Paper/CraftBukkit-Patches/0075-Add-VanillaCommand-Wrapper-to-Support-New-Commands.patch

From 6f8c9264a359086a030be0348390caed19323c18 Mon Sep 17 00:00:00 2001
From: Thinkofdeath <thethinkofdeath@gmail.com>
Date: Wed, 18 Dec 2013 10:32:15 +1100
Subject: [PATCH] Add VanillaCommand Wrapper to Support New Commands

This implements testfor, setblock and summon, as well as the capacity to replace any command with its vanilla version.

diff --git a/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java b/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
index 5271272..f8d2ecb 100644
--- a/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
+++ b/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
@@ -96,7 +96,7 @@ public abstract class CommandBlockListenerAbstract implements ICommandListener {
 
             // Make sure this is a valid command
             if (commandMap.getCommand(args[0]) == null) {
-                this.b = 0;
+                this.b = org.spigotmc.VanillaCommandWrapper.dispatch( sender, command ); // Spigot - Try vanilla commands
                 return;
             }
 
diff --git a/src/main/java/net/minecraft/server/CommandDispatcher.java b/src/main/java/net/minecraft/server/CommandDispatcher.java
index e63f17c..e58be15 100644
--- a/src/main/java/net/minecraft/server/CommandDispatcher.java
+++ b/src/main/java/net/minecraft/server/CommandDispatcher.java
@@ -62,7 +62,7 @@ public class CommandDispatcher extends CommandHandler implements ICommandDispatc
     public void a(ICommandListener icommandlistener, int i, String s, Object... aobject) {
         boolean flag = true;
 
-        if (icommandlistener instanceof CommandBlockListenerAbstract && !MinecraftServer.getServer().worldServer[0].getGameRules().getBoolean("commandBlockOutput")) {
+        if (icommandlistener instanceof CommandBlockListenerAbstract && !MinecraftServer.getServer().worlds.get(0).getGameRules().getBoolean("commandBlockOutput")) { // Spigot - worldServer -> worlds
             flag = false;
         }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index cfa90d3..f369944 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -546,6 +546,12 @@ public final class CraftServer implements Server {
         if (commandMap.dispatch(sender, commandLine)) {
             return true;
         }
+        // Spigot Start - Try vanilla commands
+        if ( org.spigotmc.VanillaCommandWrapper.dispatch( sender, commandLine ) != -1 )
+        {
+            return true;
+        }
+        // Spigot End
 
         sender.sendMessage(org.spigotmc.SpigotConfig.unknownCommandMessage);
 
@@ -1399,15 +1405,23 @@ public final class CraftServer implements Server {
         }
         // Spigot End
 
-        List<String> completions = null;
+        // Spigot Start
+        List<String> completions = new ArrayList<String>();
         try {
-            completions = getCommandMap().tabComplete(player, message.substring(1));
+            message = message.substring( 1 );
+            List<String> bukkitCompletions = getCommandMap().tabComplete( player, message );
+            if ( bukkitCompletions != null )
+            {
+                completions.addAll( bukkitCompletions );
+            }
+            completions.addAll( org.spigotmc.VanillaCommandWrapper.complete( player, message ) );
+            // Spigot End
         } catch (CommandException ex) {
             player.sendMessage(ChatColor.RED + "An internal error occurred while attempting to tab-complete this command");
             getLogger().log(Level.SEVERE, "Exception when " + player.getName() + " attempted to tab complete " + message, ex);
         }
 
-        return completions == null ? ImmutableList.<String>of() : completions;
+        return completions; // Spigot
     }
 
     public List<String> tabCompleteChat(Player player, String message) {
diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
index c4a5488..628533e 100644
--- a/src/main/java/org/spigotmc/SpigotConfig.java
+++ b/src/main/java/org/spigotmc/SpigotConfig.java
@@ -6,6 +6,7 @@ import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -14,6 +15,7 @@ import net.minecraft.server.MinecraftServer;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.command.Command;
+import org.bukkit.command.SimpleCommandMap;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.craftbukkit.command.TicksPerSecondCommand;
 
