Shuffle Users

shuffle-people.coffee

# Description:
#   Generates a random list of users in the room
#
# Commands:
#   hubot djs - gathers a list of users and shuffles them
#
# Author:
#   tjhanley
module.exports = (robot) ->
  robot.respond /djs/i, (msg) ->
    djs = []
    for key,userObj of robot.adapter.client.users
      if userObj.presence is "active" and (userObj.name isnt "slackbot" and userObj.name isnt "walkerbot" and userObj.name isnt 'bot')
        djs.push userObj.name
    msg.send shuffle(djs).toString()

shuffle = (array) ->
  currentIndex = array.length
  temporaryValue = undefined
  randomIndex = undefined

  # While there remain elements to shuffle...
  while 0 isnt currentIndex

    # Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex)
    currentIndex -= 1

    # And swap it with the current element.
    temporaryValue = array[currentIndex]
    array[currentIndex] = array[randomIndex]
    array[randomIndex] = temporaryValue
  array