From f5ab6fb5e8be7b73e6003d4145081d5e0c0ce287 Mon Sep 17 00:00:00 2001
From: Jack <66967891+ASpoonPlaysGames@users.noreply.github.com>
Date: Wed, 27 Dec 2023 00:32:01 +0000
Subject: Folder restructuring from primedev (#624)

Copies of over the primedev folder structure for easier cherry-picking of further changes

Co-authored-by: F1F7Y <filip.bartos07@proton.me>
---
 primedev/shared/playlist.cpp | 125 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 primedev/shared/playlist.cpp

(limited to 'primedev/shared/playlist.cpp')

diff --git a/primedev/shared/playlist.cpp b/primedev/shared/playlist.cpp
new file mode 100644
index 00000000..2b9ad979
--- /dev/null
+++ b/primedev/shared/playlist.cpp
@@ -0,0 +1,125 @@
+#include "playlist.h"
+#include "core/convar/concommand.h"
+#include "core/convar/convar.h"
+#include "squirrel/squirrel.h"
+#include "engine/hoststate.h"
+#include "engine/r2engine.h"
+#include "server/serverpresence.h"
+
+AUTOHOOK_INIT()
+
+// use the R2 namespace for game funcs
+namespace R2
+{
+	DEFINED_VAR_AT(engine.dll + 0x18C640, GetCurrentPlaylistName);
+	DEFINED_VAR_AT(engine.dll + 0x18EB20, SetCurrentPlaylist);
+	DEFINED_VAR_AT(engine.dll + 0x18ED00, SetPlaylistVarOverride);
+	DEFINED_VAR_AT(engine.dll + 0x18C680, GetCurrentPlaylistVar);
+} // namespace R2
+
+ConVar* Cvar_ns_use_clc_SetPlaylistVarOverride;
+
+// clang-format off
+AUTOHOOK(clc_SetPlaylistVarOverride__Process, engine.dll + 0x222180,
+char, __fastcall, (void* a1, void* a2))
+// clang-format on
+{
+	// the private_match playlist on mp_lobby is the only situation where there should be any legitimate sending of this netmessage
+	if (!Cvar_ns_use_clc_SetPlaylistVarOverride->GetBool() || strcmp(R2::GetCurrentPlaylistName(), "private_match") ||
+		strcmp(g_pGlobals->m_pMapName, "mp_lobby"))
+		return 1;
+
+	return clc_SetPlaylistVarOverride__Process(a1, a2);
+}
+
+// clang-format off
+AUTOHOOK(SetCurrentPlaylist, engine.dll + 0x18EB20,
+bool, __fastcall, (const char* pPlaylistName))
+// clang-format on
+{
+	bool bSuccess = SetCurrentPlaylist(pPlaylistName);
+
+	if (bSuccess)
+	{
+		spdlog::info("Set playlist to {}", R2::GetCurrentPlaylistName());
+		g_pServerPresence->SetPlaylist(R2::GetCurrentPlaylistName());
+	}
+
+	return bSuccess;
+}
+
+// clang-format off
+AUTOHOOK(SetPlaylistVarOverride, engine.dll + 0x18ED00,
+void, __fastcall, (const char* pVarName, const char* pValue))
+// clang-format on
+{
+	if (strlen(pValue) >= 64)
+		return;
+
+	SetPlaylistVarOverride(pVarName, pValue);
+}
+
+// clang-format off
+AUTOHOOK(GetCurrentPlaylistVar, engine.dll + 0x18C680,
+const char*, __fastcall, (const char* pVarName, bool bUseOverrides))
+// clang-format on
+{
+	if (!bUseOverrides && !strcmp(pVarName, "max_players"))
+		bUseOverrides = true;
+
+	return GetCurrentPlaylistVar(pVarName, bUseOverrides);
+}
+
+// clang-format off
+AUTOHOOK(GetCurrentGamemodeMaxPlayers, engine.dll + 0x18C430,
+int, __fastcall, ())
+// clang-format on
+{
+	const char* pMaxPlayers = R2::GetCurrentPlaylistVar("max_players", 0);
+	if (!pMaxPlayers)
+		return GetCurrentGamemodeMaxPlayers();
+
+	int iMaxPlayers = atoi(pMaxPlayers);
+	return iMaxPlayers;
+}
+
+void ConCommand_playlist(const CCommand& args)
+{
+	if (args.ArgC() < 2)
+		return;
+
+	R2::SetCurrentPlaylist(args.Arg(1));
+}
+
+void ConCommand_setplaylistvaroverride(const CCommand& args)
+{
+	if (args.ArgC() < 3)
+		return;
+
+	for (int i = 1; i < args.ArgC(); i += 2)
+		R2::SetPlaylistVarOverride(args.Arg(i), args.Arg(i + 1));
+}
+
+ON_DLL_LOAD_RELIESON("engine.dll", PlaylistHooks, (ConCommand, ConVar), (CModule module))
+{
+	AUTOHOOK_DISPATCH()
+
+	// playlist is the name of the command on respawn servers, but we already use setplaylist so can't get rid of it
+	RegisterConCommand("playlist", ConCommand_playlist, "Sets the current playlist", FCVAR_NONE);
+	RegisterConCommand("setplaylist", ConCommand_playlist, "Sets the current playlist", FCVAR_NONE);
+	RegisterConCommand("setplaylistvaroverrides", ConCommand_setplaylistvaroverride, "sets a playlist var override", FCVAR_NONE);
+
+	// note: clc_SetPlaylistVarOverride is pretty insecure, since it allows for entirely arbitrary playlist var overrides to be sent to the
+	// server, this is somewhat restricted on custom servers to prevent it being done outside of private matches, but ideally it should be
+	// disabled altogether, since the custom menus won't use it anyway this should only really be accepted if you want vanilla client
+	// compatibility
+	Cvar_ns_use_clc_SetPlaylistVarOverride = new ConVar(
+		"ns_use_clc_SetPlaylistVarOverride", "0", FCVAR_GAMEDLL, "Whether the server should accept clc_SetPlaylistVarOverride messages");
+
+	// patch to prevent clc_SetPlaylistVarOverride from being able to crash servers if we reach max overrides due to a call to Error (why is
+	// this possible respawn, wtf) todo: add a warning for this
+	module.Offset(0x18ED8D).Patch("C3");
+
+	// patch to allow setplaylistvaroverride to be called before map init on dedicated and private match launched through the game
+	module.Offset(0x18ED17).NOP(6);
+}
-- 
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