Files
UnrealEngineUWP/Engine/Source/Developer/IoStoreUtilities/Private/ZenStoreHttpClient.cpp
zousar shaker 96d0784963 Allow ZenServer to be autolaunched by editor use cases that require its presence without insisting that it always be autolaunched.
#rb matt.peters
#preflight 614b4150ee16e20001b146e3

#ROBOMERGE-AUTHOR: zousar.shaker
#ROBOMERGE-SOURCE: CL 17597162 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v871-17566257)

[CL 17597204 by zousar shaker in ue5-release-engine-test branch]
2021-09-22 13:00:17 -04:00

727 lines
19 KiB
C++

// Copyright Epic Games, Inc. All Rights Reserved.
#include "ZenStoreHttpClient.h"
#include "Algo/BinarySearch.h"
#include "Algo/IsSorted.h"
#include "Algo/Sort.h"
#include "Misc/ScopeRWLock.h"
#if PLATFORM_WINDOWS
#include "Async/Async.h"
#include "HAL/PlatformFileManager.h"
#include "IO/IoHash.h"
#include "Misc/ScopeLock.h"
#include "Misc/StringBuilder.h"
#include "ProfilingDebugging/CpuProfilerTrace.h"
#include "Serialization/BufferArchive.h"
#include "Serialization/CompactBinaryWriter.h"
#include "Serialization/LargeMemoryWriter.h"
#include "ZenSerialization.h"
#include "ZenServerHttp.h"
DEFINE_LOG_CATEGORY_STATIC(LogZenStore, Log, All);
namespace UE {
const uint32 FZenStoreHttpClient::PoolEntryCount = 32;
FZenStoreHttpClient::FZenStoreHttpClient()
{
RequestPool = MakeUnique<Zen::FZenHttpRequestPool>(ZenService.GetInstance().GetURL(), PoolEntryCount);
}
FZenStoreHttpClient::FZenStoreHttpClient(const FStringView InHostName, uint16 InPort)
: ZenService(InHostName, InPort)
{
RequestPool = MakeUnique<Zen::FZenHttpRequestPool>(ZenService.GetInstance().GetURL(), PoolEntryCount);
}
FZenStoreHttpClient::~FZenStoreHttpClient()
{
}
void
FZenStoreHttpClient::Initialize(FStringView InProjectId,
FStringView InOplogId,
FStringView ServerRoot,
FStringView EngineRoot,
FStringView ProjectRoot)
{
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_Initialize);
UE_LOG(LogZenStore, Display, TEXT("Establishing oplog %s / %s"), *FString(InProjectId), *FString(InOplogId));
// Establish project
{
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TStringBuilder<128> ProjectUri;
ProjectUri << "/prj/" << InProjectId;
TArray64<uint8> GetBuffer;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(ProjectUri, &GetBuffer);
// TODO: how to handle failure here? This is probably the most likely point of failure
// if the service is not up or not responding
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
UE_LOG(LogZenStore, Display, TEXT("Zen project '%s' already exists"), *FString(InProjectId));
bConnectionSucceeded = true;
}
else
{
Request->Reset();
FCbWriter ProjInfo;
ProjInfo.BeginObject();
ProjInfo << "id" << InProjectId;
ProjInfo << "root" << ServerRoot;
ProjInfo << "engine" << EngineRoot;
ProjInfo << "project" << ProjectRoot;
ProjInfo.EndObject();
Res = Request->PerformBlockingPost(ProjectUri, ProjInfo.Save().AsObject());
if (Res != Zen::FZenHttpRequest::Result::Success)
{
UE_LOG(LogZenStore, Error, TEXT("Zen project '%s' creation FAILED"), *FString(InProjectId));
bConnectionSucceeded = false;
// TODO: how to recover / handle this?
