feat: add filter life & condition (thanks @jeffmaki!)

part of #40

src/characteristic/filterChangeCharacteristic.ts

@@ -0,0 +1,60 @@
+import type { Service, Characteristic } from 'homebridge'
+import type { GetDeviceResponse } from '../thinq/apiTypes'
+
+import { HomebridgeLgThinqPlatform } from '../platform'
+import AbstractCharacteristic from './abstractCharacteristic'
+
+type State = 0 | 1
+
+type ApiValue = boolean
+
+export default class FilterChangeCharacteristic extends AbstractCharacteristic<
+  State,
+  // @ts-expect-error This characteristic is a hack
+  ApiValue,
+  typeof Characteristic.FilterChangeIndication
+> {
+  constructor(
+    platform: HomebridgeLgThinqPlatform,
+    service: Service,
+    deviceId: string,
+  ) {
+    super(
+      platform,
+      service,
+      deviceId,
+      platform.Characteristic.FilterChangeIndication,
+      'Operation',
+      // @ts-expect-error This characteristic is a hack
+      '_fake_filter_change_value',
+    )
+  }
+
+  // Override default handleUpdatedSnapshot() to ignore based on mode
+  handleUpdatedSnapshot(snapshot: GetDeviceResponse['result']['snapshot']) {
+    const maxTime = snapshot['airState.filterMngStates.maxTime']
+    const useTime = snapshot['airState.filterMngStates.useTime']
+    const shouldFilterBeChanged = useTime >= maxTime
+
+    super.handleUpdatedSnapshot({
+      ...snapshot,
+      // @ts-expect-error This characteristic is a hack
+      _fake_filter_change_value: shouldFilterBeChanged,
+    })
+  }
+
+  getStateFromApiValue(apiValue: ApiValue): State {
+    return apiValue
+      ? this.characteristic.CHANGE_FILTER
+      : this.characteristic.FILTER_OK
+  }
+
+  handleSet = undefined
+
+  getApiValueFromState(state: State): ApiValue {
+    if (state === this.characteristic.CHANGE_FILTER) {
+      return true
+    }
+    return false
+  }
+}

src/characteristic/filterLifeCharacteristic.ts

@@ -0,0 +1,55 @@
+import type { Service, Characteristic } from 'homebridge'
+import type { GetDeviceResponse } from '../thinq/apiTypes'
+
+import { HomebridgeLgThinqPlatform } from '../platform'
+import AbstractCharacteristic from './abstractCharacteristic'
+
+type State = number
+
+type ApiValue = number
+
+export default class FilterLifeCharacteristic extends AbstractCharacteristic<
+  State,
+  ApiValue,
+  typeof Characteristic.FilterLifeLevel
+> {
+  constructor(
+    platform: HomebridgeLgThinqPlatform,
+    service: Service,
+    deviceId: string,
+  ) {
+    super(
+      platform,
+      service,
+      deviceId,
+      platform.Characteristic.FilterLifeLevel,
+      'Operation',
+      // @ts-expect-error This characteristic is a hack
+      '_fake_filter_life',
+    )
+  }
+
+  // Override default handleUpdatedSnapshot() to ignore based on mode
+  handleUpdatedSnapshot(snapshot: GetDeviceResponse['result']['snapshot']) {
+    const maxTime = snapshot['airState.filterMngStates.maxTime']
+    const useTime = snapshot['airState.filterMngStates.useTime']
+    const percentUsed = (useTime / maxTime) * 100
+    const filterLife = Math.floor(100 - percentUsed)
+
+    super.handleUpdatedSnapshot({
+      ...snapshot,
+      // @ts-expect-error This characteristic is a hack
+      _fake_filter_life: filterLife,
+    })
+  }
+
+  getStateFromApiValue(apiValue: ApiValue): State {
+    return apiValue
+  }
+
+  handleSet = undefined
+
+  getApiValueFromState(state: State): ApiValue {
+    return state
+  }
+}

src/getCharacteristicsForModel.ts

@@ -10,6 +10,8 @@ import CoolingThresholdTemperatureCharacteristic from './characteristic/coolingT
 import HeatingThresholdTemperatureCharacteristic from './characteristic/heatingThresholdTemperatureCharacteristic'
 import TargetHeaterCoolerStateCharacteristic from './characteristic/targetHeaterCoolerStateCharacteristic'
 import CurrentTemperatureCharacteristic from './characteristic/currentTemperatureCharacteristic'
+import FilterChangeCharacteristic from './characteristic/filterChangeCharacteristic'
+import FilterLifeCharacteristic from './characteristic/filterLifeCharacteristic'
 
 export default function getCharacteristicsForModel(
   model: string,
@@ -44,6 +46,8 @@ export default function getCharacteristicsForModel(
           true,
         ),
         new CurrentTemperatureCharacteristic(platform, service, deviceId),
+        new FilterChangeCharacteristic(platform, service, deviceId),
+        new FilterLifeCharacteristic(platform, service, deviceId),
       ]
     // LW8017ERSM -- 3 fan modes
     // LW1517IVSM -- 4 fan modes
@@ -63,6 +67,8 @@ export default function getCharacteristicsForModel(
         ),
         new TargetHeaterCoolerStateCharacteristic(platform, service, deviceId),
         new CurrentTemperatureCharacteristic(platform, service, deviceId),
+        new FilterChangeCharacteristic(platform, service, deviceId),
+        new FilterLifeCharacteristic(platform, service, deviceId),
       ]
     // LP1419IVSM
     case 'POT_056905_WW':
@@ -89,6 +95,8 @@ export default function getCharacteristicsForModel(
         ),
         new TargetHeaterCoolerStateCharacteristic(platform, service, deviceId),
         new CurrentTemperatureCharacteristic(platform, service, deviceId),
+        new FilterChangeCharacteristic(platform, service, deviceId),
+        new FilterLifeCharacteristic(platform, service, deviceId),
       ]
   }
 }