Core/Event: prevent seasonal quests from resetting at server restart (#17455)

Closes #16015.
Closes #16413.
(cherry picked from commit fb6d4dd98f66ec67f7c5ddf698b3e6a0b44925b4)

1 files changed, 12 insertions, 2 deletions

diff --git a/src/server/game/Events/GameEventMgr.cpp b/src/server/game/Events/GameEventMgr.cpp
index 213f90453a1..a3ef39313d2 100644
--- a/src/server/game/Events/GameEventMgr.cpp
+++ b/src/server/game/Events/GameEventMgr.cpp
@@ -139,6 +139,9 @@ bool GameEventMgr::StartEvent(uint16 event_id, bool overwrite)
             if (data.end <= data.start)
                 data.end = data.start + data.length;
         }
+
+        // When event is started, set its worldstate to current time
+        sWorld->setWorldState(event_id, time(NULL));
         return false;
     }
     else
@@ -174,6 +177,9 @@ void GameEventMgr::StopEvent(uint16 event_id, bool overwrite)
     RemoveActiveEvent(event_id);
     UnApplyEvent(event_id);
 
+    // When event is stopped, clean up its worldstate
+    sWorld->setWorldState(event_id, 0);
+
     if (overwrite && !serverwide_evt)
     {
         data.start = time(NULL) - data.length * MINUTE;
@@ -1034,6 +1040,8 @@ uint32 GameEventMgr::Update()                               // return the next e
         }
         else
         {
+            // If event is inactive, periodically clean up its worldstate
+            sWorld->setWorldState(itr, 0);
             //TC_LOG_DEBUG("misc", "GameEvent %u is not active", itr->first);
             if (IsActiveEvent(itr))
                 deactivate.insert(itr);
@@ -1116,8 +1124,10 @@ void GameEventMgr::ApplyNewEvent(uint16 event_id)
     UpdateEventNPCVendor(event_id, true);
     // update bg holiday
     UpdateBattlegroundSettings();
-    // check for seasonal quest reset.
-    sWorld->ResetEventSeasonalQuests(event_id);
+    // If event's worldstate is 0, it means the event hasn't been started yet. In that case, reset seasonal quests.
+    // When event ends (if it expires or if it's stopped via commands) worldstate will be set to 0 again, ready for another seasonal quest reset.
+    if (sWorld->getWorldState(event_id) == 0)
+        sWorld->ResetEventSeasonalQuests(event_id);
 }
 
 void GameEventMgr::UpdateEventNPCFlags(uint16 event_id)