reorder-cli/reorder.js

A NodeJS CLI list reorder-er

const readlineSync = require('readline-sync')

/**
 * @param {string[]} list   list of any length to reorder.
 * @return {Array}
 */
module.exports = function reorderCLI(list) {
  let key, index = 0;

  console.log('\nUP:[W]  DOWN:[S]  HOLD:[SHIFT]  DONE:[SPACE]' + '\n'.repeat(list.length + 1));

  while (true) {
    list = getSelected(list, index)
    console.log('\x1B[1A\x1B[K'.repeat(list.length) + list.join('\n'));
    key = readlineSync.keyIn('', { hideEchoBack: true, mask: '', limit: 'wsWS ' });

    if (key.toLowerCase() == 'w') {
      if (key.toUpperCase() === key) {
        [list[index - 1], list[index]] = [list[index], list[index - 1]]
      }
      if (index > 0) index--
    }
    else if (key.toLowerCase() == 's') {
      if (key.toUpperCase() === key) {
        [list[index], list[index + 1]] = [list[index + 1], list[index]]
      }
      if (index < list.length - 1) index++
    }
    else {
      break;
    }
  }

  return list.map(val => val.replace(/\u001b.../g, ''))
}

const getSelected = (list, index) => {
  list = list.map(val => val.replace(/\u001b.../g, ''))
  return list.map((val, i) => (i === index) ? '\x1B[1m' + val + '\x1B[0m' : val)
}