푸시 분석 및 커스텀 이벤트 로깅

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@interface RemoteStorage ()

@property (nonatomic) StorageType storageType;
@property (nonatomic, strong) NSUserDefaults *defaults;

@end

@implementation RemoteStorage

- (id)initWithStorageType:(StorageType)storageType {
  if (self = [super init]) {
    self.storageType = storageType;
  }
  return self;
}

- (void)store:(id)value forKey:(RemoteStorageKey)key {
  [[self defaults] setValue:value forKey:[self rawValueForKey:key]];
}

- (id)retrieveForKey:(RemoteStorageKey)key {
  return [[self defaults] objectForKey:[self rawValueForKey:key]];
}

- (void)removeObjectForKey:(RemoteStorageKey)key {
  [[self defaults] removeObjectForKey:[self rawValueForKey:key]];
}

- (void)resetStorageKeys {
  [[self defaults] removeObjectForKey:[self rawValueForKey:RemoteStorageKeyPendingCustomEvents]];
  [[self defaults] removeObjectForKey:[self rawValueForKey:RemoteStorageKeyPendingCustomAttributes]];
  [[self defaults] removeObjectForKey:[self rawValueForKey:RemoteStorageKeyPendingUserAttributes]];
}

- (NSUserDefaults *)defaults {
  if (!_defaults) {
    switch (self.storageType) {
      case StorageTypeStandard:
        _defaults = [NSUserDefaults standardUserDefaults];
        break;
      case StorageTypeSuite:
        _defaults = [[NSUserDefaults alloc] initWithSuiteName:@"group.com.company.appname.xyz"];
        break;
    }
  }
  return _defaults;
}

- (NSString*)rawValueForKey:(RemoteStorageKey)remoteStorageKey {
    switch(remoteStorageKey) {
    case RemoteStorageKeyPendingCustomEvents:
      return @"pending_custom_events";
    case RemoteStorageKeyPendingCustomAttributes:
      return @"pending_custom_attributes";
    case RemoteStorageKeyPendingUserAttributes:
      return @"pending_user_attributes";
    default:
      [NSException raise:NSGenericException format:@"Unexpected FormatType."];
  }
}

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@implementation UserAttribute

- (id)initWithUserField:(NSString *)userField attributeType:(UserAttributeType)attributeType {
  if (self = [super init]) {
    self.userField = userField;
    self.attributeType = attributeType;
  }
  return self;
}

- (void)encodeWithCoder:(NSCoder *)encoder {
  [encoder encodeObject:self.userField forKey:@"userField"];
  [encoder encodeInteger:self.attributeType forKey:@"attributeType"];
}

- (id)initWithCoder:(NSCoder *)decoder {
  if (self = [super init]) {
    self.userField = [decoder decodeObjectForKey:@"userField"];

    NSInteger attributeRawValue = [decoder decodeIntegerForKey:@"attributeType"];
    self.attributeType = (UserAttributeType) attributeRawValue;
  }
  return self;
}

@end

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@implementation NSMutableDictionary (Helper)

+ (instancetype)dictionaryWithEventName:(NSString *)eventName
                              properties:(NSDictionary *)properties {
  NSMutableDictionary *dict = [NSMutableDictionary dictionary];
  dict[@"event_name"] = eventName;

  if (properties) {
    for (id key in properties) {
      dict[key] = properties[key];
    }
  }

  return dict;
}

@end