From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Fri, 29 Nov 2019 22:10:12 -0600
Subject: [PATCH] Villagers follow emerald blocks


diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/TemptGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/TemptGoal.java
index 79bb13c5614bab1f0749c5f8f57f762c6216c564..2cbc9adc8e417def48be03d08174a5833068ec65 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/TemptGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/TemptGoal.java
@@ -62,7 +62,7 @@ public class TemptGoal extends Goal {
     }
 
     private boolean shouldFollow(LivingEntity entity) {
-        return this.items.test(entity.getMainHandItem()) || this.items.test(entity.getOffhandItem());
+        return (this.items.test(entity.getMainHandItem()) || this.items.test(entity.getOffhandItem())) && (!(this.mob instanceof net.minecraft.world.entity.npc.Villager villager) || !villager.isSleeping()); // Purpur Fix #512
     }
 
     @Override
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 bd283f71cb05ffbe1fed39afb41ae54dc52ec297..d7ebbd785d89fc5c1fec1a020a259a94b2b78827 100644
--- a/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/AbstractVillager.java
@@ -43,6 +43,7 @@ import org.bukkit.event.entity.VillagerAcquireTradeEvent;
 // CraftBukkit end
 
 public abstract class AbstractVillager extends AgeableMob implements InventoryCarrier, Npc, Merchant {
+    static final net.minecraft.world.item.crafting.Ingredient TEMPT_ITEMS = net.minecraft.world.item.crafting.Ingredient.of(net.minecraft.world.level.block.Blocks.EMERALD_BLOCK.asItem()); // Purpur
 
     // CraftBukkit start
     private CraftMerchant craftMerchant;
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 783cdc4949549725c884cdc0edff485936c77de3..5264f4dea9901fa702bdd6fb7855385bcfe53b64 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -169,6 +169,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     @Override
     protected void registerGoals() {
         this.goalSelector.addGoal(0, new org.purpurmc.purpur.entity.ai.HasRider(this));
+        if (level.purpurConfig.villagerFollowEmeraldBlock) this.goalSelector.addGoal(3, new net.minecraft.world.entity.ai.goal.TemptGoal(this, 1.0D, TEMPT_ITEMS, false));
     }
 
     @Override
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 0bcfece84ac11f04671ed38a99b31da9f8b03858..2f0bcf917af26fb7628bda134b650a8b296091ea 100644
--- a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
+++ b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
@@ -104,6 +104,7 @@ public class WanderingTrader extends net.minecraft.world.entity.npc.AbstractVill
         this.goalSelector.addGoal(1, new PanicGoal(this, 0.5D));
         this.goalSelector.addGoal(1, new LookAtTradingPlayerGoal(this));
         this.goalSelector.addGoal(2, new WanderingTrader.WanderToPositionGoal(this, 2.0D, 0.35D));
+        if (level.purpurConfig.wanderingTraderFollowEmeraldBlock) this.goalSelector.addGoal(3, new net.minecraft.world.entity.ai.goal.TemptGoal(this, 1.0D, TEMPT_ITEMS, false)); // Purpur
         this.goalSelector.addGoal(4, new MoveTowardsRestrictionGoal(this, 0.35D));
         this.goalSelector.addGoal(8, new WaterAvoidingRandomStrollGoal(this, 0.35D));
         this.goalSelector.addGoal(9, new InteractGoal(this, Player.class, 3.0F, 1.0F));
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 965e7ccb8175c18bad8d1ed92a70792f0656bebb..f97e9a32c0f5e330a491e06d5341f68520e36664 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -1243,6 +1243,7 @@ public class PurpurWorldConfig {
     public double villagerMaxHealth = 20.0D;
     public int villagerBrainTicks = 1;
     public boolean villagerUseBrainTicksOnlyWhenLagging = true;
+    public boolean villagerFollowEmeraldBlock = false;
     private void villagerSettings() {
         villagerRidable = getBoolean("mobs.villager.ridable", villagerRidable);
         villagerRidableInWater = getBoolean("mobs.villager.ridable-in-water", villagerRidableInWater);
@@ -1254,6 +1255,7 @@ public class PurpurWorldConfig {
         villagerMaxHealth = getDouble("mobs.villager.attributes.max_health", villagerMaxHealth);
         villagerBrainTicks = getInt("mobs.villager.brain-ticks", villagerBrainTicks);
         villagerUseBrainTicksOnlyWhenLagging = getBoolean("mobs.villager.use-brain-ticks-only-when-lagging", villagerUseBrainTicksOnlyWhenLagging);
+        villagerFollowEmeraldBlock = getBoolean("mobs.villager.follow-emerald-blocks", villagerFollowEmeraldBlock);
     }
 
     public boolean vindicatorRidable = false;
@@ -1273,6 +1275,7 @@ public class PurpurWorldConfig {
     public boolean wanderingTraderRidable = false;
     public boolean wanderingTraderRidableInWater = false;
     public double wanderingTraderMaxHealth = 20.0D;
+    public boolean wanderingTraderFollowEmeraldBlock = false;
     private void wanderingTraderSettings() {
         wanderingTraderRidable = getBoolean("mobs.wandering_trader.ridable", wanderingTraderRidable);
         wanderingTraderRidableInWater = getBoolean("mobs.wandering_trader.ridable-in-water", wanderingTraderRidableInWater);
@@ -1282,6 +1285,7 @@ public class PurpurWorldConfig {
             set("mobs.wandering_trader.attributes.max_health", oldValue);
         }
         wanderingTraderMaxHealth = getDouble("mobs.wandering_trader.attributes.max_health", wanderingTraderMaxHealth);
+        wanderingTraderFollowEmeraldBlock = getBoolean("mobs.wandering_trader.follow-emerald-blocks", wanderingTraderFollowEmeraldBlock);
     }
 
     public boolean witchRidable = false;