From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: violetc <58360096+s-yh-china@users.noreply.github.com>
Date: Thu, 14 Sep 2023 20:23:03 +0800
Subject: [PATCH] Force Void Trade


diff --git a/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java b/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
index e585eca535ceb2ed28334bc3c6949fcb4881a364..7162f7acfdca6985dfdac2661d4e94b1d781a185 100644
--- a/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
@@ -59,6 +59,7 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     @Nullable
     protected MerchantOffers offers;
     private final SimpleContainer inventory = new SimpleContainer(8, (org.bukkit.craftbukkit.entity.CraftAbstractVillager) this.getBukkitEntity()); // CraftBukkit add argument
+    protected boolean voidTrade = false; // Leaves - force void trade
 
     public AbstractVillager(EntityType<? extends AbstractVillager> type, Level world) {
         super(type, world);
@@ -149,7 +150,7 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     // Paper start
     @Override
     public void processTrade(MerchantOffer recipe, @Nullable io.papermc.paper.event.player.PlayerPurchaseEvent event) { // The MerchantRecipe passed in here is the one set by the PlayerPurchaseEvent
-        if (event == null || event.willIncreaseTradeUses()) {
+        if (!voidTrade && (event == null || event.willIncreaseTradeUses())) { // Leaves - force void trade
             recipe.increaseUses();
         }
         if (event == null || event.isRewardingExp()) {
@@ -162,7 +163,7 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     @Override
     public void notifyTrade(MerchantOffer offer) {
         // offer.increaseUses(); // Paper - handled in processTrade
-        this.ambientSoundTime = -this.getAmbientSoundInterval();
+        if (!voidTrade) this.ambientSoundTime = -this.getAmbientSoundInterval(); // Leaves - force void trade
         // this.rewardTradeXp(offer); // Paper - handled in processTrade
         if (this.tradingPlayer instanceof ServerPlayer) {
             CriteriaTriggers.TRADE.trigger((ServerPlayer) this.tradingPlayer, this, offer.getResult());
@@ -180,7 +181,7 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     @Override
     public void notifyTradeUpdated(ItemStack stack) {
         if (!this.level().isClientSide && this.ambientSoundTime > -this.getAmbientSoundInterval() + 20) {
-            this.ambientSoundTime = -this.getAmbientSoundInterval();
+            if (!voidTrade) this.ambientSoundTime = -this.getAmbientSoundInterval(); // Leaves - force void trade
             this.playSound(this.getTradeUpdatedSound(!stack.isEmpty()), this.getSoundVolume(), this.getVoicePitch());
         }
 
@@ -229,6 +230,7 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     }
 
     protected void stopTrading() {
+        this.voidTrade = false; // Leaves - force void trade
         this.setTradingPlayer((Player) null);
     }
 
@@ -308,4 +310,10 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     public boolean isClientSide() {
         return this.level().isClientSide;
     }
+
+    // Leaves start - force void trade
+    public void setVoidTrade() {
+        voidTrade = true;
+    }
+    // Leaves end - force void trade
 }
diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
index 452caefc36140937f31be7e67c2580970e64626c..957fefdc5d942e647148f5c5b673a942eea18928 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -347,6 +347,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     }
 
     private void startTrading(Player customer) {
+        this.voidTrade = false; // Leaves - force void trade
         this.updateSpecialPrices(customer);
         this.setTradingPlayer(customer);
         this.openTradingScreen(customer, this.getDisplayName(), this.getVillagerData().getLevel());
@@ -649,8 +650,12 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     protected void rewardTradeXp(MerchantOffer offer) {
         int i = 3 + this.random.nextInt(4);
 
-        this.villagerXp += offer.getXp();
-        this.lastTradedPlayer = this.getTradingPlayer();
+        // Leaves start - force void trade
+        if (!voidTrade) {
+            this.villagerXp += offer.getXp();
+            this.lastTradedPlayer = this.getTradingPlayer();
+        }
+        // Leaves end - force void trade
         if (this.shouldIncreaseLevel()) {
             this.updateMerchantTimer = 40;
             this.increaseProfessionLevelOnUpdate = true;
diff --git a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
index 3c2941d799c9acb3dd9e2b67b7092f4bba5ede17..bde29322bb3158ea99333247cf79ab62c311f581 100644
--- a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
+++ b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
@@ -120,6 +120,7 @@ public class WanderingTrader extends net.minecraft.world.entity.npc.AbstractVill
                 return InteractionResult.sidedSuccess(this.level().isClientSide);
             } else {
                 if (!this.level().isClientSide) {
+                    this.voidTrade = false; // Leaves - force void trade
                     this.setTradingPlayer(player);
                     this.openTradingScreen(player, this.getDisplayName(), 1);
                 }
diff --git a/src/main/java/net/minecraft/world/inventory/MerchantMenu.java b/src/main/java/net/minecraft/world/inventory/MerchantMenu.java
index 8eab7596e1f7d1beb9ab0d70d1310d26822262e9..55ae9ccbadeb3bb358dd04aadd7b32b14f5bc96f 100644
--- a/src/main/java/net/minecraft/world/inventory/MerchantMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/MerchantMenu.java
@@ -26,7 +26,7 @@ public class MerchantMenu extends AbstractContainerMenu {
     private static final int SELLSLOT2_X = 162;
     private static final int BUYSLOT_X = 220;
     private static final int ROW_Y = 37;
-    private final Merchant trader;
+    public final Merchant trader; // Leaves - private -> public
     private final MerchantContainer tradeContainer;
     private int merchantLevel;
     private boolean showProgressBar;
diff --git a/src/main/java/net/minecraft/world/level/block/entity/TheEndGatewayBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/TheEndGatewayBlockEntity.java
index 8c13b0ff5a34a66df0e087320e7bb6542fbf89fd..d9295fb332342f8f77798757e65d7eb2fa6d7a0f 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/TheEndGatewayBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/TheEndGatewayBlockEntity.java
@@ -225,6 +225,16 @@ public class TheEndGatewayBlockEntity extends TheEndPortalBlockEntity {
                         return;
                     }
 
+                    // Leaves start - force void trade
+                    if (top.leavesmc.leaves.LeavesConfig.forceVoidTrade) {
+                        if (((ServerPlayer) entity1).containerMenu instanceof net.minecraft.world.inventory.MerchantMenu merchantMenu) {
+                            if (merchantMenu.trader instanceof net.minecraft.world.entity.npc.AbstractVillager villager) {
+                                villager.setVoidTrade();
+                            }
+                        }
+                    }
+                    // Leaves end - force void trade
+
                     entity1.setPortalCooldown();
                     ((ServerPlayer) entity1).connection.teleport(teleEvent.getTo());
                     TheEndGatewayBlockEntity.triggerCooldown(world, pos, state, blockEntity); // CraftBukkit - call at end of method