Core/Instances: Implemented DungeonEncounter.dbc for creating completed encounters mask to use in packets

Core/Dungeon Finder: Implemented new way of giving random dungeon rewards, linked to DungeonEncounter.dbc

src/server/game/Entities/Player/Player.cpp

@@ -68,6 +68,7 @@
 #include "WeatherMgr.h"
 #include "LFGMgr.h"
 #include "CharacterDatabaseCleaner.h"
+#include "InstanceScript.h"
 #include <cmath>
 
 #define ZONE_UPDATE_INTERVAL (1*IN_MILLISECONDS)
@@ -17709,6 +17710,10 @@ InstancePlayerBind* Player::BindToInstance(InstanceSave *save, bool permanent, b
 
 void Player::BindToInstance()
 {
+    // Player left the instance
+    if (_pendingBind->GetInstanceId() != GetInstanceId())
+        return;
+
     WorldPacket data(SMSG_INSTANCE_SAVE_CREATED, 4);
     data << uint32(0);
     GetSession()->SendPacket(&data);
@@ -22116,6 +22121,12 @@ bool Player::RewardPlayerAndGroupAtKill(Unit* pVictim)
                 KilledMonster(pVictim->ToCreature()->GetCreatureInfo(), pVictim->GetGUID());
         }
     }
+
+    // Credit encounter in instance
+    if (pVictim->GetTypeId() == TYPEID_UNIT && GetMap()->IsDungeon())
+        if (InstanceScript* instance = pVictim->GetInstanceScript())
+            instance->UpdateEncounterState(ENCOUNTER_CREDIT_KILL_CREATURE, pVictim->GetEntry(), pVictim);
+
     return xp || honored_kill;
 }