Add monitoring PF service

app/config.py

@@ -0,0 +1,49 @@
+from pathlib import Path
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+DATA_DIR = BASE_DIR / "data"
+DATA_DIR.mkdir(exist_ok=True)
+
+
+def _resolve_sqlite_url(url: str) -> str:
+    """SQLAlchemy SQLite URL with a relative path is interpreted against CWD,
+    which breaks when the app is started from any directory other than the
+    project root. Anchor relative SQLite paths to BASE_DIR."""
+    prefix = "sqlite:///"
+    if not url.startswith(prefix):
+        return url
+    path_part = url[len(prefix):]
+    p = Path(path_part)
+    if p.is_absolute():
+        return url
+    resolved = (BASE_DIR / p).resolve()
+    resolved.parent.mkdir(parents=True, exist_ok=True)
+    return f"{prefix}{resolved}"
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=BASE_DIR / ".env",
+        env_file_encoding="utf-8",
+        extra="ignore",
+    )
+
+    tg_bot_token: str = ""
+    web_host: str = "127.0.0.1"
+    web_port: int = 8000
+    public_base_path: str = ""
+    scrape_interval_hours: int = 4
+    database_url: str = f"sqlite:///{DATA_DIR / 'monitor.db'}"
+    admin_chat_id: str = ""
+    # Shared PIN that unlocks destructive web actions (delete/edit). Empty = gate
+    # disabled (everything allowed). See app/auth.py.
+    admin_pin: str = ""
+
+    def model_post_init(self, __context) -> None:
+        self.database_url = _resolve_sqlite_url(self.database_url)
+
+
+settings = Settings()