52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
import json
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from pathlib import Path
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from functools import lru_cache
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from typing import Any, Dict
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FALLBACK_LANG = "ru"
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@lru_cache(maxsize=16)
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def _load_lang(lang: str) -> Dict[str, Any]:
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base_dir = Path(__file__).resolve().parents[1] / "locales"
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file_path = base_dir / f"{lang}.json"
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if not file_path.exists():
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# fallback to default
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if lang != FALLBACK_LANG:
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return _load_lang(FALLBACK_LANG)
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return {}
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try:
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return json.loads(file_path.read_text(encoding="utf-8"))
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except Exception:
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return {}
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def _resolve_key(data: Dict[str, Any], dotted_key: str) -> Any:
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cur: Any = data
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for part in dotted_key.split("."):
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if not isinstance(cur, dict) or part not in cur:
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return None
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cur = cur[part]
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return cur
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def t(lang: str, key: str, **kwargs) -> str:
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"""Translate key for given lang; fallback to ru and to key itself.
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Supports dotted keys and str.format(**kwargs) placeholders.
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"""
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data = _load_lang(lang or FALLBACK_LANG)
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value = _resolve_key(data, key)
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if value is None and lang != FALLBACK_LANG:
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value = _resolve_key(_load_lang(FALLBACK_LANG), key)
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if value is None:
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value = key # last resort: return the key
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try:
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if isinstance(value, str) and kwargs:
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return value.format(**kwargs)
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except Exception:
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pass
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return value if isinstance(value, str) else str(value)
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