Streamline setup of deCONZ fan platform (#71658)

homeassistant/components/deconz/fan.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Literal
 
+from pydeconz.models.event import EventType
 from pydeconz.models.light.fan import (
     FAN_SPEED_25_PERCENT,
     FAN_SPEED_50_PERCENT,
@@ -15,7 +16,6 @@ from pydeconz.models.light.fan import (
 from homeassistant.components.fan import DOMAIN, FanEntity, FanEntityFeature
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant, callback
-from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util.percentage import (
     ordered_list_item_to_percentage,
@@ -43,33 +43,19 @@ async def async_setup_entry(
     gateway.entities[DOMAIN] = set()
 
     @callback
-    def async_add_fan(lights: list[Fan] | None = None) -> None:
+    def async_add_fan(_: EventType, fan_id: str) -> None:
         """Add fan from deCONZ."""
-        entities = []
-
-        if lights is None:
-            lights = list(gateway.api.lights.fans.values())
-
-        for light in lights:
-
-            if (
-                isinstance(light, Fan)
-                and light.unique_id not in gateway.entities[DOMAIN]
-            ):
-                entities.append(DeconzFan(light, gateway))
-
-        if entities:
-            async_add_entities(entities)
+        fan = gateway.api.lights.fans[fan_id]
+        async_add_entities([DeconzFan(fan, gateway)])
 
     config_entry.async_on_unload(
-        async_dispatcher_connect(
-            hass,
-            gateway.signal_new_light,
+        gateway.api.lights.fans.subscribe(
             async_add_fan,
+            EventType.ADDED,
         )
     )
-
-    async_add_fan()
+    for fan_id in gateway.api.lights.fans:
+        async_add_fan(EventType.ADDED, fan_id)
 
 
 class DeconzFan(DeconzDevice, FanEntity):