Split config.py into multiple files (#14038)

* Replace logging.warn with logging.warning

* Install config global state early

* Split config.py into more manageable pieces

frigate/config/mqtt.py

@@ -0,0 +1,38 @@
+from typing import Optional
+
+from pydantic import Field, ValidationInfo, model_validator
+from typing_extensions import Self
+
+from frigate.const import FREQUENCY_STATS_POINTS
+
+from .base import FrigateBaseModel
+from .env import EnvString
+
+__all__ = ["MqttConfig"]
+
+
+class MqttConfig(FrigateBaseModel):
+    enabled: bool = Field(default=True, title="Enable MQTT Communication.")
+    host: str = Field(default="", title="MQTT Host")
+    port: int = Field(default=1883, title="MQTT Port")
+    topic_prefix: str = Field(default="frigate", title="MQTT Topic Prefix")
+    client_id: str = Field(default="frigate", title="MQTT Client ID")
+    stats_interval: int = Field(
+        default=60, ge=FREQUENCY_STATS_POINTS, title="MQTT Camera Stats Interval"
+    )
+    user: Optional[EnvString] = Field(default=None, title="MQTT Username")
+    password: Optional[EnvString] = Field(
+        default=None, title="MQTT Password", validate_default=True
+    )
+    tls_ca_certs: Optional[str] = Field(default=None, title="MQTT TLS CA Certificates")
+    tls_client_cert: Optional[str] = Field(
+        default=None, title="MQTT TLS Client Certificate"
+    )
+    tls_client_key: Optional[str] = Field(default=None, title="MQTT TLS Client Key")
+    tls_insecure: Optional[bool] = Field(default=None, title="MQTT TLS Insecure")
+
+    @model_validator(mode="after")
+    def user_requires_pass(self, info: ValidationInfo) -> Self:
+        if (self.user is None) != (self.password is None):
+            raise ValueError("Password must be provided with username.")
+        return self