Reimplemented the push/pop entity methods in RoomManager

Some accessors in Entity had to be made const, as they were being called
from lambdas with const parameters.

server/entities/entity.cpp

@@ -33,14 +33,14 @@ Vector2 Entity::SetMotion(Vector2 v) {
 	return motion = v;
 }
 
-int Entity::GetRoomIndex() {
+int Entity::GetRoomIndex() const {
 	return roomIndex;
 }
 
-Vector2 Entity::GetOrigin() {
+Vector2 Entity::GetOrigin() const {
 	return origin;
 }
 
-Vector2 Entity::GetMotion() {
+Vector2 Entity::GetMotion() const {
 	return motion;
 }

server/entities/entity.hpp

@@ -32,9 +32,9 @@ public:
 	Vector2 SetOrigin(Vector2 v);
 	Vector2 SetMotion(Vector2 v);
 
-	int GetRoomIndex();
-	Vector2 GetOrigin();
-	Vector2 GetMotion();
+	int GetRoomIndex() const;
+	Vector2 GetOrigin() const;
+	Vector2 GetMotion() const;
 
 protected:
 	Entity() = default;

server/rooms/room_manager.cpp

@@ -57,6 +57,37 @@ void RoomManager::UnloadIf(std::function<bool(std::pair<const int, RoomData cons
 	}
 }
 
+void RoomManager::PushEntity(Entity* entity) {
+	if (!entity) {
+		throw(std::runtime_error("Failed to push a null entity to a room"));
+	}
+
+	RoomData* room = Get(entity->GetRoomIndex());
+
+	if (!room) {
+		throw(std::runtime_error("Failed to push an entity to a non-existant room"));
+	}
+
+	room->entityList.push_back(entity);
+}
+
+void RoomManager::PopEntity(Entity const* entity) {
+	//NOTE: to pop an entity from a room, the entity must first exist
+	if (!entity) {
+		throw(std::runtime_error("Failed to pop a null entity to a room"));
+	}
+
+	RoomData* room = Get(entity->GetRoomIndex());
+
+	if (!room) {
+		throw(std::runtime_error("Failed to pop an entity to a non-existant room"));
+	}
+
+	room->entityList.remove_if([entity](Entity* ptr) {
+		return entity == ptr;
+	});
+}
+
 RoomData* RoomManager::Get(int uid) {
 	std::map<int, RoomData>::iterator it = elementMap.find(uid);
 

server/rooms/room_manager.hpp

@@ -22,6 +22,7 @@
 #ifndef ROOMMANAGER_HPP_
 #define ROOMMANAGER_HPP_
 
+#include "entity.hpp"
 #include "room_data.hpp"
 #include "singleton.hpp"
 
@@ -42,6 +43,9 @@ public:
 	void UnloadAll();
 	void UnloadIf(std::function<bool(std::pair<const int, RoomData const&>)> fn);
 
+	void PushEntity(Entity* entity);
+	void PopEntity(Entity const* entity);
+
 	//accessors and mutators
 	RoomData* Get(int uid);
 	RoomData* Get(std::string name);

server/server_character_methods.cpp

@@ -45,6 +45,9 @@ void ServerApplication::HandleCharacterCreate(CharacterPacket* const argPacket)
 		return;
 	}
 
+	//push to the rooms
+	roomMgr.PushEntity(characterMgr.Get(characterIndex));
+
 	//pump this character to all clients
 	CharacterPacket newPacket;
 	CopyCharacterToPacket(&newPacket, characterIndex);
@@ -86,6 +89,9 @@ void ServerApplication::HandleCharacterDelete(CharacterPacket* const argPacket)
 		return;
 	}
 
+	//pop from the rooms
+	roomMgr.PopEntity(characterMgr.Get(characterIndex));
+
 	//delete the character
 	characterMgr.Delete(characterIndex);
 
@@ -119,6 +125,9 @@ void ServerApplication::HandleCharacterLoad(CharacterPacket* const argPacket) {
 		return;
 	}
 
+	//push to the rooms
+	roomMgr.PushEntity(characterMgr.Get(characterIndex));
+
 	//pump this character to all clients
 	CharacterPacket newPacket;
 	CopyCharacterToPacket(&newPacket, characterIndex);
@@ -149,6 +158,9 @@ void ServerApplication::HandleCharacterUnload(CharacterPacket* const argPacket)
 		return;
 	}
 
+	//pop from the rooms
+	roomMgr.PopEntity(characterData);
+
 	//unload the character
 	characterMgr.Unload(argPacket->characterIndex);
 
@@ -190,11 +202,17 @@ void ServerApplication::HandleCharacterSetRoom(CharacterPacket* const argPacket)
 		return;
 	}
 
+	//pop from the old room
+	roomMgr.PopEntity(characterData);
+
 	//set the character's room, zero it's origin, zero it's motion
 	characterData->SetRoomIndex(argPacket->roomIndex);
 	characterData->SetOrigin({0, 0});
 	characterData->SetMotion({0, 0});
 
+	//push to the new room
+	roomMgr.PushEntity(characterData);
+
 	//update the clients
 	CharacterPacket newPacket;
 	CopyCharacterToPacket(&newPacket, argPacket->characterIndex);

server/server_methods.cpp

@@ -149,6 +149,9 @@ void ServerApplication::FullCharacterUnload(int index) {
 			return false;
 		}
 
+		//pop from the rooms
+		roomMgr.PopEntity(&character.second);
+
 		//pump character unload
 		CharacterPacket newPacket;
 		newPacket.type = SerialPacketType::CHARACTER_DELETE;