Creatures update server-side

server/creatures/creature_data.cpp

@@ -21,6 +21,9 @@
 */
 #include "creature_data.hpp"
 
+#include <sstream>
+#include <stdexcept>
+
 CreatureData::CreatureData(std::string _avatar, int _scriptRef):
 	Entity("creature"),
 	avatar(_avatar),
@@ -29,9 +32,29 @@ CreatureData::CreatureData(std::string _avatar, int _scriptRef):
 	//EMPTY
 }
 
-void CreatureData::Update() {
-	Entity::Update();
-	//TODO: (0) call the script reference
+int CreatureData::Update(lua_State* L) {
+	int ret = 0;
+
+	if (scriptRef != 0) {
+		//Call the script reference
+		lua_pushinteger(L, scriptRef);
+		lua_gettable(L, LUA_REGISTRYINDEX);
+		lua_pushlightuserdata(L, reinterpret_cast<void*>(this));
+
+		//check for errors
+		if(lua_pcall(L, 1, 1, 0) != LUA_OK) {
+			std::ostringstream msg;
+			msg << "Error running creature script: " << lua_tostring(L, -1);
+			lua_pop(L, 1);
+			throw(std::runtime_error(msg.str()));
+		}
+
+		ret += lua_tonumber(L, -1);
+	}
+
+	ret += Entity::Update();
+
+	return ret;
 }
 
 //-------------------------

server/creatures/creature_data.hpp

@@ -39,7 +39,7 @@ public:
 	CreatureData(std::string avatar, int scriptRef);
 	~CreatureData() = default;
 
-	virtual void Update();
+	virtual int Update(lua_State*);
 
 	//accessors & mutators
 

server/creatures/creature_manager.cpp

@@ -29,9 +29,14 @@ CreatureManager::~CreatureManager() {
 	UnloadAll();
 }
 
-void CreatureManager::Update() {
+//arg: a list of creatures to be updated in the clients
+int CreatureManager::Update(std::list<CreatureData*>* creatureList) {
+	int ret;
 	for (auto& it : elementMap) {
-		it.second.Update();
+		ret = it.second.Update(lua);
+		if (ret) {
+			creatureList->push_back(&it.second);
+		}
 	}
 }
 

server/creatures/creature_manager.hpp

@@ -27,6 +27,7 @@
 #include "sqlite3.h"
 
 #include <functional>
+#include <list>
 #include <map>
 #include <string>
 
@@ -36,7 +37,7 @@ public:
 	~CreatureManager();
 
 	//common public methods
-	void Update();
+	int Update(std::list<CreatureData*>* creatureList);
 
 	int Create(std::string avatar, int scriptRef);
 	void Unload(int uid);