image_processing.py

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"""Support for the QR code image processing."""
 
from __future__ import annotations
 
import io
 
from PIL import Image
from pyzbar import pyzbar
 
from homeassistant.components.image_processing import ImageProcessingEntity
from homeassistant.const import CONF_ENTITY_ID, CONF_NAME, CONF_SOURCE
from homeassistant.core import HomeAssistant, split_entity_id
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 
def setup_platform(
    hass: HomeAssistant,
    config: ConfigType,
    add_entities: AddEntitiesCallback,
    discovery_info: DiscoveryInfoType | None = None,
) -> None:
    """Set up the QR code image processing platform."""
    add_entities(
        QrEntity(camera[CONF_ENTITY_ID], camera.get(CONF_NAME))
        for camera in config[CONF_SOURCE]
    )
 
 
class QrEntity(ImageProcessingEntity):
    """A QR image processing entity."""
 
    def __init__(self, camera_entity, name):
        """Initialize QR image processing entity."""
        super().__init__()
 
        self._camera_camera = camera_entity
        if name:
            self._name_name = name
        else:
            self._name_name = f"QR {split_entity_id(camera_entity)[1]}"
        self._state_state = None
 
    @property
    def camera_entity(self):
        """Return camera entity id from process pictures."""
        return self._camera_camera
 
    @property
    def state(self):
        """Return the state of the entity."""
        return self._state_state
 
    @property
    def name(self):
        """Return the name of the entity."""
        return self._name_name
 
    def process_image(self, image):
        """Process image."""
        stream = io.BytesIO(image)
        img = Image.open(stream)
 
        barcodes = pyzbar.decode(img)
        if barcodes:
            self._state_state = barcodes[0].data.decode("utf-8")
        else:
            self._state_state = None