01. Secret Chat js exam

function solve(input) {
  let message = input.shift();

  const commands = (command, firstArgument, secondArgument) => {
    let hasError = false;

    switch (command) {
      case 'InsertSpace':
        message = `${message.substring(0, Number(firstArgument))} ${message.substring(Number(firstArgument))}`;
        break;
      case 'Reverse':
        if (message.includes(firstArgument)) {
          message = message.replace(firstArgument, '');
          let reversedSubstring = '';
          for (const char of firstArgument) {
            reversedSubstring = char + reversedSubstring;
          }
          message += reversedSubstring;
        } else {
          console.log('error');
          hasError = true;
        }
        break;
      case 'ChangeAll':
        while (message.includes(firstArgument)) {
          message = message.replace(firstArgument, secondArgument);
        }
        break;
      default:
    }

    if (!hasError) {
      console.log(message);
    }
  };


  let line = input.shift();
  while (line !== 'Reveal') {
    const [command, firstArgument, secondArgument] = line.split(':|:');


    commands(command, firstArgument, secondArgument);


    line = input.shift();
  }

  console.log(`You have a new text message: ${message}`);
}