Added the initial application with the main account list, the pagination, the query, the permission, the localization, the documentation, the test case, and a test demonstration site.

src/accounting/__init__.py

@@ -0,0 +1,57 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/25
+
+#  Copyright (c) 2023 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 accounting application.
+
+"""
+import typing as t
+
+from flask import Flask, Blueprint
+
+
+def init_app(app: Flask, url_prefix: str = "/accounting",
+             can_view_func: t.Callable[[], bool] | None = None,
+             can_edit_func: t.Callable[[], bool] | None = None) -> None:
+    """Initialize the application.
+
+    :param app: The Flask application.
+    :param url_prefix: The URL prefix of the accounting application.
+    :param can_view_func: A callback that returns whether the current user can
+        view the accounting data.
+    :param can_edit_func: A callback that returns whether the current user can
+        edit the accounting data.
+    :return: None.
+    """
+    # The database instance must be set before loading everything
+    # in the application.
+    from .database import set_db
+    set_db(app.extensions["sqlalchemy"])
+
+    bp: Blueprint = Blueprint("accounting", __name__,
+                              url_prefix=url_prefix,
+                              template_folder="templates",
+                              static_folder="static")
+
+    from . import locale
+    locale.init_app(app, bp)
+
+    from .utils import permission
+    permission.init_app(app, can_view_func, can_edit_func)
+
+    from . import base_account
+    base_account.init_app(app, bp)
+
+    app.register_blueprint(bp)