minecraft-kajetans-mod/src/main/java/me/km/commands/CommandSummon.java

package me.km.commands;

import me.km.api.Utils;
import me.km.api.GlobalText;
import me.km.api.Module;
import me.km.api.ModuleCommand;
import me.km.permissions.Permissions;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityList;
import net.minecraft.entity.EntityLiving;
import net.minecraft.entity.effect.EntityLightningBolt;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.nbt.JsonToNBT;
import net.minecraft.nbt.NBTException;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.world.World;
import net.minecraft.world.chunk.storage.AnvilChunkLoader;

public class CommandSummon extends ModuleCommand
{
    public CommandSummon(Module m) 
    {
        super("summon", m);
        super.setDescription("Spawnt ein Mob / Mobs");
        super.setUsage("/summon <type> [amount] [data]");
        super.setPermission(Permissions.SUMMON);
    }

    @Override
    public boolean execute(ICommandSender cs, String[] arg) 
    {
        if(!(cs instanceof EntityPlayer))
        {
            this.getModule().send(cs, GlobalText.onlyPlayer());
            return true;
        }
        if(arg.length < 1)
        {
            return false;
        }
        EntityPlayer p = (EntityPlayer) cs;
        int counter = 1;
        if(arg.length >= 2)
        {
            try
            {
                counter = Integer.parseInt(arg[1]);
            }
            catch(NumberFormatException ex)
            {
            }
        }
        BlockPos target = Utils.getPlayerTarget(p).add(0, 1, 0);

        String s = arg[0];
        double d0 = target.getX();
        double d1 = target.getY();
        double d2 = target.getZ();

        World world = p.getEntityWorld();

        try
        {
            if (!world.isBlockLoaded(target))
            {
                this.getModule().send(cs, "Der Spawnpunkt ist außerhalb der Welt.");
                return true;
            }
            else if (EntityList.LIGHTNING_BOLT.equals(new ResourceLocation(s)))
            {
                world.addWeatherEffect(new EntityLightningBolt(world, d0, d1, d2, false));
            }
            else
            {
                NBTTagCompound nbttagcompound = new NBTTagCompound();
                boolean flag = false;

                if (arg.length >= 3)
                {
                    ITextComponent itextcomponent = getChatComponentFromNthArg(cs, arg, 2);
                    try
                    {
                        nbttagcompound = JsonToNBT.getTagFromJson(itextcomponent.getUnformattedText());
                        flag = true;
                    }
                    catch (NBTException nbtexception)
                    {
                        this.getModule().send(cs, "Der Tag ist ungültig.");
                        return true;
                    }
                }

                nbttagcompound.setString("id", s);
                for(int i = 0; i < counter; i++)
                {
                    Entity entity = AnvilChunkLoader.readWorldEntityPos(nbttagcompound, world, d0, d1, d2, true);

                    if (entity == null)
                    {
                        this.getModule().send(cs, "Die Entity lässt sich nicht spawnen.");
                        return true;
                    }
                    else
                    {
                        entity.setLocationAndAngles(d0, d1, d2, entity.rotationYaw, entity.rotationPitch);

                        if (!flag && entity instanceof EntityLiving)
                        {
                            ((EntityLiving) entity).onInitialSpawn(world.getDifficultyForLocation(new BlockPos(entity)), null);
                        }
                    }
                }
            }
        }
        catch(CommandException ex)
        {
            this.getModule().send(cs, "Die Parameter konnten nicht gelesen werden.");
        }
        return true;
    }
}