04. Star Enigma js fundamentals

function solve(args) {
  const [, ...msgArr] = args;
  const rePat = /[@]{1}(?<name>[a-z]+)[^@\-!:>]*[:]{1}(?<population>[0-9]+)[^@\-!:>]*[!]{1}(?<typeAttack>[A|D])[!]{1}[^@\-!:>]*->(?<soldierCount>[0-9]+)/gi;

  const attackedPlanets = [];
  const destroyedPlanets = [];

  msgArr.forEach((line) => {
    const counterLet = line
      .split('')
      .map((x) => x.toLowerCase())
      .filter((x) => (x === 's' || x === 't' || x === 'a' || x === 'r'))
      .length;
    const decriptedMsg = line.split('').map((elem) => String.fromCharCode(elem.charCodeAt() - counterLet)).join('');
    if (decriptedMsg.match(rePat)) {
      const currentPlanet = rePat.exec(decriptedMsg);
      if (currentPlanet.groups.typeAttack === 'A') {
        attackedPlanets.push(currentPlanet.groups.name);
      } else if (currentPlanet.groups.typeAttack === 'D') {
        destroyedPlanets.push(currentPlanet.groups.name);
      }
    }
  });


  console.log(`Attacked planets: ${attackedPlanets.length}`);
  if (attackedPlanets !== 0) {
    attackedPlanets
      .sort((a, b) => a.localeCompare(b))
      .forEach((planet) => console.log(`-> ${planet}`));
  }

  console.log(`Destroyed planets: ${destroyedPlanets.length}`);
  if (destroyedPlanets !== 0) {
    destroyedPlanets
      .sort((a, b) => a.localeCompare(b))
      .forEach((planet) => console.log(`-> ${planet}`));
  }
}