old_contents: """Support for Blink system camera."""
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.camera import Camera
  from homeassistant.const import ATTR_ENTITY_ID
  from homeassistant.helpers import entity_platform
  import homeassistant.helpers.config_validation as cv
  
  from .const import DEFAULT_BRAND, DOMAIN, SERVICE_TRIGGER
  
  _LOGGER = logging.getLogger(__name__)
  
  ATTR_VIDEO_CLIP = "video"
  ATTR_IMAGE = "image"
  
  SERVICE_TRIGGER_SCHEMA = vol.Schema({vol.Optional(ATTR_ENTITY_ID): cv.comp_entity_ids})
  
  
  async def async_setup_entry(hass, config, async_add_entities):
      """Set up a Blink Camera."""
      data = hass.data[DOMAIN][config.entry_id]
      entities = []
      for name, camera in data.cameras.items():
          entities.append(BlinkCamera(data, name, camera))
  
      async_add_entities(entities)
  
      platform = entity_platform.current_platform.get()
  
      platform.async_register_entity_service(
          SERVICE_TRIGGER, SERVICE_TRIGGER_SCHEMA, "trigger_camera"
      )
  
  
  class BlinkCamera(Camera):
      """An implementation of a Blink Camera."""
  
      def __init__(self, data, name, camera):
          """Initialize a camera."""
          super().__init__()
          self.data = data
          self._name = f"{DOMAIN} {name}"
          self._camera = camera
          self._unique_id = f"{camera.serial}-camera"
          self.response = None
          self.current_image = None
          self.last_image = None
          _LOGGER.debug("Initialized blink camera %s", self._name)
  
      @property
      def name(self):
          """Return the camera name."""
          return self._name
  
      @property
      def unique_id(self):
          """Return the unique camera id."""
          return self._unique_id
  
      @property
      def extra_state_attributes(self):
          """Return the camera attributes."""
          return self._camera.attributes
  
      def enable_motion_detection(self):
          """Enable motion detection for the camera."""
          self._camera.set_motion_detect(True)
  
      def disable_motion_detection(self):
          """Disable motion detection for the camera."""
          self._camera.set_motion_detect(False)
  
      @property
      def motion_detection_enabled(self):
          """Return the state of the camera."""
          return self._camera.motion_enabled
  
      @property
      def brand(self):
          """Return the camera brand."""
          return DEFAULT_BRAND
  
      def trigger_camera(self):
          """Trigger camera to take a snapshot."""
          self._camera.snap_picture()
          self.data.refresh()
  
      def camera_image(self):
          """Return a still image response from the camera."""
          return self._camera.image_from_cache.content
  
new_contents: """Support for Blink system camera."""
  import logging
  
  from homeassistant.components.camera import Camera
  from homeassistant.helpers import entity_platform
  
  from .const import DEFAULT_BRAND, DOMAIN, SERVICE_TRIGGER
  
  _LOGGER = logging.getLogger(__name__)
  
  ATTR_VIDEO_CLIP = "video"
  ATTR_IMAGE = "image"
  
  
  async def async_setup_entry(hass, config, async_add_entities):
      """Set up a Blink Camera."""
      data = hass.data[DOMAIN][config.entry_id]
      entities = [
          BlinkCamera(data, name, camera) for name, camera in data.cameras.items()
      ]
  
      async_add_entities(entities)
  
      platform = entity_platform.current_platform.get()
      platform.async_register_entity_service(SERVICE_TRIGGER, {}, "trigger_camera")
  
  
  class BlinkCamera(Camera):
      """An implementation of a Blink Camera."""
  
      def __init__(self, data, name, camera):
          """Initialize a camera."""
          super().__init__()
          self.data = data
          self._name = f"{DOMAIN} {name}"
          self._camera = camera
          self._unique_id = f"{camera.serial}-camera"
          self.response = None
          self.current_image = None
          self.last_image = None
          _LOGGER.debug("Initialized blink camera %s", self._name)
  
      @property
      def name(self):
          """Return the camera name."""
          return self._name
  
      @property
      def unique_id(self):
          """Return the unique camera id."""
          return self._unique_id
  
      @property
      def extra_state_attributes(self):
          """Return the camera attributes."""
          return self._camera.attributes
  
      def enable_motion_detection(self):
          """Enable motion detection for the camera."""
          self._camera.set_motion_detect(True)
  
      def disable_motion_detection(self):
          """Disable motion detection for the camera."""
          self._camera.set_motion_detect(False)
  
      @property
      def motion_detection_enabled(self):
          """Return the state of the camera."""
          return self._camera.motion_enabled
  
      @property
      def brand(self):
          """Return the camera brand."""
          return DEFAULT_BRAND
  
      def trigger_camera(self):
          """Trigger camera to take a snapshot."""
          self._camera.snap_picture()
          self.data.refresh()
  
      def camera_image(self):
          """Return a still image response from the camera."""
          return self._camera.image_from_cache.content
  
subject: Fix Blink entity service schema (#50019)