Patoke-4JLibs/Windows_Libs/Dev/Storage/STO_SaveGame.cpp

/*
MIT License

Copyright (c) 2026 Patoke

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include "STO_SaveGame.h"
#include "STO_Main.h"

// @Patoke add
char CSaveGame::szPNGHeader[] = "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";

CSaveGame::CSaveGame()
{
    m_pSaveData = nullptr;
    m_uiSaveSize = 0;
    m_bIsSafeDisabled = false;

    ZeroMemory(m_szSaveUniqueName, sizeof(m_szSaveUniqueName));
    ZeroMemory(m_szSaveTitle, sizeof(m_szSaveTitle));

    m_pSaveDetails = nullptr;
    m_bHasSaveDetails = false;

    GetCurrentDirectoryA(sizeof(m_szSaveUniqueName), m_szSaveUniqueName);

    char dirName[256];
    char curDir[256];
    GetCurrentDirectoryA(sizeof(dirName), dirName);
    sprintf(curDir, "%s/Windows64/GameHDD/", dirName);
    CreateDirectoryA(curDir, 0);

    // @Patoke add
    this->m_pbThumbnailData = nullptr;
    this->m_uiThumbnailSize = 0;
    this->m_pbImageData = nullptr;
    this->m_uiImageSize = 0;
}

void CSaveGame::SetSaveDisabled(bool bDisable)
{
    m_bIsSafeDisabled = bDisable;
}

bool CSaveGame::GetSaveDisabled(void)
{
    return m_bIsSafeDisabled;
}

void CSaveGame::ResetSaveData()
{
    free(m_pSaveData);
    m_pSaveData = nullptr;
    m_uiSaveSize = 0;
}

C4JStorage::ESaveGameState CSaveGame::GetSavesInfo(int iPad, int (*Func)(LPVOID lpParam, SAVE_DETAILS *pSaveDetails, const bool), LPVOID lpParam,
                                                   char *pszSavePackName)
{
    WIN32_FIND_DATAA findFileData;
    WIN32_FILE_ATTRIBUTE_DATA fileInfoBuffer;

    if (!m_pSaveDetails)
    {
        m_pSaveDetails = new SAVE_DETAILS();
        memset(m_pSaveDetails, 0, sizeof(SAVE_DETAILS));
    }

    delete[] m_pSaveDetails->SaveInfoA;
    m_pSaveDetails->SaveInfoA = nullptr;
    m_pSaveDetails->iSaveC = 0;

    char dirName[256];
    char curDir[256];
    GetCurrentDirectoryA(sizeof(dirName), dirName);
    sprintf(curDir, "%s\\Windows64\\GameHDD\\*", dirName);

    int resultCount = 0;
    HANDLE h = FindFirstFileExA(curDir, FindExInfoStandard, &findFileData, FindExSearchLimitToDirectories, 0, 0);
    if (h == INVALID_HANDLE_VALUE)
    {
        DWORD error = GetLastError();
        printf("Error finding save dirs: 0x%08x\n", error);
    }
    else
    {
        do
        {
            if ((findFileData.dwFileAttributes & 0x10) != 0)
            {
                resultCount++;
            }
        } while (FindNextFileA(h, &findFileData));
        FindClose(h);
    }

    if (resultCount > 0)
    {
        m_pSaveDetails->SaveInfoA = new SAVE_INFO[resultCount];
        memset(m_pSaveDetails->SaveInfoA, 0, 184LL * resultCount);

        m_pSaveDetails->iSaveC = 0;
        int i = 0;
        HANDLE fi = FindFirstFileExA(curDir, FindExInfoStandard, &findFileData, FindExSearchLimitToDirectories, 0, 0);
        if (fi != INVALID_HANDLE_VALUE)
        {
            do
            {
                if ((findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0 && strcmp(findFileData.cFileName, ".") &&
                    strcmp(findFileData.cFileName, ".."))
                {
                    strcpy_s(m_pSaveDetails->SaveInfoA[i].UTF8SaveFilename, findFileData.cFileName);
                    strcpy_s(m_pSaveDetails->SaveInfoA[i].UTF8SaveTitle, findFileData.cFileName);

                    char fileName[280];
                    sprintf(fileName, "%s\\Windows64\\GameHDD\\%s\\saveData.ms", dirName, findFileData.cFileName);

