forked from hesabix/arc
84 lines
2.4 KiB
Python
Executable file
84 lines
2.4 KiB
Python
Executable file
from __future__ import annotations
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from typing import Any, Callable
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from fastapi import Request
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from .i18n_catalog import get_gettext_translation
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SUPPORTED_LOCALES: tuple[str, ...] = ("fa", "en")
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DEFAULT_LOCALE: str = "en"
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def apply_format(template: str, **kwargs: Any) -> str:
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"""
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جایگزینی متغیرها در رشتهٔ ترجمهشده. ابتدا str.format؛ در خطا (مثلاً براکت اضافی در متن)
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یا ناسازگاری placeholder، با replace برای هر کلید.
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"""
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if not kwargs:
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return template
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try:
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return template.format(**kwargs)
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except (KeyError, ValueError, IndexError):
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out = template
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for k, v in kwargs.items():
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out = out.replace("{" + k + "}", str(v))
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return out
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def negotiate_locale(accept_language: str | None) -> str:
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if not accept_language:
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return DEFAULT_LOCALE
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parts = [p.strip() for p in accept_language.split(",") if p.strip()]
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for part in parts:
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lang = part.split(";")[0].strip().lower()
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base = lang.split("-")[0]
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if lang in SUPPORTED_LOCALES:
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return lang
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if base in SUPPORTED_LOCALES:
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return base
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return DEFAULT_LOCALE
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class Translator:
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def __init__(self, locale: str) -> None:
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self.locale = locale if locale in SUPPORTED_LOCALES else DEFAULT_LOCALE
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self._gt = get_gettext_translation(self.locale)
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def t(self, key: str, default: str | None = None) -> str:
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"""Translate a key using gettext. Falls back to default or key if not found."""
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try:
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if self._gt is not None:
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msg = self._gt.gettext(key)
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if msg and msg != key:
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return msg
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except Exception:
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pass
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return default or key
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async def locale_dependency(request: Request) -> Translator:
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lang = negotiate_locale(request.headers.get("Accept-Language"))
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return Translator(lang)
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def get_request_translator(request: Request) -> Translator:
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"""همان مترجمی که میدلور و get_current_user روی request.state گذاشتهاند (با fallback منطقی)."""
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t = getattr(request.state, "translator", None)
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if t is not None:
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return t
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lang = negotiate_locale(request.headers.get("Accept-Language"))
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return Translator(lang)
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def get_translator(locale: str = "fa") -> Translator:
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"""Get translator for the given locale"""
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return Translator(locale)
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def gettext(key: str, locale: str = "fa") -> str:
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"""Get translation for a key using gettext"""
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translator = get_translator(locale)
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return translator.t(key)
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