From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tom <cryptite@gmail.com>
Date: Fri, 26 Feb 2021 16:24:25 -0600
Subject: [PATCH] Expose Tracked Players


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 87c719caf796f54296ff7e412548062e02af270e..ec30f886585d407fbd122e05107ebca44895c585 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -170,7 +170,7 @@ public abstract class Entity implements Nameable, CommandSource, net.minecraft.s
     public com.destroystokyo.paper.loottable.PaperLootableInventoryData lootableData; // Paper
     private CraftEntity bukkitEntity;
 
-    ChunkMap.TrackedEntity tracker; // Paper
+    public ChunkMap.TrackedEntity tracker; // Paper package private -> public
     public boolean collisionLoadChunks = false; // Paper
     public Throwable addedToWorldStack; // Paper - entity debug
     public CraftEntity getBukkitEntity() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index d2d179cdef8129653983b01d94928ba83f64f644..ec8c7499662c0a810f1337ebc0fa24d2f3ca79e7 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -16,6 +16,7 @@ import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections; // Paper
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
@@ -2305,6 +2306,21 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     }
     // Paper end
 
+    // Paper start
+    @Override
+    public Set<Player> getTrackedPlayers() {
+        if (entity.tracker == null) {
+            return Collections.emptySet();
+        }
+
+        Set<Player> set = new HashSet<>(entity.tracker.seenBy.size());
+        for (ServerPlayer entityPlayer : entity.tracker.seenBy) {
+            set.add(entityPlayer.getBukkitEntity().getPlayer());
+        }
+        return set;
+    }
+    // Paper end
+
     // Spigot start
     private final Player.Spigot spigot = new Player.Spigot()
     {