LeavesMC/leaves-server/minecraft-patches/features/0078-Force-Void-Trade.patch

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/net/minecraft/world/entity/npc/AbstractVillager.java b/net/minecraft/world/entity/npc/AbstractVillager.java
index ea7364f3cc9f339578232ba1103008a9ed50234a..99ec0cac20dac363cd5a6b97bddf900266fc4498 100644
--- a/net/minecraft/world/entity/npc/AbstractVillager.java
+++ b/net/minecraft/world/entity/npc/AbstractVillager.java
@@ -43,6 +43,7 @@ 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 level) {
         super(type, level);
@@ -144,7 +145,13 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     @Override
     public void processTrade(MerchantOffer offer, @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()) {
-            offer.increaseUses();
+            // Leaves start - force void trade
+            if (voidTrade) {
+                offer.increaseVoidUses();
+            } else {
+                offer.increaseUses();
+            }
+            // Leaves end - force void trade
         }
         if (event == null || event.isRewardingExp()) {
             this.rewardTradeXp(offer);
@@ -156,7 +163,7 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     @Override
     public void notifyTrade(MerchantOffer offer) {
         // offer.increaseUses(); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
-        this.ambientSoundTime = -this.getAmbientSoundInterval();
+        if (!voidTrade) this.ambientSoundTime = -this.getAmbientSoundInterval(); // Leaves - force void trade
         // this.rewardTradeXp(offer); // Paper - Add PlayerTradeEvent and PlayerPurchaseEvent
         if (this.tradingPlayer instanceof ServerPlayer) {
             CriteriaTriggers.TRADE.trigger((ServerPlayer)this.tradingPlayer, this, offer.getResult());
@@ -173,7 +180,7 @@ 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.makeSound(this.getTradeUpdatedSound(!stack.isEmpty()));
         }
     }
@@ -219,6 +226,12 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     }
 
     protected void stopTrading() {
+        // Leaves start - force void trade
+        this.voidTrade = false;
+        if (this.offers != null) {
+            this.offers.forEach(MerchantOffer::resetVoidUses);
+        }
+        // Leaves end - force void trade
         this.setTradingPlayer(null);
     }
 
@@ -297,4 +310,10 @@ public abstract class AbstractVillager extends AgeableMob implements InventoryCa
     public boolean stillValid(Player player) {
         return this.getTradingPlayer() == player && this.isAlive() && player.canInteractWithEntity(this, 4.0);
     }
+
+    // Leaves start - force void trade
+    public void setVoidTrade() {
+        this.voidTrade = true;
+    }
+    // Leaves end - force void trade
 }
diff --git a/net/minecraft/world/entity/npc/Villager.java b/net/minecraft/world/entity/npc/Villager.java
index d10a407bef7da29a24582e48d8ee599c981384c5..9fb83137caeee95d35bce9265e1f86cef1adac0e 100644
--- a/net/minecraft/world/entity/npc/Villager.java
+++ b/net/minecraft/world/entity/npc/Villager.java
@@ -384,6 +384,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     }
 
     private void startTrading(Player player) {
+        this.voidTrade = false; // Leaves - force void trade
         this.updateSpecialPrices(player);
         this.setTradingPlayer(player);
         this.openTradingScreen(player, this.getDisplayName(), this.getVillagerData().level());
@@ -623,8 +624,12 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     @Override
     protected void rewardTradeXp(MerchantOffer offer) {
         int i = 3 + this.random.nextInt(4);
-        this.villagerXp = 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/net/minecraft/world/entity/npc/WanderingTrader.java b/net/minecraft/world/entity/npc/WanderingTrader.java
index 4c7287c4a081b4e1f0049c8c9bdf6a42b51e8274..c87bf6a5cfaaa1a68cba6b734e67db49709c6c5b 100644
--- a/net/minecraft/world/entity/npc/WanderingTrader.java
+++ b/net/minecraft/world/entity/npc/WanderingTrader.java
@@ -124,9 +124,10 @@ public class WanderingTrader extends AbstractVillager implements Consumable.Over
                     return InteractionResult.CONSUME;
                 }
 
