- (void)addLoginItem:(BOOL)status
{
    NSURL *url = [[[NSBundle mainBundle] bundleURL] URLByAppendingPathComponent:
                  @"Contents/Library/LoginItems/HelperApp.app"];

    // Registering helper app
    if (LSRegisterURL((__bridge CFURLRef)url, true) != noErr) {
        NSLog(@"LSRegisterURL failed!");
    }

    if (!SMLoginItemSetEnabled((__bridge CFStringRef)[[NSBundle mainBundle] bundleIdentifier], (status) ? true : false)) {
        NSLog(@"SMLoginItemSetEnabled failed!");
        [self willChangeValueForKey:@"startAtLogin"];
        [self.startAtLogin setValue:[NSNumber numberWithBool:[self automaticStartup]] forKey:@"state"];
        [self didChangeValueForKey:@"startAtLogin"];
    }
}

- (void)setAutomaticStartup:(BOOL)state
{
    NSLog(@"Set automatic startup: %d", state);
    if ([self respondsToSelector:@selector(addLoginItem:)]) {
        [self addLoginItem:state];
    }
}

- (BOOL)automaticStartup
{

    BOOL isEnabled  = NO;

    // the easy and sane method (SMJobCopyDictionary) can pose problems when sandboxed. -_-
    CFArrayRef cfJobDicts = SMCopyAllJobDictionaries(kSMDomainUserLaunchd);
    NSArray* jobDicts = CFBridgingRelease(cfJobDicts);

    if (jobDicts && [jobDicts count] > 0) {
        for (NSDictionary* job in jobDicts) {
            if ([[[NSBundle mainBundle] bundleIdentifier] isEqualToString:[job objectForKey:@"Label"]]) {
                isEnabled = [[job objectForKey:@"OnDemand"] boolValue];
                break;
            }
        }
    }
    NSLog(@"Is Enabled: %d", isEnabled);
//    if (isEnabled != _enabled) {
    [self willChangeValueForKey:@"startupEnabled"];
        startupEnabled = isEnabled;
    [self didChangeValueForKey:@"startupEnabled"];
//    }

    return isEnabled;
}