Wrote ManagerInterface, implemented it in RoomManager

ManagerInterface is a server-side pure abstract class; all of it's methods
are defined as pure virtual methods, and as such should be defined in the
derived classes. It works correctly along side the Singleton class, but
does not implement it directly as originally planned. It should also
support variadic parameters, which still need testing.

I've implemented ManagerInterface in RoomManager, but I've also disabled a
number of the RoomManager's features, including the lua interface. The
project as a whole should build, but it won't run correctly. The variadic
parameters will be tested using the other managers.

It feels good just playing around instead of pushing forward all the time.

server/rooms/room_manager.hpp

@@ -23,38 +23,39 @@
 #define ROOMMANAGER_HPP_
 
 #include "room_data.hpp"
+
 #include "singleton.hpp"
+#include "manager_interface.hpp"
 
 #include "lua/lua.hpp"
 
-#include <map>
-
-class RoomManager : public Singleton<RoomManager> {
+class RoomManager: public Singleton<RoomManager>, public ManagerInterface<RoomData> {
 public:
-	//public access methods
-	int CreateRoom();
-	void UnloadRoom(int uid);
-
-	RoomData* GetRoom(int uid);
-	RoomData* FindRoom(int uid);
-	int PushRoom(RoomData*);
-
-	void UnloadAll();
-
-	//accessors and mutators
-	std::map<int, RoomData*>* GetContainer() { return &roomMap; }
-
-	lua_State* SetLuaState(lua_State* L) { return luaState = L; }
-	lua_State* GetLuaState() { return luaState; }
-
-private:
-	friend Singleton<RoomManager>;
-
 	RoomManager() = default;
 	~RoomManager() = default;
 
-	std::map<int, RoomData*> roomMap;
-	lua_State* luaState = nullptr;
+	//common public methods
+	int Create() override;
+	int Load() override;
+	int Save(int uid) override;
+	void Unload(int uid) override;
+	void Delete(int uid) override;
+
+	void UnloadAll() override;
+	void UnloadIf(std::function<bool(std::pair<const int,RoomData>)> fn) override;
+
+	//accessors and mutators
+	RoomData* Get(int uid) override;
+	int GetLoadedCount() override;
+	int GetTotalCount() override;
+	std::map<int, RoomData>* GetContainer() override;
+
+	//hooks
+	lua_State* SetLuaState(lua_State* L) { return lua = L; }
+	lua_State* GetLuaState() { return lua; }
+
+private:
+	lua_State* lua = nullptr;
 	int counter = 0;
 };