dockerfile

@@ -1,4 +1,4 @@
-FROM livekit/livekit-server:latest
+FROM livekit/livekit-server:v1.8.0
 
 # We inject the nip.io certificate manually because the livekit chart doesn't support volume mounting
 COPY rootCA.pem /etc/ssl/certs/

src/backend/core/services/lobby.py

@@ -12,7 +12,12 @@ from django.conf import settings
 from django.core.cache import cache
 
 from asgiref.sync import async_to_sync
-from livekit.api import LiveKitAPI, SendDataRequest, TwirpError  # pylint: disable=E0611
+from livekit.api import (  # pylint: disable=E0611
+    ListRoomsRequest,
+    LiveKitAPI,
+    SendDataRequest,
+    TwirpError,
+)
 
 from core import models, utils
 
@@ -221,6 +226,12 @@ class LobbyService:
             color=color,
         )
 
+        try:
+            self.notify_participants(room_id=room_id)
+        except LobbyNotificationError:
+            # If room not created yet, there is no participants to notify
+            pass
+
         cache_key = self._get_cache_key(room_id, participant_id)
         cache.set(
             cache_key,
@@ -228,12 +239,6 @@ class LobbyService:
             timeout=settings.LOBBY_WAITING_TIMEOUT,
         )
 
-        try:
-            self.notify_participants(room_id=room_id)
-        except LobbyNotificationError:
-            # If room not created yet, there is no participants to notify
-            pass
-
         return participant
 
     def _get_participant(
@@ -343,7 +348,18 @@ class LobbyService:
         }
 
         lkapi = LiveKitAPI(**settings.LIVEKIT_CONFIGURATION)
+
         try:
+            room_response = await lkapi.room.list_rooms(
+                ListRoomsRequest(
+                    names=[str(room_id)],
+                )
+            )
+
+            # Check if the room exists
+            if not room_response.rooms:
+                return
+
             await lkapi.room.send_data(
                 SendDataRequest(
                     room=str(room_id),

src/backend/core/tests/services/test_lobby.py

@@ -776,6 +776,43 @@ def test_update_participant_status_success(mock_cache, lobby_service, participan
     lobby_service._get_cache_key.assert_called_once_with(room.id, participant_id)
 
 
+@mock.patch("core.services.lobby.LiveKitAPI")
+def test_notify_participants_success_no_room(mock_livekit_api, lobby_service):
+    """Test the notify_participants method when the LiveKit room doesn't exist yet."""
+    room = RoomFactory(access_level=RoomAccessLevel.RESTRICTED)
+
+    # Set up the mock LiveKitAPI and its behavior
+    mock_api_instance = mock.Mock()
+    mock_api_instance.room = mock.Mock()
+    mock_api_instance.room.send_data = mock.AsyncMock()
+
+    # Create a proper response object with an empty rooms list
+    class MockResponse:
+        """LiveKit API response mock with empty rooms list."""
+
+        rooms = []
+
+    mock_api_instance.room.list_rooms = mock.AsyncMock(return_value=MockResponse())
+    mock_api_instance.aclose = mock.AsyncMock()
+    mock_livekit_api.return_value = mock_api_instance
+
+    # Act
+    lobby_service.notify_participants(room.id)
+
+    # Assert
+    # Verify the API was initialized with correct configuration
+    mock_livekit_api.assert_called_once_with(**settings.LIVEKIT_CONFIGURATION)
+
+    # Verify that the service checked for existing rooms
+    mock_api_instance.room.list_rooms.assert_called_once()
+
+    # Verify the send_data method was not called since no room exists
+    mock_api_instance.room.send_data.assert_not_called()
+
+    # Verify the connection was properly closed
+    mock_api_instance.aclose.assert_called_once()
+
+
 @mock.patch("core.services.lobby.LiveKitAPI")
 def test_notify_participants_success(mock_livekit_api, lobby_service):
     """Test successful participant notification."""
@@ -784,6 +821,14 @@ def test_notify_participants_success(mock_livekit_api, lobby_service):
     mock_api_instance = mock.Mock()
     mock_api_instance.room = mock.Mock()
     mock_api_instance.room.send_data = mock.AsyncMock()
+
+    class MockResponse:
+        """LiveKit API response mock with empty rooms list."""
+
+        rooms = ["room-1"]
+
+    mock_api_instance.room.list_rooms = mock.AsyncMock(return_value=MockResponse())
+
     mock_api_instance.aclose = mock.AsyncMock()
     mock_livekit_api.return_value = mock_api_instance
 
@@ -793,6 +838,9 @@ def test_notify_participants_success(mock_livekit_api, lobby_service):
     # Verify the API was called correctly
     mock_livekit_api.assert_called_once_with(**settings.LIVEKIT_CONFIGURATION)
 
