/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <Windows.h>

#include <msiquery.h>

#include <shlwapi.h>

extern "C" {

#ifdef JP_EXPORT_FUNCTION

#error Unexpected JP_EXPORT_FUNCTION define

#endif

#define JP_EXPORT_FUNCTION comment(linker, "/EXPORT:" __FUNCTION__ "=" __FUNCDNAME__)

    BOOL WINAPI DllMain(HINSTANCE hInst, ULONG ulReason,

            LPVOID lpvReserved) {

        return TRUE;

    }

    BOOL DirectoryExist(TCHAR *szValue) {

        DWORD attr = GetFileAttributes(szValue);

        if (attr == INVALID_FILE_ATTRIBUTES) {

            return FALSE;

        }

        if (attr & FILE_ATTRIBUTE_DIRECTORY) {

            return TRUE;

        }

        return FALSE;

    }

    UINT __stdcall CheckInstallDir(MSIHANDLE hInstall) {

        #pragma JP_EXPORT_FUNCTION

        TCHAR *szValue = NULL;

        DWORD cchSize = 0;

        UINT result = MsiGetProperty(hInstall, TEXT("INSTALLDIR"),

                TEXT(""), &cchSize);

        if (result == ERROR_MORE_DATA) {

            cchSize = cchSize + 1; // NULL termination

            szValue = new TCHAR[cchSize];

            if (szValue) {

                result = MsiGetProperty(hInstall, TEXT("INSTALLDIR"),

                        szValue, &cchSize);

            } else {

                return ERROR_INSTALL_FAILURE;

            }

        }

        if (result != ERROR_SUCCESS) {

            delete [] szValue;

            return ERROR_INSTALL_FAILURE;

        }

        if (DirectoryExist(szValue)) {

            if (PathIsDirectoryEmpty(szValue)) {

                MsiSetProperty(hInstall, TEXT("INSTALLDIR_VALID"), TEXT("1"));

            } else {

                MsiSetProperty(hInstall, TEXT("INSTALLDIR_VALID"), TEXT("0"));

            }

        } else {

            MsiSetProperty(hInstall, TEXT("INSTALLDIR_VALID"), TEXT("1"));

        }

        delete [] szValue;

        return ERROR_SUCCESS;

    }

}