feat: add dialog handler for ModMan

src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.cpp

@@ -0,0 +1,40 @@
+#include "PlatformUtilsWindows.h"
+
+#ifdef _WIN32
+
+#include <exception>
+#include <format>
+#include <Windows.h>
+
+namespace PLATFORM_NAMESPACE_WINDOWS
+{
+    std::string WideStringToString(const std::wstring& wideString)
+    {
+        if (wideString.empty())
+            return "";
+
+        const auto sizeNeeded = WideCharToMultiByte(CP_UTF8, 0, wideString.data(), static_cast<int>(wideString.size()), nullptr, 0, nullptr, nullptr);
+        if (sizeNeeded <= 0)
+            throw std::runtime_error(std::format("WideCharToMultiByte() failed: {}", sizeNeeded));
+
+        std::string result(sizeNeeded, 0);
+        WideCharToMultiByte(CP_UTF8, 0, wideString.data(), static_cast<int>(wideString.size()), result.data(), sizeNeeded, nullptr, nullptr);
+        return result;
+    }
+
+    std::wstring StringToWideString(const std::string& string)
+    {
+        if (string.empty())
+            return L"";
+
+        const auto sizeNeeded = MultiByteToWideChar(CP_UTF8, 0, string.data(), static_cast<int>(string.size()), nullptr, 0);
+        if (sizeNeeded <= 0)
+            throw std::runtime_error(std::format("MultiByteToWideChar() failed: {}", sizeNeeded));
+
+        std::wstring result(sizeNeeded, 0);
+        MultiByteToWideChar(CP_UTF8, 0, string.data(), static_cast<int>(string.size()), result.data(), sizeNeeded);
+        return result;
+    }
+} // namespace PLATFORM_NAMESPACE_WINDOWS
+
+#endif