GASでNUCTのスケジュールをタスクに変換する

function henkan(today) {
  //Tue Apr 13 2021 19:00:00 GMT+0900(Japan Standard Time)となっている日時をRFC3339方式（2021-04-13T19:00:00_00.000+0900)に変換
  timex = Utilities.formatDate(today, "JST", "HH:mm:ss")
  datex = Utilities.formatDate(today, "JST", "yyyy-MM-dd")
  hiduke = datex + "T" + timex + ".000+09:00"
  return hiduke
}
function Getnow() {
  var d = new Date()
  var y = d.getFullYear()
  var mon = d.getMonth() + 1
  var d2 = d.getDate()
  var h = d.getHours()
  var min = d.getMinutes()
  var s = d.getSeconds()
  var now = y + "/" + mon + "/" + d2 + " " + h + ":" + min + ":" + s
  return now
}
function setup() {
  //初期状態を作るために使う
  CalendarApp.getDefaultCalendar()
  const calendarId = cID()
  const calendar = CalendarApp.getCalendarById(calendarId)
  const taskListId = tID()
  const startdate = new Date("2021/5/9") //カレンダーのイベントを読み込み始める日付
  const enddate = new Date("2029/12/31")
  const events = calendar.getEvents(startdate, enddate)
  for (const event of events) {
    let titleEvent = event.getTitle()
    let description = event.getDescription()
    let shimekiri = henkan(event.getEndTime())
    var task = {
      title: titleEvent, //  タイトル
      notes: description, // メモ
      due: shimekiri, // 締切日。日付のフォーマットはRFC3339に準拠
    }
    task = Tasks.Tasks.insert(task, taskListId)
    Logger.log("新しいタスクのID：" + task.id)
  }
  const sheet = SpreadsheetApp.getActiveSheet()
  const cell = sheet.getRange(sheet.getLastRow() + 1, 1)
  cell.setValue(Getnow())
}

function getTaskLists() {
  var taskLists = Tasks.Tasklists.list().getItems()
  if (!taskLists) {
    return []
  }
  return taskLists.map(function (taskList) {
    return {
      id: taskList.getId(),
      name: taskList.getTitle(),
    }
  })
}
function viewAllList() {
  var myTaskLists = getTaskLists()
  let i = 0
  for (const j of myTaskLists) {
    Logger.log(myTaskLists[i].id)
    Logger.log(myTaskLists[i].name)
    i++
  }
}
function callListTasks() {
  const myTaskListId = listTaskLists()
  listTasks(myTaskListId)
}
function listTaskLists() {
  //タスクリストのidと名前を返す
  let taskLists = Tasks.Tasklists.list()
  if (taskLists.items) {
    let peach = [[], []]
    Logger.log(taskLists.items.length)
    for (let i = 0; i < taskLists.items.length; i++) {
      let taskList = taskLists.items[i]
      peach[i] = [taskList.id, taskList.title]
    }
    return peach
  } else {
    Logger.log("Sorry, No task lists found.")
    return "none"
  }
}
function listTasks(taskListId) {
  //あるタスクリストの中のタスクの一覧を返す
  let tasks = Tasks.Tasks.list(taskListId)
  if (tasks.items) {
    console.log(tasks.items.length)
    let taskReturn = []
    for (let i = 0; i < tasks.items.length; i++) {
      let task = tasks.items[i]
      taskReturn[i] = task.title
    }
    return taskReturn
  } else {
    Logger.log("Sorry, No tasks found.")
    return "none"
  }
}
function view() {
  array = listTaskLists()
  let j = 0
  for (i of array) {
    Logger.log(listTasks(array[j][0]))
    j++
  }
}
function viewAllListInSheet() {
  const sheet = SpreadsheetApp.getActiveSheet()
  var myTaskLists = getTaskLists()
  let i = 0
  for (const j of myTaskLists) {
    let cell = sheet.getRange(i + 1, 6)
    cell.setValue(myTaskLists[i].id)
    cell = sheet.getRange(i + 1, 7)
    cell.setValue(myTaskLists[i].name)
    i++
  }
}

function update() {
  CalendarApp.getDefaultCalendar()
  const sheet = SpreadsheetApp.getActiveSheet()
  const calendarId = cID()
  const calendar = CalendarApp.getCalendarById(calendarId)
  const taskListId = tID()
  const startdate = new Date("2021/5/1")
  const enddate = new Date("2030/12/31")
  const events = calendar.getEvents(startdate, enddate)
  const cell = sheet.getRange(sheet.getLastRow(), 1)
  let lastUpdate = new Date(cell.getValue())
  lastUpdate = lastUpdate.getTime()
  for (const event of events) {
    console.log(event.getTitle() + ":" + event.getDateCreated())
    let whenNewEvent = event.getDateCreated().getTime()
    //この判定方法やめた方がいいんかな
    //ある予定が作成された日時と最終更新日時を比べて、追加するようにしている
    let bool = lastUpdate < whenNewEvent
    if (bool == true) {
      let titleEvent = event.getTitle()
      let description = event.getDescription()
      let shimekiri = henkan(event.getEndTime())
      var task = {
        title: titleEvent, //  タイトル
        notes: description + "from update script", // いらんかったら消してね
        due: shimekiri, // 締切日。日付のフォーマットはRFC3339に準拠
      }
      //コンソールに書き出す
      task = Tasks.Tasks.insert(task, taskListId)
      Logger.log("新しいタスクのID：" + task.id)
      //スプレッドシートに更新日時を書き足す
      const cell = sheet.getRange(sheet.getLastRow() + 1, sheet.getLastColumn())
      cell.setValue(Getnow())
    }
  }
}

function tID() {
  const sheet = SpreadsheetApp.getActiveSheet()
  let cell = sheet.getRange("B1")
  let tID = cell.getValue()
  return tID
}
function cID() {
  const sheet = SpreadsheetApp.getActiveSheet()
  let cell = sheet.getRange("B2")
  let cID = cell.getValue()
  return cID
}