Implement LivingSetAttackTargetEvent.

Author: kitlith

patchwork-events-entity/src/main/java/com/patchworkmc/impl/event/entity/EntityEvents.java

@@ -22,6 +22,7 @@
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.entity.EntityJoinWorldEvent;
 import net.minecraftforge.event.entity.living.LivingAttackEvent;
+import net.minecraftforge.event.entity.living.LivingSetAttackTargetEvent;
 import net.minecraftforge.event.entity.living.LivingDeathEvent;
 import net.minecraftforge.event.entity.living.LivingHurtEvent;
 import net.minecraftforge.event.entity.living.LivingSpawnEvent;
@@ -82,6 +83,10 @@ public static boolean onLivingAttack(LivingEntity entity, DamageSource src, floa
 		return MinecraftForge.EVENT_BUS.post(new LivingAttackEvent(entity, src, damage));
 	}
 
+	public static void onLivingSetAttackTarget(LivingEntity entity, LivingEntity target) {
+		MinecraftForge.EVENT_BUS.post(new LivingSetAttackTargetEvent(entity, target));
+	}
+
 	public static float onLivingHurt(LivingEntity entity, DamageSource src, float damage) {
 		LivingHurtEvent event = new LivingHurtEvent(entity, src, damage);
 		return MinecraftForge.EVENT_BUS.post(event) ? 0 : event.getAmount();

patchwork-events-entity/src/main/java/com/patchworkmc/mixin/event/entity/MixinMobEntity.java

@@ -0,0 +1,39 @@
+/*
+ * Minecraft Forge, Patchwork Project
+ * Copyright (c) 2016-2020, 2019-2020
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package com.patchworkmc.mixin.event.entity;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.mob.MobEntity;
+
+import com.patchworkmc.impl.event.entity.EntityEvents;
+
+@Mixin(MobEntity.class)
+public class MixinMobEntity {
+	@Inject(method = "setTarget", at = @At("TAIL"))
+	private void hookSetTarget(LivingEntity target, CallbackInfo callback) {
+		LivingEntity entity = (LivingEntity) (Object) this;
+		EntityEvents.onLivingSetAttackTarget(entity, target);
+	}
+}

patchwork-events-entity/src/main/java/net/minecraftforge/event/entity/living/LivingSetAttackTargetEvent.java

@@ -0,0 +1,58 @@
+/*
+ * Minecraft Forge, Patchwork Project
+ * Copyright (c) 2016-2020, 2019-2020
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.event.entity.living;
+
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.mob.MobEntity;
+
+/**
+ * LivingSetAttackTargetEvent is fired when an entity sets a target to attack.
+ *
+ * <p>This event is fired whenever a {@link MobEntity} sets a target to attack in
+ * {@link MobEntity#setTarget(LivingEntity)}.</p>
+ *
+ * <p>This event is fired via {@link com.patchworkmc.impl.event.entity.EntityEvents#onLivingSetAttackTarget(LivingEntity, LivingEntity)}.</p>
+ *
+ * <p>{@link #target} contains the newly targeted Entity.</p>
+ *
+ * <p>This event is not cancellable.</p>
+ *
+ * <p>This event does not have a result.</p>
+ *
+ * <p>This event is fired on the {@link net.minecraftforge.common.MinecraftForge#EVENT_BUS}.</p>
+ */
+public class LivingSetAttackTargetEvent extends LivingEvent {
+	private final LivingEntity target;
+
+	// for EventBus
+	public LivingSetAttackTargetEvent() {
+		super();
+		this.target = null;
+	}
+
+	public LivingSetAttackTargetEvent(LivingEntity entity, LivingEntity target) {
+		super(entity);
+		this.target = target;
+	}
+
+	public LivingEntity getTarget() {
+		return target;
+	}
+}

patchwork-events-entity/src/main/resources/patchwork-events-entity.mixins.json

@@ -5,6 +5,7 @@
   "mixins": [
     "MixinEntityType",
     "MixinLivingEntity",
+    "MixinMobEntity",
     "MixinMobSpawnerLogic",
     "MixinPlayerEntity",
     "MixinPlayerManager",