Revised the calculation of "today" to use the client's timezone instead of the server's timezone.

src/accounting/utils/timezone.py

@@ -0,0 +1,37 @@
+# The Mia! Accounting Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2024/6/4
+
+#  Copyright (c) 2024 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The timezone utility.
+
+This module should not import any other module from the application.
+
+"""
+
+import datetime as dt
+
+import pytz
+from flask import request
+
+
+def get_tz_today() -> dt.date:
+    """Returns today in the client timezone.
+
+    :return: today in the client timezone.
+    """
+    tz_name: str | None = request.cookies.get("accounting-tz")
+    if tz_name is None:
+        return dt.date.today()
+    return dt.datetime.now(tz=pytz.timezone(tz_name)).date()