yun-cli/lib/ask.js

A simple CLI for scaffolding Vue.js projects with yun-ui.

var async = require('async')
var inquirer = require('inquirer')
var evaluate = require('./eval')

// Support types from prompt-for which was used before
var promptMapping = {
    string: 'input',
    boolean: 'confirm'
}

/**
 * Ask questions, return results.
 *
 * @param {Object} prompts
 * @param {Object} data
 * @param {Function} done
 */

module.exports = function ask (prompts, data, done) {
    async.eachSeries(Object.keys(prompts), function (key, next) {
        prompt(data, key, prompts[key], next)
    }, done)
}

/**
 * Inquirer prompt wrapper.
 *
 * @param {Object} data
 * @param {String} key
 * @param {Object} prompt
 * @param {Function} done
 */

function prompt (data, key, prompt, done) {
    // skip prompts whose when condition is not met
    if (prompt.when && !evaluate(prompt.when, data)) {
        return done()
    }
    
    var promptDefault = prompt.default
    if (typeof prompt.default === 'function') {
        promptDefault = function () {
            return prompt.default.bind(this)(data)
        }
    }
    
    inquirer.prompt([{
        type: promptMapping[prompt.type] || prompt.type,
        name: key,
        message: prompt.message || prompt.label || key,
        default: promptDefault,
        choices: prompt.choices || [],
        validate: prompt.validate || function () {
            return true
        }
    }], function (answers) {
        if (Array.isArray(answers[key])) {
            data[key] = {}
            answers[key].forEach(function (multiChoiceAnswer) {
                data[key][multiChoiceAnswer] = true
            })
        } else {
            data[key] = answers[key]
        }
        done()
    })
}