AsyncSendPlayerSuggestionsEvent Brigadier Event

Going to be used for ACF to be able to send Tooltips to client :)

This is after completions are calculated, to control what is sent to the client.

Paper-MojangAPI/src/main/java/com/destroystokyo/paper/event/brigadier/AsyncSendPlayerSuggestionsEvent.java

@@ -0,0 +1,77 @@
+package com.destroystokyo.paper.event.brigadier;
+
+import com.mojang.brigadier.suggestion.Suggestions;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Called when sending Suggestions to the client. Will be called asynchronously if a plugin
+ * marks the AsyncTabComplete event handled asynchronously, otherwise called synchronously.
+ */
+public class AsyncSendPlayerSuggestionsEvent extends PlayerEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+    private boolean cancelled = false;
+
+    private Suggestions suggestions;
+    private final String buffer;
+
+    public AsyncSendPlayerSuggestionsEvent(Player player, Suggestions suggestions, String buffer) {
+        super(player, !Bukkit.isPrimaryThread());
+        this.suggestions = suggestions;
+        this.buffer = buffer;
+    }
+
+    /**
+     * @return The input buffer sent to request these suggestions
+     */
+    public String getBuffer() {
+        return buffer;
+    }
+
+    /**
+     * @return The suggestions being sent to client
+     */
+    public Suggestions getSuggestions() {
+        return suggestions;
+    }
+
+    /**
+     * @param suggestions The suggestions to be sent to client if need to change them
+     */
+    public void setSuggestions(Suggestions suggestions) {
+        this.suggestions = suggestions;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    /**
+     * Cancels sending suggestions to the client
+     * {@inheritDoc}
+     */
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @NotNull
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}

Spigot-Server-Patches/0494-Implement-Brigadier-Mojang-API.patch

@@ -1,4 +1,4 @@
-From c6d1d92f36b8a4031a470e690908abe589ca58d8 Mon Sep 17 00:00:00 2001
+From 93ca45257861ecd220c28c8e9b14638d6e3206dc Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sun, 19 Apr 2020 18:15:29 -0400
 Subject: [PATCH] Implement Brigadier Mojang API
@@ -68,6 +68,38 @@ index 0b23a0548d..c988c929f1 100644
      @Override
      public boolean hasPermission(int i) {
          // CraftBukkit start
+diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
+index 38ec22f4c0..376f7f8f0b 100644
+--- a/src/main/java/net/minecraft/server/PlayerConnection.java
++++ b/src/main/java/net/minecraft/server/PlayerConnection.java
+@@ -576,8 +576,12 @@ public class PlayerConnection implements PacketListenerPlayIn {
+             ParseResults<CommandListenerWrapper> parseresults = this.minecraftServer.getCommandDispatcher().a().parse(stringreader, this.player.getCommandListener());
+ 
+         this.minecraftServer.getCommandDispatcher().a().getCompletionSuggestions(parseresults).thenAccept((suggestions) -> {
+-            if (((Suggestions) suggestions).isEmpty()) return; // CraftBukkit - don't send through empty suggestions - prevents [<args>] from showing for plugins with nothing more to offer
+-                this.networkManager.sendPacket(new PacketPlayOutTabComplete(packetplayintabcomplete.b(), (Suggestions) suggestions)); // CraftBukkit - decompile error
++                // Paper start
++                com.destroystokyo.paper.event.brigadier.AsyncSendPlayerSuggestionsEvent suggestEvent = new com.destroystokyo.paper.event.brigadier.AsyncSendPlayerSuggestionsEvent(this.getPlayer(), suggestions, buffer);
++                suggestEvent.setCancelled(suggestions.isEmpty());
++                if (!suggestEvent.callEvent()) return;
++                this.networkManager.sendPacket(new PacketPlayOutTabComplete(packetplayintabcomplete.b(), (Suggestions) suggestEvent.getSuggestions())); // CraftBukkit - decompile error // Paper
++            // Paper end
+             });
+         }); // Paper - This needs to be on main
+             }
+@@ -587,7 +591,11 @@ public class PlayerConnection implements PacketListenerPlayIn {
+ 
+             builder = builder.createOffset(builder.getInput().lastIndexOf(' ') + 1);
+             completions.forEach(builder::suggest);
+-            player.playerConnection.sendPacket(new PacketPlayOutTabComplete(packetplayintabcomplete.b(), builder.buildFuture().join()));
++            Suggestions suggestions = builder.buildFuture().join();
++            com.destroystokyo.paper.event.brigadier.AsyncSendPlayerSuggestionsEvent suggestEvent = new com.destroystokyo.paper.event.brigadier.AsyncSendPlayerSuggestionsEvent(this.getPlayer(), suggestions, buffer);
++            suggestEvent.setCancelled(suggestions.isEmpty());
++            if (!suggestEvent.callEvent()) return;
++            this.networkManager.sendPacket(new PacketPlayOutTabComplete(packetplayintabcomplete.b(), suggestEvent.getSuggestions()));
+         }
+         // Paper end - async tab completion
+ 
 diff --git a/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java b/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
 index 5f33c9e52a..e16ecdea7d 100644
 --- a/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java

Spigot-Server-Patches/0496-Validate-PickItem-Packet-and-kick-for-invalid.patch

@@ -1,14 +1,14 @@
-From 954203816cd42cff061c4a633ad346bd3dab5073 Mon Sep 17 00:00:00 2001
+From dcd786960faeeeea7fa3106571ac2e20aae1cf0a Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sat, 2 May 2020 03:09:46 -0400
 Subject: [PATCH] Validate PickItem Packet and kick for invalid
 
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index 38ec22f4c0..2d83db9b22 100644
+index 376f7f8f0b..a33289749c 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
-@@ -683,7 +683,14 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -691,7 +691,14 @@ public class PlayerConnection implements PacketListenerPlayIn {
      @Override
      public void a(PacketPlayInPickItem packetplayinpickitem) {
          PlayerConnectionUtils.ensureMainThread(packetplayinpickitem, this, this.player.getWorldServer());