Advanced chat: custom messages and client hooks (#74)

Co-authored-by: Emma Miler <27428383+emma-miler@users.noreply.github.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/NorthstarDedicatedTest/clientchathooks.cpp b/NorthstarDedicatedTest/clientchathooks.cpp
new file mode 100644
index 00000000..81413002
--- /dev/null
+++ b/NorthstarDedicatedTest/clientchathooks.cpp
@@ -0,0 +1,86 @@
+#include "pch.h"
+#include "clientchathooks.h"
+#include <rapidjson/document.h>
+#include "squirrel.h"
+#include "serverchathooks.h"
+#include "localchatwriter.h"
+
+typedef void(__fastcall* CHudChat__AddGameLineType)(void* self, const char* message, int fromPlayerId, bool isteam, bool isdead);
+CHudChat__AddGameLineType CHudChat__AddGameLine;
+
+struct ChatTags
+{
+	bool whisper;
+	bool team;
+	bool dead;
+};
+
+static void CHudChat__AddGameLineHook(void* self, const char* message, int inboxId, bool isTeam, bool isDead)
+{
+	// This hook is called for each HUD, but we only want our logic to run once.
+	if (!IsFirstHud(self))
+	{
+		return;
+	}
+
+	int senderId = inboxId & CUSTOM_MESSAGE_INDEX_MASK;
+	bool isAnonymous = senderId == 0;
+	bool isCustom = isAnonymous || (inboxId & CUSTOM_MESSAGE_INDEX_BIT);
+
+	// Type is set to 0 for non-custom messages, custom messages have a type encoded as the first byte
+	int type = 0;
+	const char* payload = message;
+	if (isCustom)
+	{
+		type = message[0];
+		payload = message + 1;
+	}
+
+	g_ClientSquirrelManager->setupfunc("CHudChat_ProcessMessageStartThread");
+	g_ClientSquirrelManager->pusharg((int)senderId - 1);
+	g_ClientSquirrelManager->pusharg(payload);
+	g_ClientSquirrelManager->pusharg(isTeam);
+	g_ClientSquirrelManager->pusharg(isDead);
+	g_ClientSquirrelManager->pusharg(type);
+	g_ClientSquirrelManager->call(5);
+}
+
+// void NSChatWrite( int context, string str )
+static SQRESULT SQ_ChatWrite(void* sqvm)
+{
+	int context = ClientSq_getinteger(sqvm, 1);
+	const char* str = ClientSq_getstring(sqvm, 2);
+
+	LocalChatWriter((LocalChatWriter::Context)context).Write(str);
+	return SQRESULT_NOTNULL;
+}
+
+// void NSChatWriteRaw( int context, string str )
+static SQRESULT SQ_ChatWriteRaw(void* sqvm)
+{
+	int context = ClientSq_getinteger(sqvm, 1);
+	const char* str = ClientSq_getstring(sqvm, 2);
+
+	LocalChatWriter((LocalChatWriter::Context)context).InsertText(str);
+	return SQRESULT_NOTNULL;
+}
+
+// void NSChatWriteLine( int context, string str )
+static SQRESULT SQ_ChatWriteLine(void* sqvm)
+{
+	int context = ClientSq_getinteger(sqvm, 1);
+	const char* str = ClientSq_getstring(sqvm, 2);
+
+	LocalChatWriter((LocalChatWriter::Context)context).WriteLine(str);
+	return SQRESULT_NOTNULL;
+}
+
+void InitialiseClientChatHooks(HMODULE baseAddress)
+{
+	HookEnabler hook;
+	ENABLER_CREATEHOOK(hook, (char*)baseAddress + 0x22E580, &CHudChat__AddGameLineHook, reinterpret_cast<LPVOID*>(&CHudChat__AddGameLine));
+
+	g_ClientSquirrelManager->AddFuncRegistration("void", "NSChatWrite", "int context, string text", "", SQ_ChatWrite);
+	g_ClientSquirrelManager->AddFuncRegistration("void", "NSChatWriteRaw", "int context, string text", "", SQ_ChatWriteRaw);
+	g_ClientSquirrelManager->AddFuncRegistration("void", "NSChatWriteLine", "int context, string text", "", SQ_ChatWriteLine);
+}