ItemTalismanWater

package com.techmage.magetech.item;

import com.techmage.magetech.reference.Names;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.world.World;

public class ItemTalismanWater extends ItemMageTech_Magic
{
    public ItemTalismanWater()
    {
        super();
        this.setUnlocalizedName(Names.Items.TALISMAN_WATER);
        this.setMaxStackSize(1);
    }

    @Override
    public ItemStack onItemRightClick(ItemStack itemStackIn, World worldIn, EntityPlayer playerIn)
    {
        // Only active on the server
        if (!worldIn.isRemote)
        {
            // Check if the item has a tagCompound
            if (itemStackIn.hasTagCompound())
            {
                // Set the items tagCompound's key "activated" to true
                itemStackIn.getTagCompound().setBoolean("activated", true);
            }

            // Create a new tagCompound for the item and set it's key "activated" to true
            else
            {
                itemStackIn.setTagCompound(new NBTTagCompound());
                itemStackIn.getTagCompound().setBoolean("activated", true);
            }
        }

        return itemStackIn;
    }

    @Override
    public void onUpdate(ItemStack itemStackIn, World worldIn, Entity entityIn, int itemSlot, boolean isSelected)
    {
        // Only active on the server
        if (!worldIn.isRemote)
        {
            // Check if the entity holding the item a a player
            if (entityIn instanceof EntityPlayer)
            {
                // Check if the item has a tagCompound
                if (itemStackIn.hasTagCompound())
                {
                    // Check if the "passive" key is true
                    if (itemStackIn.getTagCompound().getBoolean("activated"))
                    {
                        // Check if the player is in water
                        if (entityIn.isInWater())
                        {
                            // Set the items tagCompound's key "buffed" to true
                            itemStackIn.getTagCompound().setBoolean("buffed", true);

                            // Set the items tagCompound's key "activated" to false
                            itemStackIn.getTagCompound().setBoolean("activated", false);

                            EntityPlayer player = ((EntityPlayer) entityIn);

                            // Add Effects to the player
                            player.addPotionEffect(new PotionEffect(Potion.waterBreathing.id, Integer.MAX_VALUE, 0));
                            player.addPotionEffect(new PotionEffect(Potion.damageBoost.id, Integer.MAX_VALUE, 0));
                            player.addPotionEffect(new PotionEffect(Potion.nightVision.id, Integer.MAX_VALUE, 0));
                        }
                    }

                    // Check if the "buffed" key is true
                    if (itemStackIn.getTagCompound().getBoolean("buffed"))
                    {
                        if (!entityIn.isInWater())
                        {
                            EntityPlayer player = ((EntityPlayer) entityIn);

                            // Remove Effects from the player
                            player.removePotionEffect(Potion.waterBreathing.getId());
                            player.removePotionEffect(Potion.damageBoost.getId());
                            player.removePotionEffect(Potion.nightVision.getId());

                            // Set the "buffed" key to false
                            itemStackIn.getTagCompound().setBoolean("buffed", false);
                        }
                    }
                }
            }
        }
    }

    @Override
    public boolean hasEffect(ItemStack itemStackIn)
    {
        // Check if the item has a tagCompound
        if (itemStackIn.hasTagCompound())
        {
            // Check if there is a "activated" or a "buffed" key
            if (itemStackIn.getTagCompound().hasKey("activated") || itemStackIn.getTagCompound().hasKey("buffed"))
            {
                // Return true whether "activated" or "buffed" is true
                return itemStackIn.getTagCompound().getBoolean("activated") || itemStackIn.getTagCompound().getBoolean("buffed");
            }
        }

        return false;
    }
}