From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Sat, 2 Apr 2016 05:09:16 -0400
Subject: [PATCH] Add PlayerUseUnknownEntityEvent

== AT ==
public net.minecraft.network.protocol.game.ServerboundInteractPacket$ActionType

diff --git a/src/main/java/net/minecraft/network/protocol/game/ServerboundInteractPacket.java b/src/main/java/net/minecraft/network/protocol/game/ServerboundInteractPacket.java
index a5d57cc862036012d83b090bb1b3ccf4115a88b3..21068f766b75c414d5818073b7dca083d8ff4409 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ServerboundInteractPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ServerboundInteractPacket.java
@@ -10,8 +10,8 @@ import net.minecraft.world.entity.Entity;
 import net.minecraft.world.phys.Vec3;
 
 public class ServerboundInteractPacket implements Packet<ServerGamePacketListener> {
-    private final int entityId;
-    private final ServerboundInteractPacket.Action action;
+    private final int entityId; public final int getEntityId() { return this.entityId; } // Paper - add accessor
+    private final ServerboundInteractPacket.Action action; public final ServerboundInteractPacket.ActionType getActionType() { return this.action.getType(); } // Paper - add accessor
     private final boolean usingSecondaryAction;
     static final ServerboundInteractPacket.Action ATTACK_ACTION = new ServerboundInteractPacket.Action() {
         @Override
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 8f21a18d2ba6e9fc1c8d3076ca668c885a9ba19e..26652b91b03e1c94c05f61c99afc59ac0bb0243a 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2519,8 +2519,37 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
                 });
             }
         }
+        // Paper start - fire event
+        else {
+            packet.dispatch(new net.minecraft.network.protocol.game.ServerboundInteractPacket.Handler() {
+                @Override
+                public void onInteraction(net.minecraft.world.InteractionHand hand) {
+                    ServerGamePacketListenerImpl.this.callPlayerUseUnknownEntityEvent(packet, hand);
+                }
+
+                @Override
+                public void onInteraction(net.minecraft.world.InteractionHand hand, net.minecraft.world.phys.Vec3 pos) {
+                    ServerGamePacketListenerImpl.this.callPlayerUseUnknownEntityEvent(packet, hand);
+                }
+
+                @Override
+                public void onAttack() {
+                    ServerGamePacketListenerImpl.this.callPlayerUseUnknownEntityEvent(packet, net.minecraft.world.InteractionHand.MAIN_HAND);
+                }
+            });
+        }
+
+    }
 
+    private void callPlayerUseUnknownEntityEvent(ServerboundInteractPacket packet, InteractionHand hand) {
+        this.cserver.getPluginManager().callEvent(new com.destroystokyo.paper.event.player.PlayerUseUnknownEntityEvent(
+            this.getCraftPlayer(),
+            packet.getEntityId(),
+            packet.getActionType() == ServerboundInteractPacket.ActionType.ATTACK,
+            hand == InteractionHand.MAIN_HAND ? EquipmentSlot.HAND : EquipmentSlot.OFF_HAND
+        ));
     }
+    // Paper end
 
     @Override
     public void handleClientCommand(ServerboundClientCommandPacket packet) {