Make the Avalian Trader less robotic, add Avali Feather

Content/Items/Materials/RGBass.cs

@@ -1,6 +1,8 @@
 using Terraria.ID;
 using Terraria;
 using Terraria.ModLoader;
+using Terraria.DataStructures;
+using Microsoft.Xna.Framework;
 
 namespace ForgottenWawiTech.Content.Items.Materials
 {
@@ -12,8 +14,37 @@ namespace ForgottenWawiTech.Content.Items.Materials
             Item.width = 20;
             Item.height = 20;
             Item.maxStack = 9999;
-            Item.rare = ItemRarityID.White;
+            Item.rare = ItemRarityID.Expert; // temp rarity until custom rarity is added
             Item.value = Item.buyPrice(gold: 10);
         }
+
+        public override void OnStack(Item source, int numTransfered)
+        {
+            // Mark that RGBass has been obtained in this world
+            ForgottenWawiTechSystem.hasObtainedRGBass = true;
+        }
+
+        public override bool OnPickup(Player player)
+        {
+            // Mark that RGBass has been obtained in this world
+            ForgottenWawiTechSystem.hasObtainedRGBass = true;
+            return true;
+        }
     }
-}
+    public class RGBassFishingPlayer : ModPlayer
+    {
+        public override void CatchFish(FishingAttempt attempt, ref int itemDrop, ref int npcSpawn, ref AdvancedPopupRequest sonar, ref Vector2 sonarPosition)
+        {
+            // Only if Moon Lord has been defeated
+            if (!NPC.downedMoonlord)
+                return;
+
+            bool inWater = !attempt.inLava && !attempt.inHoney;
+
+            if (inWater && Main.rand.NextBool(20)) // 5% chance (1 in 20)
+            {
+                itemDrop = ModContent.ItemType<RGBass>();
+            } 
+        }
+    }
+}