Add image_processing device_class StrEnum (#79124)

homeassistant/components/image_processing/__init__.py

@@ -8,6 +8,7 @@ from typing import Any, Final, TypedDict, final
 
 import voluptuous as vol
 
+from homeassistant.backports.enum import StrEnum
 from homeassistant.components.camera import Image
 from homeassistant.const import (
     ATTR_ENTITY_ID,
@@ -30,11 +31,19 @@ _LOGGER = logging.getLogger(__name__)
 DOMAIN = "image_processing"
 SCAN_INTERVAL = timedelta(seconds=10)
 
-DEVICE_CLASSES = [
+
-    "alpr",  # Automatic license plate recognition
+class ImageProcessingDeviceClass(StrEnum):
-    "face",  # Face
+    """Device class for image processing entities."""
-    "ocr",  # OCR
+
-]
+    # Automatic license plate recognition
+    ALPR = "alpr"
+
+    # Face
+    FACE = "face"
+
+    # OCR
+    OCR = "ocr"
+
 
 SERVICE_SCAN = "scan"
 
@@ -113,6 +122,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 class ImageProcessingEntity(Entity):
     """Base entity class for image processing."""
 
+    _attr_device_class: ImageProcessingDeviceClass | str | None
     timeout = DEFAULT_TIMEOUT
 
     @property
@@ -156,6 +166,8 @@ class ImageProcessingEntity(Entity):
 class ImageProcessingFaceEntity(ImageProcessingEntity):
     """Base entity class for face image processing."""
 
+    _attr_device_class = ImageProcessingDeviceClass.FACE
+
     def __init__(self) -> None:
         """Initialize base face identify/verify entity."""
         self.faces: list[FaceInformation] = []
@@ -185,11 +197,6 @@ class ImageProcessingFaceEntity(ImageProcessingEntity):
 
         return state
 
-    @property
-    def device_class(self) -> str:
-        """Return the class of this device, from component DEVICE_CLASSES."""
-        return "face"
-
     @final
     @property
     def state_attributes(self) -> dict[str, Any]:

homeassistant/components/openalpr_local/image_processing.py

@@ -12,6 +12,7 @@ from homeassistant.components.image_processing import (
     ATTR_CONFIDENCE,
     CONF_CONFIDENCE,
     PLATFORM_SCHEMA,
+    ImageProcessingDeviceClass,
     ImageProcessingEntity,
 )
 from homeassistant.const import (
@@ -102,6 +103,8 @@ async def async_setup_platform(
 class ImageProcessingAlprEntity(ImageProcessingEntity):
     """Base entity class for ALPR image processing."""
 
+    _attr_device_class = ImageProcessingDeviceClass.ALPR
+
     def __init__(self) -> None:
         """Initialize base ALPR entity."""
         self.plates: dict[str, float] = {}
@@ -120,11 +123,6 @@ class ImageProcessingAlprEntity(ImageProcessingEntity):
                 plate = i_pl
         return plate
 
-    @property
-    def device_class(self):
-        """Return the class of this device, from component DEVICE_CLASSES."""
-        return "alpr"
-
     @property
     def extra_state_attributes(self):
         """Return device specific state attributes."""

homeassistant/components/seven_segments/image_processing.py

@@ -11,6 +11,7 @@ import voluptuous as vol
 
 from homeassistant.components.image_processing import (
     PLATFORM_SCHEMA,
+    ImageProcessingDeviceClass,
     ImageProcessingEntity,
 )
 from homeassistant.const import CONF_ENTITY_ID, CONF_NAME, CONF_SOURCE
@@ -69,6 +70,8 @@ async def async_setup_platform(
 class ImageProcessingSsocr(ImageProcessingEntity):
     """Representation of the seven segments OCR image processing entity."""
 
+    _attr_device_class = ImageProcessingDeviceClass.OCR
+
     def __init__(self, hass, camera_entity, config, name):
         """Initialize seven segments processing."""
         self.hass = hass
@@ -105,11 +108,6 @@ class ImageProcessingSsocr(ImageProcessingEntity):
         )
         self._command.append(self.filepath)
 
-    @property
-    def device_class(self):
-        """Return the class of this device, from component DEVICE_CLASSES."""
-        return "ocr"
-
     @property
     def camera_entity(self):
         """Return camera entity id from process pictures."""