scripting.h fix + input library

src/logic/scripting/lua/LuaState.cpp

@@ -127,13 +127,14 @@ void lua::LuaState::createLibs() {
     openlib("core", corelib, 0);
     openlib("file", filelib, 0);
     openlib("gui", guilib, 0);
+    openlib("input", inputlib, 0);
     openlib("inventory", inventorylib, 0);
     openlib("item", itemlib, 0);
+    openlib("json", jsonlib, 0);
     openlib("pack", packlib, 0);
     openlib("player", playerlib, 0);
     openlib("time", timelib, 0);
     openlib("world", worldlib, 0);
-    openlib("json", jsonlib, 0);
 
     addfunc("print", lua_wrap_errors<l_print>);
 }
@@ -426,6 +427,17 @@ void lua::LuaState::removeEnvironment(int id) {
     logger.debug() << "removed environment " << envName(id);
 }
 
+bool lua::LuaState::emit_event(const std::string &name, std::function<int(lua::LuaState *)> args) {
+    getglobal("events");
+    getfield("emit");
+    pushstring(name);
+    callNoThrow(args(this) + 1);
+    bool result = toboolean(-1);
+    pop(2);
+    return result;
+}
+
+
 void lua::LuaState::dumpStack() {
     int top = gettop();
     for (int i = 1; i <= top; i++) {

src/logic/scripting/lua/LuaState.h

@@ -67,6 +67,7 @@ namespace lua {
         int createEnvironment(int parent);
         void removeEnvironment(int id);
         const std::string storeAnonymous();
+        bool emit_event(const std::string& name, std::function<int(lua::LuaState*)> args=[](auto*){return 0;});
 
         void dumpStack();
     };

src/logic/scripting/lua/api_lua.h

@@ -18,7 +18,7 @@ extern const luaL_Reg playerlib [];
 extern const luaL_Reg timelib [];
 extern const luaL_Reg worldlib [];
 extern const luaL_Reg jsonlib [];
-
+extern const luaL_Reg inputlib [];
 
 // Lua Overrides
 extern int l_print(lua_State* L);

src/logic/scripting/lua/libcore.cpp

@@ -1,5 +1,6 @@
 #include "lua_commons.h"
 #include "api_lua.h"
+#include "LuaState.h"
 
 #include "../../../engine.h"
 #include "../../../files/settings_io.hpp"

src/logic/scripting/lua/libinput.cpp

@@ -0,0 +1,26 @@
+#include "api_lua.h"
+#include "lua_commons.h"
+#include "../scripting.h"
+
+#include "../../../window/input.h"
+#include "../../../window/Events.h"
+#include "../../../frontend/screens/Screen.hpp"
+#include "../../../engine.h"
+
+#include "LuaState.h"
+
+namespace scripting {
+    extern lua::LuaState* state;
+}
+
+static int l_keycode(lua_State* L) {
+    const char* name = lua_tostring(L, 1);
+    lua_pushinteger(L, static_cast<int>(input_util::keycode_from(name)));
+    return 1;
+}
+
+const luaL_Reg inputlib [] = {
+    {"keycode", lua_wrap_errors<l_keycode>},
+    {NULL, NULL}
+};
+