71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
"""
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Tiny user-preferences store — JSON file in DATA_DIR.
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Keeps UI-selected choices (engine picks, translator provider, …) across
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process restarts without reaching for a DB table. Environment variables
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still win — users who set `OMNIVOICE_TTS_BACKEND=…` are opting into an
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explicit override that the UI cannot silently undo.
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resolve("tts_backend", env="OMNIVOICE_TTS_BACKEND", default="omnivoice")
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→ env var if set, else prefs.json value, else default.
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"""
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from __future__ import annotations
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import json
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import logging
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import os
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import tempfile
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from typing import Any, Optional
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from core.config import DATA_DIR
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logger = logging.getLogger("omnivoice.prefs")
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_PREFS_PATH = os.path.join(DATA_DIR, "prefs.json")
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def _load() -> dict:
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try:
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with open(_PREFS_PATH, "r", encoding="utf-8") as f:
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return json.load(f) or {}
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except (FileNotFoundError, json.JSONDecodeError):
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return {}
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except Exception as e:
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logger.warning("prefs.json unreadable (%s); treating as empty", e)
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return {}
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def _save(data: dict) -> None:
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# Atomic write — no half-written JSON if the process dies mid-flush.
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fd, tmp = tempfile.mkstemp(prefix=".prefs.", suffix=".tmp", dir=DATA_DIR)
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try:
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with os.fdopen(fd, "w", encoding="utf-8") as f:
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json.dump(data, f, indent=2)
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os.replace(tmp, _PREFS_PATH)
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except Exception:
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try:
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os.unlink(tmp)
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except OSError:
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pass
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raise
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def get(key: str, default: Any = None) -> Any:
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return _load().get(key, default)
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def set_(key: str, value: Any) -> None:
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data = _load()
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data[key] = value
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_save(data)
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def resolve(key: str, *, env: Optional[str] = None, default: Any = None) -> Any:
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"""Env var > prefs.json > default. Env is authoritative so power-users
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can pin a backend without the UI silently changing it."""
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if env:
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v = os.environ.get(env)
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if v:
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return v
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return get(key, default)
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