1 files changed, 82 insertions, 0 deletions
diff --git a/searx/extended_types.py b/searx/extended_types.py
new file mode 100644
index 000000000..41e3a56a9
--- /dev/null
+++ b/searx/extended_types.py
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+"""This module implements the type extensions applied by SearXNG.
+
+- :py:obj:`flask.request` is replaced by :py:obj:`sxng_request`
+- :py:obj:`flask.Request` is replaced by :py:obj:`SXNG_Request`
+- :py:obj:`httpx.response` is replaced by :py:obj:`SXNG_Response`
+
+----
+
+.. py:attribute:: sxng_request
+   :type: SXNG_Request
+
+   A replacement for :py:obj:`flask.request` with type cast :py:obj:`SXNG_Request`.
+
+.. autoclass:: SXNG_Request
+   :members:
+
+.. autoclass:: SXNG_Response
+   :members:
+
+"""
+# pylint: disable=invalid-name
+from __future__ import annotations
+
+__all__ = ["SXNG_Request", "sxng_request", "SXNG_Response"]
+
+import typing
+import flask
+import httpx
+
+if typing.TYPE_CHECKING:
+    import searx.preferences
+    import searx.results
+
+
+class SXNG_Request(flask.Request):
+    """SearXNG extends the class :py:obj:`flask.Request` with properties from
+    *this* class definition, see type cast :py:obj:`sxng_request`.
+    """
+
+    user_plugins: list[str]
+    """list of searx.plugins.Plugin.id (the id of the plugins)"""
+
+    preferences: "searx.preferences.Preferences"
+    """The prefernces of the request."""
+
+    errors: list[str]
+    """A list of errors (translated text) added by :py:obj:`searx.webapp` in
+    case of errors."""
+    # request.form is of type werkzeug.datastructures.ImmutableMultiDict
+    # form: dict[str, str]
+
+    start_time: float
+    """Start time of the request, :py:obj:`timeit.default_timer` added by
+    :py:obj:`searx.webapp` to calculate the total time of the request."""
+
+    render_time: float
+    """Duration of the rendering, calculated and added by
+    :py:obj:`searx.webapp`."""
+
+    timings: list["searx.results.Timing"]
+    """A list of :py:obj:`searx.results.Timing` of the engines, calculatid in
+    and hold by :py:obj:`searx.results.ResultContainer.timings`."""
+
+
+#: A replacement for :py:obj:`flask.request` with type cast :py:`SXNG_Request`.
+sxng_request = typing.cast(SXNG_Request, flask.request)
+
+
+class SXNG_Response(httpx.Response):
+    """SearXNG extends the class :py:obj:`httpx.Response` with properties from
+    *this* class (type cast of :py:obj:`httpx.Response`).
+
+    .. code:: python
+
+       response = httpx.get("https://example.org")
+       response = typing.cast(SXNG_Response, response)
+       if response.ok:
+          ...
+    """
+
+    ok: bool