wfe-cli/lib/ask.js

Front end scaffolding tool

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

// Support types from prompt-for which was used before
const 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), (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)) {
        // set undefined value to avoid failure on filter evaluations
        data[key] = undefined
        return done()
    }

    let 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 || (() => true),
        pageSize: prompt.pageSize || 10,
        highlight: prompt.highlight || true,
        searchable: prompt.searchable || true,
        source: prompt.source || null
    }]).then(answers => {
        if (Array.isArray(answers[key])) {
            data[key] = {}
            answers[key].forEach(multiChoiceAnswer => {
                data[key][multiChoiceAnswer] = true
            })
        } else if (typeof answers[key] === 'string') {
            data[key] = answers[key].replace(/"/g, '\\"')
        } else {
            data[key] = answers[key]
        }
        done()
    }).catch(done)
}