From 1ec9c98ab715ee1884239da6c0e3b4957235ed46 Mon Sep 17 00:00:00 2001
From: Mystiflow <mystiflow@gmail.com>
Date: Sun, 14 Feb 2016 15:54:40 +0000
Subject: [PATCH] Allow the console to tab complete commands


diff --git a/proxy/src/main/java/net/md_5/bungee/BungeeCord.java b/proxy/src/main/java/net/md_5/bungee/BungeeCord.java
index 9d7a25ab..8a4b2283 100644
--- a/proxy/src/main/java/net/md_5/bungee/BungeeCord.java
+++ b/proxy/src/main/java/net/md_5/bungee/BungeeCord.java
@@ -210,6 +210,7 @@ public class BungeeCord extends ProxyServer
         AnsiConsole.systemInstall();
         consoleReader = new ConsoleReader();
         consoleReader.setExpandEvents( false );
+        consoleReader.addCompleter( new ConsoleCommandCompleter( this ) );
 
         logger = new BungeeLogger( "BungeeCord", System.getProperty("bungee.log-file", "proxy.log"), consoleReader );
         System.setErr( new PrintStream( new LoggingOutputStream( logger, Level.SEVERE ), true ) );
diff --git a/proxy/src/main/java/net/md_5/bungee/ConsoleCommandCompleter.java b/proxy/src/main/java/net/md_5/bungee/ConsoleCommandCompleter.java
new file mode 100644
index 00000000..455b0787
--- /dev/null
+++ b/proxy/src/main/java/net/md_5/bungee/ConsoleCommandCompleter.java
@@ -0,0 +1,72 @@
+package net.md_5.bungee;
+
+import com.google.common.collect.Iterables;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import jline.console.completer.Completer;
+import net.md_5.bungee.api.ProxyServer;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.logging.Level;
+
+public class ConsoleCommandCompleter implements Completer
+{
+
+    private final ExecutorService executor = Executors.newSingleThreadExecutor(
+            new ThreadFactoryBuilder().setNameFormat( "Console Command Completer Thread - %1$d" ).build() );
+
+    private final ProxyServer proxy;
+
+    public ConsoleCommandCompleter( ProxyServer proxy )
+    {
+        this.proxy = proxy;
+    }
+
+    @Override
+    public int complete( String buffer, int cursor, List<CharSequence> candidates )
+    {
+        Future<Iterable<String>> future = executor.submit( new Callable<Iterable<String>>()
+        {
+            @Override
+            public Iterable<String> call() throws Exception
+            {
+                List<String> results = new ArrayList<>();
+                proxy.getPluginManager().dispatchCommand( proxy.getConsole(), buffer, results );
+                return results;
+            }
+        } );
+
+        try
+        {
+            Iterable<String> offers = future.get();
+            if ( offers == null )
+            {
+                return cursor;
+            }
+
+            Iterables.addAll( candidates, offers );
+
+            final int lastSpace = buffer.lastIndexOf( ' ' );
+            if ( lastSpace == -1 )
+            {
+                return cursor - buffer.length();
+            } else
+            {
+                return cursor - ( buffer.length() - lastSpace - 1 );
+            }
+        } catch ( ExecutionException ex )
+        {
+            proxy.getLogger().log( Level.WARNING, "Unhandled exception when tab completing", ex );
+        } catch ( InterruptedException ex )
+        {
+            Thread.currentThread().interrupt();
+        }
+
+        return cursor;
+    }
+}
-- 
2.12.0