From 46bed8d09f32360377350d71816a76abdfbf2c7c Mon Sep 17 00:00:00 2001
From: BobTheBob <32057864+BobTheBob9@users.noreply.github.com>
Date: Wed, 24 Aug 2022 00:32:31 +0100
Subject: Adjust folder structure (#242)

* Adjust folder structure

* change launcher directory name
---
 NorthstarDLL/languagehooks.cpp | 119 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 NorthstarDLL/languagehooks.cpp

(limited to 'NorthstarDLL/languagehooks.cpp')

diff --git a/NorthstarDLL/languagehooks.cpp b/NorthstarDLL/languagehooks.cpp
new file mode 100644
index 00000000..c8d43901
--- /dev/null
+++ b/NorthstarDLL/languagehooks.cpp
@@ -0,0 +1,119 @@
+#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;
+
+	if (!fs::exists(dir) || !fs::is_directory(dir))
+		return 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))
+		{
+			if (strcmp(lang, "russian") !=
+				0) // don't log for "russian" since it's the default and that means Origin detection just didn't change it most likely
+				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 the 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
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