feat: added oAuth client creditinals

LiveReview Pre-Commit Check: ran (iter:1, coverage:0%)

Author: SahilJat

api/app/settings/common.py

@@ -904,11 +904,15 @@
     "ROTATE_REFRESH_TOKEN": True,
     "PKCE_REQUIRED": True,
     "ALLOWED_CODE_CHALLENGE_METHODS": ["S256"],
-    "SCOPES": {"mcp": "MCP access"},
+    "SCOPES": {
+        "mcp": "MCP access",
+        "scim": "SCIM provisioning access",       
+        },
     "DEFAULT_SCOPES": ["mcp"],
     "ALLOWED_GRANT_TYPES": [
         "authorization_code",
         "refresh_token",
+        "client_credentials",
     ],
 }
 

api/oauth2_metadata/views.py

@@ -29,6 +29,10 @@ def authorization_server_metadata(request: HttpRequest) -> JsonResponse:
     frontend_url: str = settings.FLAGSMITH_FRONTEND_URL.rstrip("/")
     oauth2_settings: dict[str, Any] = settings.OAUTH2_PROVIDER
     scopes: dict[str, str] = oauth2_settings.get("SCOPES", {})
+    allowed_grant_types: list[str] = oauth2_settings.get(
+        "ALLOWED_GRANT_TYPES",
+        ["authorization_code", "refresh_token"],
+    )
 
     metadata = {
         "issuer": api_url,
@@ -39,7 +43,7 @@ def authorization_server_metadata(request: HttpRequest) -> JsonResponse:
         "introspection_endpoint": f"{api_url}/o/introspect/",
         "scopes_supported": list(scopes.keys()),
         "response_types_supported": ["code"],
-        "grant_types_supported": ["authorization_code", "refresh_token"],
+        "grant_types_supported": allowed_grant_types,
         "code_challenge_methods_supported": ["S256"],
         "token_endpoint_auth_methods_supported": [
             "client_secret_basic",

api/tests/unit/oauth2_metadata/test_views.py

@@ -108,3 +108,54 @@ def test_metadata_endpoint__post_request__returns_405() -> None:
 
     # Then
     assert response.status_code == status.HTTP_405_METHOD_NOT_ALLOWED
+
+
+def test_metadata_endpoint__grant_types__derived_from_allowed_grant_types_setting(
+    client: Client,
+    settings: SettingsWrapper,
+) -> None:
+    # Given
+    settings.OAUTH2_PROVIDER = {
+        **settings.OAUTH2_PROVIDER,
+        "ALLOWED_GRANT_TYPES": ["authorization_code", "client_credentials"],
+    }
+
+    # When
+    response = client.get(reverse(METADATA_URL))
+
+    # Then
+    data = response.json()
+    assert data["grant_types_supported"] == ["authorization_code", "client_credentials"]
+
+
+def test_metadata_endpoint__grant_types__include_client_credentials_by_default(
+    client: Client,
+    settings: SettingsWrapper,
+) -> None:
+    # Given
+    # Use real settings which now include client_credentials
+    settings.FLAGSMITH_API_URL = "https://api.flagsmith.com"
+    settings.FLAGSMITH_FRONTEND_URL = "https://app.flagsmith.com"
+
+    # When
+    response = client.get(reverse(METADATA_URL))
+
+    # Then
+    data = response.json()
+    assert "client_credentials" in data["grant_types_supported"]
+
+
+def test_metadata_endpoint__scim_scope__present_in_scopes_supported(
+    client: Client,
+    settings: SettingsWrapper,
+) -> None:
+    # Given
+    settings.FLAGSMITH_API_URL = "https://api.flagsmith.com"
+    settings.FLAGSMITH_FRONTEND_URL = "https://app.flagsmith.com"
+
+    # When
+    response = client.get(reverse(METADATA_URL))
+
+    # Then
+    data = response.json()
+    assert "scim" in data["scopes_supported"]