/// <summary>
/// Tries to create a new calendar with the specified source/name/color.
/// May fail depending on source.
/// </summary>
/// <remarks>
/// This is only intended as a helper method for CreateEKCalendar,
/// not to be called independently.
/// </remarks>
/// <returns>The created native calendar, or null on failure</returns>
/// <param name="source">Calendar source (e.g. iCloud vs local vs gmail)</param>
/// <param name="calendarName">Calendar name.</param>
/// <param name="color">Calendar color.</param>
private static EKCalendar SaveEKCalendar(EKSource source, string calendarName, string color = null)
{
var calendar = EKCalendar.Create(EKEntityType.Event, _eventStore);
// Setup calendar to be inserted
//
calendar.Title = calendarName;
if (!string.IsNullOrEmpty(color))
{
calendar.CGColor = ColorConversion.ToCGColor(color);
}
calendar.Source = source;
if (_eventStore.SaveCalendar(calendar, true, out NSError error))
{
xLog.Debug($"Successfully saved calendar with source {source.Title}");
// TODO: Should we try calling GetCalendars to make sure that
// the calendar isn't hidden??
//
return(calendar);
}
else
{
xLog.Debug($"Tried and failed to save calendar with source {source.Title}");
}
_eventStore.Reset();
return(null);
}
/// <summary>
/// Creates a new calendar or updates the name and color of an existing one.
/// If a new calendar was created, the ExternalID property will be set on the Calendar object,
/// to support future queries/updates.
/// </summary>
/// <param name="calendar">The calendar to create/update</param>
/// <exception cref="System.ArgumentException">Calendar does not exist on device or is read-only</exception>
/// <exception cref="System.UnauthorizedAccessException">Calendar access denied</exception>
/// <exception cref="System.InvalidOperationException">No active calendar sources available to create calendar on.</exception>
/// <exception cref="Plugin.Calendars.Abstractions.PlatformException">Unexpected platform-specific error</exception>
public static async Task AddOrUpdateCalendarAsync(Calendar calendar)
{
await RequestCalendarAccess().ConfigureAwait(false);
EKCalendar deviceCalendar = null;
if (!string.IsNullOrEmpty(calendar.ExternalID))
{
deviceCalendar = _eventStore.GetCalendar(calendar.ExternalID);
if (deviceCalendar == null)
{
throw new ArgumentException("Specified calendar does not exist on device", nameof(calendar));
}
}
if (deviceCalendar == null)
{
deviceCalendar = CreateEKCalendar(calendar.Name, calendar.Color);
calendar.ExternalID = deviceCalendar.CalendarIdentifier;
// Update color in case iOS assigned one
if (deviceCalendar?.CGColor != null)
{
calendar.Color = ColorConversion.ToHexColor(deviceCalendar.CGColor);
}
}
else
{
deviceCalendar.Title = calendar.Name;
if (!string.IsNullOrEmpty(calendar.Color))
{
deviceCalendar.CGColor = ColorConversion.ToCGColor(calendar.Color);
}
if (!_eventStore.SaveCalendar(deviceCalendar, true, out NSError error))
{
// Without this, the eventStore will continue to return the "updated"
// calendar even though the save failed!
// (this obviously also resets any other changes, but since we own the eventStore
// we can be pretty confident that won't be an issue)
//
_eventStore.Reset();
if (error.Domain == _ekErrorDomain && error.Code == (int)EKErrorCode.CalendarIsImmutable)
{
throw new ArgumentException(error.LocalizedDescription, new NSErrorException(error));
}
else
{
throw new PlatformException(error.LocalizedDescription, new NSErrorException(error));
}
}
}
}