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https://github.com/zulip/zulip.git
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476a217087
This commit adds get_browser_language_code function which returns None if there is no Accept-language header in the request or Accept-languge header contains only unsupported languages or all languages (meaning header having value of '*'). Otherwise it returns the language with highest weight/quality-value.
85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
# See https://zulip.readthedocs.io/en/latest/translating/internationalization.html
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import logging
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import os
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from functools import lru_cache
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from typing import Any, Dict, List, Optional
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import orjson
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from django.conf import settings
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from django.http import HttpRequest
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from django.utils import translation
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from django.utils.translation.trans_real import parse_accept_lang_header
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from zerver.lib.request import RequestNotes
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@lru_cache(None)
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def get_language_list() -> List[Dict[str, Any]]:
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path = os.path.join(settings.DEPLOY_ROOT, "locale", "language_name_map.json")
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with open(path, "rb") as reader:
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languages = orjson.loads(reader.read())
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return languages["name_map"]
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def get_language_name(code: str) -> str:
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for lang in get_language_list():
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if code in (lang["code"], lang["locale"]):
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return lang["name"]
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# Log problem, but still return a name
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logging.error("Unknown language code '%s'", code)
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return "Unknown"
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def get_available_language_codes() -> List[str]:
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language_list = get_language_list()
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codes = [language["code"] for language in language_list]
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return codes
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def get_language_translation_data(language: str) -> Dict[str, str]:
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if language == "en":
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return {}
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locale = translation.to_locale(language)
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path = os.path.join(settings.DEPLOY_ROOT, "locale", locale, "translations.json")
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try:
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with open(path, "rb") as reader:
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return orjson.loads(reader.read())
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except FileNotFoundError:
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print(f"Translation for {language} not found at {path}")
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return {}
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def get_and_set_request_language(
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request: HttpRequest, user_configured_language: str, testing_url_language: Optional[str] = None
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) -> str:
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# We pick a language for the user as follows:
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# * First priority is the language in the URL, for debugging.
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# * If not in the URL, we use the language from the user's settings.
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request_language = testing_url_language
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if request_language is None:
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request_language = user_configured_language
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translation.activate(request_language)
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# We also want to save the language to the user's cookies, so that
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# something reasonable will happen in logged-in portico pages.
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# We accomplish that by setting a flag on the request which signals
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# to LocaleMiddleware to set the cookie on the response.
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RequestNotes.get_notes(request).set_language = translation.get_language()
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return request_language
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def get_browser_language_code(request: HttpRequest) -> Optional[str]:
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accept_lang_header = request.META.get("HTTP_ACCEPT_LANGUAGE")
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if accept_lang_header is None:
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return None
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available_language_codes = get_available_language_codes()
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for accept_lang, priority in parse_accept_lang_header(request.META.get("HTTP_ACCEPT_LANGUAGE")):
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if accept_lang == "*":
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return None
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if accept_lang in available_language_codes:
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return accept_lang
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return None
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