blakeblackshear.frigate/frigate/comms/dispatcher.py

"""Handle communication between Frigate and other applications."""

import datetime
import json
import logging
from abc import ABC, abstractmethod
from typing import Any, Callable, Optional

from frigate.camera import PTZMetrics
from frigate.comms.config_updater import ConfigPublisher
from frigate.config import BirdseyeModeEnum, FrigateConfig
from frigate.const import (
    CLEAR_ONGOING_REVIEW_SEGMENTS,
    INSERT_MANY_RECORDINGS,
    INSERT_PREVIEW,
    REQUEST_REGION_GRID,
    UPDATE_CAMERA_ACTIVITY,
    UPDATE_EMBEDDINGS_REINDEX_PROGRESS,
    UPDATE_EVENT_DESCRIPTION,
    UPDATE_MODEL_STATE,
    UPSERT_REVIEW_SEGMENT,
)
from frigate.models import Event, Previews, Recordings, ReviewSegment
from frigate.ptz.onvif import OnvifCommandEnum, OnvifController
from frigate.types import ModelStatusTypesEnum
from frigate.util.object import get_camera_regions_grid
from frigate.util.services import restart_frigate

logger = logging.getLogger(__name__)


class Communicator(ABC):
    """pub/sub model via specific protocol."""

    @abstractmethod
    def publish(self, topic: str, payload: Any, retain: bool = False) -> None:
        """Send data via specific protocol."""
        pass

    @abstractmethod
    def subscribe(self, receiver: Callable) -> None:
        """Pass receiver so communicators can pass commands."""
        pass

    @abstractmethod
    def stop(self) -> None:
        """Stop the communicator."""
        pass


class Dispatcher:
    """Handle communication between Frigate and communicators."""

    def __init__(
        self,
        config: FrigateConfig,
        config_updater: ConfigPublisher,
        onvif: OnvifController,
        ptz_metrics: dict[str, PTZMetrics],
        communicators: list[Communicator],
    ) -> None:
        self.config = config
        self.config_updater = config_updater
        self.onvif = onvif
        self.ptz_metrics = ptz_metrics
        self.comms = communicators
        self.camera_activity = {}
        self.model_state = {}
        self.embeddings_reindex = {}

        self._camera_settings_handlers: dict[str, Callable] = {
            "audio": self._on_audio_command,
            "detect": self._on_detect_command,
            "improve_contrast": self._on_motion_improve_contrast_command,
            "ptz_autotracker": self._on_ptz_autotracker_command,
            "motion": self._on_motion_command,
            "motion_contour_area": self._on_motion_contour_area_command,
            "motion_threshold": self._on_motion_threshold_command,
            "recordings": self._on_recordings_command,
            "snapshots": self._on_snapshots_command,
            "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)

    def _receive(self, topic: str, payload: str) -> Optional[Any]:
        """Handle receiving of payload from communicators."""

        def handle_camera_command(command_type, camera_name, command, payload):
            try:
                if command_type == "set":
                    self._camera_settings_handlers[command](camera_name, payload)
                elif command_type == "ptz":
                    self._on_ptz_command(camera_name, payload)
            except KeyError:
                logger.error(f"Invalid command type or handler: {command_type}")

        def handle_restart():
            restart_frigate()

        def handle_insert_many_recordings():
            Recordings.insert_many(payload).execute()

        def handle_request_region_grid():
            camera = payload
            grid = get_camera_regions_grid(
                camera,
                self.config.cameras[camera].detect,
                max(self.config.model.width, self.config.model.height),
            )
            return grid

        def handle_insert_preview():
            Previews.insert(payload).execute()

        def handle_upsert_review_segment():
            ReviewSegment.insert(payload).on_conflict(
                conflict_target=[ReviewSegment.id],
                update=payload,
            ).execute()

        def handle_clear_ongoing_review_segments():
            ReviewSegment.update(end_time=datetime.datetime.now().timestamp()).where(
                ReviewSegment.end_time.is_null(True)
            ).execute()

        def handle_update_camera_activity():
            self.camera_activity = payload

        def handle_update_event_description():
            event: Event = Event.get(Event.id == payload["id"])
            event.data["description"] = payload["description"]
            event.save()
            self.publish(
                "event_update",
                json.dumps({"id": event.id, "description": event.data["description"]}),
            )

