Add ServerActiveObject::removingFromEnvironment()

src/environment.cpp

@@ -741,8 +741,12 @@ void ServerEnvironment::clearAllObjects()
 			obj->m_removed = true;
 			continue;
 		}
+
+		// Tell the object about removal
+		obj->removingFromEnvironment();
 		// Deregister in scripting api
 		scriptapi_rm_object_reference(m_lua, obj);
+
 		// Delete active object
 		delete obj;
 		// Id to be removed from m_active_objects
@@ -1395,6 +1399,8 @@ void ServerEnvironment::removeRemovedObjects()
 		if(obj->m_known_by_count > 0)
 			continue;
 		
+		// Tell the object about removal
+		obj->removingFromEnvironment();
 		// Deregister in scripting api
 		scriptapi_rm_object_reference(m_lua, obj);
 
@@ -1680,6 +1686,8 @@ void ServerEnvironment::deactivateFarObjects(bool force_delete)
 				<<"object id="<<id<<" is not known by clients"
 				<<"; deleting"<<std::endl;
 
+		// Tell the object about removal
+		obj->removingFromEnvironment();
 		// Deregister in scripting api
 		scriptapi_rm_object_reference(m_lua, obj);
 

src/serverobject.cpp

@@ -37,10 +37,6 @@ ServerActiveObject::~ServerActiveObject()
 {
 }
 
-void ServerActiveObject::addedToEnvironment()
-{
-}
-
 ServerActiveObject* ServerActiveObject::create(u8 type,
 		ServerEnvironment *env, u16 id, v3f pos,
 		const std::string &data)

src/serverobject.h

@@ -54,8 +54,10 @@ public:
 	ServerActiveObject(ServerEnvironment *env, v3f pos);
 	virtual ~ServerActiveObject();
 
-	// Call after id has been set and has been inserted in environment
-	virtual void addedToEnvironment();
+	// Called after id has been set and has been inserted in environment
+	virtual void addedToEnvironment(){};
+	// Called before removing from environment
+	virtual void removingFromEnvironment(){};
 	
 	// Create a certain type of ServerActiveObject
 	static ServerActiveObject* create(u8 type,
@@ -111,6 +113,11 @@ public:
 		the data is the static form)
 	*/
 	virtual std::string getStaticData(){return "";}
+	/*
+		Return false in here to never save and instead remove object
+		on unload. getStaticData() will not be called in that case.
+	*/
+	virtual bool isStaticAllowed(){return true;}
 	
 	virtual void punch(ServerActiveObject *puncher){}
 	virtual void rightClick(ServerActiveObject *clicker){}