+    # Verify that the service checked for existing rooms
+    mock_api_instance.room.list_rooms.assert_called_once()
+
     # Verify the send_data method was called
     mock_api_instance.room.send_data.assert_called_once()
     send_data_request = mock_api_instance.room.send_data.call_args[0][0]
@@ -817,6 +865,14 @@ def test_notify_participants_error(mock_livekit_api, lobby_service):
     mock_api_instance.room.send_data = mock.AsyncMock(
         side_effect=TwirpError(msg="test error", code=123)
     )
+
+    class MockResponse:
+        """LiveKit API response mock with empty rooms list."""
+
+        rooms = ["room-1"]
+
+    mock_api_instance.room.list_rooms = mock.AsyncMock(return_value=MockResponse())
+
     mock_api_instance.aclose = mock.AsyncMock()
     mock_livekit_api.return_value = mock_api_instance
 
@@ -829,6 +885,9 @@ def test_notify_participants_error(mock_livekit_api, lobby_service):
     # Verify the API was called correctly
     mock_livekit_api.assert_called_once_with(**settings.LIVEKIT_CONFIGURATION)
 
+    # Verify that the service checked for existing rooms
+    mock_api_instance.room.list_rooms.assert_called_once()
+
     # Verify send_data was called
     mock_api_instance.room.send_data.assert_called_once()
 

src/backend/meet/settings.py

@@ -19,6 +19,7 @@ from django.utils.translation import gettext_lazy as _
 import sentry_sdk
 from configurations import Configuration, values
 from sentry_sdk.integrations.django import DjangoIntegration
+from sentry_sdk.integrations.logging import ignore_logger
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -575,6 +576,9 @@ class Base(Configuration):
             scope = sentry_sdk.get_global_scope()
             scope.set_tag("application", "backend")
 
+            # Ignore the logs added by the DockerflowMiddleware
+            ignore_logger("request.summary")
+
 
 class Build(Base):
     """Settings used when the application is built.

src/backend/pyproject.toml

@@ -25,7 +25,7 @@ license = { file = "LICENSE" }
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "boto3==1.37.4",
+    "boto3==1.37.18",
     "Brotli==1.1.0",
     "brevo-python==1.1.2",
     "celery[redis]==5.4.0",
@@ -48,16 +48,16 @@ dependencies = [
     "june-analytics-python==2.3.0",
     "markdown==3.7",
     "nested-multipart-parser==1.5.0",
-    "psycopg[binary]==3.2.5",
+    "psycopg[binary]==3.2.6",
     "PyJWT==2.10.1",
     "python-frontmatter==1.1.0",
     "requests==2.32.3",
-    "sentry-sdk==2.22.0",
+    "sentry-sdk==2.24.1",
     "url-normalize==1.4.3",
     "whitenoise==6.9.0",
     "mozilla-django-oidc==4.0.1",
     "livekit-api==0.8.2",
-    "aiohttp==3.11.13",
+    "aiohttp==3.11.14",
 ]
 
 [project.urls]
@@ -72,18 +72,18 @@ dev = [
     "drf-spectacular-sidecar==2025.3.1",
     "freezegun==1.5.1",
     "ipdb==0.13.13",
-    "ipython==9.0.1",
-    "pyfakefs==5.7.4",
+    "ipython==9.0.2",
+    "pyfakefs==5.8.0",
     "pylint-django==2.6.1",
-    "pylint==3.3.4",
+    "pylint==3.3.6",
     "pytest-cov==6.0.0",
     "pytest-django==4.10.0",
     "pytest==8.3.5",
     "pytest-icdiff==0.9",
     "pytest-xdist==3.6.1",
-    "responses==0.25.6",
-    "ruff==0.9.9",
-    "types-requests==2.32.0.20250301",
+    "responses==0.25.7",
+    "ruff==0.11.2",
+    "types-requests==2.32.0.20250306",
 ]
 
 [tool.setuptools]

src/frontend/panda.config.ts

@@ -35,40 +35,7 @@ const config: Config = {
   exclude: [],
   jsxFramework: 'react',
   outdir: 'src/styled-system',
-  globalFontface: {
-    Marianne: [
-      {
-        src: 'url(/fonts/Marianne-Regular-subset.woff2) format("woff2")',
-        fontWeight: 400,
-        fontStyle: 'normal',
-        fontDisplay: 'swap',
-      },
-      {
-        path: 'url(/fonts/Marianne-Regular_Italic-subset.woff2) format("woff2")',
-        fontWeight: 400,
-        fontStyle: 'italic',
-        fontDisplay: 'swap',
-      },
-      {
-        path: 'url(/fonts/Marianne-Medium-subset.woff2) format("woff2")',
-        fontWeight: 500,
-        fontStyle: 'normal',
-        fontDisplay: 'swap',
-      },
-      {
-        path: 'url(/fonts/Marianne-Bold-subset.woff2) format("woff2")',
-        fontWeight: 700,
-        fontStyle: 'normal',
-        fontDisplay: 'swap',
-      },
-      {
-        path: 'url(/fonts/Marianne-ExtraBold-subset.woff2) format("woff2")',
-        fontWeight: 800,
-        fontStyle: 'normal',
-        fontDisplay: 'swap',
-      },
-    ],
-  },
+  globalFontface: {},
   theme: {
     ...pandaPreset.theme,
     // media queries are defined in em so that zooming with text-only mode triggers breakpoints