        def handle_update_model_state():
            if payload:
                model = payload["model"]
                state = payload["state"]
                self.model_state[model] = ModelStatusTypesEnum[state]
                self.publish("model_state", json.dumps(self.model_state))

        def handle_model_state():
            self.publish("model_state", json.dumps(self.model_state.copy()))

        def handle_update_embeddings_reindex_progress():
            self.embeddings_reindex = payload
            self.publish(
                "embeddings_reindex_progress",
                json.dumps(payload),
            )

        def handle_embeddings_reindex_progress():
            self.publish(
                "embeddings_reindex_progress",
                json.dumps(self.embeddings_reindex.copy()),
            )

        def handle_on_connect():
            camera_status = self.camera_activity.copy()

            for camera in camera_status.keys():
                camera_status[camera]["config"] = {
                    "detect": self.config.cameras[camera].detect.enabled,
                    "snapshots": self.config.cameras[camera].snapshots.enabled,
                    "record": self.config.cameras[camera].record.enabled,
                    "audio": self.config.cameras[camera].audio.enabled,
                    "autotracking": self.config.cameras[
                        camera
                    ].onvif.autotracking.enabled,
                }

            self.publish("camera_activity", json.dumps(camera_status))

        # Dictionary mapping topic to handlers
        topic_handlers = {
            INSERT_MANY_RECORDINGS: handle_insert_many_recordings,
            REQUEST_REGION_GRID: handle_request_region_grid,
            INSERT_PREVIEW: handle_insert_preview,
            UPSERT_REVIEW_SEGMENT: handle_upsert_review_segment,
            CLEAR_ONGOING_REVIEW_SEGMENTS: handle_clear_ongoing_review_segments,
            UPDATE_CAMERA_ACTIVITY: handle_update_camera_activity,
            UPDATE_EVENT_DESCRIPTION: handle_update_event_description,
            UPDATE_MODEL_STATE: handle_update_model_state,
            UPDATE_EMBEDDINGS_REINDEX_PROGRESS: handle_update_embeddings_reindex_progress,
            "restart": handle_restart,
            "embeddingsReindexProgress": handle_embeddings_reindex_progress,
            "modelState": handle_model_state,
            "onConnect": handle_on_connect,
        }

        if topic.endswith("set") or topic.endswith("ptz"):
            try:
                parts = topic.split("/")
                if len(parts) == 3 and topic.endswith("set"):
                    # example /cam_name/detect/set payload=ON|OFF
                    camera_name = parts[-3]
                    command = parts[-2]
                    handle_camera_command("set", camera_name, command, payload)
                elif len(parts) == 2 and topic.endswith("set"):
                    command = parts[-2]
                    self._global_settings_handlers[command](payload)
                elif len(parts) == 2 and topic.endswith("ptz"):
                    # example /cam_name/ptz payload=MOVE_UP|MOVE_DOWN|STOP...
                    camera_name = parts[-2]
                    handle_camera_command("ptz", camera_name, "", payload)
            except IndexError:
                logger.error(
                    f"Received invalid {topic.split('/')[-1]} command: {topic}"
                )
                return
        elif topic in topic_handlers:
            return topic_handlers[topic]()
        else:
            self.publish(topic, payload, retain=False)

    def publish(self, topic: str, payload: Any, retain: bool = False) -> None:
        """Handle publishing to communicators."""
        for comm in self.comms:
            comm.publish(topic, payload, retain)

    def stop(self) -> None:
        for comm in self.comms:
            comm.stop()

    def _on_detect_command(self, camera_name: str, payload: str) -> None:
        """Callback for detect topic."""
        detect_settings = self.config.cameras[camera_name].detect
        motion_settings = self.config.cameras[camera_name].motion

        if payload == "ON":
            if not detect_settings.enabled:
                logger.info(f"Turning on detection for {camera_name}")
                detect_settings.enabled = True

                if not motion_settings.enabled:
                    logger.info(
                        f"Turning on motion for {camera_name} due to detection being enabled."
                    )
                    motion_settings.enabled = True
                    self.config_updater.publish(
                        f"config/motion/{camera_name}", motion_settings
                    )
                    self.publish(f"{camera_name}/motion/state", payload, retain=True)
        elif payload == "OFF":
            if detect_settings.enabled:
                logger.info(f"Turning off detection for {camera_name}")
                detect_settings.enabled = False

