gonzalezreal

- (void)importTweets:(NSArray *)tweets
{
    for (NSDictionary *tweetDictionary in tweets) {
        [TGRTweet importFromDictionary:tweetDictionary inManagedObjectContext:self.managedObjectContext];
    }
    
    NSError *error = nil;
    BOOL succeeded = [self.managedObjectContext save:&error];
    
    if (!succeeded) {

gonzalezreal

- (SLRequest *)requestForOldTweets
{
    TGRTweet *firstTweet = [TGRTweet firstTweetInManagedObjectContext:self.managedObjectContext];
    
    if (!firstTweet) {
        NSLog(@"requestForOldTweets shouldn't be called when the cache is empty");
        return nil;
    }
    
    NSNumber *maxIdentifier = [NSNumber numberWithLongLong:[firstTweet.identifier longLongValue] - 1];

gonzalezreal

- (SLRequest *)requestForNewTweets
{
    NSMutableDictionary *parameters = [NSMutableDictionary dictionary];
    parameters[@"include_rts"] = @"true";
    
    TGRTweet *lastTweet = [TGRTweet lastTweetInManagedObjectContext:self.managedObjectContext];
    
    if (lastTweet) {
        parameters[@"since_id"] = [lastTweet.identifier stringValue];
    }

gonzalezreal

static NSString * const kHomeTimelineURL = @"https://api.twitter.com/1.1/statuses/home_timeline.json";

gonzalezreal

+ (NSDate *)dateFromTwitterDate:(NSString *)dateString
{
    static dispatch_once_t onceToken;
    static NSDateFormatter *dateFormatter;
    
    dispatch_once(&onceToken, ^{
        dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
        [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
        [dateFormatter setDateFormat:@"eee MMM dd HH:mm:ss ZZZZ yyyy"];

gonzalezreal

- (void)importValuesFromDictionary:(NSDictionary *)dictionary
{
    self.identifier = dictionary[@"id"];
    
    NSDictionary *retweetedStatus = dictionary[@"retweeted_status"];
    
    NSString *dateString = nil;
    NSDictionary *userDictionary = nil;
    NSDictionary *retweetedByDictionary = nil;
    

gonzalezreal

+ (id)lastTweetInManagedObjectContext:(NSManagedObjectContext *)context
{
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"identifier"
                                                                     ascending:NO];
    
    NSFetchRequest *fetchRequest = [self fetchRequest];
    [fetchRequest setSortDescriptors:@[sortDescriptor]];
    [fetchRequest setFetchLimit:1];
    
    return [[context executeFetchRequest:fetchRequest error:NULL] lastObject];

gonzalezreal

+ (id)firstTweetInManagedObjectContext:(NSManagedObjectContext *)context
{
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"identifier"
                                                                     ascending:YES];
    
    NSFetchRequest *fetchRequest = [self fetchRequest];
    [fetchRequest setSortDescriptors:@[sortDescriptor]];
    [fetchRequest setFetchLimit:1];
    
    return [[context executeFetchRequest:fetchRequest error:NULL] lastObject];

gonzalezreal

+ (NSFetchRequest *)fetchRequestForAllTweets
{
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"identifier"
                                                                     ascending:NO];
    
    NSFetchRequest *fetchRequest = [self fetchRequest];
    [fetchRequest setSortDescriptors:@[sortDescriptor]];
    
    return fetchRequest;
}

gonzalezreal

+ (NSFetchRequest *)fetchRequestForAllTweets;

+ (id)firstTweetInManagedObjectContext:(NSManagedObjectContext *)context;
+ (id)lastTweetInManagedObjectContext:(NSManagedObjectContext *)context;