From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Fri, 24 Aug 2018 08:18:42 -0500
Subject: [PATCH] Slime Pathfinder Events


diff --git a/src/main/java/net/minecraft/world/entity/monster/Slime.java b/src/main/java/net/minecraft/world/entity/monster/Slime.java
index 136ec2413b6fe4680d7f2e903d04c9984b37f4c0..7062ef1cfd7d6279a4c6693cbdb80da49f23c542 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Slime.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Slime.java
@@ -115,6 +115,7 @@ public class Slime extends Mob implements Enemy {
     @Override
     public void addAdditionalSaveData(CompoundTag nbt) {
         super.addAdditionalSaveData(nbt);
+        nbt.putBoolean("Paper.canWander", this.canWander); // Paper
         nbt.putInt("Size", this.getSize() - 1);
         nbt.putBoolean("wasOnGround", this.wasOnGround);
     }
@@ -123,6 +124,11 @@ public class Slime extends Mob implements Enemy {
     public void readAdditionalSaveData(CompoundTag nbt) {
         this.setSize(nbt.getInt("Size") + 1, false);
         super.readAdditionalSaveData(nbt);
+        // Paper start
+        if (nbt.contains("Paper.canWander")) {
+            this.canWander = nbt.getBoolean("Paper.canWander");
+        }
+        // Paper end
         this.wasOnGround = nbt.getBoolean("wasOnGround");
     }
 
@@ -475,7 +481,7 @@ public class Slime extends Mob implements Enemy {
 
         @Override
         public boolean canUse() {
-            return (this.slime.isInWater() || this.slime.isInLava()) && this.slime.getMoveControl() instanceof Slime.SlimeMoveControl;
+            return (this.slime.isInWater() || this.slime.isInLava()) && this.slime.getMoveControl() instanceof Slime.SlimeMoveControl && this.slime.canWander && new com.destroystokyo.paper.event.entity.SlimeSwimEvent((org.bukkit.entity.Slime) this.slime.getBukkitEntity()).callEvent(); // Paper - Slime pathfinder events
         }
 
         @Override
@@ -512,7 +518,15 @@ public class Slime extends Mob implements Enemy {
         public boolean canUse() {
             LivingEntity entityliving = this.slime.getTarget();
 
-            return entityliving == null ? false : (!this.slime.canAttack(entityliving) ? false : this.slime.getMoveControl() instanceof Slime.SlimeMoveControl);
+            // Paper start - Slime pathfinder events
+            if (entityliving == null || !entityliving.isAlive()) {
+                return false;
+            }
+            if (!this.slime.canAttack(entityliving)) {
+                return false;
+            }
+            return this.slime.getMoveControl() instanceof Slime.SlimeMoveControl && this.slime.canWander && new com.destroystokyo.paper.event.entity.SlimeTargetLivingEntityEvent((org.bukkit.entity.Slime) this.slime.getBukkitEntity(), (org.bukkit.entity.LivingEntity) entityliving.getBukkitEntity()).callEvent();
+            // Paper end - Slime pathfinder events
         }
 
         @Override
@@ -525,7 +539,15 @@ public class Slime extends Mob implements Enemy {
         public boolean canContinueToUse() {
             LivingEntity entityliving = this.slime.getTarget();
 
-            return entityliving == null ? false : (!this.slime.canAttack(entityliving) ? false : --this.growTiredTimer > 0);
+            // Paper start - Slime pathfinder events
+            if (entityliving == null || !entityliving.isAlive()) {
+                return false;
+            }
+            if (!this.slime.canAttack(entityliving)) {
+                return false;
+            }
+            return --this.growTiredTimer > 0 && this.slime.canWander && new com.destroystokyo.paper.event.entity.SlimeTargetLivingEntityEvent((org.bukkit.entity.Slime) this.slime.getBukkitEntity(), (org.bukkit.entity.LivingEntity) entityliving.getBukkitEntity()).callEvent();
+            // Paper end - Slime pathfinder events
         }
 
         @Override
@@ -548,6 +570,13 @@ public class Slime extends Mob implements Enemy {
             }
 
         }
+
+        // Paper start - Slime pathfinder events; clear timer and target when goal resets
+        public void stop() {
+            this.growTiredTimer = 0;
+            this.slime.setTarget(null);
+        }
+        // Paper end - Slime pathfinder events
     }
 
     private static class SlimeRandomDirectionGoal extends Goal {
@@ -563,7 +592,7 @@ public class Slime extends Mob implements Enemy {
 
         @Override
         public boolean canUse() {
-            return this.slime.getTarget() == null && (this.slime.onGround() || this.slime.isInWater() || this.slime.isInLava() || this.slime.hasEffect(MobEffects.LEVITATION)) && this.slime.getMoveControl() instanceof Slime.SlimeMoveControl;
+            return this.slime.getTarget() == null && (this.slime.onGround() || this.slime.isInWater() || this.slime.isInLava() || this.slime.hasEffect(MobEffects.LEVITATION)) && this.slime.getMoveControl() instanceof Slime.SlimeMoveControl && this.slime.canWander; // Paper - Slime pathfinder events
         }
 
         @Override
@@ -571,6 +600,11 @@ public class Slime extends Mob implements Enemy {
             if (--this.nextRandomizeTime <= 0) {
                 this.nextRandomizeTime = this.adjustedTickDelay(40 + this.slime.getRandom().nextInt(60));
                 this.chosenDegrees = (float) this.slime.getRandom().nextInt(360);
+                // Paper start - Slime pathfinder events
+                com.destroystokyo.paper.event.entity.SlimeChangeDirectionEvent event = new com.destroystokyo.paper.event.entity.SlimeChangeDirectionEvent((org.bukkit.entity.Slime) this.slime.getBukkitEntity(), this.chosenDegrees);
+                if (!this.slime.canWander || !event.callEvent()) return;
+                this.chosenDegrees = event.getNewYaw();
+                // Paper end - Slime pathfinder events
             }
 
             MoveControl controllermove = this.slime.getMoveControl();
@@ -593,7 +627,7 @@ public class Slime extends Mob implements Enemy {
 
         @Override
         public boolean canUse() {
-            return !this.slime.isPassenger();
+            return !this.slime.isPassenger() && this.slime.canWander && new com.destroystokyo.paper.event.entity.SlimeWanderEvent((org.bukkit.entity.Slime) this.slime.getBukkitEntity()).callEvent(); // Paper - Slime pathfinder events
         }
 
         @Override
@@ -606,4 +640,15 @@ public class Slime extends Mob implements Enemy {
 
         }
     }
+
+    // Paper start - Slime pathfinder events
+    private boolean canWander = true;
+    public boolean canWander() {
+        return canWander;
+    }
+
+    public void setWander(boolean canWander) {
+        this.canWander = canWander;
+    }
+    // Paper end - Slime pathfinder events
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java
index 3d991d9d9388108ec6d137950913209d61d132e7..3d9b7c0e128ea05bec5600c774e9685998b71cac 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java
@@ -28,4 +28,16 @@ public class CraftSlime extends CraftMob implements Slime, CraftEnemy {
     public String toString() {
         return "CraftSlime";
     }
+
+    // Paper start
+    @Override
+    public boolean canWander() {
+        return getHandle().canWander();
+    }
+
+    @Override
+    public void setWander(boolean canWander) {
+        getHandle().setWander(canWander);
+    }
+    // Paper end
 }
