pimatic-johnny-five/devices/johnny-five-switch.coffee

Pimatic Plugin for Johnny Five, a Robotics and IoT programming framework.

module.exports = (env) ->

  Promise = env.require 'bluebird'
  _ = env.require 'lodash'
  five = require('johnny-five')
  commons = require('pimatic-plugin-commons')(env)


  # Device class representing an Johnny Five digital output
  class JohnnyFiveSwitch extends env.devices.SwitchActuator

    # Create a new JohnnyFiveSwitch device
    # @param [Object] config    device configuration
    # @param [JohnnyFivePlugin] plugin   plugin instance
    # @param [Object] lastState state information stored in database
    constructor: (@config, @plugin, lastState) ->
      @id = @config.id
      @name = @config.name
      super()
      @debug = @plugin.config.debug || false
      @_base = commons.base @, @config.class
      @_state = off
      @boardHandle = @plugin.boardManager.getBoard(@config.boardId)
      #console.log("----------------------", lastState)

      @boardHandle.boardReady()
        .then (board)=>
          @_base.debug "initializing digital output pin #{@config.pin}"
          @pin = new five.Pin {
            pin: @config.pin
            type: "digital"
            mode: 1
            board: board
          }
          @changeStateTo lastState?.state?.value or off
        .catch (error) =>
          @_base.rejectWithError null, error


    destroy: () ->
      super()


    _queryState: () ->
      return new Promise( (resolve, reject) =>
        @boardHandle.boardReady()
          .then (board) =>
            try
              if (board.remote)
                resolve @_state
              else
                resolve if @pin.value is 1 then true else false
            catch e
              @_base.rejectWithError reject, e
          .catch (error) =>
            @_base.rejectWithError reject, error
      )

    changeStateTo: (newState) ->
      @_base.debug "state change requested to: #{newState}"
      return new Promise (resolve, reject) =>
        @boardHandle.boardReady()
          .then (board)=>
            stateVal = if newState then 1 else 0
            try
              @pin.write stateVal
            catch e
              @_base.rejectWithError reject, e

            if board.remote
              @_setState newState
              resolve()
            else
              @_queryState()
                .then (state) =>
                  @_setState state
                  resolve()
          .catch (error) =>
            @_base.rejectWithError reject, error


    getState: () ->
      return Promise.resolve @_state