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/*
* 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>
#include <memory>
#import "Firestore/Source/Local/FSTMutationQueue.h"
#include "Firestore/core/src/firebase/firestore/auth/user.h"
#include "leveldb/db.h"
@class FSTLevelDB;
@class FSTLocalSerializer;
@protocol FSTGarbageCollector;
NS_ASSUME_NONNULL_BEGIN
/** A mutation queue for a specific user, backed by LevelDB. */
@interface FSTLevelDBMutationQueue : NSObject <FSTMutationQueue>
- (instancetype)init __attribute__((unavailable("Use a static constructor")));
/** The garbage collector to notify about potential garbage keys. */
@property(nonatomic, weak, readwrite, nullable) id<FSTGarbageCollector> garbageCollector;
/**
* Creates a new mutation queue for the given user, in the given LevelDB.
*
* @param user The user for which to create a mutation queue.
* @param db The LevelDB in which to create the queue.
*/
+ (instancetype)mutationQueueWithUser:(const firebase::firestore::auth::User &)user
db:(FSTLevelDB *)db
serializer:(FSTLocalSerializer *)serializer;
/**
* Returns one larger than the largest batch ID that has been stored. If there are no mutations
* returns 0. Note that batch IDs are global.
*/
+ (FSTBatchID)loadNextBatchIDFromDB:(leveldb::DB *)db;
@end
NS_ASSUME_NONNULL_END
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