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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include <zencore/iohash.h>
#include <zencore/string.h>
#include <zencore/uid.h>
#include <gsl/gsl-lite.hpp>
#include <unordered_map>
namespace zen {
class CbObjectView;
class CbWriter;
enum class CachePolicy : uint8_t
{
None = 0,
QueryLocal = 1 << 0,
QueryRemote = 1 << 1,
Query = QueryLocal | QueryRemote,
StoreLocal = 1 << 2,
StoreRemote = 1 << 3,
Store = StoreLocal | StoreRemote,
SkipMeta = 1 << 4,
SkipValue = 1 << 5,
SkipAttachments = 1 << 6,
SkipData = SkipMeta | SkipValue | SkipAttachments,
SkipLocalCopy = 1 << 7,
Local = QueryLocal | StoreLocal,
Remote = QueryRemote | StoreRemote,
Default = Query | Store,
Disable = None,
};
gsl_DEFINE_ENUM_BITMASK_OPERATORS(CachePolicy);
CachePolicy ParseQueryCachePolicy(std::string_view QueryPolicy, CachePolicy Default = CachePolicy::Query);
CachePolicy ParseStoreCachePolicy(std::string_view StorePolicy, CachePolicy Default = CachePolicy::Store);
CachePolicy ParseSkipCachePolicy(std::string_view SkipPolicy, CachePolicy Default = CachePolicy::None);
class CacheRecordPolicy
{
public:
CacheRecordPolicy() = default;
CachePolicy GetRecordPolicy() const { return m_RecordPolicy; }
CachePolicy GetPayloadPolicy(const Oid& PayloadId) const;
CachePolicy GetDefaultPayloadPolicy() const { return m_DefaultPayloadPolicy; }
static bool Load(CbObjectView RecordPolicyObject, CacheRecordPolicy& OutRecordPolicy);
static void Save(const CacheRecordPolicy& Policy, CbWriter& Writer);
private:
using PayloadPolicyMap = std::unordered_map<Oid, CachePolicy, Oid::Hasher>;
CachePolicy m_RecordPolicy = CachePolicy::Default;
CachePolicy m_DefaultPayloadPolicy = CachePolicy::Default;
PayloadPolicyMap m_PayloadPolicies;
};
struct CacheKey
{
std::string Bucket;
IoHash Hash;
static CacheKey Create(std::string_view Bucket, const IoHash& Hash) { return {.Bucket = ToLower(Bucket), .Hash = Hash}; }
static const CacheKey Empty;
};
inline bool
operator==(const CacheKey& A, const CacheKey& B)
{
return A.Bucket == B.Bucket && A.Hash == B.Hash;
}
inline bool
operator!=(const CacheKey& A, const CacheKey& B)
{
return A.Bucket != B.Bucket || A.Hash != B.Hash;
}
inline bool
operator<(const CacheKey& A, const CacheKey& B)
{
const std::string& BucketA = A.Bucket;
const std::string& BucketB = B.Bucket;
return BucketA == BucketB ? A.Hash < B.Hash : BucketA < BucketB;
}
struct CacheChunkRequest
{
CacheKey Key;
IoHash ChunkId;
Oid PayloadId;
uint64_t RawOffset = 0ull;
uint64_t RawSize = ~uint64_t(0);
CachePolicy Policy = CachePolicy::Default;
};
inline bool
operator<(const CacheChunkRequest& A, const CacheChunkRequest& B)
{
if (A.Key < B.Key)
{
return true;
}
if (B.Key < A.Key)
{
return false;
}
if (A.ChunkId < B.ChunkId)
{
return true;
}
if (B.ChunkId < A.ChunkId)
{
return false;
}
if (A.PayloadId < B.PayloadId)
{
return true;
}
if (B.PayloadId < A.PayloadId)
{
return false;
}
return A.RawOffset < B.RawOffset;
}
} // namespace zen
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