now-cli/lib/utils/input/list.js

const chalk = require('chalk');
const inquirer = require('inquirer');
const stripAnsi = require('strip-ansi');

/* eslint-disable no-multiple-empty-lines, no-var, no-undef, no-eq-null, eqeqeq, semi */
inquirer.prompt.prompts.list.prototype.getQuestion = function() {
  var message = chalk.bold('> ' + this.opt.message) + ' ';

  // Append the default if available, and if question isn't answered
  if (this.opt.default != null && this.status !== 'answered') {
    message += chalk.dim('(' + this.opt.default + ') ');
  }

  return message;
};
/* eslint-enable */

function getLength(string) {
  let biggestLength = 0;
  string.split('\n').map(str => {
    str = stripAnsi(str);
    if (str.length > biggestLength) {
      biggestLength = str.length;
    }
    return undefined;
  });
  return biggestLength;
}

module.exports = async function(
  {
    message = 'the question',
    // eslint-disable-line no-unused-vars
    choices = [
      {
        name: 'something\ndescription\ndetails\netc',
        value: 'something unique',
        short: 'generally the first line of `name`'
      }
    ],
    pageSize = 15, // Show 15 lines without scrolling (~4 credit cards)
    separator = true, // puts a blank separator between each choice
    abort = 'end' // wether the `abort` option will be at the `start` or the `end`
  }
) {
  let biggestLength = 0;

  choices = choices.map(choice => {
    if (choice.name) {
      const length = getLength(choice.name);
      if (length > biggestLength) {
        biggestLength = length;
      }
      return choice;
    }
    throw new Error('Invalid choice');
  });

  if (separator === true) {
    choices = choices.reduce(
      (prev, curr) => prev.concat(new inquirer.Separator(' '), curr),
      []
    );
  }

  const abortSeparator = new inquirer.Separator('─'.repeat(biggestLength));
  const _abort = {
    name: 'Abort',
    value: undefined
  };

  if (abort === 'start') {
    const blankSep = choices.shift();
    choices.unshift(abortSeparator);
    choices.unshift(_abort);
    choices.unshift(blankSep);
  } else {
    choices.push(abortSeparator);
    choices.push(_abort);
  }

  const nonce = Date.now();
  const answer = await inquirer.prompt({
    name: nonce,
    type: 'list',
    message,
    choices,
    pageSize
  });

  return answer[nonce];
};