}
else if (Request->GetResponseCode() == 201)
{
UE_LOG(LogZenStore, Display, TEXT("Zen project '%s' created"), *FString(InProjectId));
bConnectionSucceeded = true;
}
else
{
UE_LOG(LogZenStore, Warning, TEXT("Zen project '%s' creation returned success but not HTTP 201"), *FString(InProjectId));
bConnectionSucceeded = true;
}
}
}
OplogPath = WriteToString<128>("/prj/", InProjectId, "/oplog/", InOplogId);
OplogNewEntryPath = WriteToString<128>("/prj/", InProjectId, "/oplog/", InOplogId, "/new");
OplogPrepNewEntryPath = WriteToString<128>("/prj/", InProjectId, "/oplog/", InOplogId, "/prep");
bAllowRead = true;
bAllowEdit = true;
}
void FZenStoreHttpClient::EstablishWritableOpLog(FStringView InProjectId, FStringView InOplogId, bool bFullBuild)
{
check(IsConnected());
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
if (bFullBuild)
{
UE_LOG(LogZenStore, Display, TEXT("Deleting oplog '%s'/'%s' if it exists"), *FString(InProjectId), *FString(InOplogId));
Request->PerformBlockingDelete(OplogPath);
Request->Reset();
}
TArray64<uint8> GetBuffer;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(OplogPath, &GetBuffer);
FCbObjectView OplogInfo;
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
UE_LOG(LogZenStore, Display, TEXT("Zen oplog '%s'/'%s' already exists"), *FString(InProjectId), *FString(InOplogId));
OplogInfo = FCbObjectView(GetBuffer.GetData());
}
else
{
FMemoryView Payload;
Request->Reset();
Res = Request->PerformBlockingPost(OplogPath, Payload);
if (Res != Zen::FZenHttpRequest::Result::Success)
{
UE_LOG(LogZenStore, Error, TEXT("Zen oplog '%s'/'%s' creation FAILED"), *FString(InProjectId), *FString(InOplogId));
// TODO: how to recover / handle this?
}
else if (Request->GetResponseCode() == 201)
{
UE_LOG(LogZenStore, Display, TEXT("Zen oplog '%s'/'%s' created"), *FString(InProjectId), *FString(InOplogId));
}
else
{
UE_LOG(LogZenStore, Warning, TEXT("Zen oplog '%s'/'%s' creation returned success but not HTTP 201"), *FString(InProjectId), *FString(InOplogId));
}
// Issue another GET to retrieve information
GetBuffer.Reset();
Request->Reset();
Res = Request->PerformBlockingDownload(OplogPath, &GetBuffer);
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
OplogInfo = FCbObjectView(GetBuffer.GetData());
}
}
TempDirPath = FUTF8ToTCHAR(OplogInfo["tempdir"].AsString());
}
void FZenStoreHttpClient::InitializeReadOnly(FStringView InProjectId, FStringView InOplogId)
{
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_InitializeReadOnly);
UE_LOG(LogZenStore, Display, TEXT("Establishing oplog %s / %s"), *FString(InProjectId), *FString(InOplogId));
// Establish project
{
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TArray64<uint8> GetBuffer;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(WriteToString<128>("/prj/", InProjectId), &GetBuffer);
// TODO: how to handle failure here? This is probably the most likely point of failure
// if the service is not up or not responding
if (Res != Zen::FZenHttpRequest::Result::Success || Request->GetResponseCode() != 200)
{
UE_LOG(LogZenStore, Fatal, TEXT("Zen project '%s' not found"), *FString(InProjectId));
bConnectionSucceeded = false;
