Refactor Tradfri base class (#27589)

* Refactor Tradfri base class

* Clarify doc

* Fix pylint

* Review fix

* Move

homeassistant/components/tradfri/base_class.py

@@ -10,8 +10,11 @@ from .const import DOMAIN
 _LOGGER = logging.getLogger(__name__)
 
 
-class TradfriBaseDevice(Entity):
-    """Base class for a TRADFRI device."""
+class TradfriBaseClass(Entity):
+    """Base class for IKEA TRADFRI.
+
+    All devices and groups should ultimately inherit from this class.
+    """
 
     def __init__(self, device, api, gateway_id):
         """Initialize a device."""
@@ -54,20 +57,6 @@ class TradfriBaseDevice(Entity):
         """Return True if entity is available."""
         return self._available
 
-    @property
-    def device_info(self):
-        """Return the device info."""
-        info = self._device.device_info
-
-        return {
-            "identifiers": {(DOMAIN, self._device.id)},
-            "manufacturer": info.manufacturer,
-            "model": info.model_number,
-            "name": self._name,
-            "sw_version": info.firmware_version,
-            "via_device": (DOMAIN, self._gateway_id),
-        }
-
     @property
     def name(self):
         """Return the display name of this device."""
@@ -94,3 +83,24 @@ class TradfriBaseDevice(Entity):
         self._device = device
         self._name = device.name
         self._available = device.reachable
+
+
+class TradfriBaseDevice(TradfriBaseClass):
+    """Base class for a TRADFRI device.
+
+    All devices should inherit from this class.
+    """
+
+    @property
+    def device_info(self):
+        """Return the device info."""
+        info = self._device.device_info
+
+        return {
+            "identifiers": {(DOMAIN, self._device.id)},
+            "manufacturer": info.manufacturer,
+            "model": info.model_number,
+            "name": self._name,
+            "sw_version": info.firmware_version,
+            "via_device": (DOMAIN, self._gateway_id),
+        }