firebase-ios-sdk/FirebaseDatabase/Sources/Core/Operation/FOperation.h

/*
 * Copyright 2017 Google
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#import <Foundation/Foundation.h>

@class FOperationSource;
@class FPath;

typedef NS_ENUM(NSInteger, FOperationType) {
    FOperationTypeOverwrite = 0,
    FOperationTypeMerge = 1,
    FOperationTypeAckUserWrite = 2,
    FOperationTypeListenComplete = 3
};

@protocol FOperation <NSObject>
@property(nonatomic, strong, readonly) FOperationSource *source;
@property(nonatomic, readonly) FOperationType type;
@property(nonatomic, strong, readonly) FPath *path;
- (id<FOperation>)operationForChild:(NSString *)childKey;
@end