                    GetFileAttributesExA(fileName, GetFileExInfoStandard, &fileInfoBuffer);
                    m_pSaveDetails->SaveInfoA[i].metaData.dataSize = fileInfoBuffer.nFileSizeLow;

                    char thumbName[280];
                    sprintf(thumbName, "%s\\Windows64\\GameHDD\\%s\\thumbData.png", dirName, findFileData.cFileName);

                    GetFileAttributesExA(thumbName, GetFileExInfoStandard, &fileInfoBuffer);
                    m_pSaveDetails->SaveInfoA[i++].metaData.thumbnailSize = fileInfoBuffer.nFileSizeLow;

                    m_pSaveDetails->iSaveC++;
                }
            } while (FindNextFileA(fi, &findFileData));
            FindClose(fi);
        }
    }

    m_bHasSaveDetails = true;
    if (Func)
    {
        Func(lpParam, m_pSaveDetails, true);
    }

    return C4JStorage::ESaveGame_Idle;
}

PSAVE_DETAILS CSaveGame::ReturnSavesInfo()
{
    if (m_bHasSaveDetails)
        return m_pSaveDetails;
    else
        return nullptr;
}

void CSaveGame::ClearSavesInfo()
{
    m_bHasSaveDetails = false;
    if (m_pSaveDetails)
    {
        if (m_pSaveDetails->SaveInfoA)
        {
            delete[] m_pSaveDetails->SaveInfoA;
            m_pSaveDetails->SaveInfoA = nullptr;
            m_pSaveDetails->iSaveC = 0;
        }
        delete m_pSaveDetails;
        m_pSaveDetails = 0;
    }
}

// @Patoke add
C4JStorage::ESaveGameState CSaveGame::LoadSaveDataThumbnail(PSAVE_INFO pSaveInfo,
                                                            int (*Func)(LPVOID lpParam, PBYTE pbThumbnail, DWORD dwThumbnailBytes), LPVOID lpParam)
{
    if (pSaveInfo == nullptr)
    {
        return C4JStorage::ESaveGame_Idle;
    }

    DWORD thumbSize = pSaveInfo->metaData.thumbnailSize;
    if (thumbSize > 0 && pSaveInfo->thumbnailData == nullptr)
    {
        char curDir[256];
        GetCurrentDirectoryA(sizeof(curDir), curDir);

        const char *saveName = (const char *)pSaveInfo;

        char thumbPath[512];
        sprintf(thumbPath, "%s/Windows64/GameHDD/%s/thumbData.ms", curDir, saveName);

        HANDLE hThumb = CreateFileA(thumbPath, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

        if (hThumb != INVALID_HANDLE_VALUE)
        {
            pSaveInfo->thumbnailData = new BYTE[thumbSize];

            DWORD bytesRead = 0;
            BOOL res = ReadFile(hThumb, pSaveInfo->thumbnailData, thumbSize, &bytesRead, 0);

            // If the read fails or is incomplete, clean up to prevent corrupted image data
            if (!res || bytesRead != thumbSize)
            {
                delete[] pSaveInfo->thumbnailData;
                pSaveInfo->thumbnailData = nullptr;
            }

            CloseHandle(hThumb);
        }
    }

    Func(lpParam, pSaveInfo->thumbnailData, pSaveInfo->metaData.thumbnailSize);
    return C4JStorage::ESaveGame_GetSaveThumbnail;
}

C4JStorage::ESaveGameState CSaveGame::LoadSaveData(PSAVE_INFO pSaveInfo, int (*Func)(LPVOID lpParam, const bool, const bool), LPVOID lpParam)
{
    SetSaveUniqueFilename(pSaveInfo->UTF8SaveFilename);

    if (m_pSaveData)
    {
        free(m_pSaveData);
    }

    m_pSaveData = malloc(pSaveInfo->metaData.dataSize);
    m_uiSaveSize = pSaveInfo->metaData.dataSize;

    char dirName[256];
    char curDir[256];
    char fileName[280];
    GetCurrentDirectoryA(sizeof(curDir), curDir);
    sprintf(dirName, "%s/Windows64/GameHDD/%s", curDir, m_szSaveUniqueName);
    CreateDirectoryA(dirName, 0);
    sprintf(fileName, "%s/saveData.ms", dirName);

