node-red-contrib-homekit-mqtt/homekit.js

Node-RED nodes to simulate Apple HomeKit devices

module.exports = function (RED) {
    'use strict'

    var API = require('./lib/api.js')(RED)
    var HapNodeJS = require('hap-nodejs')
    var Accessory = HapNodeJS.Accessory
    var Service = HapNodeJS.Service
    var Characteristic = HapNodeJS.Characteristic
    var uuid = HapNodeJS.uuid

    // Initialize our storage system
    if (RED.settings.available()) {
      var userDir = RED.settings.userDir

      HapNodeJS.init(userDir + '/homekit-persist')
    } else {
      HapNodeJS.init()
    }

    // Initialize API
    API.init()

    var AccessoryNames = []

    //
    //
    function accessoryNameUsed(name, id) {
        var nameNotExist = AccessoryNames[name] === undefined

        if (nameNotExist) {
            AccessoryNames[name] = id
            return false
        }

        return true
    }
    //
    //
    function accessoryRemoveName(name, id) {
        var nameNotExist = AccessoryNames[name] === undefined

        if (nameNotExist) {
            RED.log.debug("accessoryRemoveName(): not exists; " + name)
        } else if(AccessoryNames[name] == id) {
            delete AccessoryNames[name]
        } else {
            RED.log.debug("accessoryRemoveName(): exists but id mismatch; " + name)
            delete AccessoryNames[name]
        }

        if (Object.keys(AccessoryNames).length == 0) {

        }
    }

    function HAPAccessoryNode (n) {
      RED.nodes.createNode(this, n)

      // config node properties
      this.name         = n.accessoryName
      this.pinCode      = n.pinCode
      this.port         = n.port
      this.manufacturer = n.manufacturer
      this.serialNo     = n.serialNo
      this.model        = n.model

      var node   = this

      if (accessoryNameUsed(this.name, this.id)) {
          RED.log.error("HAPAccessoryNode(): accessory name already in use! this.name = " + this.name)
          this.name = Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 5)
      }

      try {
          // generate UUID and username (MAC-address) from node id
          var accessoryUUID     = uuid.generate(this.id)
          var accessoryUsername = macify(this.id)

          // create accessory object
          var accessory = new Accessory(this.name, accessoryUUID)
          accessory.getService(Service.AccessoryInformation)
              .setCharacteristic(Characteristic.Manufacturer, this.manufacturer)
              .setCharacteristic(Characteristic.SerialNumber, this.serialNo)
              .setCharacteristic(Characteristic.Model,        this.model)

          // publish accessory
          accessory.publish({
              username: accessoryUsername,
              pincode:  this.pinCode,
              port:     this.port || 0
          }, true)

          this.accessory = accessory
      } catch(err) {
          RED.log.error("HAPAccessoryNode(): err = " + err)
      }

      this.on('close', function (removed, done) {
        accessoryRemoveName(node.name, node.id)

        if (removed) {
          // this node has been deleted
          RED.log.debug("HAPAccessoryNode(close): Node has been deleted; " + this.name)
          node.accessory.destroy()
        } else {
          // this node is being restarted
          RED.log.debug("HAPAccessoryNode(close): Node is being restarted; " + this.name)
        }

        done()
      })
    }

    RED.nodes.registerType('homekit-accessory-v2', HAPAccessoryNode)

  /*function HAPServiceNode (n) {
    RED.nodes.createNode(this, n)

    try {
      // service node properties
      this.name = n.name
      this.serviceName = n.serviceName
      this.configNode = RED.nodes.getNode(n.accessory)

      // generate UUID from node id
      var subtypeUUID = uuid.generate(this.id)

      // add service
      var accessory = this.configNode.accessory
      var service = accessory.addService(Service[this.serviceName], this.name, subtypeUUID)

      this.service = service
      var node = this

      // the pinCode should be shown to the user until interaction with
      // iOS client starts
      node.status({fill: 'yellow', shape: 'ring', text: node.configNode.pinCode})

      // emit message when value changes
      service.on('characteristic-change', function (info) {
        var msg = { payload: {}, hap: info}
        var key = info.characteristic.displayName.replace(/ /g, '')
        msg.payload[key] = info.newValue
        node.status({fill: 'yellow', shape: 'dot', text: key + ': ' + info.newValue})
        setTimeout(function () { node.status({}) }, 3000)
        node.send(msg)
      })

      // which characteristics are supported?
      var supported = { read: [], write: []}

      var allCharacteristics = service.characteristics.concat(service.optionalCharacteristics)
      allCharacteristics.map(function (characteristic, index) {
        var cKey = characteristic.displayName.replace(/ /g, '')
        if (characteristic.props.perms.indexOf('pw') > -1) {
          supported.read.push(cKey)
        }
        if ((characteristic.props.perms.indexOf('pr') + characteristic.props.perms.indexOf('ev')) > -2) {
          supported.write.push(cKey)
        }
      })

      // respond to inputs
      this.on('input', function (msg) {
        if (msg.hasOwnProperty('payload')) {
          // payload must be an object
          var type = typeof msg.payload
          if (type != 'object') {
            node.warn('Invalid payload type: ' + type)
            return
          }
        } else {
          node.warn('Invalid message (payload missing)')
          return
        }

        // iterate over characteristics to be written
        Object.keys(msg.payload).map(function (key, index) {
          if (supported.write.indexOf(key) < 0) {
            // characteristic is not supported
            node.warn('Characteristic ' + key + ' cannot be written.\nTry one of these: ' + supported.write.join(', '))
          } else {
            service.setCharacteristic(Characteristic[key], (msg.payload[key]))
          }
        })
      })

      this.on('close', function () {
        accessory.removeService(service)
      })
    } catch(err) {
      console.log("HAPServiceNode() err = ", err)
    }
  }*/
  //RED.nodes.registerType('homekit-service-v2', HAPServiceNode)
}

function pad (str, length) {
  return (str.length < length) ? pad('0' + str, length) : str
}

function macify (nodeId) {
  var noDecimalStr = nodeId.replace('.', '')
  var paddedStr = pad(noDecimalStr, 16)
  var macifiedStr = paddedStr.match(/.{1,2}/g).join(':')
  return macifiedStr
}