canaille-globuzma/canaille/app/i18n.py

70 lines
1.7 KiB
Python

import gettext
import pytz
from babel.dates import LOCALTZ
from flask import current_app
from flask import g
from flask import request
from flask_babel import Babel
from flask_babel import get_locale
DEFAULT_LANGUAGE_CODE = "en"
babel = Babel()
def setup_i18n(app):
babel.init_app(
app, locale_selector=locale_selector, timezone_selector=timezone_selector
)
@app.before_request
def before_request():
g.available_language_codes = available_language_codes()
@app.context_processor
def global_processor():
return {
"locale": get_locale(),
}
def locale_selector():
from .flask import current_user
user = current_user()
available_language_codes = getattr(g, "available_language_codes", [])
if user is not None and user.preferred_language in available_language_codes:
return user.preferred_language
if current_app.config.get("LANGUAGE"):
return current_app.config.get("LANGUAGE")
return request.accept_languages.best_match(available_language_codes)
def timezone_selector():
try:
return pytz.timezone(current_app.config.get("TIMEZONE"))
except pytz.exceptions.UnknownTimeZoneError:
return LOCALTZ
def native_language_name_from_code(code):
try:
import pycountry
except ImportError: # pragma: no cover
return code
language = pycountry.languages.get(alpha_2=code[:2])
if code == DEFAULT_LANGUAGE_CODE:
return language.name
translation = gettext.translation(
"iso639-3", pycountry.LOCALES_DIR, languages=[code]
)
return translation.gettext(language.name)
def available_language_codes():
return [str(translation) for translation in babel.list_translations()]