}
else
{
bConnectionSucceeded = true;
}
}
// Establish oplog
check(IsConnected());
{
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
OplogPath = WriteToString<128>("/prj/", InProjectId, "/oplog/", InOplogId);
TArray64<uint8> GetBuffer;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(OplogPath, &GetBuffer);
if (Res != Zen::FZenHttpRequest::Result::Success || Request->GetResponseCode() != 200)
{
UE_LOG(LogZenStore, Fatal, TEXT("Zen oplog '%s'/'%s' not found"), *FString(InProjectId), *FString(InOplogId));
}
}
bAllowRead = true;
}
static std::atomic<uint32> GOpCounter;
TFuture<TIoStatusOr<uint64>> FZenStoreHttpClient::AppendOp(FCbPackage OpEntry)
{
check(bAllowEdit);
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_AppendOp);
#if WITH_EDITOR
EAsyncExecution ThreadPool = EAsyncExecution::LargeThreadPool;
#else
EAsyncExecution ThreadPool = EAsyncExecution::ThreadPool;
#endif
return Async(ThreadPool, [this, OpEntry]
{
TRACE_CPUPROFILER_EVENT_SCOPE(Zen_AppendOp_Async);
FLargeMemoryWriter SerializedPackage;
const uint32 Salt = ++GOpCounter;
bool IsUsingTempFiles = false;
if (TempDirPath.IsEmpty())
{
// Old-style with all attachments by value
OpEntry.Save(SerializedPackage);
}
else
{
TConstArrayView<FCbAttachment> Attachments = OpEntry.GetAttachments();
// Prep phase
TSet<FIoHash> NeedChunks;
{
FCbWriter Writer;
Writer.BeginObject();
Writer.BeginArray("have");
for (const FCbAttachment& Attachment : Attachments)
{
Writer.AddHash(Attachment.GetHash());
}
Writer.EndArray();
Writer.EndObject();
FCbFieldIterator Prep = Writer.Save();
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
bool IsOk = false;
const Zen::FZenHttpRequest::Result Res = Request->PerformBlockingPost(OplogPrepNewEntryPath, Prep.AsObjectView());
if (Res == Zen::FZenHttpRequest::Result::Success)
{
FCbObjectView NeedObject;
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
NeedObject = FCbObjectView(Request->GetResponseBuffer().GetData());
for (auto& Entry : NeedObject["need"])
{
NeedChunks.Add(Entry.AsHash());
}
IsOk = true;
}
}
}
// This uses a slight variation for package attachment serialization
// by writing larger attachments to a file and referencing it in the
// core object. Small attachments are serialized inline as normal
FCbWriter Writer;
FCbObject PackageObj = OpEntry.GetObject();
const FIoHash PackageObjHash = PackageObj.GetHash();
Writer.AddObject(PackageObj);
Writer.AddObjectAttachment(PackageObjHash);
// Send phase
for (const FCbAttachment& Attachment : Attachments)
{
bool IsSerialized = false;
const FIoHash AttachmentHash = Attachment.GetHash();
if (NeedChunks.Contains(AttachmentHash))
{
if (FSharedBuffer AttachView = Attachment.AsBinary())
{
if (AttachView.GetSize() >= StandaloneThresholdBytes)
{
// Write to temporary file. To avoid race conditions we derive
// the file name from a salt value and the attachment hash
FIoHash AttachmentSpec[] { FIoHash::HashBuffer(&Salt, sizeof Salt), AttachmentHash };
FIoHash AttachmentId = FIoHash::HashBuffer(MakeMemoryView(AttachmentSpec));
FString TempFilePath = TempDirPath / LexToString(AttachmentId);
IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
