Use entity class attributes for Blackbird (#52889)

* Use entity class attributes for blackbird

* rework

* undo media_title

homeassistant/components/blackbird/media_player.py

@@ -131,6 +131,8 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
 class BlackbirdZone(MediaPlayerEntity):
     """Representation of a Blackbird matrix zone."""
 
+    _attr_supported_features = SUPPORT_BLACKBIRD
+
     def __init__(self, blackbird, sources, zone_id, zone_name):
         """Initialize new zone."""
         self._blackbird = blackbird
@@ -139,55 +141,28 @@ class BlackbirdZone(MediaPlayerEntity):
         # dict source name -> source_id
         self._source_name_id = {v: k for k, v in sources.items()}
         # ordered list of all source names
-        self._source_names = sorted(
+        self._attr_source_list = sorted(
             self._source_name_id.keys(), key=lambda v: self._source_name_id[v]
         )
         self._zone_id = zone_id
-        self._name = zone_name
-        self._state = None
-        self._source = None
+        self._attr_name = zone_name
 
     def update(self):
         """Retrieve latest state."""
         state = self._blackbird.zone_status(self._zone_id)
         if not state:
             return
-        self._state = STATE_ON if state.power else STATE_OFF
+        self._attr_state = STATE_ON if state.power else STATE_OFF
         idx = state.av
         if idx in self._source_id_name:
-            self._source = self._source_id_name[idx]
+            self._attr_source = self._source_id_name[idx]
         else:
-            self._source = None
-
-    @property
-    def name(self):
-        """Return the name of the zone."""
-        return self._name
-
-    @property
-    def state(self):
-        """Return the state of the zone."""
-        return self._state
-
-    @property
-    def supported_features(self):
-        """Return flag of media commands that are supported."""
-        return SUPPORT_BLACKBIRD
+            self._attr_source = None
 
     @property
     def media_title(self):
         """Return the current source as media title."""
-        return self._source
-
-    @property
-    def source(self):
-        """Return the current input source of the device."""
-        return self._source
-
-    @property
-    def source_list(self):
-        """List of available input sources."""
-        return self._source_names
+        return self.source
 
     def set_all_zones(self, source):
         """Set all zones to one source."""