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.

1 files changed, 109 insertions, 0 deletions

diff --git a/src/config/lua/objects/LuaTimer.cpp b/src/config/lua/objects/LuaTimer.cpp
new file mode 100644
index 00000000..46f9a519
--- /dev/null
+++ b/src/config/lua/objects/LuaTimer.cpp
@@ -0,0 +1,109 @@
+#include "LuaTimer.hpp"
+
+#include <algorithm>
+#include <string_view>
+
+using namespace Config::Lua;
+
+static constexpr const char* MT = "HL.Timer";
+
+namespace {
+    struct STimerRef {
+        WP<CEventLoopTimer> timer;
+        int                 timeoutMs = 0;
+    };
+}
+
+static int timerEq(lua_State* L) {
+    const auto* lhs = sc<STimerRef*>(luaL_checkudata(L, 1, MT));
+    const auto* rhs = sc<STimerRef*>(luaL_checkudata(L, 2, MT));
+
+    lua_pushboolean(L, lhs->timer.lock() == rhs->timer.lock());
+    return 1;
+}
+
+static int timerToString(lua_State* L) {
+    const auto* ref   = sc<STimerRef*>(luaL_checkudata(L, 1, MT));
+    const auto  timer = ref->timer.lock();
+
+    if (!timer)
+        lua_pushstring(L, "HL.Timer(expired)");
+    else
+        lua_pushfstring(L, "HL.Timer(%p)", timer.get());
+
+    return 1;
+}
+
+static int timerSetEnabled(lua_State* L) {
+    auto* ref = sc<STimerRef*>(luaL_checkudata(L, 1, MT));
+    luaL_checktype(L, 2, LUA_TBOOLEAN);
+
+    const auto timer = ref->timer.lock();
+    if (!timer)
+        return 0;
+
+    if (lua_toboolean(L, 2))
+        timer->updateTimeout(std::chrono::milliseconds(std::max(ref->timeoutMs, 1)));
+    else
+        timer->updateTimeout(std::nullopt);
+
+    return 0;
+}
+
+static int timerSetTimeout(lua_State* L) {
+    auto* ref = sc<STimerRef*>(luaL_checkudata(L, 1, MT));
+    luaL_checktype(L, 2, LUA_TNUMBER);
+
+    const auto timer = ref->timer.lock();
+    if (!timer)
+        return 0;
+
+    uint64_t x = lua_tointeger(L, 2);
+
+    if (x < 1)
+        return Config::Lua::Bindings::Internal::configError(L, "hl.timer:set_timeout: timeout must be greater or equal to 1ms");
+
+    timer->updateTimeout(std::chrono::milliseconds(x));
+    ref->timeoutMs = x;
+
+    return 0;
+}
+
+static int timerIsEnabled(lua_State* L) {
+    auto*      ref = sc<STimerRef*>(luaL_checkudata(L, 1, MT));
+
+    const auto timer = ref->timer.lock();
+    if (!timer) {
+        lua_pushnil(L);
+        return 1;
+    }
+
+    lua_pushboolean(L, timer->armed());
+    return 1;
+}
+
+static int timerIndex(lua_State* L) {
+    luaL_checkudata(L, 1, MT);
+    const std::string_view key = luaL_checkstring(L, 2);
+
+    if (key == "set_enabled")
+        lua_pushcfunction(L, timerSetEnabled);
+    else if (key == "is_enabled")
+        lua_pushcfunction(L, timerIsEnabled);
+    else if (key == "set_timeout")
+        lua_pushcfunction(L, timerSetTimeout);
+    else
+        lua_pushnil(L);
+
+    return 1;
+}
+
+void Objects::CLuaTimer::setup(lua_State* L) {
+    registerMetatable(L, MT, timerIndex, gcRef<STimerRef>, timerEq, timerToString);
+}
+
+void Objects::CLuaTimer::push(lua_State* L, const SP<CEventLoopTimer>& timer, int timeoutMs) {
+    new (lua_newuserdata(L, sizeof(STimerRef))) STimerRef{WP<CEventLoopTimer>(timer), timeoutMs};
+    luaL_getmetatable(L, MT);
+    lua_setmetatable(L, -2);
+}