        self.config_updater.publish(f"config/detect/{camera_name}", detect_settings)
        self.publish(f"{camera_name}/detect/state", payload, retain=True)

    def _on_motion_command(self, camera_name: str, payload: str) -> None:
        """Callback for motion topic."""
        detect_settings = self.config.cameras[camera_name].detect
        motion_settings = self.config.cameras[camera_name].motion

        if payload == "ON":
            if not motion_settings.enabled:
                logger.info(f"Turning on motion for {camera_name}")
                motion_settings.enabled = True
        elif payload == "OFF":
            if detect_settings.enabled:
                logger.error(
                    "Turning off motion is not allowed when detection is enabled."
                )
                return

            if motion_settings.enabled:
                logger.info(f"Turning off motion for {camera_name}")
                motion_settings.enabled = False

        self.config_updater.publish(f"config/motion/{camera_name}", motion_settings)
        self.publish(f"{camera_name}/motion/state", payload, retain=True)

    def _on_motion_improve_contrast_command(
        self, camera_name: str, payload: str
    ) -> None:
        """Callback for improve_contrast topic."""
        motion_settings = self.config.cameras[camera_name].motion

        if payload == "ON":
            if not motion_settings.improve_contrast:
                logger.info(f"Turning on improve contrast for {camera_name}")
                motion_settings.improve_contrast = True  # type: ignore[union-attr]
        elif payload == "OFF":
            if motion_settings.improve_contrast:
                logger.info(f"Turning off improve contrast for {camera_name}")
                motion_settings.improve_contrast = False  # type: ignore[union-attr]

        self.config_updater.publish(f"config/motion/{camera_name}", motion_settings)
        self.publish(f"{camera_name}/improve_contrast/state", payload, retain=True)

    def _on_ptz_autotracker_command(self, camera_name: str, payload: str) -> None:
        """Callback for ptz_autotracker topic."""
        ptz_autotracker_settings = self.config.cameras[camera_name].onvif.autotracking

        if payload == "ON":
            if not self.config.cameras[
                camera_name
            ].onvif.autotracking.enabled_in_config:
                logger.error(
                    "Autotracking must be enabled in the config to be turned on via MQTT."
                )
                return
            if not self.ptz_metrics[camera_name].autotracker_enabled.value:
                logger.info(f"Turning on ptz autotracker for {camera_name}")
                self.ptz_metrics[camera_name].autotracker_enabled.value = True
                self.ptz_metrics[camera_name].start_time.value = 0
                ptz_autotracker_settings.enabled = True
        elif payload == "OFF":
            if self.ptz_metrics[camera_name].autotracker_enabled.value:
                logger.info(f"Turning off ptz autotracker for {camera_name}")
                self.ptz_metrics[camera_name].autotracker_enabled.value = False
                self.ptz_metrics[camera_name].start_time.value = 0
                ptz_autotracker_settings.enabled = False

        self.publish(f"{camera_name}/ptz_autotracker/state", payload, retain=True)

    def _on_motion_contour_area_command(self, camera_name: str, payload: int) -> None:
        """Callback for motion contour topic."""
        try:
            payload = int(payload)
        except ValueError:
            f"Received unsupported value for motion contour area: {payload}"
            return

        motion_settings = self.config.cameras[camera_name].motion
        logger.info(f"Setting motion contour area for {camera_name}: {payload}")
        motion_settings.contour_area = payload  # type: ignore[union-attr]
        self.config_updater.publish(f"config/motion/{camera_name}", motion_settings)
        self.publish(f"{camera_name}/motion_contour_area/state", payload, retain=True)

    def _on_motion_threshold_command(self, camera_name: str, payload: int) -> None:
        """Callback for motion threshold topic."""
        try:
            payload = int(payload)
        except ValueError:
            f"Received unsupported value for motion threshold: {payload}"
            return

        motion_settings = self.config.cameras[camera_name].motion
        logger.info(f"Setting motion threshold for {camera_name}: {payload}")
        motion_settings.threshold = payload  # type: ignore[union-attr]
        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

