5 files changed, 123 insertions, 1 deletions
diff --git a/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj b/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj
index 1a79bee8..cabaf573 100644
--- a/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj
+++ b/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj
@@ -515,6 +515,7 @@
     <ClInclude Include="include\spdlog\tweakme.h" />
     <ClInclude Include="include\spdlog\version.h" />
     <ClInclude Include="keyvalues.h" />
+    <ClInclude Include="languagehooks.h" />
     <ClInclude Include="logging.h" />
     <ClInclude Include="main.h" />
     <ClInclude Include="masterserver.h" />
@@ -554,6 +555,7 @@
     <ClCompile Include="hooks.cpp" />
     <ClCompile Include="hookutils.cpp" />
     <ClCompile Include="keyvalues.cpp" />
+    <ClCompile Include="languagehooks.cpp" />
     <ClCompile Include="memalloc.cpp" />
     <ClCompile Include="miscclientfixes.cpp" />
     <ClCompile Include="misccommands.cpp" />
diff --git a/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj.filters b/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj.filters
index e4ddd92c..ac2684a3 100644
--- a/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj.filters
+++ b/NorthstarDedicatedTest/NorthstarDedicatedTest.vcxproj.filters
@@ -1422,6 +1422,9 @@
     <ClInclude Include="include\libcurl\include\curl\urlapi.h">
       <Filter>Header Files\include\libcurl</Filter>
     </ClInclude>
+    <ClInclude Include="languagehooks.h">
+      <Filter>Header Files\Client</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="dllmain.cpp">
@@ -1532,6 +1535,9 @@
     <ClCompile Include="miscserverfixes.cpp">
       <Filter>Source Files\Server</Filter>
     </ClCompile>
+    <ClCompile Include="languagehooks.cpp">
+      <Filter>Source Files\Client</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="include\spdlog\fmt\bundled\LICENSE.rst">
diff --git a/NorthstarDedicatedTest/dllmain.cpp b/NorthstarDedicatedTest/dllmain.cpp
index 87fb4d5f..79f54374 100644
--- a/NorthstarDedicatedTest/dllmain.cpp
+++ b/NorthstarDedicatedTest/dllmain.cpp
@@ -26,6 +26,7 @@
 #include "miscclientfixes.h"
 #include "miscserverfixes.h"
 #include "memalloc.h"
+#include "languagehooks.h"
 
 bool initialised = false;
 
@@ -63,7 +64,7 @@ bool InitialiseNorthstar()
 {
     if (initialised)
     {
-        spdlog::warn("Called InitialiseNorthstar more than once!");
+        //spdlog::warn("Called InitialiseNorthstar more than once!");
         return false;
     }
 
@@ -78,6 +79,7 @@ bool InitialiseNorthstar()
     InitialiseInterfaceCreationHooks();
 
