make API formatter loadable from project directory

src/nominatim_api/server/falcon/server.py

@@ -17,8 +17,7 @@ from falcon.asgi import App, Request, Response
 from ...config import Configuration
 from ...core import NominatimAPIAsync
 from ... import v1 as api_impl
-from ...result_formatting import FormatDispatcher
-from ...v1.format import dispatch as formatting
+from ...result_formatting import FormatDispatcher, load_format_dispatcher
 from ... import logging as loglib
 from ..asgi_adaptor import ASGIAdaptor, EndpointFunc
 
@@ -64,10 +63,12 @@ class ParamWrapper(ASGIAdaptor):
     """ Adaptor class for server glue to Falcon framework.
     """
 
-    def __init__(self, req: Request, resp: Response, config: Configuration) -> None:
+    def __init__(self, req: Request, resp: Response,
+                 config: Configuration, formatter: FormatDispatcher) -> None:
         self.request = req
         self.response = resp
         self._config = config
+        self._formatter = formatter
 
 
     def get(self, name: str, default: Optional[str] = None) -> Optional[str]:
@@ -96,23 +97,26 @@ class ParamWrapper(ASGIAdaptor):
         return self._config
 
     def formatting(self) -> FormatDispatcher:
-        return formatting
+        return self._formatter
 
 
 class EndpointWrapper:
     """ Converter for server glue endpoint functions to Falcon request handlers.
     """
 
-    def __init__(self, name: str, func: EndpointFunc, api: NominatimAPIAsync) -> None:
+    def __init__(self, name: str, func: EndpointFunc, api: NominatimAPIAsync,
+                 formatter: FormatDispatcher) -> None:
         self.name = name
         self.func = func
         self.api = api
+        self.formatter = formatter
 
 
     async def on_get(self, req: Request, resp: Response) -> None:
         """ Implementation of the endpoint.
         """
-        await self.func(self.api, ParamWrapper(req, resp, self.api.config))
+        await self.func(self.api, ParamWrapper(req, resp, self.api.config,
+                                               self.formatter))
 
 
 class FileLoggingMiddleware:
@@ -182,8 +186,9 @@ def get_application(project_dir: Path,
     app.add_error_handler(asyncio.TimeoutError, timeout_error_handler)
 
     legacy_urls = api.config.get_bool('SERVE_LEGACY_URLS')
+    formatter = load_format_dispatcher('v1', project_dir)
     for name, func in api_impl.ROUTES:
-        endpoint = EndpointWrapper(name, func, api)
+        endpoint = EndpointWrapper(name, func, api, formatter)
         app.add_route(f"/{name}", endpoint)
         if legacy_urls:
             app.add_route(f"/{name}.php", endpoint)