if (IFileHandle* FileHandle = PlatformFile.OpenWrite(*TempFilePath))
{
FileHandle->Write((const uint8*)AttachView.GetData(), AttachView.GetSize());
delete FileHandle;
Writer.AddHash(AttachmentHash);
IsSerialized = true;
IsUsingTempFiles = true;
}
else
{
// Take the slow path if we can't open the payload file in the
// large attachment directory
UE_LOG(LogZenStore, Warning, TEXT("Could not create file '%s', taking slow path for large attachment"), *TempFilePath);
}
}
}
if (!IsSerialized)
{
UE::Zen::SaveCbAttachment(Attachment, Writer);
}
}
else
{
Writer.AddHash(AttachmentHash);
}
}
Writer.AddNull();
Writer.Save(SerializedPackage);
}
UE_LOG(LogZenStore, Verbose, TEXT("Package size: %" UINT64_FMT), SerializedPackage.TotalSize());
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TStringBuilder<64> NewOpPostUri;
NewOpPostUri << OplogNewEntryPath;
if (IsUsingTempFiles)
{
NewOpPostUri << "?salt=" << Salt;
}
if (UE::Zen::FZenHttpRequest::Result::Success == Request->PerformBlockingPost(NewOpPostUri, SerializedPackage.GetView()))
{
return TIoStatusOr<uint64>(SerializedPackage.TotalSize());
}
else
{
return TIoStatusOr<uint64>((FIoStatus)(FIoStatusBuilder(EIoErrorCode::Unknown) << TEXT("Append OpLog failed, NewOpLogPath='") << OplogNewEntryPath << TEXT("'")));
}
});
}
TIoStatusOr<uint64> FZenStoreHttpClient::GetChunkSize(const FIoChunkId& Id)
{
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_GetChunkSize);
check(bAllowRead);
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TArray64<uint8> GetBuffer;
TStringBuilder<128> ChunkUri;
ChunkUri << OplogPath << '/' << Id;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingHead(ChunkUri);
FString ContentLengthStr;
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200 && Request->GetHeader("Content-Length", ContentLengthStr))
{
return FCStringWide::Atoi64(*ContentLengthStr);
}
return FIoStatus(EIoErrorCode::NotFound);
}
TIoStatusOr<FIoBuffer> FZenStoreHttpClient::ReadChunk(const FIoChunkId& Id, uint64 Offset, uint64 Size)
{
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_ReadChunk);
TStringBuilder<128> ChunkUri;
ChunkUri << OplogPath << '/' << Id;
return ReadOpLogUri(ChunkUri, Offset, Size);
}
TIoStatusOr<FIoBuffer> FZenStoreHttpClient::ReadOpLogAttachment(FStringView Id, uint64 Offset, uint64 Size)
{
TStringBuilder<128> ChunkUri;
ChunkUri << OplogPath << '/' << Id;
return ReadOpLogUri(ChunkUri, Offset, Size);
}
TIoStatusOr<FIoBuffer> FZenStoreHttpClient::ReadOpLogUri(FStringBuilderBase& ChunkUri, uint64 Offset, uint64 Size)
{
check(bAllowRead);
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TArray64<uint8> GetBuffer;
bool bHaveQuery = false;
auto AppendQueryDelimiter = [&bHaveQuery, &ChunkUri]
{
if (bHaveQuery)
{
ChunkUri.Append(TEXT("&"_WSV));
}
else
{
ChunkUri.Append(TEXT("?"_WSV));
bHaveQuery = true;
}
};
if (Offset)
{
AppendQueryDelimiter();
ChunkUri.Appendf(TEXT("offset=%" UINT64_FMT), Offset);
}
if (Size != ~uint64(0))
{
AppendQueryDelimiter();
ChunkUri.Appendf(TEXT("size=%" UINT64_FMT), Size);
}
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(ChunkUri, &GetBuffer);
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
