parse push notification ex.

+ (void)blurbWasLiked:(PFObject *)blurb byUser:(PFUser *)liker
{
    /*
     Query for blurb's user
     */
    PFQuery *userQuery=[PFUser query];
    PFUser *blurbUser = [blurb objectForKey:@"user"];
    [userQuery whereKey:@"objectId" equalTo:blurbUser.objectId];
    
    /*
     Send push to notification to the blurb's user
     
     First stab it this just finds installation that matches the blurb's user but, the
     blurb's user could have multiple devices, so we should find all installations that
     match the blurb's user.
     */
    PFQuery *pushQuery = [PFInstallation query];
    [pushQuery whereKey:@"user" matchesQuery:userQuery];

    __block PFPush *push = [PFPush new];
    [push setQuery:pushQuery];

    
    PMKPromise *p = [TINParseRead unreadNotificationsCountForUser:[blurb objectForKey:@"user"]];

    p.then(^(NSNumber *count){

        NSString *countStr = [NSString stringWithFormat:@"%@", count];
        NSString *message = [NSString stringWithFormat:@"@%@ liked your blurb, \"%@\"", liker.username, [blurb objectForKey:@"title"]];
        [push setData: @{
                         @"alert":message,
                         @"sound":@"push-notification.aiff",
                         @"badge":countStr
                         }];

        NSError *pushError;
        [push sendPush:&pushError];

    }).catch(^(NSError *error){
        NSLog(@"%@", error.localizedDescription);
    });
}