pimatic-led-light color_action edited

module.exports = (env) ->

  Promise = env.require 'bluebird'

  assert = require 'cassert'
  _ = require 'lodash'
  M = env.matcher

  color_schema = require '../color_schema'

  class ColorActionHandler extends env.actions.ActionHandler
    constructor: (@provider, @device, @color, @variable, @hex) ->
      @_variableManager = null

      if @variable
        @_variableManager = @provider.framework.variableManager

    executeAction: (simulate) =>
      getColor = (callback) =>
        if @variable
          if @hex
            callback @variable, simulate
          else
          @_variableManager.evaluateStringExpression([@variable])
            .then (temperature) =>
              temperatureColor = new Color()
              hue = 30 + 240 * (30 - temperature) / 60;
              temperatureColor.hsl(hue, 70, 50)

              hexColor = '#'
              hexColor += temperatureColor.rgb().r.toString(16)
              hexColor += temperatureColor.rgb().g.toString(16)
              hexColor += temperatureColor.rgb().b.toString(16)

              callback hexColor, simulate
        else
          callback @color, simulate

      getColor @setColor

    setColor: (color, simulate) =>
      if simulate
        return Promise.resolve(__("would log set color #{color}"))
      else
        @device.setColor color
        return Promise.resolve(__("set color #{color}"))

  class ColorActionProvider extends env.actions.ActionProvider
      constructor: (@framework) ->

      parseAction: (input, context) =>
        iwyDevices = _(@framework.deviceManager.devices).values().filter(
          (device) => device.hasAction("setColor")
        ).value()

        hadPrefix = false

        # Try to match the input string with: set ->
        m = M(input, context).match(['set '])

        device = null
        color = null
        match = null
        variable = null

        # device name -> color
        m.matchDevice iwyDevices, (m, d) ->
          # Already had a match with another device?
          if device? and device.id isnt d.id
            context?.addError(""""#{input.trim()}" is ambiguous.""")
            return

          device = d

          m.match [' to '], (m) ->
            m.or [
              # rgb hex like #00FF00
              (m) ->
                # TODO: forward pattern to UI
                m.match [/(#[a-fA-F\d]{6})(.*)/], (m, s) ->
                  color = s.trim()
                  match = m.getFullMatch()

              # color name like red
              (m) -> m.match _.keys(color_schema), (m, s) ->
                  color = color_schema[s]
                  match = m.getFullMatch()

              # color by temperature from variable like $weather.temperature = 30
              (m) ->
                m.match ['temperature based color by variable '], (m) ->
                  m.matchVariable (m, s) ->
                    variable = s
                    match = m.getFullMatch()
              # color by hex variable like $myVar = #FFFFFF
              (m) ->
                m.match ['hex based color by variable '], (m) ->
                  m.matchVariable (m, s) ->
                    variable = s
                    match = m.getFullMatch()
            ]

        if match?
          assert device?
          # either variable or color should be set
          assert variable? ^ color?
          assert typeof match is "string"
          return {
            token: match
            nextInput: input.substring(match.length)
            actionHandler: new ColorActionHandler(@, device, color, variable, hex)
          }
        else
          return null

  return ColorActionProvider