Christian Krakau-Louis
52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
import gettext
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import os
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from fastapi import Request
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from babel.support import Translations
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from functools import lru_cache
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DEFAULT_LANGUAGE = 'de' # Default is German
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# Path to translations
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LOCALE_DIR = os.path.join(os.path.dirname(__file__), 'locales')
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@lru_cache(maxsize=None)
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def get_translation(lang_code: str) -> gettext.NullTranslations:
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"""
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Load and cache translations for the given language
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"""
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translations = gettext.translation(
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'messages',
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localedir=LOCALE_DIR,
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languages=[lang_code],
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fallback=True
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)
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return translations
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def get_locale_from_request(request: Request) -> str:
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"""
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Determine the best language based on:
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1. URL parameter (e.g., '?lang=de')
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2. User session
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3. Accept-Language header
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4. Default language
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"""
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# Check URL parameter
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lang_param = request.query_params.get('lang')
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if lang_param:
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return lang_param
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# Check session
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session = request.session.get('language')
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if session:
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return session
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# Check Accept-Language header
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accept_language = request.headers.get('accept-language', '')
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if accept_language:
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for lang in accept_language.split(','):
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lang_code = lang.split(';')[0].strip().lower()
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lang_code = lang_code.split('-')[0] # Convert 'en-US' to 'en'
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return lang_code
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return DEFAULT_LANGUAGE
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