minecraft-kajetans-mod/src/main/java/me/km/module/ModuleCommand.java

package me.km.module;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nullable;
import me.km.KajetansMod;
import net.minecraft.command.CommandBase;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.math.BlockPos;

public abstract class ModuleCommand extends CommandBase
{   
    private final Module m;
    private final String name;
    private String usage;
    private String description;
    private String perm;
    private List<String> aliases;
    
    public ModuleCommand(String name, Module m) 
    {
        this.name = name;
        this.m = m;
        this.usage = "";
        this.perm = null;
        this.aliases = Collections.<String>emptyList();
    }

    @Override
    public List<String> getAliases() 
    {
        return aliases;
    }
    
    public void addAlias(String s)
    {
        if(aliases.isEmpty())
        {
            aliases = new ArrayList<>();
        }
        aliases.add(s);
    }

    public Module getModule()
    {
        return m;
    }
    
    @Override
    public String getName()
    {
        return name;
    }
    
    public void setUsage(String s)
    {
        usage = s;
    }
    
    @Override
    public String getUsage(ICommandSender sender)
    {
        return usage;
    }
    
    public void setDescription(String s)
    {
        description = s;
    }
    
    public String getDescription()
    {
        return description;
    }
    
    public void setPermission(String perm)
    {
        this.perm = perm;
    }
    
    public String getPermission()
    {
        return perm;
    }
    
    public abstract boolean execute(ICommandSender cs, String[] arg);
    
    @Override
    public void execute(MinecraftServer server, ICommandSender cs, String[] args) throws CommandException
    {   
        try
        {
            if(!execute(cs, args))
            {
                m.send(cs, this.getUsage(cs));
            }
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
    }

    @Override
    public boolean checkPermission(MinecraftServer server, ICommandSender cs) 
    {
        return KajetansMod.perms.hasPermission(cs, perm);
    }
    
    @Override
    public List<String> getTabCompletions(MinecraftServer server, ICommandSender sender, String[] args, @Nullable BlockPos targetPos)
    {
        return getListOfStringsMatchingLastWord(args, server.getOnlinePlayerNames());
    }
}