gmailのメール本文から自動でカレンダーに追加しよう

function createReservationEvents() {
  const reservationThreads = GmailApp.search('subject:("予約内容の確認") newer_than:1D');
  Logger.log(reservationThreads);

  const eventName = "Reservation Details";

  for (const thread of reservationThreads) {
    Logger.log(thread);

    const messages = thread.getMessages();
    Logger.log(messages);

    const message = messages[0];
    const mailBody = message.getPlainBody();

    console.log(mailBody);

    const currentDate = new Date();
    const currentYear = currentDate.getFullYear();

    const monthMatch = mailBody.match(/[0-9]{1,2}月/gi);
    const month = monthMatch ? monthMatch[0].replace('月', '') : null;

    const dayOfMonthMatch = mailBody.match(/[0-9]{1,2}日/gi);
    const dayOfMonth = dayOfMonthMatch ? dayOfMonthMatch[0].replace('日', '') : null;

    const startTimeHourMatch = mailBody.match(/([01][0-9]|2[0-3]):/gi);
    const startTimeHour = startTimeHourMatch ? startTimeHourMatch[0].replace(':', '') : null;

    const startTimeMinuteMatch = mailBody.match(/:[0-5][0-9]/gi);
    const startTimeMinute = startTimeMinuteMatch ? startTimeMinuteMatch[0].replace(':', '') : null;

    console.log(currentYear, month, dayOfMonth, startTimeHour, startTimeMinute);

    createEvent(eventName, mailBody, currentYear, month, dayOfMonth, startTimeHour, startTimeMinute,
      parseInt(startTimeHour) + 1, startTimeMinute);
  }
}

function createEvent(title, description, year, month, dayOfMonth,
  startTimeHour, startTimeMinutes, endTimeHour, endTimeMinutes) {

  const calendar = CalendarApp.getDefaultCalendar();
  const startTime = new Date(year, month - 1, dayOfMonth, startTimeHour, startTimeMinutes, 0);
  const endTime = new Date(year, month - 1, dayOfMonth, endTimeHour, endTimeMinutes, 0);
  const eventOptions = {
    description: description
  };

  console.log("Start Time: " + startTime);
  console.log("End Time: " + endTime);

  calendar.createEvent(title, startTime, endTime, eventOptions);
}