BloodMagic/BM_src/WayofTime/alchemicalWizardry/common/tileEntity/container/ContainerAltar.java

package WayofTime.alchemicalWizardry.common.tileEntity.container;

import WayofTime.alchemicalWizardry.common.tileEntity.TEAltar;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

public class ContainerAltar extends Container {
    protected TEAltar tileEntity;

    public ContainerAltar(InventoryPlayer inventoryPlayer, TEAltar te)
    {
        tileEntity = te;

        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                addSlotToContainer(new Slot(tileEntity, j + i * 3, 62 + j * 18, 17 + i * 18));
            }
        }

        bindPlayerInventory(inventoryPlayer);
    }

    @Override
    public boolean canInteractWith(EntityPlayer entityplayer)
    {
        return tileEntity.isUseableByPlayer(entityplayer);
    }

    protected void bindPlayerInventory(InventoryPlayer inventoryPlayer)
    {
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 9; j++)
            {
                addSlotToContainer(new Slot(inventoryPlayer, j + i * 9 + 9,
                        8 + j * 18, 84 + i * 18));
            }
        }

        for (int i = 0; i < 9; i++)
        {
            addSlotToContainer(new Slot(inventoryPlayer, i, 8 + i * 18, 142));
        }
    }

    @Override
    public ItemStack transferStackInSlot(EntityPlayer player, int slot)
    {
        ItemStack stack = null;
        Slot slotObject = (Slot) inventorySlots.get(slot);

        //null checks and checks if the item can be stacked (maxStackSize > 1)
        if (slotObject != null && slotObject.getHasStack())
        {
            ItemStack stackInSlot = slotObject.getStack();
            stack = stackInSlot.copy();

            //merges the item into player inventory since its in the tileEntity
            if (slot < 9)
            {
                if (!this.mergeItemStack(stackInSlot, 0, 35, true))
                {
                    return null;
                }
            }
            //places it into the tileEntity is possible since its in the player inventory
            else if (!this.mergeItemStack(stackInSlot, 0, 9, false))
            {
                return null;
            }

            if (stackInSlot.stackSize == 0)
            {
                slotObject.putStack(null);
            } else
            {
                slotObject.onSlotChanged();
            }

            if (stackInSlot.stackSize == stack.stackSize)
            {
                return null;
            }

            slotObject.onPickupFromSlot(player, stackInSlot);
        }

        return stack;
    }
}