@@ -204,4 +206,13 @@ public class SpigotConfig
         System.setProperty( "io.netty.eventLoopThreads", Integer.toString( count ) );
         Bukkit.getLogger().log( Level.INFO, "Using {0} threads for Netty based IO", count );
     }
+
+    private static void replaceCommands()
+    {
+        for ( String command : (List<String>) getList( "replace-commands", Arrays.asList( "setblock", "summon", "testforblock" ) ) )
+        {
+            SimpleCommandMap.removeFallback( command );
+            VanillaCommandWrapper.allowedCommands.add( command );
+        }
+    }
 }
diff --git a/src/main/java/org/spigotmc/VanillaCommandWrapper.java b/src/main/java/org/spigotmc/VanillaCommandWrapper.java
new file mode 100644
index 0000000..e778d47
--- /dev/null
+++ b/src/main/java/org/spigotmc/VanillaCommandWrapper.java
@@ -0,0 +1,146 @@
+package org.spigotmc;
+
+import com.google.common.collect.ImmutableList;
+import net.minecraft.server.ChunkCoordinates;
+import net.minecraft.server.EntityMinecartCommandBlock;
+import net.minecraft.server.IChatBaseComponent;
+import net.minecraft.server.ICommandListener;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.TileEntityCommand;
+import net.minecraft.server.World;
+import org.bukkit.ChatColor;
+import org.bukkit.block.Block;
+import org.bukkit.command.CommandSender;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.command.CraftBlockCommandSender;
+import org.bukkit.craftbukkit.entity.CraftMinecartCommand;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+
+public class VanillaCommandWrapper
+{
+
+    public static final HashSet<String> allowedCommands = new HashSet<String>();
+
+    public static int dispatch(CommandSender sender, String commandLine)
+    {
+        int pos = commandLine.indexOf( ' ' );
+        if ( pos == -1 )
+        {
+            pos = commandLine.length();
+        }
+        String name = commandLine.substring( 0, pos );
+        if ( !allowedCommands.contains( name ) )
+        {
+            return -1;
+        }
+        if ( !sender.hasPermission( "bukkit.command." + name ) )
+        {
+            sender.sendMessage( ChatColor.RED + "You do not have permission for this command" );
+            return 0;
+        }
+        ICommandListener listener = getListener( sender );
+        if ( listener == null )
+        {
+            return -1;
+        }
+        return MinecraftServer.getServer().getCommandHandler().a( listener, commandLine );
+    }
+
+    public static List<String> complete(CommandSender sender, String commandLine)
+    {
+        int pos = commandLine.indexOf( ' ' );
+        if ( pos == -1 )
+        {
+            List<String> completions = new ArrayList<String>();
+            commandLine = commandLine.toLowerCase();
+            for ( String command : allowedCommands )
+            {
+                if ( command.startsWith( commandLine ) && sender.hasPermission( "bukkit.command." + command ) )
+                {
+                    completions.add( "/" + command );
+                }
+            }
+            return completions;
+        }
+        String name = commandLine.substring( 0, pos );
+        if ( !allowedCommands.contains( name ) || !sender.hasPermission( "bukkit.command." + name ) )
+        {
+            return ImmutableList.<String>of();
+        }
+        ICommandListener listener = getListener( sender );
+        if ( listener == null )
+        {
+            return ImmutableList.<String>of();
+        }
+        return MinecraftServer.getServer().getCommandHandler().b( listener, commandLine );
+    }
+
+    private static ICommandListener getListener(CommandSender sender)
+    {
+        if ( sender instanceof CraftPlayer )
+        {
+            return new PlayerListener( ( (CraftPlayer) sender ).getHandle() );
+        }
+        if ( sender instanceof CraftBlockCommandSender )
+        {
+            CraftBlockCommandSender commandBlock = (CraftBlockCommandSender) sender;
+            Block block = commandBlock.getBlock();
+            return ( (TileEntityCommand) ( (CraftWorld) block.getWorld() ).getTileEntityAt( block.getX(), block.getY(), block.getZ() ) ).a();
+        }
+        if ( sender instanceof CraftMinecartCommand )
+        {
+            return ( (EntityMinecartCommandBlock) ( (CraftMinecartCommand) sender ).getHandle() ).e();
+        }
+        return null;
+    }
+
+    private static class PlayerListener implements ICommandListener
+    {
+
+        private final ICommandListener handle;
+
+        public PlayerListener(ICommandListener handle)
+        {
+            this.handle = handle;
+        }
+
+        @Override
+        public String getName()
+        {
+            return handle.getName();
+        }
+
+        @Override
+        public IChatBaseComponent getScoreboardDisplayName()
+        {
+            return handle.getScoreboardDisplayName();
+        }
+
+        @Override
+        public void sendMessage(IChatBaseComponent iChatBaseComponent)
+        {
+            handle.sendMessage( iChatBaseComponent );
+        }
+
+        @Override
+        public boolean a(int i, String s)
+        {
+            return true;
+        }
+
+        @Override
+        public ChunkCoordinates getChunkCoordinates()
+        {
+            return handle.getChunkCoordinates();
+        }
+
+        @Override
+        public World getWorld()
+        {
+            return handle.getWorld();
+        }
+    }
+}
-- 
1.8.3.2