gistfile1.txt

+(void)retrieveSentimentForVideo:(VideoEntity*)video withResultBlock:(void(^)(NSArray* sentiment))resultBlock
{
    NSMutableArray* sentimentsRetrieved = [[NSMutableArray alloc] init];
    
    __block __weak void (^weakSentimentsRetrievedBlock)(NSArray*);
    void (^sentimentsRetrievedBlock)(NSArray*);
    weakSentimentsRetrievedBlock = sentimentsRetrievedBlock = ^void(NSArray* sentiments) {
        [sentimentsRetrieved addObjectsFromArray:sentiments];
        if ([sentiments count] == 1000) {
            [self querySentimentForVideo:video skippingToResultNumber:[sentimentsRetrieved count] withResultBlock:weakSentimentsRetrievedBlock];
        } else {
            resultBlock(sentimentsRetrieved);
        }
    };
    
    [self querySentimentForVideo:video skippingToResultNumber:0 withResultBlock:sentimentsRetrievedBlock];
}

+(void)querySentimentForVideo:(VideoEntity*)video skippingToResultNumber:(NSUInteger)skipTo withResultBlock:(void(^)(NSArray* sentiments))resultBlock
{
    PFQuery* query = [PFQuery queryWithClassName:kSentimentObject];
    [query orderByAscending:kDatabaseCreatedAt];
    [query whereKey:kDatabaseCreatedAt greaterThan:video.start];
    [query whereKey:kDatabaseCreatedAt lessThanOrEqualTo:video.end];
    query.limit = 1000;
    query.skip = skipTo;
    
    
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (error) {
            return;
        }
        
        NSMutableArray* sentimentEntities = [[NSMutableArray alloc] init];
        for (PFObject* sentimentObject in objects) {
            
            NSString* userId = [sentimentObject objectForKey:kSentimentUserId];
            NSString* sentimentString = [sentimentObject objectForKey:kSentimentString];
            
            SentimentEntity* s = [SentimentEntity entityWithId:[sentimentObject objectId] userId:userId createdAt:[sentimentObject createdAt] sentimentString:sentimentString];
            
            [sentimentEntities addObject:s];
        }
        
        resultBlock(sentimentEntities);
    }];
}