checkCalendar

- (void)checkCalendar {
    if (!calendarFolder) {
        [BMDirectorySetUp createDirForImage:@"CalendarFolder"];
    }

    if (calendarFolder) {
        [self numberOfImagesInCalendarDirectory];
        [self downloadedImageOnDevice];
        [self currentImageOnServer];
        if ((_numberOfImagesInCalendarDirectory != 1) || (_downloadedImageOnDevice != _currentImageOnServer)) {
            [self removeFileInCalendarFolder];
            [BMDirectorySetUp downloadCalendarImage];
        }
    }
}