TGRTimeline.m

- (SLRequest *)requestForNewTweets
{
    NSMutableDictionary *parameters = [NSMutableDictionary dictionary];
    parameters[@"include_rts"] = @"true";
    
    TGRTweet *lastTweet = [TGRTweet lastTweetInManagedObjectContext:self.managedObjectContext];
    
    if (lastTweet) {
        parameters[@"since_id"] = [lastTweet.identifier stringValue];
    }
    
    SLRequest *request = [SLRequest requestForServiceType:SLServiceTypeTwitter
                                            requestMethod:SLRequestMethodGET
                                                      URL:[NSURL URLWithString:kHomeTimelineURL]
                                               parameters:parameters];
    request.account = self.account;
    
    return request;
}