CompressedSaverBPLibrary.cpp

// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

#include "CompressedSaverPrivatePCH.h"
#include "CompressedSaverBPLibrary.h"

UCompressedSaverBPLibrary::UCompressedSaverBPLibrary(const FObjectInitializer& ObjectInitializer)
: Super(ObjectInitializer)
{

}

void UCompressedSaverBPLibrary::SaveLoadData(FArchive& Ar, FBrickGridData& SaveBrickGridData, FTransform& SavePlayerTransform, float& SaveCurrentTimeInDays)
{
	Ar << SaveBrickGridData; //This uses a custom operator code !
	Ar << SavePlayerTransform;
	Ar << SaveCurrentTimeInDays;
}

bool UCompressedSaverBPLibrary::SaveCompressed(FBrickGridData brickGridData, FTransform playerTransform, float currentTimeInDays)
{
	FString SavePath = "C:\\Users\\Johnny\\Desktop\\BrickGame\\mysavefile_compressed.save";
	FBufferArchive ToBinary;

	SaveLoadData(ToBinary, brickGridData, playerTransform, currentTimeInDays);

	UE_LOG(LogWindows, Warning, TEXT("Precompressed File Size: %s"), *FString::FromInt(ToBinary.Num()));

	TArray<uint8> compressedData;
	FArchiveSaveCompressedProxy compressor = FArchiveSaveCompressedProxy(compressedData, COMPRESS_ZLIB);

	compressor << ToBinary;

	compressor.Flush();

	UE_LOG(LogWindows, Warning, TEXT("Compressed File Size: %s"), *FString::FromInt(compressedData.Num()));

	if (FFileHelper::SaveArrayToFile(compressedData, *SavePath))
	{
		compressor.FlushCache();
		compressedData.Empty();

		ToBinary.FlushCache();
		ToBinary.Empty();

		ToBinary.Close();

		UE_LOG(LogWindows, Warning, TEXT("Save successfull!!"));

		return true;
	}
	else
	{
		compressor.FlushCache();
		compressedData.Empty();

		ToBinary.FlushCache();
		ToBinary.Empty();

		UE_LOG(LogWindows, Error, TEXT("File could not be saved!"));

		return false;
	}
}

bool UCompressedSaverBPLibrary::LoadCompressed(FBrickGridData& brickGridData, FTransform& playerTransform, float& currentTimeInDays)
{
	FString SavePath = "C:\\Users\\Johnny\\Desktop\\BrickGame\\mysavefile_compressed.save";

	TArray<uint8> compressedData;
	if (!FFileHelper::LoadFileToArray(compressedData, *SavePath))
	{
		UE_LOG(LogWindows, Error, TEXT("File seems invalid!"));
		return false;
	}

	FArchiveLoadCompressedProxy decompressor = FArchiveLoadCompressedProxy(compressedData, COMPRESS_ZLIB);

	if (decompressor.GetError())
	{
		UE_LOG(LogWindows, Error, TEXT("Error decompressing file! Did you compress the file?"));
		return false;
	}

	FBufferArchive decompressedBinaryArray;
	decompressor << decompressedBinaryArray;

	FMemoryReader fromBinary = FMemoryReader(decompressedBinaryArray, true);
	fromBinary.Seek(0);
	SaveLoadData(fromBinary, brickGridData, playerTransform, currentTimeInDays);

	compressedData.Empty();
	decompressor.FlushCache();
	fromBinary.FlushCache();

	decompressedBinaryArray.Empty();
	decompressedBinaryArray.Close();

	return true;
}