[11129] Added WorldMap/WorldPersistentState subclass for non-instanceable maps.

This let have symmetric Map/MapPersistentState (sub)classes hierarchy.

src/game/MapPersistentStateMgr.h

@@ -38,21 +38,14 @@ class Group;
 
 class MapPersistentStateManager;
 
-/*
-    Holds the information necessary for creating a new map for non-instanceable maps
-
-    As object Used for non-instanceable Map only
-*/
 class MapPersistentState
 {
     friend class MapPersistentStateManager;
-    public:
-        /* Created either when:
-           - any new instance is being generated
-           - the first time a player bound to InstanceId logs in
-           - when a group bound to the instance is loaded */
+    protected:
         MapPersistentState(uint16 MapId, uint32 InstanceId, Difficulty difficulty);
 
+    public:
+
         /* Unloaded when m_playerList and m_groupList become empty
            or when the instance is reset */
         virtual ~MapPersistentState();
@@ -92,9 +85,15 @@ class MapPersistentState
         void SaveGORespawnTime(uint32 loguid, time_t t);
 
     protected:
-        virtual bool CanBeUnload() const;
+        virtual bool CanBeUnload() const =0
+        {
+            // prevent unload if used for loaded map
+            return !m_usedByMap;
+        }
+
         bool UnloadIfEmpty();
         void ClearRespawnTimes();
+        bool HasRespawnTimes() const { return m_creatureRespawnTimes.empty() && m_goRespawnTimes.empty(); }
 
     private:
         void SetCreatureRespawnTime(uint32 loguid, time_t t);
@@ -113,6 +112,21 @@ class MapPersistentState
         RespawnTimes m_goRespawnTimes;                      // lock MapPersistentState from unload, for example for temporary bound dungeon unload delay
 };
 
+class WorldPersistentState : public MapPersistentState
+{
+    public:
+        /* Created either when:
+           - any new non-instanceable map created
+           - respawn data loading for non-instanceable map
+        */
+        explicit WorldPersistentState(uint16 MapId) : MapPersistentState(MapId, 0, REGULAR_DIFFICULTY) {}
+
+        ~WorldPersistentState() {}
+
+    protected:
+        bool CanBeUnload() const;                           // overwrite MapPersistentState::CanBeUnload
+};
+
 /*
     Holds the information necessary for creating a new map for an existing instance
     Is referenced in three cases:
@@ -167,6 +181,7 @@ class DungeonPersistentState : public MapPersistentState
 
     protected:
         bool CanBeUnload() const;                           // overwrite MapPersistentState::CanBeUnload
+        bool HasBounds() const { return m_playerList.empty() && m_groupList.empty(); }
 
     private:
         typedef std::list<Player*> PlayerListType;
@@ -197,7 +212,6 @@ class BattleGroundPersistentState : public MapPersistentState
         bool CanBeUnload() const;                           // overwrite MapPersistentState::CanBeUnload
 };
 
-
 enum ResetEventType
 {
     RESET_EVENT_NORMAL_DUNGEON = 0,                         // no fixed reset time