#1144: Add more Guardian API, particularly for its laser

By: Parker Hawke <hawkeboyz2@hotmail.com>

paper-server/nms-patches/net/minecraft/world/entity/monster/EntityGuardian.patch

@@ -0,0 +1,19 @@
+--- a/net/minecraft/world/entity/monster/EntityGuardian.java
++++ b/net/minecraft/world/entity/monster/EntityGuardian.java
+@@ -62,6 +62,7 @@
+     private boolean clientSideTouchedGround;
+     @Nullable
+     public PathfinderGoalRandomStroll randomStrollGoal;
++    public EntityGuardian.PathfinderGoalGuardianAttack guardianAttackGoal; // CraftBukkit - add field
+ 
+     public EntityGuardian(EntityTypes<? extends EntityGuardian> entitytypes, World world) {
+         super(entitytypes, world);
+@@ -77,7 +78,7 @@
+         PathfinderGoalMoveTowardsRestriction pathfindergoalmovetowardsrestriction = new PathfinderGoalMoveTowardsRestriction(this, 1.0D);
+ 
+         this.randomStrollGoal = new PathfinderGoalRandomStroll(this, 1.0D, 80);
+-        this.goalSelector.addGoal(4, new EntityGuardian.PathfinderGoalGuardianAttack(this));
++        this.goalSelector.addGoal(4, guardianAttackGoal = new EntityGuardian.PathfinderGoalGuardianAttack(this)); // CraftBukkit - assign field
+         this.goalSelector.addGoal(5, pathfindergoalmovetowardsrestriction);
+         this.goalSelector.addGoal(7, this.randomStrollGoal);
+         this.goalSelector.addGoal(8, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 8.0F));

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftGuardian.java

@@ -1,5 +1,6 @@
 package org.bukkit.craftbukkit.entity;
 
+import com.google.common.base.Preconditions;
 import net.minecraft.world.entity.monster.EntityGuardian;
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.entity.EntityType;
@@ -8,6 +9,8 @@ import org.bukkit.entity.LivingEntity;
 
 public class CraftGuardian extends CraftMonster implements Guardian {
 
+    private static final int MINIMUM_ATTACK_TICKS = -10;
+
     public CraftGuardian(CraftServer server, EntityGuardian entity) {
         super(server, entity);
     }
@@ -58,6 +61,27 @@ public class CraftGuardian extends CraftMonster implements Guardian {
         return getHandle().hasActiveAttackTarget();
     }
 
+    @Override
+    public int getLaserDuration() {
+        return getHandle().getAttackDuration();
+    }
+
+    @Override
+    public void setLaserTicks(int ticks) {
+        Preconditions.checkArgument(ticks >= MINIMUM_ATTACK_TICKS, "ticks must be >= %s. Given %s", MINIMUM_ATTACK_TICKS, ticks);
+
+        EntityGuardian.PathfinderGoalGuardianAttack goal = getHandle().guardianAttackGoal;
+        if (goal != null) {
+            goal.attackTime = ticks;
+        }
+    }
+
+    @Override
+    public int getLaserTicks() {
+        EntityGuardian.PathfinderGoalGuardianAttack goal = getHandle().guardianAttackGoal;
+        return (goal != null) ? goal.attackTime : MINIMUM_ATTACK_TICKS;
+    }
+
     @Override
     public boolean isElder() {
         return false;
@@ -67,4 +91,9 @@ public class CraftGuardian extends CraftMonster implements Guardian {
     public void setElder(boolean shouldBeElder) {
         throw new UnsupportedOperationException("Not supported.");
     }
+
+    @Override
+    public boolean isMoving() {
+        return getHandle().isMoving();
+    }
 }