Core/Spells: Implemented SPELL_ATTR9_ITEM_PASSIVE_ON_CLIENT

Port From (https://github.com/TrinityCore/TrinityCore/commit/321161230fe557f930bb155729d9150c42c5758c)

Source/Game/Entities/Player/Player.Fields.cs

@@ -37,6 +37,7 @@ namespace Game.Entities
         public List<ItemSetEffect> ItemSetEff = new();
         List<EnchantDuration> m_enchantDuration = new();
         List<Item> m_itemDuration = new();
+        List<uint> m_itemPassives = new();
         List<ObjectGuid> m_itemSoulboundTradeable = new();
         List<ObjectGuid> m_refundableItems = new();
         public List<Item> ItemUpdateQueue = new();

Source/Game/Entities/Player/Player.Items.cs

@@ -2419,6 +2419,17 @@ namespace Game.Entities
             }
             return true;
         }
+
+        void SendItemPassives()
+        {
+            if (m_itemPassives.Empty())
+                return;
+
+            SendItemPassives sendItemPassives = new();
+            sendItemPassives.SpellID.AddRange(m_itemPassives);
+            SendPacket(sendItemPassives);
+        }
+
         public void SendNewItem(Item item, uint quantity, bool pushed, bool created, bool broadcast = false, uint dungeonEncounterId = 0)
         {
             if (item == null) // prevent crash
@@ -3785,6 +3796,17 @@ namespace Game.Entities
 
                 Log.outDebug(LogFilter.Player, "WORLD: cast {0} Equip spellId - {1}", (item != null ? "item" : "itemset"), spellInfo.Id);
 
+                if (spellInfo.HasAttribute(SpellAttr9.ItemPassiveOnClient))
+                {
+                    m_itemPassives.Add(spellInfo.Id);
+                    if (IsInWorld)
+                    {
+                        AddItemPassive addItemPassive = new();
+                        addItemPassive.SpellID = spellInfo.Id;
+                        SendPacket(addItemPassive);
+                    }
+                }
+
                 CastSpell(this, spellInfo.Id, new CastSpellExtraArgs(item));
             }
             else
@@ -3796,6 +3818,17 @@ namespace Game.Entities
                         return;                                     // and remove only not compatible at form change
                 }
 
+                if (spellInfo.HasAttribute(SpellAttr9.ItemPassiveOnClient))
+                {
+                    m_itemPassives.Remove(spellInfo.Id);
+                    if (IsInWorld)
+                    {
+                        RemoveItemPassive removeItemPassive = new();
+                        removeItemPassive.SpellID = spellInfo.Id;
+                        SendPacket(removeItemPassive);
+                    }
+                }
+
                 if (item != null)
                     RemoveAurasDueToItemSpell(spellInfo.Id, item.GetGUID());  // un-apply all spells, not only at-equipped
                 else

Source/Game/Entities/Player/Player.cs

@@ -5798,6 +5798,7 @@ namespace Game.Entities
             SendAurasForTarget(this);
             SendEnchantmentDurations();                             // must be after add to map
             SendItemDurations();                                    // must be after add to map
+            SendItemPassives();                                     // must be after add to map
 
             // raid downscaling - send difficulty to player
             if (GetMap().IsRaid())