    HANDLE h = CreateFileA(fileName, GENERIC_READ, 0, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

    bool success = false;
    if (h != INVALID_HANDLE_VALUE)
    {
        DWORD bytesRead = 0;
        BOOL res = ReadFile(h, m_pSaveData, m_uiSaveSize, &bytesRead, 0);
        _ASSERT(res && bytesRead == m_uiSaveSize);
        CloseHandle(h);
        success = true;
    }

    if (Func)
    {
        Func(lpParam, 0, success);
    }

    return C4JStorage::ESaveGame_Idle;
}

unsigned int CSaveGame::GetSaveSize()
{
    return m_uiSaveSize;
}

void CSaveGame::GetSaveData(void *pvData, unsigned int *puiBytes)
{
    if (pvData)
    {
        memmove(pvData, m_pSaveData, m_uiSaveSize);
        *puiBytes = m_uiSaveSize;
    }
    else
    {
        *puiBytes = 0;
    }
}

// @Patoke add
bool CSaveGame::GetSaveUniqueNumber(INT *piVal)
{
    if (m_szSaveUniqueName[0] == '\0')
    {
        return 0;
    }

    int year, month, day, hour, minute;
    sscanf(&m_szSaveUniqueName[4], "%02d%02d%02d%02d%02d", &year, &month, &day, &hour, &minute);

    *piVal = 2678400 * year + 86400 * month + 3600 * day + 60 * hour + minute;

    return true;
}

// @Patoke add
bool CSaveGame::GetSaveUniqueFilename(char *pszName)
{
    if (m_szSaveUniqueName[0] == '\0')
    {
        return false;
    }

    memset(pszName, 0, 14);
    for (int i = 0; i < 12; i++)
    {
        pszName[i] = m_szSaveUniqueName[i + 2];
    }

    return true;
}

void CSaveGame::SetSaveTitle(LPCWSTR pwchDefaultSaveName)
{
    CreateSaveUniqueName();
    memmove(m_szSaveTitle, pwchDefaultSaveName, sizeof(m_szSaveTitle));
}

PVOID CSaveGame::AllocateSaveData(unsigned int uiBytes)
{
    free(m_pSaveData);

    m_pSaveData = malloc(uiBytes);
    if (m_pSaveData)
    {
        m_uiSaveSize = uiBytes;
    }

    return m_pSaveData;
}

// @Patoke add
void CSaveGame::SetSaveImages(PBYTE pbThumbnail, DWORD dwThumbnailBytes, PBYTE pbImage, DWORD dwImageBytes, PBYTE pbTextData, DWORD dwTextDataBytes)
{
    if (this->m_pbThumbnailData)
    {
        free(this->m_pbThumbnailData);
    }

    this->m_pbImageData = pbImage;
    this->m_uiImageSize = dwImageBytes;

    DWORD dwNewThumbnailBytes = dwThumbnailBytes;
    if (dwTextDataBytes > 0)
    {
        // add extra bytes to the allocation for the text chunk (4 bytes for size, 4 bytes for type, 4 bytes for checksum)
        dwNewThumbnailBytes += dwTextDataBytes + 12;
    }

    // allocate the thumbnail
    this->m_pbThumbnailData = static_cast<PBYTE>(malloc(dwNewThumbnailBytes));
    this->m_uiThumbnailSize = dwNewThumbnailBytes;
    memset(this->m_pbThumbnailData, 0, dwNewThumbnailBytes);

    // copy original thumbnail data to new buffer
    memcpy(this->m_pbThumbnailData, pbThumbnail, dwThumbnailBytes);

    // inject text metadata into the thumbnail if it exists
    if (dwTextDataBytes > 0)
    {
        this->AddTextFieldToPNG(reinterpret_cast<unsigned __int8 *>(this->m_pbThumbnailData), dwThumbnailBytes, pbTextData, dwTextDataBytes,
                                dwNewThumbnailBytes);
    }
}

// @Patoke add
void CSaveGame::AddTextFieldToPNG(PBYTE pbImageData, DWORD dwImageBytes, PBYTE pbTextData, DWORD dwTextBytes, DWORD dwTotalSizeAllocated)
{
    if (dwImageBytes == 0)
    {
        return;
    }

    for (int j = 0; j < 8; ++j)
    {
        if (CSaveGame::szPNGHeader[j] != pbImageData[j])
        {
            return;
        }
    }

    unsigned int offset = 8;
    while (offset < dwImageBytes)
    {
        unsigned int chunkStart = offset;

        unsigned int chunkLength = this->ReverseBytes(*reinterpret_cast<unsigned int *>(&pbImageData[offset]));
        offset += 4;

        unsigned int chunkType = this->ReverseBytes(*reinterpret_cast<unsigned int *>(&pbImageData[offset]));
        offset += 4;

        if (chunkType == 'IEND')
        {
            offset = chunkStart;

