Core/Maps: move pooling hand-off outside of Map::CheckRespawn (PR#25785)

fixes #25777

src/server/game/Maps/Map.cpp

@@ -3036,47 +3036,42 @@ bool Map::CheckRespawn(RespawnInfo* info)
         return false;
     }
 
-    uint32 poolId = info->spawnId ? sPoolMgr->IsPartOfAPool(info->type, info->spawnId) : 0;
     // Next, check if there's already an instance of this object that would block the respawn
-    // Only do this for unpooled spawns
-    if (!poolId)
+    bool alreadyExists = false;
+    switch (info->type)
     {
-        bool doDelete = false;
-        switch (info->type)
+        case SPAWN_TYPE_CREATURE:
         {
-            case SPAWN_TYPE_CREATURE:
-            {
-                // escort check for creatures only (if the world config boolean is set)
-                bool const isEscort = (sWorld->getBoolConfig(CONFIG_RESPAWN_DYNAMIC_ESCORTNPC) && data->spawnGroupData->flags & SPAWNGROUP_FLAG_ESCORTQUESTNPC);
+            // escort check for creatures only (if the world config boolean is set)
+            bool const isEscort = (sWorld->getBoolConfig(CONFIG_RESPAWN_DYNAMIC_ESCORTNPC) && data->spawnGroupData->flags & SPAWNGROUP_FLAG_ESCORTQUESTNPC);
 
-                auto range = _creatureBySpawnIdStore.equal_range(info->spawnId);
-                for (auto it = range.first; it != range.second; ++it)
-                {
-                    Creature* creature = it->second;
-                    if (!creature->IsAlive())
-                        continue;
-                    // escort NPCs are allowed to respawn as long as all other instances are already escorting
-                    if (isEscort && creature->IsEscorted())
-                        continue;
-                    doDelete = true;
-                    break;
-                }
+            auto range = _creatureBySpawnIdStore.equal_range(info->spawnId);
+            for (auto it = range.first; it != range.second; ++it)
+            {
+                Creature* creature = it->second;
+                if (!creature->IsAlive())
+                    continue;
+                // escort NPCs are allowed to respawn as long as all other instances are already escorting
+                if (isEscort && creature->IsEscorted())
+                    continue;
+                alreadyExists = true;
                 break;
             }
-            case SPAWN_TYPE_GAMEOBJECT:
-                // gameobject check is simpler - they cannot be dead or escorting
-                if (_gameobjectBySpawnIdStore.find(info->spawnId) != _gameobjectBySpawnIdStore.end())
-                    doDelete = true;
-                break;
-            default:
-                ABORT_MSG("Invalid spawn type %u with spawnId %u on map %u", uint32(info->type), info->spawnId, GetId());
-                return true;
-        }
-        if (doDelete)
-        {
-            info->respawnTime = 0;
-            return false;
+            break;
         }
+        case SPAWN_TYPE_GAMEOBJECT:
+            // gameobject check is simpler - they cannot be dead or escorting
+            if (_gameobjectBySpawnIdStore.find(info->spawnId) != _gameobjectBySpawnIdStore.end())
+                alreadyExists = true;
+            break;
+        default:
+            ABORT_MSG("Invalid spawn type %u with spawnId %u on map %u", uint32(info->type), info->spawnId, GetId());
+            return true;
+    }
+    if (alreadyExists)
+    {
+        info->respawnTime = 0;
+        return false;
     }
 
