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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include <zencore/uid.h>
#include <optional>
#include <string_view>
#include <unordered_set>
namespace zen {
class IoBuffer;
/**
* @brief Records which keys in the oplog (entry["op"]["key"]) are in the ReferencedSet reported by the client that uploaded the oplog.
*
* An oplog can contain ops from an earlier incremental cook result that are no longer referenced in the most recent cook;
* the OplogReferencedSet allows clients that need to view only referenced-by-head-cook entries to trim the oplog down to
* those entries.
*
* Keys are case-sensitive; client must ensure that capitalization matches between the ReferencedSet and the oplog keys.
*/
class OplogReferencedSet
{
public:
void Emplace(Oid OplogId);
bool Contains(Oid OplogId, std::string_view OplogKey);
void Clear();
static std::optional<OplogReferencedSet> LoadFromChunk(const IoBuffer& ChunkData);
static constexpr std::string_view ReferencedSetOplogKey = "ReferencedSet";
private:
std::unordered_set<Oid> Set;
};
} // namespace zen
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