01. Activation Keys js exam

function solve(args) {
  let rawKey = args.shift();


  let inputLine = args.shift();

  while (inputLine !== 'Generate') {
    const [command, arg1, arg2, arg3] = inputLine.split('>>>');


    switch (command) {
      case 'Contains':
        if (rawKey.includes(arg1)) {
          console.log(`${rawKey} contains ${arg1}`);
        } else {
          console.log('Substring not found!');
        }
        break;
      case 'Flip':

        const beginIndex = Number(arg2);
        const endIndex = Number(arg3);
        const sliceStr = rawKey.slice(beginIndex, endIndex);

        if (arg1 === 'Upper') {
          rawKey = rawKey.slice(0, beginIndex) + sliceStr.toUpperCase() + rawKey.slice(endIndex);
          console.log(rawKey)
        } else if (arg1 === 'Lower') {
          rawKey = rawKey.slice(0, beginIndex) + sliceStr.toLowerCase() + rawKey.slice(endIndex);
          console.log(rawKey)
        }


        break;
      case 'Slice':
        const bIndex = Number(arg1);
        const eIndex = Number(arg2);
        rawKey.slice(bIndex, eIndex);
        rawKey = rawKey.slice(0, bIndex) + rawKey.slice(eIndex);
        console.log(rawKey)
        break;

      default:
        break;
    }


    inputLine = args.shift();
  }

  console.log(`Your activation key is: ${rawKey}`);
}