equivalent-exchange-3/src/main/java/com/pahimar/ee3/command/CommandPlayerForgetCurrentItem.java

package com.pahimar.ee3.command;

import com.pahimar.ee3.api.knowledge.PlayerKnowledgeRegistryProxy;
import com.pahimar.ee3.reference.Messages;
import com.pahimar.ee3.reference.Names;
import cpw.mods.fml.common.FMLCommonHandler;
import net.minecraft.command.CommandBase;
import net.minecraft.command.ICommandSender;
import net.minecraft.command.WrongUsageException;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;

import java.util.List;

public class CommandPlayerForgetCurrentItem extends CommandBase
{
    @Override
    public String getCommandName()
    {
        return Names.Commands.PLAYER_FORGET_CURRENT_ITEM;
    }

    @Override
    public int getRequiredPermissionLevel()
    {
        return 2;
    }

    @Override
    public String getCommandUsage(ICommandSender commandSender)
    {
        return Messages.Commands.PLAYER_FORGET_CURRENT_ITEM_USAGE;
    }

    @Override
    public void processCommand(ICommandSender commandSender, String[] args)
    {
        if (args.length < 2)
        {
            throw new WrongUsageException(Messages.Commands.PLAYER_FORGET_CURRENT_ITEM_USAGE);
        }
        else
        {
            EntityPlayer entityPlayer = getPlayer(commandSender, args[1]);

            if (entityPlayer != null)
            {
                ItemStack itemStack = ((EntityPlayer) commandSender).getCurrentEquippedItem();
                if (itemStack != null)
                {
                    PlayerKnowledgeRegistryProxy.makePlayerForget(entityPlayer, itemStack);
                    func_152373_a(commandSender, this, Messages.Commands.PLAYER_FORGET_CURRENT_ITEM_SUCCESS, new Object[]{commandSender.getCommandSenderName(), entityPlayer.getCommandSenderName(), itemStack.func_151000_E()});
                }
                else
                {
                    throw new WrongUsageException(Messages.Commands.NO_ITEM);
                }

            }
            else
            {
                throw new WrongUsageException(Messages.Commands.PLAYER_NOT_FOUND_ERROR);
            }
        }
    }

    @Override
    public List addTabCompletionOptions(ICommandSender commandSender, String[] args)
    {
        if (args.length == 2)
        {
            return getListOfStringsMatchingLastWord(args, FMLCommonHandler.instance().getMinecraftServerInstance().getAllUsernames());
        }

        return null;
    }
}