src/frontend/src/features/home/components/IntroSlider.tsx

@@ -18,9 +18,9 @@ const Heading = styled('h2', {
     width: 'fit-content',
     marginBottom: 0,
     fontSize: '1.3rem',
-    fontWeight: '600',
+    fontWeight: '700',
     marginTop: '0.75rem',
-    lineHeight: '2rem',
+    lineHeight: '1.7rem',
     maxWidth: '23rem',
     textAlign: 'center',
     textWrap: 'balance',

src/frontend/src/features/home/routes/Home.tsx

@@ -120,7 +120,7 @@ const Separator = styled('div', {
 
 const Heading = styled('h1', {
   base: {
-    fontWeight: '600',
+    fontWeight: '700',
     fontStyle: 'normal',
     fontStretch: 'normal',
     fontOpticalSizing: 'auto',

src/frontend/src/features/rooms/livekit/components/ReactionPortal.tsx

@@ -75,7 +75,7 @@ export function FloatingReaction({
     >
       <span
         className={css({
-          lineHeight: '45px',
+          lineHeight: '57px',
         })}
       >
         {emoji}
@@ -89,9 +89,10 @@ export function FloatingReaction({
             textAlign: 'center',
             borderRadius: '20px',
             paddingX: '0.5rem',
-            paddingY: '0.15rem',
+            paddingBottom: '0.3125rem',
+            paddingTop: '0.15rem',
             boxShadow: '0 2px 4px rgba(0, 0, 0, 0.1)',
-            lineHeight: '14px',
+            lineHeight: '16px',
           })}
         >
           {name}

src/frontend/src/features/rooms/livekit/components/effects/Effects.tsx

@@ -13,6 +13,7 @@ export const Effects = () => {
     <div
       className={css({
         padding: '0 1.5rem',
+        overflowY: 'scroll',
       })}
     >
       <EffectsConfiguration

src/frontend/src/layout/Footer.tsx

@@ -106,7 +106,7 @@ const Marianne = () => {
         className={css({
           letterSpacing: '-.01em',
           textTransform: 'uppercase',
-          fontWeight: '600',
+          fontWeight: '700',
           fontFamily: 'Marianne',
           fontSize: '1.25rem',
           lineHeight: '1.75rem',

src/frontend/src/layout/Header.tsx

@@ -44,7 +44,7 @@ const Marianne = () => {
         className={css({
           letterSpacing: '-.01em',
           textTransform: 'uppercase',
-          fontWeight: '600',
+          fontWeight: '700',
           fontFamily: 'Marianne',
           fontSize: '0.7875rem !important',
         })}

src/frontend/src/primitives/Field.tsx

@@ -44,7 +44,7 @@ const FieldWrapper = styled('div', {
 const StyledLabel = styled(Label, {
   base: {
     display: 'block',
-    fontSize: '0.75rem',
+    fontSize: '0.875rem',
   },
   variants: {
     center: {

src/frontend/src/styles/fonts.css

@@ -30,6 +30,46 @@
   font-display: swap;
 }
 
+@font-face {
+  font-family: 'Marianne';
+  src: url('/fonts/Marianne-Regular-subset.woff2') format('woff2');
+  font-weight: 400;
+  font-style: normal;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: 'Marianne';
+  src: url('/fonts/Marianne-Regular_Italic-subset.woff2') format('woff2');
+  font-weight: 400;
+  font-style: italic;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: 'Marianne';
+  src: url('/fonts/Marianne-Medium-subset.woff2') format('woff2');
+  font-weight: 500;
+  font-style: normal;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: 'Marianne';
+  src: url('/fonts/Marianne-Bold-subset.woff2') format('woff2');
+  font-weight: 700;
+  font-style: normal;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: 'Marianne';
+  src: url('/fonts/Marianne-ExtraBold-subset.woff2') format('woff2');
+  font-weight: 800;
+  font-style: normal;
+  font-display: swap;
+}
+
 /*
 * to reduce CLS
 * values taken from https://github.com/khempenius/font-fallbacks-dataset/blob/main/font-metric-overrides.csv#L2979

src/summary/pyproject.toml

@@ -10,14 +10,14 @@ dependencies = [
     "celery==5.4.0",
     "redis==5.2.1",
     "minio==7.2.15",
-    "openai==1.65.2",
+    "openai==1.68.2",
     "requests==2.32.3",
-    "sentry-sdk[fastapi, celery]==2.22.0",
+    "sentry-sdk[fastapi, celery]==2.24.1",
 ]
 
 [project.optional-dependencies]
 dev = [
-    "ruff==0.9.9",
+    "ruff==0.11.2",
 ]
 
 [build-system]