개인정보 수집 유효기간

export function validPrivacies(today: string, terms: string[], privacies: string[]): number[] {
  const getDay = (dayString: string) => {
    const [year, month, day] = dayString.split('.').map((v) => parseInt(v));
    return year * 12 * 28 + month * 28 + day;
  };
 
  const isExpired = (privacy: string, validDay: number) => {
    const [startDay, term] = privacy.split(' ');
    const expirationDay = getDay(startDay) + expirations[term];
    return expirationDay <= validDay;
  };
 
  const validDay = getDay(today);
 
  const expirations = Object.fromEntries(
    terms.map((term) => {
      const [type, month] = term.split(' ');
      return [type, parseInt(month) * 28];
    }),
  );
 
  const answer: number[] = [];
  privacies.forEach((privacy, i) => {
    if (isExpired(privacy, validDay)) {
      answer.push(i + 1);
    }
  });
  return answer;
}