Googleカレンダーの予定を開始15分前とか1時間前にLINEで通知する方法【Google Apps Script】

// Lineに通知する ------------------------------//
function send(content) {
  const token = "★LINE Notifyのトークン★";
  const options = {
    "method" : "post",
    "payload" : "message=" + content,
    "headers" : {"authorization" : "Bearer " + token}
  }

  UrlFetchApp.fetch("https://notify-api.line.me/api/notify", options)
}

// カレンダーの予定取得 ------------------------------//
function fetchCalendar() {
 
  // 取得間隔
  const minutes = 60;
  const startTime = new Date();
  const endTime = new Date(Date.parse(startTime) + (1000 * 60 * minutes));

  //取得
  const calendar = CalendarApp.getDefaultCalendar();
  const events = calendar.getEvents(startTime, endTime);

  const value = [];

  for(const event of events) {
    // 要素を取得
    const eventStart =event.getStartTime();
    const eventEnd =event.getEndTime();
    const title = event.getTitle();
    const location = event.getLocation();
    const desc = event.getDescription();
    
    // 告知時間の調整
    const checkTime = (event.getStartTime() - startTime) / 1000 / 60;
    const timeToStartArray = [60, 15]; 
    
    // 整形
    function shape(timeToStart) {
      const eventStartTime = eventStart.getMonth() + '月' +eventStart.getDate() + '日 ' 
                      + eventStart.getHours() + '時' +  (("00" + eventStart.getMinutes()).slice(-2))　+ '分';
      const eventEndTime = eventEnd.getMonth() + '月' +eventEnd.getDate() + '日 ' 
                      + eventEnd.getHours() + '時' +  (("00" + eventEnd.getMinutes()).slice(-2)) + '分';
      const locationCheck = location ? "▼場所\n" + location  + "\n\n" : "";
      const descCheck = desc ? "▼詳細\n" + desc : "";

      const detail =  "\n"
        + "開始「" + timeToStart + "分前」です！\n\n"
        + "▼予定\n" + title + "\n\n"
        + "開始: " + eventStartTime + "\n"
        + "終了: " + eventEndTime + "\n\n"
        + locationCheck
        + descCheck;

      value.push(detail);
    }
    
    // 条件に当てはまる予定の取得
    for(const i in timeToStartArray) {
      if(checkTime <= timeToStartArray[i] && checkTime > (timeToStartArray[i] - 1)) {
        const timeToStart = timeToStartArray[i]
        shape(timeToStart);
      }
    }
  }

  return value;
}

// 予定の確認とLINEへの通知処理 ------------------------------//
function checkCalendar() {
  const result = fetchCalendar()

  if(result.length > 0){
    for(const i in result) {
      send(result[i]);
    }
  }
}

// 取得間隔
const minutes = 60;
const startTime = new Date();
const endTime = new Date(Date.parse(startTime) + (1000 * 60 * minutes));

// 告知時間の調整
const checkTime = (event.getStartTime() - startTime) / 1000 / 60;
const timeToStartArray = [60, 15]; 

// 整形
function shape(timeToStart) {
const eventStartTime = eventStart.getMonth() + '月' +eventStart.getDate() + '日 ' 
                     + eventStart.getHours() + '時' +  (("00" + eventStart.getMinutes()).slice(-2))　+ '分';
const eventEndTime = eventEnd.getMonth() + '月' +eventEnd.getDate() + '日 ' 
                   + eventEnd.getHours() + '時' +  (("00" + eventEnd.getMinutes()).slice(-2)) + '分';
const locationCheck = location ? "▼場所\n" + location  + "\n\n" : "";
const descCheck = desc ? "▼詳細\n" + desc : "";

const detail =  "\n"
        + "開始「" + timeToStart + "分前」です！\n\n"
        + "▼予定\n" + title + "\n\n"
        + "開始: " + eventStartTime + "\n"
        + "終了: " + eventEndTime + "\n\n"
        + locationCheck
        + descCheck;

value.push(detail);
}