From d2dface41c195434600a056de1b8cb4e7d2031fd Mon Sep 17 00:00:00 2001
From: Hex4dec <164735227+Hex4dec@users.noreply.github.com>
Date: Sun, 14 Dec 2025 15:46:23 +0200
Subject: [PATCH] Add IsInDownloadables and AddToDownloadables to VScript

---
 src/game/server/vscript_server.cpp | 33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/game/server/vscript_server.cpp b/src/game/server/vscript_server.cpp
index c1b2eae8c13..ccc52674315 100644
--- a/src/game/server/vscript_server.cpp
+++ b/src/game/server/vscript_server.cpp
@@ -24,6 +24,7 @@
 #include "engine/IEngineSound.h"
 #include "vscript_utils.h"
 #include "netpropmanager.h"
+#include "networkstringtable_gamedll.h"
 #include "client.h"
 #include "tier0/vcrmode.h"
 #include "in_buttons.h"
@@ -2286,6 +2287,35 @@ static float ScriptTraceLinePlayersIncluded( const Vector &vecStart, const Vecto
 	}
 }
 
+static INetworkStringTable * g_scriptDownloadables = NULL;
+static void AddToDownloadables( const char * pszFilePath )
+{
+	// TODO: Make this more SDK-like. This relies on the engine's internals, which while aren't gonna change any time soon, aren't documented by the SDK.
+	if ( !pszFilePath || !*pszFilePath ) {
+		Warning( "VScript error: AddToDownloadables was passed a null/empty string." );
+		return;
+	}
+	if ( Q_IsAbsolutePath( pszFilePath ) ) {
+		Warning( "VScript error: AddToDownloadables was passed an absolute path." );
+		return;
+	}
+	if ( V_strstr( pszFilePath, "..") ) {
+		Warning( "VScript error: AddToDownloadables was passed a path containing .." );
+		return;
+	}
+	if ( g_scriptDownloadables == NULL )
+		g_scriptDownloadables = networkstringtable->FindTable( "downloadables" );
+	g_scriptDownloadables->AddString( true, pszFilePath );
+}
+
+static bool IsInDownloadables( const char * pszFilePath )
+{
+	// Ditto as above.
+	if ( g_scriptDownloadables == NULL )
+		g_scriptDownloadables = networkstringtable->FindTable( "downloadables" );
+	return g_scriptDownloadables->FindStringIndex( pszFilePath ) != INVALID_STRING_INDEX;
+}
+
 #include "usermessages.h"
 
 #if defined ( PORTAL2 )
@@ -2600,6 +2630,9 @@ bool VScriptServerInit()
 				ScriptRegisterFunctionNamed( g_pScriptVM, ScriptDispatchParticleEffect, "DispatchParticleEffect", "Dispatches a one-off particle system" );
 				ScriptRegisterFunctionNamed( g_pScriptVM, ScriptSetSkyboxTexture, "SetSkyboxTexture", "Sets the current skybox texture" );
 
+				ScriptRegisterFunctionNamed( g_pScriptVM, AddToDownloadables, "AddToDownloadables", "Add a filepath to the download list. The filepath's existence is not checked, and will silently fail even when downloaded." );
+				ScriptRegisterFunctionNamed( g_pScriptVM, IsInDownloadables, "IsInDownloadables", "Return if a filepath is already in the download list. This includes filepaths not added by VScript." );
+
 #if defined ( PORTAL2 )
 				ScriptRegisterFunction( g_pScriptVM, SetDucking, "Set the level of an audio ducking channel" );
 #if defined( PORTAL2_PUZZLEMAKER )