Paper/CraftBukkit-Patches/0028-Implement-TagAPI-into-Spigot-much-more-efficient-and.patch

From b46a1d3cb2371706ba49c9cf6c1b8919dc6edaa8 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Tue, 19 Feb 2013 18:30:10 +1100
Subject: [PATCH] Implement TagAPI into Spigot - much more efficient and only a
 dozen lines of code.

---
 .../net/minecraft/server/EntityTrackerEntry.java   | 12 +++-
 .../java/net/minecraft/server/MinecraftServer.java |  1 +
 .../org/kitteh/tag/PlayerReceiveNameTagEvent.java  | 49 +++++++++++++++
 src/main/java/org/kitteh/tag/TagAPI.java           | 73 ++++++++++++++++++++++
 4 files changed, 132 insertions(+), 3 deletions(-)
 create mode 100644 src/main/java/org/kitteh/tag/PlayerReceiveNameTagEvent.java
 create mode 100644 src/main/java/org/kitteh/tag/TagAPI.java

diff --git a/src/main/java/net/minecraft/server/EntityTrackerEntry.java b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
index 27a548f..d95d5af 100644
--- a/src/main/java/net/minecraft/server/EntityTrackerEntry.java
+++ b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
@@ -301,7 +301,7 @@ public class EntityTrackerEntry {
                     // CraftBukkit end
 
                     this.trackedPlayers.add(entityplayer);
-                    Packet packet = this.b();
+                    Packet packet = this.b(entityplayer); // Spigot
 
                     entityplayer.playerConnection.sendPacket(packet);
                     if (!this.tracker.getDataWatcher().d()) {
@@ -370,7 +370,7 @@ public class EntityTrackerEntry {
         }
     }
 
-    private Packet b() {
+    private Packet b(EntityPlayer target) { // Spigot
         if (this.tracker.dead) {
             // CraftBukkit start - remove useless error spam, just return
             // System.out.println("Fetching addPacket for removed entity");
@@ -381,7 +381,13 @@ public class EntityTrackerEntry {
         if (this.tracker instanceof EntityItem) {
             return new Packet23VehicleSpawn(this.tracker, 2, 1);
         } else if (this.tracker instanceof EntityPlayer) {
-            return new Packet20NamedEntitySpawn((EntityHuman) this.tracker);
+            // Spigot start
+            Packet20NamedEntitySpawn packet = new Packet20NamedEntitySpawn((EntityHuman) this.tracker);
+            org.kitteh.tag.PlayerReceiveNameTagEvent event = new org.kitteh.tag.PlayerReceiveNameTagEvent(target.getBukkitEntity(), ((EntityPlayer) tracker).getBukkitEntity());
+            tracker.world.getServer().getPluginManager().callEvent(event);
+            packet.b = event.getTag();
+            return packet;
+            // Spigot end
         } else {
             if (this.tracker instanceof EntityMinecart) {
                 EntityMinecart entityminecart = (EntityMinecart) this.tracker;
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 99a6cf4..69564cd 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -512,6 +512,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
 
         this.methodProfiler.b();
         this.methodProfiler.b();
+        org.kitteh.tag.TagAPI.tick(); // Spigot
     }
 
     public void r() {
diff --git a/src/main/java/org/kitteh/tag/PlayerReceiveNameTagEvent.java b/src/main/java/org/kitteh/tag/PlayerReceiveNameTagEvent.java
new file mode 100644
index 0000000..2ea9e07
--- /dev/null
+++ b/src/main/java/org/kitteh/tag/PlayerReceiveNameTagEvent.java
@@ -0,0 +1,49 @@
+package org.kitteh.tag;
+
+import org.apache.commons.lang.Validate;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+
+public class PlayerReceiveNameTagEvent extends PlayerEvent {
+
+    private static final HandlerList handlers = new HandlerList();
+    private boolean modified;
+    private final Player named;
+    private String tag;
+
+    public PlayerReceiveNameTagEvent(Player who, Player named) {
+        super(who);
+        this.modified = false;
+        this.named = named;
+        this.tag = named.getName();
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public Player getNamedPlayer() {
+        return named;
+    }
+
+    public String getTag() {
+        return tag;
+    }
+
+    public boolean isModified() {
+        return modified;
+    }
+
+    public boolean setTag(String newTag) {
+        Validate.notNull(newTag, "New nametag cannot be null!");
+        tag = newTag;
+        modified = true;
+        return (newTag.length() < 16) ? true : false;
+    }
+}
diff --git a/src/main/java/org/kitteh/tag/TagAPI.java b/src/main/java/org/kitteh/tag/TagAPI.java
new file mode 100644
index 0000000..1e2693c
--- /dev/null
+++ b/src/main/java/org/kitteh/tag/TagAPI.java
@@ -0,0 +1,73 @@
+package org.kitteh.tag;
+
+import com.google.common.base.Preconditions;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import org.bukkit.entity.Player;
+
+public class TagAPI {
+
+    private static Set<DelayedShowTask> tasks = new HashSet<DelayedShowTask>();
+
+    private static class DelayedShowTask {
+
+        private final Map<Player, Player> pairs = new HashMap<Player, Player>();
+        private int countdown = 2;
+    }
+
+    public static void tick() {
+        for (Iterator<DelayedShowTask> iter = tasks.iterator(); iter.hasNext();) {
+            DelayedShowTask task = iter.next();
+            if (--task.countdown == 0) {
+                iter.remove();
+                for (Map.Entry<Player, Player> pair : task.pairs.entrySet()) {
+                    if (pair.getKey() != null && pair.getValue() != null) {
+                        pair.getValue().showPlayer(pair.getValue());
+                    }
+                }
+            }
+        }
+    }
+
+    public static void refreshPlayer(Player player) {
+        Preconditions.checkArgument(player != null, "player");
+        Preconditions.checkArgument(player.isOnline(), "offline");
+
+        DelayedShowTask task = new DelayedShowTask();
+        for (Player otherGuy : player.getWorld().getPlayers()) {
+            if (player != otherGuy && otherGuy.canSee(player)) {
+                otherGuy.hidePlayer(player);
+                task.pairs.put(otherGuy, player);
+            }
+        }
+
+        tasks.add(task);
+    }
+
+    public static void refreshPlayer(Player player, Player forWhom) {
+        Preconditions.checkArgument(player != null, "player");
+        Preconditions.checkArgument(forWhom != null, "forWhom");
+        Preconditions.checkArgument(player != forWhom, "self");
+        DelayedShowTask task = new DelayedShowTask();
+
+        if (forWhom.canSee(player) && player.getWorld() == forWhom.getWorld()) {
+            forWhom.hidePlayer(player);
+            task.pairs.put(forWhom, player);
+        }
+
+        tasks.add(task);
+    }
+
+    public static void refreshPlayer(Player player, Set<Player> forWhom) {
+        Preconditions.checkArgument(player != null, "player");
+        Preconditions.checkArgument(forWhom != null, "forWhom");
+        for (Player whom : forWhom) {
+            if (player != whom) {
+                refreshPlayer(player, whom);
+            }
+        }
+    }
+}
-- 
1.8.1-rc2