stratumn-cli/src/utils/question.js

CLI tools for Stratumn

// http://stackoverflow.com/questions/24037545/how-to-hide-password-in-the-nodejs-console
function hidden(rl, query, cb) {
  function handleData(c) {
    const char = c + '';
    switch (char) {
      case '\n':
      case '\r':
      case '\u0004':
        break;
      default:
        process.stdout.write('\x1B[2K\x1B[200D' + query + Array(rl.line.length + 1).join('*'));
        break;
    }
  }

  process.stdin.on('data', handleData);

  rl.question(query, value => {
    /*eslint-disable */
    rl.history = rl.history.slice(1);
    /*eslint-enable */
    process.stdin.removeListener('data', handleData);
    cb(value);
  });
}

export default function question(rl, query, name, store = {}, opts = {}) {
  return new Promise(resolve => {
    const ask = opts.hidden ? hidden.bind(null, rl) : rl.question.bind(rl);
    ask(query, answer => {
      if (opts.required !== false && !answer) {
        question(rl, query, name, store, opts).then(resolve);
        return;
      }

      if (answer) {
        /*eslint-disable */
        store[name] = answer;
        /*eslint-enable */
      }

      resolve(answer);
    });
  });
}