From 7b52b8c28a68b2738ba4ca457a00f75d40959539 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Thu, 14 Mar 2019 07:44:06 +0000
Subject: [PATCH] Add ProxyDefineCommandsEvent

provides an event to allow plugins to intercept tab completions
sent to the client

diff --git a/api/src/main/java/io/github/waterfallmc/waterfall/event/ProxyDefineCommandsEvent.java b/api/src/main/java/io/github/waterfallmc/waterfall/event/ProxyDefineCommandsEvent.java
new file mode 100644
index 00000000..1fd4fc90
--- /dev/null
+++ b/api/src/main/java/io/github/waterfallmc/waterfall/event/ProxyDefineCommandsEvent.java
@@ -0,0 +1,41 @@
+package io.github.waterfallmc.waterfall.event;
+
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.connection.Connection;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.TargetedEvent;
+import net.md_5.bungee.api.plugin.Command;
+import net.md_5.bungee.api.plugin.Event;
+
+import java.util.Map;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+
+/**
+ * Called when the proxy intercepts the command packet
+ * allowing for plugins to prevent commands being added
+ * to the clients which might not be wanted.
+ *
+ *
+ * <i>Plugin developers, please implement {@link Command#hasPermission(CommandSender)}
+ * properly in favor of this event.</i>
+ */
+@Data
+@ToString(callSuper = true)
+@EqualsAndHashCode(callSuper = true)
+public class ProxyDefineCommandsEvent extends TargetedEvent {
+
+
+    /**
+     * The map of commands to be sent to the player
+     */
+    private final Map<String, Command> commands;
+
+    public ProxyDefineCommandsEvent(Connection sender, Connection receiver, Map<String, Command> commands) {
+        super(sender, receiver);
+        this.commands = commands;
+    }
+
+}
diff --git a/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java b/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java
index 09bbe594..acedbefe 100644
--- a/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java
+++ b/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java
@@ -12,7 +12,8 @@ import com.mojang.brigadier.context.StringRange;
 import com.mojang.brigadier.suggestion.Suggestion;
 import com.mojang.brigadier.suggestion.Suggestions;
 import com.mojang.brigadier.tree.LiteralCommandNode;
-import java.util.Objects; // Waterfall
+
+import io.github.waterfallmc.waterfall.event.ProxyDefineCommandsEvent; // Waterfall
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufAllocator;
 import io.netty.buffer.Unpooled;
@@ -20,8 +21,10 @@ import io.netty.channel.unix.DomainSocketAddress;
 import java.io.DataInput;
 import java.net.InetSocketAddress;
 import java.util.ArrayList;
+import java.util.HashMap; // Waterfall
 import java.util.List;
 import java.util.Map;
+import java.util.Objects; // Waterfall
 import lombok.RequiredArgsConstructor;
 import net.md_5.bungee.ServerConnection;
 import net.md_5.bungee.ServerConnection.KeepAliveData;
@@ -656,9 +659,25 @@ public class DownstreamBridge extends PacketHandler
     {
         boolean modified = false;
 
-        for ( Map.Entry<String, Command> command : bungee.getPluginManager().getCommands() )
+        // Waterfall start
+        Map<String, Command> commandMap = new HashMap<>();
+        for ( Map.Entry<String, Command> commandEntry : bungee.getPluginManager().getCommands() ) {
+            if ( !bungee.getDisabledCommands().contains( commandEntry.getKey() )
+                    && commands.getRoot().getChild( commandEntry.getKey() ) == null
+                    && commandEntry.getValue().hasPermission( this.con ) ) {
+
+                commandMap.put( commandEntry.getKey(), commandEntry.getValue() );
+            }
+        }
+
+        ProxyDefineCommandsEvent event = new ProxyDefineCommandsEvent( this.server, this.con, commandMap );
+        bungee.getPluginManager().callEvent( event );
+
+        for ( Map.Entry<String, Command> command : event.getCommands().entrySet() )
         {
-            if ( !bungee.getDisabledCommands().contains( command.getKey() ) && commands.getRoot().getChild( command.getKey() ) == null && command.getValue().hasPermission( con ) )
+            //noinspection ConstantConditions
+            if ( true ) // Moved up
+            // Waterfall end
             {
                 LiteralCommandNode dummy = LiteralArgumentBuilder.literal( command.getKey() )
                         .then( RequiredArgumentBuilder.argument( "args", StringArgumentType.greedyString() )
-- 
2.27.0