'use strict'; /** * `confirm` type prompt */ var util = require('util'); var observe = require('../utils/events'); var utils = require('../utils/'); var Base = require('./base'); /** * Module exports */ module.exports = Prompt; /** * Constructor */ function Prompt() { Base.apply(this, arguments); var rawDefault = true; utils.extend(this.opt, { filter: function(input) { var value = rawDefault; if (input != null && input !== '') { value = /^y(es)?/i.test(input); } return value; }.bind(this) }); if (typeof this.opt.default === 'boolean') { rawDefault = this.opt.default; } this.opt.default = rawDefault ? 'Y/n' : 'y/N'; return this; } util.inherits(Prompt, Base); /** * Start the Inquiry session * @param {Function} cb Callback when prompt is done * @return {this} */ Prompt.prototype._run = function(cb) { this.done = cb; // Once user confirm (enter key) var events = observe(this.rl); events.keypress.takeUntil(events.line).forEach(this.onKeypress.bind(this)); events.line.take(1).forEach(this.onEnd.bind(this)); // Init this.render(); return this; }; /** * Render the prompt to screen * @return {Prompt} self */ Prompt.prototype.render = function(answer) { var message = this.getQuestion(); if (typeof answer === 'boolean') { message += utils.chalk.cyan(answer ? 'Yes' : 'No'); } else { message += this.rl.line; } this.screen.render(message); return this; }; /** * When user press `enter` key */ Prompt.prototype.onEnd = function(input) { this.status = 'answered'; var output = this.opt.filter(input); this.render(output); this.screen.done(); this.done(input); // send 'input' because the master class will refilter }; /** * When user press a key */ Prompt.prototype.onKeypress = function() { this.render(); };