        if payload == "ON":
            if not self.config.cameras[camera_name].audio.enabled_in_config:
                logger.error(
                    "Audio detection must be enabled in the config to be turned on via MQTT."
                )
                return

            if not audio_settings.enabled:
                logger.info(f"Turning on audio detection for {camera_name}")
                audio_settings.enabled = True
        elif payload == "OFF":
            if audio_settings.enabled:
                logger.info(f"Turning off audio detection for {camera_name}")
                audio_settings.enabled = False

        self.config_updater.publish(f"config/audio/{camera_name}", audio_settings)
        self.publish(f"{camera_name}/audio/state", payload, retain=True)

    def _on_recordings_command(self, camera_name: str, payload: str) -> None:
        """Callback for recordings topic."""
        record_settings = self.config.cameras[camera_name].record

        if payload == "ON":
            if not self.config.cameras[camera_name].record.enabled_in_config:
                logger.error(
                    "Recordings must be enabled in the config to be turned on via MQTT."
                )
                return

            if not record_settings.enabled:
                logger.info(f"Turning on recordings for {camera_name}")
                record_settings.enabled = True
        elif payload == "OFF":
            if record_settings.enabled:
                logger.info(f"Turning off recordings for {camera_name}")
                record_settings.enabled = False

        self.config_updater.publish(f"config/record/{camera_name}", record_settings)
        self.publish(f"{camera_name}/recordings/state", payload, retain=True)

    def _on_snapshots_command(self, camera_name: str, payload: str) -> None:
        """Callback for snapshots topic."""
        snapshots_settings = self.config.cameras[camera_name].snapshots

        if payload == "ON":
            if not snapshots_settings.enabled:
                logger.info(f"Turning on snapshots for {camera_name}")
                snapshots_settings.enabled = True
        elif payload == "OFF":
            if snapshots_settings.enabled:
                logger.info(f"Turning off snapshots for {camera_name}")
                snapshots_settings.enabled = False

        self.publish(f"{camera_name}/snapshots/state", payload, retain=True)

    def _on_ptz_command(self, camera_name: str, payload: str) -> None:
        """Callback for ptz topic."""
        try:
            if "preset" in payload.lower():
                command = OnvifCommandEnum.preset
                param = payload.lower()[payload.index("_") + 1 :]
            elif "move_relative" in payload.lower():
                command = OnvifCommandEnum.move_relative
                param = payload.lower()[payload.index("_") + 1 :]
            else:
                command = OnvifCommandEnum[payload.lower()]
                param = ""

            self.onvif.handle_command(camera_name, command, param)
            logger.info(f"Setting ptz command to {command} for {camera_name}")
        except KeyError as k:
            logger.error(f"Invalid PTZ command {payload}: {k}")

    def _on_birdseye_command(self, camera_name: str, payload: str) -> None:
        """Callback for birdseye topic."""
        birdseye_settings = self.config.cameras[camera_name].birdseye

        if payload == "ON":
            if not birdseye_settings.enabled:
                logger.info(f"Turning on birdseye for {camera_name}")
                birdseye_settings.enabled = True

        elif payload == "OFF":
            if birdseye_settings.enabled:
                logger.info(f"Turning off birdseye for {camera_name}")
                birdseye_settings.enabled = False

        self.config_updater.publish(f"config/birdseye/{camera_name}", birdseye_settings)
        self.publish(f"{camera_name}/birdseye/state", payload, retain=True)

    def _on_birdseye_mode_command(self, camera_name: str, payload: str) -> None:
        """Callback for birdseye mode topic."""

        if payload not in ["CONTINUOUS", "MOTION", "OBJECTS"]:
            logger.info(f"Invalid birdseye_mode command: {payload}")
            return

        birdseye_settings = self.config.cameras[camera_name].birdseye

        if not birdseye_settings.enabled:
            logger.info(f"Birdseye mode not enabled for {camera_name}")
            return

        birdseye_settings.mode = BirdseyeModeEnum(payload.lower())
        logger.info(
            f"Setting birdseye mode for {camera_name} to {birdseye_settings.mode}"
        )

        self.config_updater.publish(f"config/birdseye/{camera_name}", birdseye_settings)
        self.publish(f"{camera_name}/birdseye_mode/state", payload, retain=True)