calender_merge.gs

//まとめる先のカレンダーのIDを設定
var outCal_id = "~~~";
//まとめたいカレンダーのIDを設定
var inCal_ids = [
    "~~~",
    "~~~",
    "~~~" ];
function main(){

    var month = 4;  
    var date_start = new Date();
    var date_end = new Date;
    date_end.setTime(date_start.getTime() + month*30*24*60*60*1000);
    var outCal = CalendarApp.getCalendarById(outCal_id);
    var old_Future_Ev = outCal.getEvents(date_start,date_end);
    for(var i = 0; i < old_Future_Ev.length;i++){
	old_Future_Ev[i].deleteEvent();
    }	     
    for(var i = 0; i < inCal_ids.length; i++){
	mergeCal(outCal, inCal_ids[i], date_start, date_end);
    }
}
function mergeCal(outCal, inCal_id, date_start, date_end) {
    var inCal = CalendarApp.getCalendarById(inCal_id);
    var new_Future_Ev = inCal.getEvents(date_start,date_end);
    for(var i = 0; i < new_Future_Ev.length;i++){
	Utilities.sleep(1);
	if(new_Future_Ev[i].isAllDayEvent()){
	    outCal.createAllDayEvent("<" + inCal.getName() + ">" + new_Future_Ev[i].getTitle(),
	    new_Future_Ev[i].getStartTime(),
	    new_Future_Ev[i].getEndTime(), 
	    {description:new_Future_Ev[i].getDescription(),
	     location:new_Future_Ev[i].getLocation()});
	}else{
	    outCal.createEvent("<" + inCal.getName() + ">" + new_Future_Ev[i].getTitle(),
	    new_Future_Ev[i].getStartTime(),
	    new_Future_Ev[i].getEndTime(),
	    {description:new_Future_Ev[i].getDescription(),
	     location:new_Future_Ev[i].getLocation()});
	}
    }
}