From a3769a4489face5fe4395e92e9a390355cc08b8d Mon Sep 17 00:00:00 2001
From: momo5502 <mauriceheumann@gmail.com>
Date: Mon, 13 Mar 2023 20:33:59 +0100
Subject: [PATCH] Rundimental ingame chat support

Technically, this implements #168.
However, it's very ugly, so it needs cleanup.
---
 src/client/component/chat.cpp           | 47 ++++++++++++++++++++++---
 src/client/component/chat.hpp           |  6 ++++
 src/client/game/symbols.hpp             |  3 ++
 src/client/steam/interfaces/friends.cpp |  3 +-
 4 files changed, 54 insertions(+), 5 deletions(-)
 create mode 100644 src/client/component/chat.hpp

diff --git a/src/client/component/chat.cpp b/src/client/component/chat.cpp
index ce3a92ad..c2ca88b3 100644
--- a/src/client/component/chat.cpp
+++ b/src/client/component/chat.cpp
@@ -1,8 +1,10 @@
 #include <std_include.hpp>
 #include "loader/component_loader.hpp"
+#include "chat.hpp"
 #include "game/game.hpp"
 
 #include <utils/hook.hpp>
+#include <utils/string.hpp>
 
 #include "command.hpp"
 #include "client_command.hpp"
@@ -41,17 +43,54 @@ namespace chat
 
 			utils::hook::invoke<void>(0x140298E70_g, ent, p.data());
 		}
+
+		void get_chat_client_name_stub(uint64_t xuid, char* buffer, const size_t max_length)
+		{
+			utils::string::copy(buffer, max_length, utils::string::va("%llX-something", xuid));
+			OutputDebugStringA(buffer);
+		}
 	}
 
-	class component final : public server_component
+	const char* GetClientName(const uint64_t xuid)
+	{
+		if (xuid < 19 && !game::is_server())
+		{
+			char buffer[256];
+			game::CL_GetClientName(0, static_cast<int>(xuid - 1), buffer, sizeof(buffer), true);
+
+			return utils::string::va("%s\n", buffer);
+		}
+
+		return "Unknown Soldier";
+	}
+
+	uint64_t* divert_xuid_to_client_num_stub(int, int client_num, int)
+	{
+		static thread_local uint64_t value;
+		// zero xuid is invalid, so increase the clientnum to prevent 0 values
+		value = static_cast<uint64_t>(client_num) + 1;
+		return &value;
+	}
+
+	class component final : public generic_component
 	{
 	public:
 		void post_unpack() override
 		{
-			client_command::add("say", cmd_say_f);
-			client_command::add("say_team", cmd_say_f);
+			utils::hook::call(game::select(0x141974B04, 0x14029908A), divert_xuid_to_client_num_stub);
 
-			client_command::add("chat", cmd_chat_f);
+			if (game::is_server())
+			{
+				client_command::add("say", cmd_say_f);
+				client_command::add("say_team", cmd_say_f);
+
+				client_command::add("chat", cmd_chat_f);
+			}
+			else
+			{
+				// Ignore some check that suppresses the chat
+				utils::hook::nop(0x141DEA9BD_g, 2);
+			}
 		}
 	};
 }
diff --git a/src/client/component/chat.hpp b/src/client/component/chat.hpp
new file mode 100644
index 00000000..aae9201f
--- /dev/null
+++ b/src/client/component/chat.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+namespace chat
+{
+	const char* GetClientName(const uint64_t xuid);
+}
diff --git a/src/client/game/symbols.hpp b/src/client/game/symbols.hpp
index e242117e..cc06984b 100644
--- a/src/client/game/symbols.hpp
+++ b/src/client/game/symbols.hpp
@@ -13,6 +13,9 @@ namespace game
 	                 int numPrivateSlots, const char* mapname, const char* gametype,
 	                 const char* somethingWithUserMaps)> CL_ConnectFromLobby
 		{0x14134C570};
+	WEAK symbol<bool(int localClientNum, int index, char* buf, int size, bool addClanName)> CL_GetClientName{
+		0x1413E3140
+	};
 
 	// Game
 	WEAK symbol<void(gentity_s* ent, gentity_s* target, int mode, const char* chatText)> G_Say{0x0, 0x140299170};
diff --git a/src/client/steam/interfaces/friends.cpp b/src/client/steam/interfaces/friends.cpp
index 0a9a7240..f72381c7 100644
--- a/src/client/steam/interfaces/friends.cpp
+++ b/src/client/steam/interfaces/friends.cpp
@@ -4,6 +4,7 @@
 #include <utils/nt.hpp>
 
 #include "component/name.hpp"
+#include "component/chat.hpp"
 
 namespace steam
 {
@@ -44,7 +45,7 @@ namespace steam
 
 	const char* friends::GetFriendPersonaName(steam_id steamIDFriend)
 	{
-		return "";
+		return chat::GetClientName(steamIDFriend.bits);
 	}
 
 	bool friends::GetFriendGamePlayed(steam_id steamIDFriend, void* pFriendGameInfo)