mia-accounting/src/accounting/locale.py

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# 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 localization for the accounting application.
"""
import json
from pathlib import Path
from flask import Flask, Response, Blueprint
from flask_babel import LazyString, Domain
from flask_babel_js import JAVASCRIPT, c2js
translation_dir: Path = Path(__file__).parent / "translations"
domain: Domain = Domain(translation_directories=[translation_dir],
domain="accounting")
def gettext(string, **variables) -> str:
"""A replacement of the Babel gettext() function..
:param string: The message to translate.
:param variables: The variable substitution.
:return: The translated message.
"""
return domain.gettext(string, **variables)
def pgettext(context, string, **variables) -> str:
"""A replacement of the Babel gettext() function..
:param context: The context.
:param string: The message to translate.
:param variables: The variable substitution.
:return: The translated message.
"""
return domain.pgettext(context, string, **variables)
def lazy_gettext(string, **variables) -> LazyString:
"""A replacement of the Babel lazy_gettext() function..
:param string: The message to translate.
:param variables: The variable substitution.
:return: The translated message.
"""
return domain.lazy_gettext(string, **variables)
def __babel_js_catalog_view() -> Response:
"""A tweaked view taken from Flask-Babel-JS that returns the messages and
with the A_() function instead of _().
:return: The response.
"""
js = [
""""use strict";
(function() {
var babel = {};
babel.catalog = """
]
translations = domain.get_translations()
# Here used to be an isinstance check for NullTranslations, but the
# translation object that is "merged" by flask-babel is seen as an
# instance of NullTranslations.
catalog = translations._catalog.copy()
# copy()ing the catalog here because we're modifying the original copy.
for key, value in catalog.copy().items():
if isinstance(key, tuple):
text, plural = key
if text not in catalog:
catalog[text] = {}
catalog[text][plural] = value
del catalog[key]
js.append(json.dumps(catalog, indent=4))
js.append(";\n")
js.append(JAVASCRIPT)
metadata = translations.gettext("")
if metadata:
for m in metadata.splitlines():
if m.lower().startswith("plural-forms:"):
js.append(" babel.plural = ")
js.append(c2js(m.lower().split("plural=")[1].rstrip(';')))
js.append("""
window.A_ = babel.gettext;
})();
""")
resp = Response("".join(js))
resp.headers["Content-Type"] = "text/javascript"
return resp
def init_app(app: Flask, bp: Blueprint) -> None:
"""Initializes the application.
:param app: The Flask application.
:param bp: The blueprint of the accounting application.
:return: None.
"""
bp.add_url_rule("/_jstrans.js", "babel_catalog",
__babel_js_catalog_view)
app.jinja_env.globals["A_"] = domain.gettext