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46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
from pathlib import Path
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import json
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from typing import Dict, Optional
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from fastapi import Request
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class I18n:
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def __init__(self, locale_dir: str = "locales"):
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self.locale_dir = Path(locale_dir)
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self.translations: Dict[str, Dict[str, str]] = {}
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self.load_translations()
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def load_translations(self):
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if not self.locale_dir.exists():
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self.locale_dir.mkdir()
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return
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for lang_file in self.locale_dir.glob("*.json"):
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with open(lang_file, 'r', encoding='utf-8') as f:
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self.translations[lang_file.stem.lower()] = json.load(f)
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def get_language(self, request: Request) -> str:
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accept_language = request.headers.get('accept-language', 'en')
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primary_lang = accept_language.split(',')[0].lower()
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return primary_lang if primary_lang in self.translations else 'zh-cn'
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def __call__(self, request: Request) -> 'I18nHelper':
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return I18nHelper(self, request)
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class I18nHelper:
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def __init__(self, i18n: I18n, request: Request):
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self.i18n = i18n
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self.request = request
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self.lang = i18n.get_language(request)
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def __call__(self, key: str, **kwargs) -> str:
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lang_data = self.i18n.translations.get(self.lang, {})
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text = lang_data.get(key, key) # 找不到则返回原key
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if kwargs:
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try:
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return text.format(**kwargs)
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except (KeyError, ValueError):
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return text
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return text |