#include "stdafx.h"

#include "unzip.h"

#include "MachineInstaller.h"

#include "resource.h"

#include <sddl.h>

bool directoryExists(wchar_t* path) {

DWORD dwResult = GetFileAttributes(path);

if (dwResult != INVALID_FILE_ATTRIBUTES) {

return true;

}

// NB: The directory could exist but we can't access it, let's check

DWORD dwLastError = GetLastError();

if (dwLastError == ERROR_FILE_NOT_FOUND) return false;

if (dwLastError == ERROR_PATH_NOT_FOUND) return false;

return true;

}

bool MachineInstaller::ShouldSilentInstall()

{

// Figure out the package name from our own EXE name

// The name consist of [$pkgName]DeploymentTool.exe

wchar_t ourFile[MAX_PATH];

HMODULE hMod = GetModuleHandle(NULL);

GetModuleFileName(hMod, ourFile, _countof(ourFile));

CString fullPath = CString(ourFile);

CString pkgName = CString(ourFile + fullPath.ReverseFind(L'\\'));

pkgName.Replace(L"DeploymentTool.exe", L"");

wchar_t installFolder[MAX_PATH];

// NB: Users often get into the sitch where they install the MSI, then try to

// install the standalone package on top of that. In previous versions we tried

// to detect if the app was properly installed, but now we're taking the much

// more conservative approach, that if the package dir exists in any way, we're

// bailing out

// C:\Users\Username\AppData\Local\$pkgName

SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA, NULL, SHGFP_TYPE_CURRENT, installFolder);

wcscat(installFolder, L"\\");

wcscat(installFolder, pkgName);

if (directoryExists(installFolder)) {

return false;

}

// C:\ProgramData\$pkgName\$username

wchar_t username[512];

DWORD unamesize = _countof(username);

SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL, SHGFP_TYPE_CURRENT, installFolder);

GetUserName(username, &unamesize);

wcscat(installFolder, L"\\");

wcscat(installFolder, pkgName);

wcscat(installFolder, L"\\");

wcscat(installFolder, username);

if (directoryExists(installFolder)) {

return false;

}

// None of these exist, we should install

return true;

}