Import events from one calendar into another

apps-script.gs

function sync() {
    var id = "ericchansen@gmail.com";
    var today = new Date();
    var endDate = new Date();
    endDate.setDate(today.getDate() + 7);
    var secondaryCal = CalendarApp.getCalendarById(id);
    var secondaryEvents = secondaryCal.getEvents(today, endDate);
    var primaryCal = CalendarApp.getDefaultCalendar();
    var primaryEvents = primaryCal.getEvents(today, endDate);
    var primaryEventTitle = "Personal Appointment";
    var stat = 1;
    var evi, existingEvent;
    var primaryEventsFiltered = [];
    var primaryEventsUpdated = [];
    var primaryEventsCreated = [];
    var primaryEventsDeleted = [];
    Logger.log('Number of primaryEvents: ' + primaryEvents.length);
    Logger.log('Number of secondaryEvents: ' + secondaryEvents.length);
    for (pev in primaryEvents) {
        var pEvent = primaryEvents[pev];
        if (pEvent.getTitle() == primaryEventTitle) { primaryEventsFiltered.push(pEvent); }
    }
    for (sev in secondaryEvents) {
        stat = 1;
        evi = secondaryEvents[sev];
        for (existingEvent in primaryEventsFiltered) {
            var pEvent = primaryEventsFiltered[existingEvent];
            var secondaryTitle = evi.getTitle();
            var secondaryDesc = evi.getDescription();
            if ((pEvent.getStartTime().getTime() == evi.getStartTime().getTime()) && (pEvent.getEndTime().getTime() == evi.getEndTime().getTime())) {
                stat = 0;
                pEvent.setTitle(primaryEventTitle);
                pEvent.setDescription(secondaryTitle + '\n\n' + secondaryDesc);
                // event.setDescription(evi.getTitle() + '\n\n' + evi.getDescription());  // Not sure what this was for.
                pEvent.setVisibility(CalendarApp.Visibility.PRIVATE);
                primaryEventsUpdated.push(pEvent.getId());
                Logger.log('PRIMARY EVENT UPDATED'
                    + '\nprimaryId: ' + pEvent.getId() + ' \nprimaryTitle: ' + pEvent.getTitle() + ' \nprimaryDescription: ' + pEvent.getDescription());
            }
        }
        if (stat == 0) continue;
        var eviStartTime = evi.getStartTime();
        var eviDay = eviStartTime.getDay();
        if (evi.isAllDayEvent()) {
            continue;
        }
        //   else if (eviDay==1 || eviDay==2 || eviDay==3 || eviDay==4 || eviDay==5)  // Uncomment for only weekday (no weekends) sync.
        else {
            var newEvent = primaryCal.createEvent(primaryEventTitle, evi.getStartTime(), evi.getEndTime());
            // var newEvent = primaryCal.createEvent(evi.getTitle(), evi.getStartTime(), evi.getEndTime(), {location: evi.getLocation(), description: evi.getDescription()});  // Uncomment for full event details.
            // newEvent.setDescription(evi.getTitle() + '\n\n' + evi.getDescription());  // Uncomment to add a description.
            newEvent.setVisibility(CalendarApp.Visibility.PRIVATE);
            // newEvent.removeAllReminders();  // Uncomment if you don't want reminders for these imported events.
            primaryEventsCreated.push(newEvent.getId());
            Logger.log('PRIMARY EVENT CREATED'
                + '\nprimaryId: ' + newEvent.getId() + '\nprimaryTitle: ' + newEvent.getTitle() + '\nprimaryDescription: ' + newEvent.getDescription() + '\n');
        }
    }
    for (pev in primaryEventsFiltered) {
        var pevIsUpdatedIndex = primaryEventsUpdated.indexOf(primaryEventsFiltered[pev].getId());
        if (pevIsUpdatedIndex == -1) {
            var pevIdToDelete = primaryEventsFiltered[pev].getId();
            Logger.log(pevIdToDelete + ' deleted');
            primaryEventsDeleted.push(pevIdToDelete);
            primaryEventsFiltered[pev].deleteEvent();
        }
    }
    Logger.log('Primary events previously created: ' + primaryEventsFiltered.length);
    Logger.log('Primary events updated: ' + primaryEventsUpdated.length);
    Logger.log('Primary events deleted: ' + primaryEventsDeleted.length);
    Logger.log('Primary events created: ' + primaryEventsCreated.length);
}