Revised to capitalize the account titles when initializing the base accounts instead of when displaying the account titles, so that the titles of the user-added accounts are not capitalized incorrectly.

src/accounting/utils/title_case.py

@@ -0,0 +1,59 @@
+# The Mia! Accounting Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/7/29
+
+#  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 title case capitalization for the base account titles.
+This follows the APA style title case capitalization.  See
+https://apastyle.apa.org/style-grammar-guidelines/capitalization/title-case .
+
+This module should not import any other module from the application.
+
+"""
+import re
+
+CONJUNCTIONS: set[str] = {"and", "as", "but", "for", "if", "nor", "or", "so",
+                          "yet"}
+"""Short conjunctions."""
+ARTICLES: set[str] = {"a", "an", "the"}
+"""Articles."""
+PREPOSITIONS: set[str] = {"as", "at", "by", "for", "in", "of", "on", "per",
+                          "to", "up", "via"}
+"""Short prepositions."""
+MINOR_WORDS: set[str] \
+    = CONJUNCTIONS.copy().union(ARTICLES).union(PREPOSITIONS)
+"""Minor words that should be in lowercase."""
+# Excludes "by" as in "1223 by-products"
+MINOR_WORDS.remove("by")
+
+
+def title_case(s: str) -> str:
+    """Capitalize a title string for the base account titles.  Do not use it
+    in other places.  This excludes "by" as in "1223 by-products".
+
+    :param s: The title string.
+    :return: The capitalized title string.
+    """
+    return re.sub(r"\w+", __cap_word, s)
+
+
+def __cap_word(m: re.Match) -> str:
+    """Capitalize a matched title word.
+
+    :param m: The matched title word.
+    :return: The capitalized title word.
+    """
+    if m.group(0).lower() in MINOR_WORDS:
+        return m.group(0)
+    return m.group(0).title()