Implemented entity.GetType() in lua

This will only work for userdata decented from the Entity base class.
Using something else results in undefined behavior.

server/entities/entity.cpp

@@ -21,6 +21,10 @@
 */
 #include "entity.hpp"
 
+Entity::Entity(const char* _type): type(_type) {
+	//EMPTY
+}
+
 void Entity::Update() {
 	origin += motion;
 }
@@ -55,4 +59,8 @@ Vector2 Entity::GetMotion() const {
 
 BoundingBox Entity::GetBounds() const {
 	return bounds;
+}
+
+const char* Entity::GetType() const {
+	return type;
 }

server/entities/entity.hpp

@@ -25,6 +25,8 @@
 #include "bounding_box.hpp"
 #include "vector2.hpp"
 
+#include <string>
+
 //The base class for all objects in the world
 class Entity {
 public:
@@ -41,14 +43,17 @@ public:
 	Vector2 GetMotion() const;
 	BoundingBox GetBounds() const;
 
+	const char* GetType() const;
+
 protected:
-	Entity() = default;
+	Entity(const char*);
 	virtual ~Entity() = default;
 
 	int roomIndex = -1;
-	Vector2 origin;
-	Vector2 motion;
-	BoundingBox bounds;
+	Vector2 origin = {0, 0};
+	Vector2 motion = {0, 0};
+	BoundingBox bounds = {0, 0, 0, 0};
+	const char* type;
 };
 
 #endif

server/entities/entity_api.cpp

@@ -82,6 +82,12 @@ static int getBounds(lua_State* L) {
 	return 4;
 }
 
+static int getType(lua_State* L) {
+	Entity* entity = static_cast<Entity*>(lua_touserdata(L, 1));
+	lua_pushstring(L, entity->GetType());
+	return 1;
+}
+
 static const luaL_Reg entityLib[] = {
 	{"SetRoomIndex", setRoomIndex},
 	{"SetOrigin", setOrigin},
@@ -91,6 +97,7 @@ static const luaL_Reg entityLib[] = {
 	{"GetOrigin", getOrigin},
 	{"GetMotion", getMotion},
 	{"GetBounds", getBounds},
+	{"GetType", getType},
 	{nullptr, nullptr}
 };