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"""Localized prompt management for LLM prompts.
Prompts live in JSON files under ``prompts/``. The default language is read from
``config.settings.language`` and can be overridden per-call via the ``lang``
argument.
"""
from __future__ import annotations
import json
from pathlib import Path
from typing import Any, cast
from ollama_web.config import settings
_DIR = Path(__file__).resolve().parent
_PROMPTS_CACHE: dict[str, dict[str, Any]] = {}
def _load_prompts(lang: str) -> dict[str, Any]:
"""Load prompts for a language, falling back to an empty dict on error."""
path = _DIR / f"{lang}.json"
try:
with path.open("r", encoding="utf-8") as f:
return cast(dict[str, Any], json.load(f))
except (FileNotFoundError, json.JSONDecodeError):
return {}
def get_prompts(lang: str | None = None) -> dict[str, Any]:
"""Return the full prompt dictionary for the requested language."""
lang = lang or settings.language or "ja"
if lang not in _PROMPTS_CACHE:
_PROMPTS_CACHE[lang] = _load_prompts(lang)
return _PROMPTS_CACHE[lang]
def get_prompt(key: str, lang: str | None = None, fallback: str | None = None) -> str:
"""Return a localized LLM prompt string.
Args:
key: Dot-separated path, e.g. ``"tool_system"``.
lang: Optional language override. Uses ``settings.language`` when omitted.
fallback: Value returned when the key is missing. Defaults to the key itself.
Returns:
The localized prompt string, or the fallback value if missing.
"""
current: Any = get_prompts(lang)
for part in key.split("."):
if not isinstance(current, dict) or part not in current:
return fallback if fallback is not None else key
current = current[part]
if isinstance(current, str):
return current
return fallback if fallback is not None else key
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