     // next, check linked respawn time
@@ -3094,21 +3089,6 @@ bool Map::CheckRespawn(RespawnInfo* info)
         info->respawnTime = respawnTime;
         return false;
     }
-
-    // now, check if we're part of a pool
-    if (poolId)
-    {
-        // ok, part of a pool - hand off to pool logic to handle this, we're just going to remove the respawn and call it a day
-        if (info->type == SPAWN_TYPE_GAMEOBJECT)
-            sPoolMgr->UpdatePool<GameObject>(poolId, info->spawnId);
-        else if (info->type == SPAWN_TYPE_CREATURE)
-            sPoolMgr->UpdatePool<Creature>(poolId, info->spawnId);
-        else
-            ABORT_MSG("Invalid spawn type %u (spawnid %u) on map %u", uint32(info->type), info->spawnId, GetId());
-        info->respawnTime = 0;
-        return false;
-    }
-
     // everything ok, let's spawn
     return true;
 }
@@ -3275,22 +3255,39 @@ void Map::ProcessRespawns()
         RespawnInfo* next = _respawnTimes.top();
         if (now < next->respawnTime) // done for this tick
             break;
-        if (CheckRespawn(next)) // see if we're allowed to respawn
-        {
-            // ok, respawn
+
+        if (uint32 poolId = sPoolMgr->IsPartOfAPool(next->type, next->spawnId)) // is this part of a pool?
+        { // if yes, respawn will be handled by (external) pooling logic, just delete the respawn time
+            // step 1: remove entry from maps to avoid it being reachable by outside logic
             _respawnTimes.pop();
             GetRespawnMapForType(next->type).erase(next->spawnId);
+
+            // step 2: tell pooling logic to do its thing
+            sPoolMgr->UpdatePool(poolId, next->type, next->spawnId);
+
+            // step 3: get rid of the actual entry
+            delete next;
+        }
+        else if (CheckRespawn(next)) // see if we're allowed to respawn
+        { // ok, respawn
+            // step 1: remove entry from maps to avoid it being reachable by outside logic
+            _respawnTimes.pop();
+            GetRespawnMapForType(next->type).erase(next->spawnId);
+
+            // step 2: do the respawn, which involves external logic
             DoRespawn(next->type, next->spawnId, next->gridId);
+
+            // step 3: get rid of the actual entry
             delete next;
         }
-        else if (!next->respawnTime) // just remove respawn entry without rescheduling
-        {
+        else if (!next->respawnTime)
+        { // just remove this respawn entry without rescheduling
             _respawnTimes.pop();
             GetRespawnMapForType(next->type).erase(next->spawnId);
             delete next;
         }
-        else // value changed, update heap position
-        {
+        else
+        { // new respawn time, update heap position
             ASSERT(now < next->respawnTime); // infinite loop guard
             _respawnTimes.decrease(next->handle);
             SaveRespawnInfoDB(*next);

src/server/game/Pools/PoolMgr.cpp

@@ -845,3 +845,18 @@ void PoolMgr::UpdatePool(uint32 pool_id, uint32 db_guid_or_pool_id)
 template void PoolMgr::UpdatePool<Pool>(uint32 pool_id, uint32 db_guid_or_pool_id);
 template void PoolMgr::UpdatePool<GameObject>(uint32 pool_id, uint32 db_guid_or_pool_id);
 template void PoolMgr::UpdatePool<Creature>(uint32 pool_id, uint32 db_guid_or_pool_id);
+
+void PoolMgr::UpdatePool(uint32 pool_id, SpawnObjectType type, uint32 spawnId)
+{
+    switch (type)
+    {
+        case SPAWN_TYPE_CREATURE:
+            UpdatePool<Creature>(pool_id, spawnId);
+            break;
+        case SPAWN_TYPE_GAMEOBJECT:
+            UpdatePool<GameObject>(pool_id, spawnId);
+            break;
+        default:
+            ABORT_MSG("Invalid spawn type %u passed to PoolMgr::IsPartOfPool (with spawnId %u)", uint32(type), spawnId);
+    }
+}

src/server/game/Pools/PoolMgr.h

@@ -120,6 +120,7 @@ class TC_GAME_API PoolMgr
 
         template<typename T>
         void UpdatePool(uint32 pool_id, uint32 db_guid_or_pool_id);
+        void UpdatePool(uint32 pool_id, SpawnObjectType type, ObjectGuid::LowType spawnId);
 
     private:
         template<typename T>