            // write the tEXt chunk before the IEND chunk
            *reinterpret_cast<unsigned int *>(&pbImageData[offset]) = this->ReverseBytes(static_cast<unsigned int>(dwTextBytes));
            offset += 4;

            unsigned __int8 *textTypeStart = &pbImageData[offset];
            *reinterpret_cast<unsigned int *>(&pbImageData[offset]) = this->ReverseBytes('tEXt');
            offset += 4;

            memcpy(&pbImageData[offset], pbTextData, dwTextBytes);
            offset += dwTextBytes;

            unsigned int textCrc = InternalStorageManager.CRC(textTypeStart, dwTextBytes + 4);
            *reinterpret_cast<unsigned int *>(&pbImageData[offset]) = this->ReverseBytes(textCrc);
            offset += 4;

            // add a new IEND chunk
            *reinterpret_cast<unsigned int *>(&pbImageData[offset]) = 0;
            offset += 4;

            unsigned __int8 *iendTypeStart = &pbImageData[offset];
            *reinterpret_cast<unsigned int *>(&pbImageData[offset]) = this->ReverseBytes('IEND');
            offset += 4;

            unsigned int iendCrc = InternalStorageManager.CRC(iendTypeStart, 4);
            *reinterpret_cast<unsigned int *>(&pbImageData[offset]) = this->ReverseBytes(iendCrc);
            offset += 4;

            assert("uiCount <= dwTotalSizeAllocated");

            break;
        }
        else
        {
            // not 'IEND' chunk, continue to next chunk
            offset += chunkLength + 4;
        }
    }
}

// @Patoke add
unsigned int CSaveGame::ReverseBytes(unsigned int uiValue)
{
    unsigned int uiReturn = 0;

    uiReturn = (uiValue << 24) | ((uiValue << 8) & 0x00FF0000) | ((uiValue >> 8) & 0x0000FF00) | (uiValue >> 24);

    return uiReturn;
}

C4JStorage::ESaveGameState CSaveGame::SaveSaveData(int (*Func)(LPVOID, const bool), LPVOID lpParam)
{
    char dirName[256];
    char curDir[256];
    char fileName[280];
    char thumbName[280];

    GetCurrentDirectoryA(sizeof(curDir), curDir);
    sprintf(dirName, "%s/Windows64/GameHDD/%s", curDir, m_szSaveUniqueName);
    CreateDirectoryA(dirName, 0);
    sprintf(fileName, "%s/saveData.ms", dirName);

    HANDLE h = CreateFileA(fileName, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);

    DWORD bytesWritten = 0;
    BOOL res = WriteFile(h, m_pSaveData, m_uiSaveSize, &bytesWritten, 0);
    _ASSERT(res && bytesWritten == m_uiSaveSize);

    CloseHandle(h);

    // @Patoke add
    if (this->m_pbThumbnailData != nullptr && this->m_uiThumbnailSize > 0)
    {
        sprintf(thumbName, "%s/thumbData.png", dirName);

        HANDLE hThumb = CreateFileA(thumbName, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);

        DWORD thumbBytesWritten = 0;
        BOOL thumbRes = WriteFile(hThumb, this->m_pbThumbnailData, this->m_uiThumbnailSize, &thumbBytesWritten, 0);
        _ASSERT(thumbRes && thumbBytesWritten == this->m_uiThumbnailSize);

        CloseHandle(hThumb);
    }

    Func(lpParam, true);

    return C4JStorage::ESaveGame_Idle;
}

C4JStorage::ESaveGameState CSaveGame::DeleteSaveData(PSAVE_INFO pSaveInfo, int (*Func)(LPVOID lpParam, const bool), LPVOID lpParam)
{
    return C4JStorage::ESaveGame_Idle;
}

void CSaveGame::SetSaveUniqueFilename(char *szFilename)
{
    strcpy_s(m_szSaveUniqueName, szFilename);
}

void CSaveGame::CreateSaveUniqueName(void)
{
    _SYSTEMTIME UTCSysTime;
    GetSystemTime(&UTCSysTime);

    sprintf_s(m_szSaveUniqueName, sizeof(m_szSaveUniqueName), "%4d%02d%02d%02d%02d%02d", UTCSysTime.wYear, UTCSysTime.wMonth, UTCSysTime.wDay,
              UTCSysTime.wHour, UTCSysTime.wMinute, UTCSysTime.wSecond);
}