Core/AuctionHouse: Updated AuctionHouseFilterMask and implemented current expansion filter

Port From (https://github.com/TrinityCore/TrinityCore/commit/5b278a4ca79dd8aa19cde3892d92ae857d6f1dd4)

Source/Framework/Constants/AuctionConst.cs

@@ -50,19 +50,20 @@ namespace Framework.Constants
     [Flags]
     public enum AuctionHouseFilterMask
     {
-        None = 0x0,
-        UncollectedOnly = 0x1,
-        UsableOnly = 0x2,
-        UpgradesOnly = 0x4,
-        ExactMatch = 0x8,
-        PoorQuality = 0x10,
-        CommonQuality = 0x20,
-        UncommonQuality = 0x40,
-        RareQuality = 0x80,
-        EpicQuality = 0x100,
-        LegendaryQuality = 0x200,
-        ArtifactQuality = 0x400,
-        LegendaryCraftedItemOnly = 0x800,
+        None = 0x00,
+        UncollectedOnly = 0x02,
+        UsableOnly = 0x04,
+        CurrentExpansionOnly = 0x08,
+        UpgradesOnly = 0x10,
+        ExactMatch = 0x20,
+        PoorQuality = 0x40,
+        CommonQuality = 0x80,
+        UncommonQuality = 0x100,
+        RareQuality = 0x200,
+        EpicQuality = 0x400,
+        LegendaryQuality = 0x800,
+        ArtifactQuality = 0x1000,
+        LegendaryCraftedItemOnly = 0x2000,
     }
 
     public enum AuctionHouseSortOrder

Source/Game/AuctionHouse/AuctionManager.cs

@@ -625,7 +625,7 @@ namespace Game
                 }
             }
 
-            bucket.QualityMask |= (AuctionHouseFilterMask)(1 << ((int)quality + 4));
+            bucket.QualityMask |= (AuctionHouseFilterMask)((uint)AuctionHouseFilterMask.PoorQuality << (int)quality);
             ++bucket.QualityCounts[quality];
 
             if (trans != null)
@@ -733,7 +733,7 @@ namespace Game
                 }
 
                 if (--bucket.QualityCounts[quality] == 0)
-                    bucket.QualityMask &= (AuctionHouseFilterMask)(~(1 << ((int)quality + 4)));
+                    bucket.QualityMask &= (AuctionHouseFilterMask)((uint)AuctionHouseFilterMask.PoorQuality << (int)quality);
             }
             else
                 _buckets.Remove(bucket.Key);
@@ -937,6 +937,13 @@ namespace Game
                         continue;
                 }
 
+                if (filters.HasFlag(AuctionHouseFilterMask.CurrentExpansionOnly))
+                {
+                    ItemTemplate itemTemplate = Global.ObjectMgr.GetItemTemplate(bucket.Key.ItemId);
+                    if (itemTemplate.GetRequiredExpansion() != WorldConfig.GetIntValue(WorldCfg.Expansion))
+                        continue;
+                }
+
                 // TODO: this one needs to access loot history to know highest item level for every inventory type
                 //if (filters.HasFlag(AuctionHouseFilterMask.UpgradesOnly))
                 //{