-                this.setTradingPlayer(player);
-                this.openTradingScreen(player, this.getDisplayName(), 1);
-            }
+                this.voidTrade = false; // Leaves - force void trade
+                    this.setTradingPlayer(player);
+                    this.openTradingScreen(player, this.getDisplayName(), 1);
+                }
 
             return InteractionResult.SUCCESS;
         } else {
diff --git a/net/minecraft/world/inventory/MerchantMenu.java b/net/minecraft/world/inventory/MerchantMenu.java
index ade7732b638b30ad0ae50605793cbf75754aad0e..8ca85b07ad3a9902359704bf7071146d99153959 100644
--- a/net/minecraft/world/inventory/MerchantMenu.java
+++ b/net/minecraft/world/inventory/MerchantMenu.java
@@ -25,7 +25,7 @@ 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/net/minecraft/world/item/trading/MerchantOffer.java b/net/minecraft/world/item/trading/MerchantOffer.java
index 6afeb92c2e00ca5b945b7c7de9257bd741d53c3d..f5b82f56a59dd150938e35dde0333e7ea91fd042 100644
--- a/net/minecraft/world/item/trading/MerchantOffer.java
+++ b/net/minecraft/world/item/trading/MerchantOffer.java
@@ -39,6 +39,7 @@ public class MerchantOffer {
     public float priceMultiplier;
     public int xp;
     public boolean ignoreDiscounts; // Paper - Add ignore discounts API
+    public int voidTradeUses; // Leaves - force void trade
 
     // CraftBukkit start
     private @javax.annotation.Nullable org.bukkit.craftbukkit.inventory.CraftMerchantRecipe bukkitHandle;
@@ -78,6 +79,7 @@ public class MerchantOffer {
         this.priceMultiplier = priceMultiplier;
         this.xp = xp;
         this.ignoreDiscounts = ignoreDiscounts; // Paper
+        this.voidTradeUses = 0; // Leaves - force void trade
     }
 
     public MerchantOffer(ItemCost baseCostA, ItemStack result, int maxUses, int xp, float priceMultiplier) {
@@ -167,6 +169,16 @@ public class MerchantOffer {
         this.uses++;
     }
 
+    // Leaves start - force void trade
+    public void increaseVoidUses() {
+        ++this.voidTradeUses;
+    }
+
+    public void resetVoidUses() {
+        this.voidTradeUses = 0;
+    }
+    // Leaves end - force void trade
+
     public int getDemand() {
         return this.demand;
     }
@@ -196,7 +208,7 @@ public class MerchantOffer {
     }
 
     public boolean isOutOfStock() {
-        return this.uses >= this.maxUses;
+        return this.uses + this.voidTradeUses >= this.maxUses; // Leaves - force void trade
     }
 
     public void setToOutOfStock() {
diff --git a/net/minecraft/world/level/block/EndGatewayBlock.java b/net/minecraft/world/level/block/EndGatewayBlock.java
index 6161cd82dade8b4119ab0b8ba84451d592ce5858..cc90b8ebfe8c5d451710c202c5e87433e2a45c7b 100644
--- a/net/minecraft/world/level/block/EndGatewayBlock.java
+++ b/net/minecraft/world/level/block/EndGatewayBlock.java
@@ -109,6 +109,17 @@ public class EndGatewayBlock extends BaseEntityBlock implements Portal {
     public TeleportTransition getPortalDestination(ServerLevel level, Entity entity, BlockPos pos) {
         if (level.getBlockEntity(pos) instanceof TheEndGatewayBlockEntity theEndGatewayBlockEntity) {
             Vec3 portalPosition = theEndGatewayBlockEntity.getPortalPosition(level, pos);
+
+            // Leaves start - force void trade
+            if (org.leavesmc.leaves.LeavesConfig.modify.forceVoidTrade && portalPosition != null && entity instanceof net.minecraft.server.level.ServerPlayer player) {
+                if (player.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
+
             if (portalPosition == null) {
                 return null;
             } else {