Core/AuctionHouse: Fixed buying commodities

Port From (https://github.com/TrinityCore/TrinityCore/commit/61a7026f1765271595377be0c37a8228fe620c0d)

Source/Game/AuctionHouse/AuctionManager.cs

@@ -1138,7 +1138,11 @@ namespace Game
 
         public CommodityQuote CreateCommodityQuote(Player player, uint itemId, uint quantity)
         {
-            var bucketData = _buckets.LookupByKey(AuctionsBucketKey.ForCommodity(itemId));
+            ItemTemplate itemTemplate = Global.ObjectMgr.GetItemTemplate(itemId);
+            if (itemTemplate == null)
+                return null;
+
+            var bucketData = _buckets.LookupByKey(AuctionsBucketKey.ForCommodity(itemTemplate));
             if (bucketData == null)
                 return null;
 
@@ -1181,7 +1185,11 @@ namespace Game
 
         public bool BuyCommodity(SQLTransaction trans, Player player, uint itemId, uint quantity, TimeSpan delayForNextAction)
         {
-            var bucketItr = _buckets.LookupByKey(AuctionsBucketKey.ForCommodity(itemId));
+            ItemTemplate itemTemplate = Global.ObjectMgr.GetItemTemplate(itemId);
+            if (itemTemplate == null)
+                return false;
+
+            var bucketItr = _buckets.LookupByKey(AuctionsBucketKey.ForCommodity(itemTemplate));
             if (bucketItr == null)
             {
                 player.GetSession().SendAuctionCommandResult(0, AuctionCommand.PlaceBid, AuctionResult.CommodityPurchaseFailed, delayForNextAction);
@@ -1966,12 +1974,12 @@ namespace Game
                     (ushort)item.GetModifier(ItemModifier.BattlePetSpeciesId), (ushort)item.GetBonus().Suffix);
             }
             else
-                return ForCommodity(item.GetEntry());
+                return ForCommodity(itemTemplate);
         }
 
-        public static AuctionsBucketKey ForCommodity(uint itemId)
+        public static AuctionsBucketKey ForCommodity(ItemTemplate itemTemplate)
         {
-            return new AuctionsBucketKey(itemId, 0, 0, 0);
+            return new AuctionsBucketKey(itemTemplate.GetId(), (ushort)itemTemplate.GetBaseItemLevel(), 0, 0);
         }
     }
 

Source/Game/Handlers/AuctionHandler.cs

@@ -954,6 +954,7 @@ namespace Game
                 commodityQuoteResult.QuoteDuration.Set((int)(quote.ValidTo - GameTime.GetGameTimeSteadyPoint()).TotalMilliseconds);
             }
 
+            commodityQuoteResult.ItemID = getCommodityQuote.ItemID;
             commodityQuoteResult.DesiredDelay = (uint)throttle.DelayUntilNext.TotalSeconds;
 
             SendPacket(commodityQuoteResult);

Source/Game/Networking/Packets/AuctionHousePackets.cs

@@ -465,7 +465,7 @@ namespace Game.Networking.Packets
         public Optional<ulong> TotalPrice;
         public Optional<uint> Quantity;
         public Optional<int> QuoteDuration;
-        public int Unknown830;
+        public int ItemID;
         public uint DesiredDelay;
 
         public AuctionGetCommodityQuoteResult() : base(ServerOpcodes.AuctionGetCommodityQuoteResult) { }
@@ -475,7 +475,7 @@ namespace Game.Networking.Packets
             _worldPacket.WriteBit(TotalPrice.HasValue);
             _worldPacket.WriteBit(Quantity.HasValue);
             _worldPacket.WriteBit(QuoteDuration.HasValue);
-            _worldPacket.WriteInt32(Unknown830);
+            _worldPacket.WriteInt32(ItemID);
             _worldPacket.WriteUInt32(DesiredDelay);
 
             if (TotalPrice.HasValue)