🔧(backend) add FRONTEND_THEME setting

The frontend need to know the theme to be used,
so we need to add a new setting to the backend,
in order to expose this value to the frontend.

env.d/development/common.dist

@@ -48,3 +48,6 @@ AI_MODEL=llama
 
 # Collaboration
 COLLABORATION_SERVER_URL=ws://localhost:4444
+
+# Frontend
+FRONTEND_THEME=dsfr

src/backend/core/api/viewsets.py

@@ -901,8 +901,9 @@ class ConfigView(views.APIView):
             Return a dictionary of public settings.
         """
         array_settings = [
-            "ENVIRONMENT",
             "COLLABORATION_SERVER_URL",
+            "ENVIRONMENT",
+            "FRONTEND_THEME",
             "MEDIA_BASE_URL",
             "LANGUAGES",
             "LANGUAGE_CODE",

src/backend/core/tests/test_api_config.py

@@ -16,9 +16,10 @@ pytestmark = pytest.mark.django_db
 
 
 @override_settings(
-    SENTRY_DSN="https://sentry.test/123",
-    MEDIA_BASE_URL="http://testserver/",
     COLLABORATION_SERVER_URL="http://testcollab/",
+    FRONTEND_THEME="test-theme",
+    MEDIA_BASE_URL="http://testserver/",
+    SENTRY_DSN="https://sentry.test/123",
 )
 def test_api_config_anonymous():
     """Anonymous users should be allowed to get the configuration."""
@@ -27,18 +28,20 @@ def test_api_config_anonymous():
     assert response.status_code == HTTP_200_OK
     assert response.json() == {
         "COLLABORATION_SERVER_URL": "http://testcollab/",
+        "ENVIRONMENT": "test",
+        "FRONTEND_THEME": "test-theme",
         "LANGUAGES": [["en-us", "English"], ["fr-fr", "French"], ["de-de", "German"]],
         "LANGUAGE_CODE": "en-us",
-        "SENTRY_DSN": "https://sentry.test/123",
-        "ENVIRONMENT": "test",
         "MEDIA_BASE_URL": "http://testserver/",
+        "SENTRY_DSN": "https://sentry.test/123",
     }
 
 
 @override_settings(
-    SENTRY_DSN="https://sentry.test/123",
-    MEDIA_BASE_URL="http://testserver/",
     COLLABORATION_SERVER_URL="http://testcollab/",
+    FRONTEND_THEME="test-theme",
+    MEDIA_BASE_URL="http://testserver/",
+    SENTRY_DSN="https://sentry.test/123",
 )
 def test_api_config_authenticated():
     """Authenticated users should be allowed to get the configuration."""
@@ -51,9 +54,10 @@ def test_api_config_authenticated():
     assert response.status_code == HTTP_200_OK
     assert response.json() == {
         "COLLABORATION_SERVER_URL": "http://testcollab/",
+        "ENVIRONMENT": "test",
+        "FRONTEND_THEME": "test-theme",
+        "MEDIA_BASE_URL": "http://testserver/",
         "LANGUAGES": [["en-us", "English"], ["fr-fr", "French"], ["de-de", "German"]],
         "LANGUAGE_CODE": "en-us",
         "SENTRY_DSN": "https://sentry.test/123",
-        "ENVIRONMENT": "test",
-        "MEDIA_BASE_URL": "http://testserver/",
     }

src/backend/impress/settings.py

@@ -382,6 +382,11 @@ class Base(Configuration):
         None, environ_name="COLLABORATION_SERVER_URL", environ_prefix=None
     )
 
+    # Frontend
+    FRONTEND_THEME = values.Value(
+        None, environ_name="FRONTEND_THEME", environ_prefix=None
+    )
+
     # Easy thumbnails
     THUMBNAIL_EXTENSION = "webp"
     THUMBNAIL_TRANSPARENCY_EXTENSION = "webp"