return FIoBuffer(FIoBuffer::Clone, GetBuffer.GetData(), GetBuffer.Num());
}
return FIoStatus(EIoErrorCode::NotFound);
}
TFuture<TIoStatusOr<FCbObject>> FZenStoreHttpClient::GetOplog()
{
#if WITH_EDITOR
EAsyncExecution ThreadPool = EAsyncExecution::LargeThreadPool;
#else
EAsyncExecution ThreadPool = EAsyncExecution::ThreadPool;
#endif
return Async(ThreadPool, [this]
{
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TStringBuilder<128> Uri;
Uri << OplogPath << "/entries";
TArray64<uint8> GetBuffer;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(Uri, &GetBuffer);
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
FCbObjectView Response(GetBuffer.GetData());
return TIoStatusOr<FCbObject>(FCbObject::Clone(Response));
}
else
{
return TIoStatusOr<FCbObject>(FIoStatus(EIoErrorCode::NotFound));
}
});
}
TFuture<TIoStatusOr<FCbObject>> FZenStoreHttpClient::GetFiles()
{
#if WITH_EDITOR
EAsyncExecution ThreadPool = EAsyncExecution::LargeThreadPool;
#else
EAsyncExecution ThreadPool = EAsyncExecution::ThreadPool;
#endif
return Async(ThreadPool, [this]
{
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
TStringBuilder<128> Uri;
Uri << OplogPath << "/files";
TArray64<uint8> GetBuffer;
UE::Zen::FZenHttpRequest::Result Res = Request->PerformBlockingDownload(Uri, &GetBuffer);
if (Res == Zen::FZenHttpRequest::Result::Success && Request->GetResponseCode() == 200)
{
FCbObjectView Response(GetBuffer.GetData());
return TIoStatusOr<FCbObject>(FCbObject::Clone(Response));
}
else
{
return TIoStatusOr<FCbObject>(FIoStatus(EIoErrorCode::NotFound));
}
});
}
void
FZenStoreHttpClient::StartBuildPass()
{
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_StartBuildPass);
check(bAllowEdit);
}
TIoStatusOr<uint64>
FZenStoreHttpClient::EndBuildPass(FCbPackage OpEntry)
{
TRACE_CPUPROFILER_EVENT_SCOPE(ZenStoreHttp_EndBuildPass);
check(bAllowEdit);
FLargeMemoryWriter SerializedPackage;
UE::Zen::SaveCbPackage(OpEntry, SerializedPackage);
UE_LOG(LogZenStore, Verbose, TEXT("Package size: %lld"), SerializedPackage.TotalSize());
UE::Zen::FZenScopedRequestPtr Request(RequestPool.Get());
FMemoryView Payload { SerializedPackage.GetData(), (uint64)SerializedPackage.TotalSize()};
if (UE::Zen::FZenHttpRequest::Result::Success == Request->PerformBlockingPost(OplogNewEntryPath, Payload))
{
return static_cast<uint64>(Payload.GetSize());
}
else
{
return (FIoStatus)(FIoStatusBuilder(EIoErrorCode::Unknown) << TEXT("End build pass failed, NewOpLogPath='") << OplogNewEntryPath << TEXT("'"));
}
}
} // UE
#else // not PLATFORM_WINDOWS, dummy implementation stub for now
namespace UE {
namespace Zen {
struct FZenHttpRequestPool
{
};
}
FZenStoreHttpClient::FZenStoreHttpClient()
{
}
FZenStoreHttpClient::FZenStoreHttpClient(const FStringView InHostName, uint16 InPort)
{
}
FZenStoreHttpClient::~FZenStoreHttpClient()
{
}
void FZenStoreHttpClient::Initialize(
FStringView InProjectId,
FStringView InOplogId,
FStringView ServerRoot,
FStringView EngineRoot,
FStringView ProjectRoot)
{
}
void FZenStoreHttpClient::EstablishWritableOpLog(FStringView InProjectId, FStringView InOplogId, bool bFullBuild)
{
}
