Google Apps Scriptを使用し1ヶ月分のバイオリズムをGoogleカレンダーに登録します。トリガーで毎月月初で登録をする想定で実装。冪等性があり、複数回実行した場合も重複は有りません。 This script calculates biorhythms based on a given birthday and adds them as events to a specified Google Calendar. Each event's title includes the biorhythm type and its value. It is designed to run on the 1st of every month and is idempotent, me…

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/**
 * This script calculates biorhythms based on a given birthday and adds them as events
 * to a specified Google Calendar. Each event's title includes the biorhythm type and its value.
 * It is designed to run on the 1st of every month and is idempotent, meaning it can run
 * multiple times a month without causing duplicate entries. It deletes any existing biorhythm
 * events for the month before adding new ones.
 * 
 * Cycles:
 * - Physical: 23 days
 * - Emotional: 28 days
 * - Intellectual: 33 days
 */

/**
 * Main function to run the script.
 */
const main = () => {
  const BIRTHDAY = new Date('1990-08-23'); // Set the birthday
  const CALENDAR_ID = 'YOUR_CALENDAR_ID@group.calendar.google.com'; // Your calendar ID
  const calendar = CalendarApp.getCalendarById(CALENDAR_ID);
  const today = new Date();
  const startDate = new Date(today.getFullYear(), today.getMonth(), 1);

  if (!calendar) {
    console.error('Calendar not found');
    return;
  }

  processMonthBiorhythms(startDate, calendar, BIRTHDAY);
  console.log('Biorhythm events for the month have been updated in the calendar.');
};

/**
 * Calculates the biorhythm index for a given day using the sine function.
 * 
 * @param {number} days - The number of days elapsed since the start date.
 * @param {number} cycle - The cycle period of the biorhythm.
 * @return {number} The biorhythm index for the day.
 */
const calculateIndex = (days, cycle) => {
  return Math.sin(2 * Math.PI * days / cycle);
};

/**
 * Calculates the number of days between two dates.
 * 
 * @param {Date} startDate - The start date.
 * @param {Date} endDate - The end date.
 * @return {number} The number of days between the two dates.
 */
const calculateDaysBetween = (startDate, endDate) => {
  const msPerDay = 1000 * 3600 * 24;
  return Math.round((endDate - startDate) / msPerDay);
};

/**
 * Deletes all biorhythm events for a given month.
 * 
 * @param {GoogleAppsScript.Calendar.Calendar} calendar - The calendar from which to delete events.
 * @param {Date} startDate - The start date of the month.
 * @param {Date} endDate - The end date of the month.
 */
const deleteExistingEvents = (calendar, startDate, endDate) => {
  const events = calendar.getEvents(startDate, endDate);
  events.forEach(event => {
    if (event.getTitle().startsWith('Biorhythm')) {
      event.deleteEvent();
    }
  });
};

/**
 * Adds a biorhythm event to the calendar for a specific date.
 * 
 * @param {GoogleAppsScript.Calendar.Calendar} calendar - The calendar to add events to.
 * @param {string} type - The type of biorhythm ('physical', 'emotional', 'intellectual').
 * @param {number} index - The biorhythm index for the day.
 * @param {Date} date - The date for which the event is being added.
 */
const addBiorhythmEvent = (calendar, type, index, date) => {
  const title = `Biorhythm ${type.charAt(0).toUpperCase() + type.slice(1)}: ${index.toFixed(2)}`;
  const description = `Daily ${type} state index.`;
  calendar.createAllDayEvent(title, date, {description: description});
};

/**
 * Processes biorhythm data for a month and adds events to the calendar.
 * 
 * @param {Date} startDate - The start date to process biorhythms from.
 * @param {GoogleAppsScript.Calendar.Calendar} calendar - The calendar to add events to.
 * @param {Date} birthday - The birthdate used for biorhythm calculations.
 */
const processMonthBiorhythms = (startDate, calendar, birthday) => {
  const daysSinceBirth = calculateDaysBetween(birthday, startDate);
  const endDate = new Date(startDate.getFullYear(), startDate.getMonth() + 1, 0);
  deleteExistingEvents(calendar, startDate, endDate);
  const totalDays = calculateDaysBetween(startDate, endDate) + 1;
  const cycles = { physical: 23, emotional: 28, intellectual: 33 };

  for (let day = 0; day < totalDays; day++) {
    const currentDate = new Date(startDate);
    currentDate.setDate(startDate.getDate() + day);
    Object.keys(cycles).forEach(type => {
      const cycle = cycles[type];
      const index = calculateIndex(daysSinceBirth + day, cycle);
      addBiorhythmEvent(calendar, type, index, currentDate);
    });
  }
};