Call bunch of requests (blocks)

YGFileService.m

+ (void)deleteDocumentsForFiles:(NSArray *)files forAccount:(NSString *)accountID success:(void (^)())success failure:(void (^)(NSError *error))failure {
    __block NSInteger successDeleting = 0;
    __block NSInteger failureDeleting = 0;
    dispatch_group_t deleteDocumentGroup = dispatch_group_create();
    for (YGFile *file in files) {
        dispatch_group_enter(deleteDocumentGroup);
        [YGFileService deleteDocument:file.documentID forAccount:accountID success:^{
            DDLogVerbose(@"Delete document %@ success", file.documentID);
            successDeleting++;
            DDLogVerbose(@"successDeleting %d", successDeleting);
            dispatch_group_leave(deleteDocumentGroup);
        } failure:^(NSError *error) {
            DDLogVerbose(@"Delete file document error - %@", error);
            failureDeleting++;
            DDLogVerbose(@"failureDeleting %d", failureDeleting);
            dispatch_group_leave(deleteDocumentGroup);
        }];
    }
    dispatch_group_notify(deleteDocumentGroup, dispatch_get_main_queue(), ^{
        DDLogVerbose(@"Doc deleting: %d success, %d failure", successDeleting, failureDeleting);
        if (failureDeleting > 0) {
            NSError *tempError = [NSError errorWithType:LCErrorTypeTempServerError];
            failure(tempError);
        }
        else {
            success();
        }
    });
}