シンプルなGASでGoogleCalendarからNotionに予定同期

const database_id = "xxxxxxxxxxxxxx";
const token = "secret_xxxxxxxxxxxxxxxxxxxxx";


function myFunction() {
  var nDaysFromNow = [0,1,2,3,4,5,6,7]
  for (n of nDaysFromNow) {
    var results = getCalendar(n)
    if (results != null) {
      for (r of results) {
        createIdea(r.title, r.start, r.end);
      }
    }
  }
}

function getCalendar(nDaysFromNow) {
  const calendar = CalendarApp.getCalendarById('xxxxxxxx@gmail.com');
  const today = new Date();
  const d = new Date(new Date().setDate(today.getDate() + nDaysFromNow));
  const events = calendar.getEventsForDay(d);
  if (events.length === 0) {
    console.log("No events found.");
    return null;
  } else {
    var results = [];
    for (event in events) {
      results.push({
        "title": events[event].getTitle(),
        "start": events[event].getStartTime().toISOString(),
        "end": events[event].getEndTime().toISOString()
      })
    }
    return results
  }
}


function createIdea(title, start, end) {
  const url = 'https://api.notion.com/v1/pages';
  let headers = {
    'content-type' : 'application/json; charset=UTF-8',
    'Authorization': 'Bearer ' + token,
    'Notion-Version': '2021-08-16',
  };
  let payload = {
      'parent': { 'database_id': database_id },
      'icon': {
        'type': "emoji",
        'emoji': "🗓"
    	},
      'properties': {
        'title': { 
          'title':[
            {
              "text": {
                "content": title
              }
            }
          ]
        },
        'by_GAS_gcalSync': {
          'checkbox': true
        },
        'Date': {
          'date': {
            'start': start,
            'end': end,
          }
        },
      },
    };
  let options ={
    'method': 'post',
    'headers': headers,
    'payload': JSON.stringify(payload),
  }

  let notion_data = UrlFetchApp.fetch(url, options);
  notion_data = JSON.parse(notion_data);
  return notion_data;
}