141 lines
4.3 KiB
Python
141 lines
4.3 KiB
Python
"""Camera that loads a picture from an MQTT topic."""
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from __future__ import annotations
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from base64 import b64decode
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import functools
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import logging
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from typing import TYPE_CHECKING
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import voluptuous as vol
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from homeassistant.components import camera
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from homeassistant.components.camera import Camera
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from homeassistant.config_entries import ConfigEntry
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from homeassistant.const import CONF_NAME
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from homeassistant.core import HomeAssistant, callback
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from homeassistant.helpers import config_validation as cv
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from homeassistant.helpers.entity_platform import AddEntitiesCallback
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from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
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from . import subscription
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from .config import MQTT_BASE_SCHEMA
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from .const import CONF_QOS, CONF_TOPIC
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from .debug_info import log_messages
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from .mixins import MQTT_ENTITY_COMMON_SCHEMA, MqttEntity, async_setup_entry_helper
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from .models import ReceiveMessage
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from .util import valid_subscribe_topic
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_LOGGER = logging.getLogger(__name__)
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CONF_IMAGE_ENCODING = "image_encoding"
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DEFAULT_NAME = "MQTT Camera"
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MQTT_CAMERA_ATTRIBUTES_BLOCKED = frozenset(
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{
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"access_token",
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"brand",
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"model_name",
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"motion_detection",
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}
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)
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PLATFORM_SCHEMA_BASE = MQTT_BASE_SCHEMA.extend(
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{
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vol.Optional(CONF_NAME): vol.Any(cv.string, None),
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vol.Required(CONF_TOPIC): valid_subscribe_topic,
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vol.Optional(CONF_IMAGE_ENCODING): "b64",
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}
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).extend(MQTT_ENTITY_COMMON_SCHEMA.schema)
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PLATFORM_SCHEMA_MODERN = vol.All(
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PLATFORM_SCHEMA_BASE.schema,
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)
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DISCOVERY_SCHEMA = PLATFORM_SCHEMA_BASE.extend({}, extra=vol.REMOVE_EXTRA)
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async def async_setup_entry(
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hass: HomeAssistant,
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config_entry: ConfigEntry,
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async_add_entities: AddEntitiesCallback,
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) -> None:
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"""Set up MQTT camera through YAML and through MQTT discovery."""
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setup = functools.partial(
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_async_setup_entity, hass, async_add_entities, config_entry=config_entry
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)
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await async_setup_entry_helper(hass, camera.DOMAIN, setup, DISCOVERY_SCHEMA)
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async def _async_setup_entity(
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hass: HomeAssistant,
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async_add_entities: AddEntitiesCallback,
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config: ConfigType,
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config_entry: ConfigEntry,
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discovery_data: DiscoveryInfoType | None = None,
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) -> None:
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"""Set up the MQTT Camera."""
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async_add_entities([MqttCamera(hass, config, config_entry, discovery_data)])
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class MqttCamera(MqttEntity, Camera):
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"""representation of a MQTT camera."""
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_default_name = DEFAULT_NAME
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_entity_id_format: str = camera.ENTITY_ID_FORMAT
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_attributes_extra_blocked: frozenset[str] = MQTT_CAMERA_ATTRIBUTES_BLOCKED
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_last_image: bytes | None = None
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def __init__(
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self,
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hass: HomeAssistant,
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config: ConfigType,
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config_entry: ConfigEntry,
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discovery_data: DiscoveryInfoType | None,
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) -> None:
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"""Initialize the MQTT Camera."""
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Camera.__init__(self)
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MqttEntity.__init__(self, hass, config, config_entry, discovery_data)
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@staticmethod
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def config_schema() -> vol.Schema:
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"""Return the config schema."""
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return DISCOVERY_SCHEMA
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def _prepare_subscribe_topics(self) -> None:
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"""(Re)Subscribe to topics."""
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@callback
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@log_messages(self.hass, self.entity_id)
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def message_received(msg: ReceiveMessage) -> None:
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"""Handle new MQTT messages."""
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if CONF_IMAGE_ENCODING in self._config:
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self._last_image = b64decode(msg.payload)
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else:
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if TYPE_CHECKING:
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assert isinstance(msg.payload, bytes)
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self._last_image = msg.payload
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self._sub_state = subscription.async_prepare_subscribe_topics(
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self.hass,
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self._sub_state,
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{
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"state_topic": {
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"topic": self._config[CONF_TOPIC],
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"msg_callback": message_received,
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"qos": self._config[CONF_QOS],
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"encoding": None,
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}
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},
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)
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async def _subscribe_topics(self) -> None:
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"""(Re)Subscribe to topics."""
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await subscription.async_subscribe_topics(self.hass, self._sub_state)
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async def async_camera_image(
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self, width: int | None = None, height: int | None = None
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) -> bytes | None:
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"""Return image response."""
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return self._last_image
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