ViewController.m

//
//  ViewController.m

#import "ViewController.h"

#import <Realm/Realm.h>

@interface QiitaTag : RLMObject

@property NSString *id;
@property NSString *iconUrl;
@property NSInteger followersCount;
@property NSInteger itemsCount;

@end
RLM_ARRAY_TYPE(QiitaTag);

@implementation QiitaTag

+ (NSString *)primaryKey {
  return @"id";
}

+(NSDictionary *)defaultPropertyValues
{
  return @{@"iconUrl": @"", @"followersCount": @0, @"itemsCount": @0};
}

@end


@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
  [super viewDidLoad];
  
  RLMRealm *realm = [RLMRealm defaultRealm];
  
  RLMResults *tags = [QiitaTag allObjects];
  NSLog(@"Load %@ tag items.", @(tags.count));
  
  [realm transactionWithBlock:^{
    for (int i=1; i < 100; i++) {
      NSData *data = [NSData dataWithContentsOfFile:[NSString stringWithFormat:@"/tmp/qiitags/%i.json", i]];
      NSArray *tags = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
      for (NSDictionary *object in tags) {
        QiitaTag *tag = [QiitaTag new];
        tag.id = object[@"id"];
        if ([object[@"icon_url"] isKindOfClass:[NSString class]]) {
            tag.iconUrl = object[@"icon_url"];
        }
        tag.itemsCount = [object[@"items_count"] integerValue];
        tag.followersCount = [object[@"followers_count"] integerValue];
        [realm addOrUpdateObject:tag];
        NSLog(@"Put: %@", tag.id);
      }
    }
  }];
}

- (void)didReceiveMemoryWarning {
  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.
}

@end