ゴミ収集日のリマインダーを作る。

//https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global*Objects/Array/from
const range = (start, stop, step) => Array.from({ length: (stop - start) / step + 1}, (*, i) => start + (i * step))
const weeks = \["日","月","火","水","木","金","土"]
const NOTIFICATION_HOUR = 7
const NOTIFICATION_MINUTES = 30
const PopupReminderTheDayBefore = 720 // 12時間前
let props = PropertiesService.getScriptProperties()
const CALENDAR_ID = props.getProperty('CALENDAR_ID')

function main(){
  let calendars = getDustCalendars()
  for(let \[name,value] of Object.entries(calendars)) {
    Logger.log(name)
    Logger.log(value)
    let calendar = CalendarApp.getCalendarById(CALENDAR_ID)

  value.map(date=>{
    // 開始時刻
    let startDate = new Date(date)
    // 終了時刻
    date.setHours(NOTIFICATION_HOUR+1)
    let endDate = new Date(date)

    if (startDate < new Date()) return
    // 既に登録済みなら終了
    let events = calendar.getEvents(startDate, endDate)
  
    for(var i=0; i<events.length; i++) {
      if (events[i].getTitle() === '[ゴミカレンダー] '+name) {
        return
      }
    }

    let event = calendar.createEvent("[ゴミカレンダー] "+name,startDate,endDate)
    event.setDescription("ゴミカレンダー")
    event.addPopupReminder(5)
    event.addPopupReminder(30)
    event.addPopupReminder(720)
    Logger.log('Event ID: ' + event.getId())
  })
  Utilities.sleep(2000)
  }
}

function deleteCalendars()
{
  let calendars = getDustCalendars()
  for(let \[name,value] of Object.entries(calendars)) {
    Logger.log(name)
    Logger.log(value)
    let calendar = CalendarApp.getCalendarById(CALENDAR_ID)

    value.map(date=>{
      // 開始時刻
      let startDate = new Date(date)
      // 終了時刻
      date.setHours(NOTIFICATION_HOUR+1)
      let endDate = new Date(date)

      // 既に登録済みなら削除
      let events = calendar.getEvents(startDate, endDate)
  
      for(var i=0; i<events.length; i++) {
        if (events[i].getTitle() === '[ゴミカレンダー] '+name) {
          events[i].deleteEvent()
          return
        }
      }
    })
  }
}

// ゴミの種類ごとにゴミ収集日をDate形式で返す
function getDustCalendars() {
  let month = generateMonthMatrixFromToday()
  // definition.json.gsを読み込む
  let def = getJsonForDustCalendar()\[0]

  let dustCalendars = {}
  for(key in def){
    // ゴミの種類ごとに取得する
    let result = def\[key].map(confing=>{
      // 曜日に対応する日の配列を取得する
      let datesFromdayOfWeek = month\[weeks.indexOf(confing.dayOfWeek)]
      // timingに指定された数だけ取得する
      return confing.timing.map(_timing=>{
        // x週目の日付を取得
        return datesFromdayOfWeek.slice(_timing-1,_timing)\[0]
      }).filter(v=>v)
    }).flat().sort((a,b)=>a-b)
    // ゴミの種類ごとにゴミ収集日をDateで保存する
    dustCalendars\[key] = result.map(v=>{
      let date = new Date()
      date.setDate(v)
      date.setHours(NOTIFICATION_HOUR)
      date.setMinutes(NOTIFICATION_MINUTES)
      date.setSeconds(0)
      return new Date(date)
    })
  }
  return dustCalendars
}

function generateMonthMatrixFromToday()
{
  let month = {} 
  let date = new Date()
  const firstDate = getFirstDate(date)
  const days = getLastDate(date).getDate()
  const weekOfDay = firstDate.getDay()

  // 初日の曜日から順番に日付を求めていく
  let _weekOfDay = weekOfDay
  for(let d=1;d<=7;d++) {
    month\[_weekOfDay] = getDateFromWeekOfDays(d, days)
    _weekOfDay += 1
    _weekOfDay = _weekOfDay%7
  } 
  return month
}

// その指定された日のn週間後の日付を月末まで求めて配列で返す
function getDateFromWeekOfDays(numberOfFirstDate,daysOfMonth)
{
  return range(numberOfFirstDate,daysOfMonth,7)
}

// 月初の日付を生成
function getFirstDate(date)
{
  date.setDate(1)
  return new Date(date)
}

// 月末の日付を生成
function getLastDate(date)
{
  date.setMonth(date.getMonth()+1)
  date.setDate(1)
  date.setDate(date.getDate()-1)
  return new Date(date)
}