Implement Monlet MVP stack and UI updates

server/monlet_server/settings.py

@@ -0,0 +1,80 @@
+from pydantic import field_validator
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_prefix="MONLET_", env_file=".env", extra="ignore")
+
+    auth_token: str
+    database_url: str = "postgresql+asyncpg://monlet:monlet@127.0.0.1:5432/monlet"
+    log_level: str = "INFO"
+    body_limit_bytes: int = 1_048_576
+    output_max_bytes: int = 8192
+    max_batch_events: int = 200
+    stale_after_sec: int = 90
+    dead_after_sec: int = 300
+    detector_tick_sec: int = 15
+    host: str = "0.0.0.0"
+    port: int = 8000
+    enable_detector: bool = True
+    enable_notifier_worker: bool = True
+    events_retention_max_rows: int = 100_000
+    outbox_retention_max_rows: int = 50_000
+    notifier_tick_sec: int = 5
+    notifier_batch_size: int = 20
+    notifier_max_attempts: int = 8
+    notifier_lease_sec: int = 300
+    notifier_http_timeout_sec: float = 10.0
+
+    notifier_debug_enabled: bool = True
+    notifier_telegram_enabled: bool = False
+    notifier_telegram_token: str = ""
+    notifier_telegram_chat_id: str = ""
+    notifier_webhook_enabled: bool = False
+    notifier_webhook_url: str = ""
+    notifier_webhook_token: str = ""
+    notifier_alertmanager_enabled: bool = False
+    notifier_alertmanager_url: str = ""
+
+    @field_validator("auth_token")
+    @classmethod
+    def _validate_auth_token(cls, value: str) -> str:
+        if not value or value == "changeme":
+            raise ValueError("MONLET_AUTH_TOKEN must be set to a non-default value")
+        return value
+
+    @property
+    def enabled_notifiers(self) -> list[str]:
+        out: list[str] = []
+        if self.notifier_debug_enabled:
+            out.append("debug")
+        if (
+            self.notifier_telegram_enabled
+            and self.notifier_telegram_token
+            and self.notifier_telegram_chat_id
+        ):
+            out.append("telegram")
+        if self.notifier_webhook_enabled and self.notifier_webhook_url:
+            out.append("webhook")
+        if self.notifier_alertmanager_enabled and self.notifier_alertmanager_url:
+            out.append("alertmanager")
+        return out
+
+    @property
+    def sync_database_url(self) -> str:
+        return self.database_url.replace("+asyncpg", "+psycopg")
+
+
+_settings: Settings | None = None
+
+
+def get_settings() -> Settings:
+    global _settings
+    if _settings is None:
+        _settings = Settings()
+    return _settings
+
+
+def reset_settings_cache() -> None:
+    global _settings
+    _settings = None