Make notifications toggleable via MQTT (#13657)

* Add ability to toggle mqtt state from MQTT / ws

* Listen to notification config updates

* Add docs for notifications

docs/docs/integrations/mqtt.md

@@ -154,6 +154,14 @@ Message published for each changed review item. The first message is published w
 
 Same data available at `/api/stats` published at a configurable interval.
 
+### `frigate/notifications/set`
+
+Topic to turn notifications on and off. Expected values are `ON` and `OFF`.
+
+### `frigate/notifications/state`
+
+Topic with current state of notifications. Published values are `ON` and `OFF`.
+
 ## Frigate Camera Topics
 
 ### `frigate/<camera_name>/<object_name>`

frigate/app.py

@@ -406,7 +406,7 @@ class FrigateApp:
         if self.config.mqtt.enabled:
             comms.append(MqttClient(self.config))
 
-        if self.config.notifications.enabled:
+        if self.config.notifications.enabled_in_config:
             comms.append(WebPushClient(self.config))
 
         comms.append(WebSocketClient(self.config))

frigate/comms/dispatcher.py

@@ -75,6 +75,9 @@ class Dispatcher:
             "birdseye": self._on_birdseye_command,
             "birdseye_mode": self._on_birdseye_mode_command,
         }
+        self._global_settings_handlers: dict[str, Callable] = {
+            "notifications": self._on_notification_command,
+        }
 
         for comm in self.comms:
             comm.subscribe(self._receive)
@@ -86,9 +89,13 @@ class Dispatcher:
         if topic.endswith("set"):
             try:
                 # example /cam_name/detect/set payload=ON|OFF
-                camera_name = topic.split("/")[-3]
-                command = topic.split("/")[-2]
-                self._camera_settings_handlers[command](camera_name, payload)
+                if topic.count("/") == 2:
+                    camera_name = topic.split("/")[-3]
+                    command = topic.split("/")[-2]
+                    self._camera_settings_handlers[command](camera_name, payload)
+                elif topic.count("/") == 1:
+                    command = topic.split("/")[-2]
+                    self._global_settings_handlers[command](payload)
             except IndexError:
                 logger.error(f"Received invalid set command: {topic}")
                 return
@@ -282,6 +289,18 @@ class Dispatcher:
         self.config_updater.publish(f"config/motion/{camera_name}", motion_settings)
         self.publish(f"{camera_name}/motion_threshold/state", payload, retain=True)
 
+    def _on_notification_command(self, payload: str) -> None:
+        """Callback for notification topic."""
+        if payload != "ON" and payload != "OFF":
+            f"Received unsupported value for notification: {payload}"
+            return
+
+        notification_settings = self.config.notifications
+        logger.info(f"Setting notifications: {payload}")
+        notification_settings.enabled = payload == "ON"  # type: ignore[union-attr]
+        self.config_updater.publish("config/notifications", notification_settings)
+        self.publish("notifications/state", payload, retain=True)
+
     def _on_audio_command(self, camera_name: str, payload: str) -> None:
         """Callback for audio topic."""
         audio_settings = self.config.cameras[camera_name].audio

frigate/comms/mqtt.py

@@ -105,6 +105,13 @@ class MqttClient(Communicator):  # type: ignore[misc]
                 retain=True,
             )
 
+        if self.config.notifications.enabled_in_config:
+            self.publish(
+                "notifications/state",
+                "ON" if self.config.notifications.enabled else "OFF",
+                retain=True,
+            )
+
         self.publish("available", "online", retain=True)
 
     def on_mqtt_command(
@@ -209,6 +216,12 @@ class MqttClient(Communicator):  # type: ignore[misc]
                     self.on_mqtt_command,
                 )
 
+        if self.config.notifications.enabled_in_config:
+            self.client.message_callback_add(
+                f"{self.mqtt_config.topic_prefix}/notifications/set",
+                self.on_mqtt_command,
+            )
+
         self.client.message_callback_add(
             f"{self.mqtt_config.topic_prefix}/restart", self.on_mqtt_command
         )

frigate/comms/webpush.py

@@ -9,6 +9,7 @@ from typing import Any, Callable
 from py_vapid import Vapid01
 from pywebpush import WebPusher
 
+from frigate.comms.config_updater import ConfigSubscriber
 from frigate.comms.dispatcher import Communicator
 from frigate.config import FrigateConfig
 from frigate.const import CONFIG_DIR
@@ -41,6 +42,9 @@ class WebPushClient(Communicator):  # type: ignore[misc]
             for sub in user["notification_tokens"]:
                 self.web_pushers[user["username"]].append(WebPusher(sub))
 
+        # notification config updater
+        self.config_subscriber = ConfigSubscriber("config/notifications")
+
     def subscribe(self, receiver: Callable) -> None:
         """Wrapper for allowing dispatcher to subscribe."""
         pass
@@ -101,6 +105,15 @@ class WebPushClient(Communicator):  # type: ignore[misc]
 
     def publish(self, topic: str, payload: Any, retain: bool = False) -> None:
         """Wrapper for publishing when client is in valid state."""
+        # check for updated notification config
+        _, updated_notif_config = self.config_subscriber.check_for_update()
+
+        if updated_notif_config:
+            self.config.notifications = updated_notif_config
+
+        if not self.config.notifications.enabled:
+            return
+
         if topic == "reviews":
             self.send_alert(json.loads(payload))
 

frigate/config.py

@@ -172,6 +172,9 @@ class AuthConfig(FrigateBaseModel):
 class NotificationConfig(FrigateBaseModel):
     enabled: bool = Field(default=False, title="Enable notifications")
     email: Optional[str] = Field(default=None, title="Email required for push.")
+    enabled_in_config: Optional[bool] = Field(
+        default=None, title="Keep track of original state of notifications."
+    )
 
 
 class StatsConfig(FrigateBaseModel):
@@ -1459,6 +1462,9 @@ class FrigateConfig(FrigateBaseModel):
             config.mqtt.user = config.mqtt.user.format(**FRIGATE_ENV_VARS)
             config.mqtt.password = config.mqtt.password.format(**FRIGATE_ENV_VARS)
 
+        # set notifications state
+        config.notifications.enabled_in_config = config.notifications.enabled
+
         # GenAI substitution
         if config.genai.api_key:
             config.genai.api_key = config.genai.api_key.format(**FRIGATE_ENV_VARS)