vnfmarket/src/main/webapp/vnfmarket/node_modules/karma/lib/init/state_machine.js

   1 var util = require('util')
   2 var EventEmitter = require('events').EventEmitter
   3
   4 var StateMachine = function (rli, colors) {
   5   var questions
   6   var currentQuestion
   7   var answers
   8   var currentOptions
   9   var currentOptionsPointer
  10   var currentQuestionId
  11   var done
  12
  13   EventEmitter.call(this)
  14
  15   var showPrompt = function () {
  16     rli.write(colors.ANSWER)
  17     rli.prompt()
  18   }
  19
  20   this.onKeypress = function (key) {
  21     if (!currentOptions || !key) {
  22       return
  23     }
  24
  25     if (key.name === 'tab' || key.name === 'right' || key.name === 'down') {
  26       this.suggestNextOption()
  27     } else if (key.name === 'left' || key.name === 'up') {
  28       currentOptionsPointer = currentOptionsPointer + currentOptions.length - 2
  29       this.suggestNextOption()
  30     }
  31
  32     if (!key.ctrl && !key.meta && key.name !== 'enter' && key.name !== 'return') {
  33       key.name = 'escape'
  34     }
  35   }
  36
  37   this.suggestNextOption = function () {
  38     if (!currentOptions) {
  39       return
  40     }
  41
  42     currentOptionsPointer = (currentOptionsPointer + 1) % currentOptions.length
  43     rli._deleteLineLeft()
  44     rli._deleteLineRight()
  45     rli.write(currentOptions[currentOptionsPointer])
  46   }
  47
  48   this.kill = function () {
  49     currentOptions = null
  50     currentQuestionId = null
  51     rli.write('\n' + colors.RESET + '\n')
  52     rli.close()
  53   }
  54
  55   this.onLine = function (line) {
  56     if (currentQuestionId) {
  57       rli.write(colors.RESET)
  58       line = line.trim().replace(colors.ANSWER, '').replace(colors.RESET, '')
  59
  60       if (currentOptions) {
  61         currentOptionsPointer = currentOptions.indexOf(line)
  62         if (currentOptionsPointer === -1) {
  63           return
  64         }
  65       }
  66
  67       if (line === '') {
  68         line = null
  69       }
  70
  71       if (currentQuestion.boolean) {
  72         line = (line === 'yes' || line === 'true' || line === 'on')
  73       }
  74
  75       if (line !== null && currentQuestion.validate) {
  76         currentQuestion.validate(line)
  77       }
  78
  79       if (currentQuestion.multiple) {
  80         answers[currentQuestionId] = answers[currentQuestionId] || []
  81         if (line !== null) {
  82           answers[currentQuestionId].push(line)
  83           showPrompt()
  84
  85           if (currentOptions) {
  86             currentOptions.splice(currentOptionsPointer, 1)
  87             currentOptionsPointer = -1
  88           }
  89         } else {
  90           this.nextQuestion()
  91         }
  92       } else {
  93         answers[currentQuestionId] = line
  94         this.nextQuestion()
  95       }
  96     }
  97   }
  98
  99   this.nextQuestion = function () {
 100     currentQuestion = questions.shift()
 101
 102     while (currentQuestion && currentQuestion.condition && !currentQuestion.condition(answers)) {
 103       currentQuestion = questions.shift()
 104     }
 105
 106     this.emit('next_question', currentQuestion)
 107
 108     if (currentQuestion) {
 109       currentQuestionId = null
 110
 111       rli.write('\n' + colors.question(currentQuestion.question) + '\n')
 112       rli.write(currentQuestion.hint + '\n')
 113       showPrompt()
 114
 115       currentOptions = currentQuestion.options || null
 116       currentOptionsPointer = -1
 117       currentQuestionId = currentQuestion.id
 118
 119       this.suggestNextOption()
 120     } else {
 121       currentQuestionId = null
 122       currentOptions = null
 123
 124       // end
 125       this.kill()
 126       done(answers)
 127     }
 128   }
 129
 130   this.process = function (_questions, _done) {
 131     questions = _questions
 132     answers = {}
 133     done = _done
 134
 135     this.nextQuestion()
 136   }
 137 }
 138
 139 util.inherits(StateMachine, EventEmitter)
 140
 141 module.exports = StateMachine