     AddDllLoadCallback("tier0.dll", InitialiseTier0GameUtilFunctions);
+    AddDllLoadCallback("tier0.dll", InitialiseTier0LanguageHooks);
     AddDllLoadCallback("engine.dll", WaitForDebugger);
     AddDllLoadCallback("engine.dll", InitialiseEngineGameUtilFunctions);
     AddDllLoadCallback("server.dll", InitialiseServerGameUtilFunctions);
diff --git a/NorthstarDedicatedTest/languagehooks.cpp b/NorthstarDedicatedTest/languagehooks.cpp
new file mode 100644
index 00000000..08bacaf9
--- /dev/null
+++ b/NorthstarDedicatedTest/languagehooks.cpp
@@ -0,0 +1,109 @@
+#include "pch.h"
+#include "languagehooks.h"
+#include "gameutils.h"
+#include <filesystem>
+#include <regex>
+
+namespace fs = std::filesystem;
+
+typedef char* (*GetGameLanguageType)();
+char* GetGameLanguage();
+
+typedef LANGID(*Tier0_DetectDefaultLanguageType)();
+
+GetGameLanguageType GetGameLanguageOriginal;
+
+bool CheckLangAudioExists(char* lang)
+{
+	std::string path{ "r2\\sound\\general_" };
+	path += lang;
+	path += ".mstr";
+	return fs::exists(path);
+}
+
+std::vector<std::string> file_list(fs::path dir, std::regex ext_pattern)
+{
+	std::vector<std::string> result;
+
+	using iterator = fs::directory_iterator;
+
+	const iterator end;
+	for (iterator iter{ dir }; iter != end; ++iter)
+	{
+		const std::string filename = iter->path().filename().string();
+		std::smatch matches;
+		if (fs::is_regular_file(*iter) && std::regex_match(filename, matches, ext_pattern))
+		{
+			result.push_back(std::move(matches.str(1)));
+		}
+	}
+
+	return result;
+}
+
+std::string GetAnyInstalledAudioLanguage()
+{
+	for (const auto& lang : file_list("r2\\sound\\", std::regex(".*?general_([a-z]+)_patch_1\\.mstr")))
+		if (lang != "general" || lang != "")
+			return lang;
+	return "NO LANGUAGE DETECTED";
+}
+
+char* GetGameLanguageHook()
+{
+	auto tier0Handle = GetModuleHandleA("tier0.dll");
+	auto Tier0_DetectDefaultLanguageType = GetProcAddress(tier0Handle, "Tier0_DetectDefaultLanguage");
+	char* ingameLang1 = (char*)tier0Handle + 0xA9B60; // one of the globals we need to override if overriding lang (size: 256)
+	bool& canOriginDictateLang = *(bool*)((char*)tier0Handle + 0xA9A90);
+
+	const char* forcedLanguage;
+	if (CommandLine()->CheckParm("-language", &forcedLanguage))
+	{
+		if (!CheckLangAudioExists((char*)forcedLanguage))
+		{
+			spdlog::info("User tried to force the language (-language) to \"{}\", but audio for this language doesn't exist and the game is bound to error, falling back to next option...", forcedLanguage);
+		}
+		else
+		{
+			spdlog::info("User forcing the language (-language) to: {}", forcedLanguage);
+			strncpy(ingameLang1, forcedLanguage, 256);
+			return ingameLang1;
+		}
+	}
+
+	canOriginDictateLang = true; // let it try
+	{
+		auto lang = GetGameLanguageOriginal();
+		if (!CheckLangAudioExists(lang))
+		{
+			spdlog::info("Origin detected language \"{}\", but we do not have audio for it installed, falling back to the next option", lang);
+
+		}
+		else
+		{
+			spdlog::info("Origin detected language: {}", lang);
+			return lang;
+		}
+	}
+
+	Tier0_DetectDefaultLanguageType(); // force the global in tier0 to be populated with language inferred from user's system rather than defaulting to Russian
+	canOriginDictateLang = false; // Origin has no say anymore, we will fallback to user's system setup language
+	auto lang = GetGameLanguageOriginal();
+	spdlog::info("Detected system language: {}", lang);
+	if (!CheckLangAudioExists(lang))
+	{
+		spdlog::warn("Caution, audio for this language does NOT exist. You might want to override your game language with -language command line option.");
+		auto lang = GetAnyInstalledAudioLanguage();
+		spdlog::warn("Falling back to first installed audio language: {}", lang.c_str());
+		strncpy(ingameLang1, lang.c_str(), 256);
+		return ingameLang1;
+	}
+
+	return lang;
+}
+
+void InitialiseTier0LanguageHooks(HMODULE baseAddress)
+{
+	HookEnabler hook;
+	ENABLER_CREATEHOOK(hook, (char*)baseAddress + 0xF560, &GetGameLanguageHook, reinterpret_cast<LPVOID*>(&GetGameLanguageOriginal));
+}
+\ No newline at end of file
diff --git a/NorthstarDedicatedTest/languagehooks.h b/NorthstarDedicatedTest/languagehooks.h
new file mode 100644
index 00000000..55b591e0
--- /dev/null
+++ b/NorthstarDedicatedTest/languagehooks.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void InitialiseTier0LanguageHooks(HMODULE baseAddress);