void FZenStoreHttpClient::InitializeReadOnly(FStringView InProjectId, FStringView InOplogId)
{
}
TIoStatusOr<uint64> FZenStoreHttpClient::GetChunkSize(const FIoChunkId& Id)
{
return 0;
}
TIoStatusOr<FIoBuffer> FZenStoreHttpClient::ReadChunk(const FIoChunkId& Id, uint64 Offset, uint64 Size)
{
return FIoBuffer();
}
TIoStatusOr<FIoBuffer> FZenStoreHttpClient::ReadOpLogAttachment(FStringView Id, uint64 Offset, uint64 Size)
{
return FIoBuffer();
}
TIoStatusOr<FIoBuffer> FZenStoreHttpClient::ReadOpLogUri(FStringBuilderBase& ChunkUri, uint64 Offset, uint64 Size)
{
return FIoBuffer();
}
void FZenStoreHttpClient::StartBuildPass()
{
}
TIoStatusOr<uint64> FZenStoreHttpClient::EndBuildPass(FCbPackage OpEntry)
{
return FIoStatus(EIoErrorCode::Unknown);
}
TFuture<TIoStatusOr<uint64>> FZenStoreHttpClient::AppendOp(FCbPackage OpEntry)
{
return TFuture<TIoStatusOr<uint64>>();
}
TFuture<TIoStatusOr<FCbObject>> FZenStoreHttpClient::GetOplog()
{
return TFuture<TIoStatusOr<FCbObject>>();
}
TFuture<TIoStatusOr<FCbObject>> FZenStoreHttpClient::GetFiles()
{
return TFuture<TIoStatusOr<FCbObject>>();
}
}
#endif // PLATFORM_WINDOWS
namespace UE
{
bool FZenStoreHttpClient::IsConnected() const
{
return bConnectionSucceeded;
}
namespace Zen::Private
{
TArray<TUniquePtr<UTF8CHAR[]>> AttachmentIds;
FRWLock AttachmentIdsLock;
}
const UTF8CHAR* FZenStoreHttpClient::FindOrAddAttachmentId(FUtf8StringView AttachmentText)
{
FRWScopeLock AttachmentIdScopeLock(Zen::Private::AttachmentIdsLock, SLT_ReadOnly);
bool bReadOnly = true;
for (;;)
{
int32 Index = Algo::LowerBound(Zen::Private::AttachmentIds, AttachmentText,
[](const TUniquePtr<UTF8CHAR[]>& Existing, FUtf8StringView AttachmentText)
{
return FUtf8StringView(Existing.Get()).Compare(AttachmentText, ESearchCase::IgnoreCase) < 0;
});
UTF8CHAR* Existing = nullptr;
if (Index != Zen::Private::AttachmentIds.Num())
{
Existing = Zen::Private::AttachmentIds[Index].Get();
}
if (Existing == nullptr || !FUtf8StringView(Existing).Equals(AttachmentText, ESearchCase::IgnoreCase))
{
if (bReadOnly)
{
AttachmentIdScopeLock.ReleaseReadOnlyLockAndAcquireWriteLock_USE_WITH_CAUTION();
bReadOnly = false;
continue;
}
auto StrDupNew = [](const UTF8CHAR* Data, int32 Len)
{
UTF8CHAR* Dup = new UTF8CHAR[Len + 1];
FMemory::Memcpy(Dup, Data, Len * sizeof(UTF8CHAR));
Dup[Len] = UTF8CHAR('\0');
return Dup;
};
Existing = StrDupNew(AttachmentText.GetData(), AttachmentText.Len());
Zen::Private::AttachmentIds.Insert(TUniquePtr<UTF8CHAR[]>(Existing), Index);
}
return Existing;
}
}
const UTF8CHAR* FZenStoreHttpClient::FindAttachmentId(FUtf8StringView AttachmentText)
{
FReadScopeLock AttachmentIdScopeLock(Zen::Private::AttachmentIdsLock);
int32 Index = Algo::LowerBound(Zen::Private::AttachmentIds, AttachmentText,
[](const TUniquePtr<UTF8CHAR[]>& Existing, FUtf8StringView AttachmentText)
{
return FUtf8StringView(Existing.Get()).Compare(AttachmentText, ESearchCase::IgnoreCase) < 0;
});
if (Index == Zen::Private::AttachmentIds.Num())
{
return nullptr;
}
const UTF8CHAR* Existing = Zen::Private::AttachmentIds[Index].Get();
if (!FUtf8StringView(Existing).Equals(AttachmentText, ESearchCase::IgnoreCase))
{
return nullptr;
}
return Existing;
}
}