From 5ba33f846129f3e6c0505b19f94634b24505e828 Mon Sep 17 00:00:00 2001
From: Vaxry <43317083+vaxerski@users.noreply.github.com>
Date: Sun, 26 Apr 2026 15:16:36 +0100
Subject: config/lua: init lua config manager, use lua if available (#13817)

Adds a new lua config manager, which will automatically be used if there is a lua config present.
---
 src/config/lua/objects/LuaEventSubscription.cpp | 74 +++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 src/config/lua/objects/LuaEventSubscription.cpp

(limited to 'src/config/lua/objects/LuaEventSubscription.cpp')

diff --git a/src/config/lua/objects/LuaEventSubscription.cpp b/src/config/lua/objects/LuaEventSubscription.cpp
new file mode 100644
index 00000000..c37491d7
--- /dev/null
+++ b/src/config/lua/objects/LuaEventSubscription.cpp
@@ -0,0 +1,74 @@
+#include "LuaEventSubscription.hpp"
+
+#include <format>
+#include <string_view>
+
+using namespace Config::Lua;
+
+static constexpr const char* MT = "HL.EventSubscription";
+
+namespace {
+    struct SEventSubscriptionRef {
+        CLuaEventHandler* handler = nullptr;
+        uint64_t          handle  = 0;
+        bool              active  = false;
+    };
+}
+
+static int eventSubscriptionEq(lua_State* L) {
+    const auto* lhs = sc<SEventSubscriptionRef*>(luaL_checkudata(L, 1, MT));
+    const auto* rhs = sc<SEventSubscriptionRef*>(luaL_checkudata(L, 2, MT));
+
+    lua_pushboolean(L, lhs->handler == rhs->handler && lhs->handle == rhs->handle);
+    return 1;
+}
+
+static int eventSubscriptionToString(lua_State* L) {
+    const auto* ref = sc<SEventSubscriptionRef*>(luaL_checkudata(L, 1, MT));
+
+    const auto  str = std::format("HL.EventSubscription({},{})", ref->handle, ref->active ? "active" : "inactive");
+    lua_pushstring(L, str.c_str());
+    return 1;
+}
+
+static int eventSubscriptionRemove(lua_State* L) {
+    auto* ref = sc<SEventSubscriptionRef*>(luaL_checkudata(L, 1, MT));
+
+    if (!ref->active || !ref->handler)
+        return 0;
+
+    ref->handler->unregisterEvent(ref->handle);
+    ref->active = false;
+    return 0;
+}
+
+static int eventSubscriptionIsActive(lua_State* L) {
+    auto* ref = sc<SEventSubscriptionRef*>(luaL_checkudata(L, 1, MT));
+
+    lua_pushboolean(L, ref->active);
+    return 1;
+}
+
+static int eventSubscriptionIndex(lua_State* L) {
+    luaL_checkudata(L, 1, MT);
+    const std::string_view key = luaL_checkstring(L, 2);
+
+    if (key == "remove")
+        lua_pushcfunction(L, eventSubscriptionRemove);
+    else if (key == "is_active")
+        lua_pushcfunction(L, eventSubscriptionIsActive);
+    else
+        lua_pushnil(L);
+
+    return 1;
+}
+
+void Objects::CLuaEventSubscription::setup(lua_State* L) {
+    registerMetatable(L, MT, eventSubscriptionIndex, gcRef<SEventSubscriptionRef>, eventSubscriptionEq, eventSubscriptionToString);
+}
+
+void Objects::CLuaEventSubscription::push(lua_State* L, CLuaEventHandler* handler, uint64_t handle) {
+    new (lua_newuserdata(L, sizeof(SEventSubscriptionRef))) SEventSubscriptionRef{.handler = handler, .handle = handle, .active = true};
+    luaL_getmetatable(L, MT);
+    lua_setmetatable(L, -2);
+}
-- 
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