@homebridge-plugins/homebridge-ewelink/lib/device/zigbee/light-dimmer.js

Homebridge plugin to integrate eWeLink devices into HomeKit.

import platformConsts from '../../utils/constants.js'
import { generateRandomString, hasProperty, sleep } from '../../utils/functions.js'

export default class {
  constructor(platform, accessory) {
    // Set up variables from the platform
    this.hapChar = platform.api.hap.Characteristic
    this.hapErr = platform.api.hap.HapStatusError
    this.hapServ = platform.api.hap.Service
    this.lang = platform.lang
    this.log = platform.log
    this.platform = platform

    // Set up variables from the accessory
    this.name = accessory.displayName
    this.accessory = accessory

    // Set up custom variables for this device type
    const deviceConf = platform.deviceConf[accessory.context.eweDeviceId] || {}
    this.brightStep = deviceConf.brightnessStep
      ? Math.min(deviceConf.brightnessStep, 100)
      : platformConsts.defaultValues.brightnessStep

    // Set the correct logging variables for this accessory
    switch (deviceConf.overrideLogging) {
      case 'standard':
        this.enableLogging = true
        this.enableDebugLogging = false
        break
      case 'debug':
        this.enableLogging = true
        this.enableDebugLogging = true
        break
      case 'disable':
        this.enableLogging = false
        this.enableDebugLogging = false
        break
      default:
        this.enableLogging = !platform.config.disableDeviceLogging
        this.enableDebugLogging = platform.config.debug
        break
    }

    // Add the lightbulb service if it doesn't already exist
    this.service = this.accessory.getService(this.hapServ.Lightbulb)
      || this.accessory.addService(this.hapServ.Lightbulb)

    // Add the get/set handler to the lightbulb on/off characteristic
    this.service
      .getCharacteristic(this.hapChar.On)
      .onGet(() => {
        if (this.isOnline) {
          return this.service.getCharacteristic(this.hapChar.On).value
        }
        throw new this.hapErr(-70402)
      })
      .onSet(async value => this.internalStateUpdate(value))

    // Add the set handler to the lightbulb brightness characteristic
    this.service
      .getCharacteristic(this.hapChar.Brightness)
      .setProps({ minStep: this.brightStep })
      .onSet(async value => this.internalBrightnessUpdate(value))

    // Output the customised options to the log
    const normalLogging = this.enableLogging ? 'standard' : 'disable'
    const opts = JSON.stringify({
      brightnessStep: this.brightStep,
      logging: this.enableDebugLogging ? 'debug' : normalLogging,
    })
    this.log('[%s] %s %s.', this.name, this.lang.devInitOpts, opts)
  }

  async internalStateUpdate(value) {
    try {
      const newValue = value ? 'on' : 'off'
      await this.platform.sendDeviceUpdate(this.accessory, {
        switch: newValue,
      })
      this.cacheState = newValue
      if (this.enableLogging) {
        this.log('[%s] %s [%s].', this.name, this.lang.curState, this.cacheState)
      }
    } catch (err) {
      this.platform.deviceUpdateError(this.accessory, err, true)
      setTimeout(() => {
        this.service.updateCharacteristic(this.hapChar.On, this.cacheState === 'on')
      }, 2000)
      throw new this.hapErr(-70402)
    }
  }

  async internalBrightnessUpdate(value) {
    try {
      if (this.cacheBright === value || value === 0) {
        return
      }
      const updateKey = generateRandomString(5)
      this.updateKey = updateKey
      await sleep(500)
      if (updateKey !== this.updateKey) {
        return
      }
      const params = {
        switch: 'on',
        brightness: value,
      }
      await this.platform.sendDeviceUpdate(this.accessory, params)
      this.cacheBright = value
      if (this.enableLogging) {
        this.log('[%s] %s [%s%].', this.name, this.lang.curBright, this.cacheBright)
      }
    } catch (err) {
      this.platform.deviceUpdateError(this.accessory, err, true)
      setTimeout(() => {
        this.service.updateCharacteristic(this.hapChar.Brightness, this.cacheBright)
      }, 2000)
      throw new this.hapErr(-70402)
    }
  }

  async externalUpdate(params) {
    try {
      if (params.switch && params.switch !== this.cacheState) {
        this.cacheState = params.switch
        this.service.updateCharacteristic(this.hapChar.On, this.cacheState === 'on')
        if (params.updateSource && this.enableLogging) {
          this.log('[%s] %s [%s].', this.name, this.lang.curState, this.cacheState)
        }
      }
      if (hasProperty(params, 'brightness')) {
        if (params.brightness !== this.cacheBright) {
          this.cacheBright = params.brightness
          this.service.updateCharacteristic(this.hapChar.Brightness, this.cacheBright)
          if (params.updateSource && this.enableLogging) {
            this.log('[%s] %s [%s%].', this.name, this.lang.curBright, this.cacheBright)
          }
        }
      }
    } catch (err) {
      this.platform.deviceUpdateError(this.accessory, err, false)
    }
  }

  markStatus(isOnline) {
    this.isOnline = isOnline
  }
}