Renamed "voucher" to "journal entry".

src/accounting/journal_entry/converters.py

@@ -0,0 +1,107 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/2/19
+
+#  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 path converters for the journal entry management.
+
+"""
+from datetime import date
+
+from flask import abort
+from sqlalchemy.orm import selectinload
+from werkzeug.routing import BaseConverter
+
+from accounting.models import JournalEntry, JournalEntryLineItem
+from accounting.utils.journal_entry_types import JournalEntryType
+
+
+class JournalEntryConverter(BaseConverter):
+    """The journal entry converter to convert the journal entry ID from and to
+    the corresponding journal entry in the routes."""
+
+    def to_python(self, value: str) -> JournalEntry:
+        """Converts a journal entry ID to a journal entry.
+
+        :param value: The journal entry ID.
+        :return: The corresponding journal entry.
+        """
+        journal_entry: JournalEntry | None = JournalEntry.query\
+            .join(JournalEntryLineItem)\
+            .filter(JournalEntry.id == value)\
+            .options(selectinload(JournalEntry.line_items)
+                     .selectinload(JournalEntryLineItem.offsets)
+                     .selectinload(JournalEntryLineItem.journal_entry))\
+            .first()
+        if journal_entry is None:
+            abort(404)
+        return journal_entry
+
+    def to_url(self, value: JournalEntry) -> str:
+        """Converts a journal entry to its ID.
+
+        :param value: The journal entry.
+        :return: The ID.
+        """
+        return str(value.id)
+
+
+class JournalEntryTypeConverter(BaseConverter):
+    """The journal entry converter to convert the journal entry type ID from
+    and to the corresponding journal entry type in the routes."""
+
+    def to_python(self, value: str) -> JournalEntryType:
+        """Converts a journal entry ID to a journal entry.
+
+        :param value: The journal entry ID.
+        :return: The corresponding journal entry type.
+        """
+        type_dict: dict[str, JournalEntryType] \
+            = {x.value: x for x in JournalEntryType}
+        journal_entry_type: JournalEntryType | None = type_dict.get(value)
+        if journal_entry_type is None:
+            abort(404)
+        return journal_entry_type
+
+    def to_url(self, value: JournalEntryType) -> str:
+        """Converts a journal entry type to its ID.
+
+        :param value: The journal entry type.
+        :return: The ID.
+        """
+        return str(value.value)
+
+
+class DateConverter(BaseConverter):
+    """The date converter to convert the ISO date from and to the
+    corresponding date in the routes."""
+
+    def to_python(self, value: str) -> date:
+        """Converts an ISO date to a date.
+
+        :param value: The ISO date.
+        :return: The corresponding date.
+        """
+        try:
+            return date.fromisoformat(value)
+        except ValueError:
+            abort(404)
+
+    def to_url(self, value: date) -> str:
+        """Converts a date to its ISO date.
+
+        :param value: The date.
+        :return: The ISO date.
+        """
+        return value.isoformat()