fix: REST paths

lnbits/core/extensions/loader.py

@@ -46,7 +46,7 @@ def register_wasm_extension(app: FastAPI, ext_id: str) -> WasmExtension:
     loaded = load_wasm_extension(ext_id)
     _mount_wasm_extension_static(app, loaded)
     _register_wasm_extension_routes(app, loaded)
-    _register_wasm_extension_invoke_route(app, loaded)
+    _register_wasm_extension_api_routes(app, loaded)
 
     extensions = getattr(app.state, "lnbits_wasm_extensions", {})
     extensions[ext_id] = loaded
@@ -114,23 +114,29 @@ def _register_wasm_extension_routes(app: FastAPI, extension: WasmExtension) -> N
         _add_wasm_extension_page_route(app, extension, route_path, entrypoint)
 
 
-def _register_wasm_extension_invoke_route(
+def _register_wasm_extension_api_routes(app: FastAPI, extension: WasmExtension) -> None:
+    for route_config in extension.config.get("api_routes") or []:
+        _add_wasm_extension_api_route(app, extension, route_config)
+
+
+def _add_wasm_extension_api_route(
     app: FastAPI,
     extension: WasmExtension,
+    route_config: dict[str, Any],
 ) -> None:
-    route_path = f"/api/v1/extensions/{extension.id}/invoke/{{export_name}}"
-    if any(getattr(route, "path", None) == route_path for route in app.routes):
+    method = _wasm_extension_api_method(extension, route_config.get("method"))
+    route_path = _wasm_extension_api_path(extension, route_config.get("path"))
+    export_name = _wasm_extension_api_export(extension, route_config.get("export"))
+    path_params = route_config.get("path_params") or {}
+
+    if _has_route(app, route_path, method):
         return
 
-    async def invoke_wasm_extension_export(
-        export_name: str,
-        request: Request,
-    ) -> dict[str, Any]:
+    async def invoke_wasm_extension_export(request: Request) -> dict[str, Any]:
         from .wasm import invoke_wasm_extension_export as invoke_export
 
         try:
-            _require_http_wasm_export(extension, export_name)
-            payload = await _read_json_object(request)
+            payload = await _read_api_payload(request, path_params)
             return await invoke_export(
                 app,
                 extension.id,
@@ -147,34 +153,95 @@ def _register_wasm_extension_invoke_route(
     app.add_api_route(
         route_path,
         invoke_wasm_extension_export,
-        methods=["POST"],
-        name=f"{extension.id}:invoke",
+        methods=[method],
+        name=f"{extension.id}:{method}:{route_path}",
         include_in_schema=False,
     )
 
 
+async def _read_api_payload(
+    request: Request,
+    path_params: dict[str, str],
+) -> dict[str, Any]:
+    payload = _read_api_path_params(request, path_params)
+    payload.update(_read_api_query_params(request))
+    if request.method in {"POST", "PUT", "PATCH"}:
+        payload.update(await _read_json_object(request))
+    return payload
+
+
 async def _read_json_object(request: Request) -> dict[str, Any]:
     body = await request.body()
     if not body:
         return {}
     value = json.loads(body)
     if not isinstance(value, dict):
-        raise TypeError("WASM extension invoke payload must be a JSON object.")
+        raise TypeError("WASM extension API payload must be a JSON object.")
     return value
 
 
-def _require_http_wasm_export(extension: WasmExtension, export_name: str) -> None:
+def _read_api_path_params(
+    request: Request,
+    path_params: dict[str, str],
+) -> dict[str, Any]:
+    payload: dict[str, Any] = {}
+    for key, value in request.path_params.items():
+        target = path_params.get(key) or _snake_to_camel(key)
+        payload[target] = value
+    return payload
+
+
+def _read_api_query_params(request: Request) -> dict[str, Any]:
+    return {_snake_to_camel(key): value for key, value in request.query_params.items()}
+
+
+def _wasm_extension_api_export(extension: WasmExtension, export_name: Any) -> str:
+    if not isinstance(export_name, str) or not export_name:
+        raise ValueError(f"Invalid API export for WASM extension '{extension.id}'.")
+
     for export in extension.exports:
         if export.get("name") != export_name:
             continue
         if export.get("visibility") in {"public", "authenticated"}:
-            return
+            return export_name
         raise PermissionError(
             f"WASM export '{export_name}' is not callable over HTTP."
         )
     raise KeyError(f"WASM extension '{extension.id}' has no export '{export_name}'.")
 
 
+def _wasm_extension_api_method(extension: WasmExtension, method: Any) -> str:
+    if not isinstance(method, str):
+        raise ValueError(f"Invalid API method for WASM extension '{extension.id}'.")
+    method = method.upper()
+    if method not in {"GET", "POST", "PUT", "PATCH", "DELETE"}:
+        raise ValueError(f"Unsupported API method for WASM extension '{extension.id}'.")
+    return method
+
+
+def _wasm_extension_api_path(extension: WasmExtension, path: Any) -> str:
+    if not isinstance(path, str) or not path.startswith("/"):
+        raise ValueError(f"Invalid API path for WASM extension '{extension.id}'.")
+    if path == "/":
+        return f"/api/v1/ext/{extension.id}"
+    return f"/api/v1/ext/{extension.id}{path}"
+
+
+def _has_route(app: FastAPI, route_path: str, method: str) -> bool:
+    for route in app.routes:
+        if getattr(route, "path", None) != route_path:
+            continue
+        methods = getattr(route, "methods", set()) or set()
+        if method in methods:
+            return True
+    return False
+
+
+def _snake_to_camel(value: str) -> str:
+    head, *tail = value.split("_")
+    return head + "".join(part.capitalize() for part in tail)
+
+
 def _add_wasm_extension_page_route(
     app: FastAPI,
     extension: WasmExtension,