ItemRecieveBuffer.java

package crazypants.enderio.machine.hypercube;

import net.minecraft.inventory.ISidedInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;

import com.enderio.core.common.util.ArrayInventory;

public class ItemRecieveBuffer extends ArrayInventory implements ISidedInventory {

  private static final int[] ALL_SLOTS = new int[] { 0, 1, 2, 3, 4, 5 };
  private boolean recieveEnabled;

  TileHyperCube hc;

  public ItemRecieveBuffer(TileHyperCube hc) {
    super(6);
    this.hc = hc;
  }

  public boolean isEmpty() {
    for (ItemStack stack : items) {
      if(stack != null) {
        return false;
      }
    }
    return true;
  }

  public ItemStack[] getItems() {
    return items;
  }

  public void setRecieveEnabled(boolean canRecieveItems) {
    recieveEnabled = canRecieveItems;
  }

  @Override
  public int[] getAccessibleSlotsFromSide(int side) {
    return ALL_SLOTS;
  }

  @Override
  public boolean canInsertItem(int slot, ItemStack itemStack, int side) {
    if(!recieveEnabled || side < 0 || side >= items.length || slot != side || itemStack == null) {
      return false;
    }
    ItemStack item = items[slot];
    if(item == null) {
      return true;
    }
    return false;
  }

  @Override
  public void setInventorySlotContents(int slot, ItemStack stack) {
    super.setInventorySlotContents(slot, stack);
    hc.pushRecieveBuffer();
  }

  @Override
  public boolean canExtractItem(int slot, ItemStack itemStack, int side) {
    return true;
  }

  public void readFromNBT(NBTTagCompound nbtRoot) {
    items = new ItemStack[6];
    for (int i = 0; i < items.length; i++) {
      String key = "recieveBuffer" + i;
      if(nbtRoot.hasKey(key)) {
        NBTTagCompound stackRoot = nbtRoot.getCompoundTag(key);
        items[i] = ItemStack.loadItemStackFromNBT(stackRoot);
      } else {
        items[i] = null;
      }
    }
  }

  public void writeToNBT(NBTTagCompound nbtRoot) {
    for (int i = 0; i < items.length; i++) {
      ItemStack stack = items[i];
      if(stack != null) {
        NBTTagCompound stackRoot = new NBTTagCompound();
        stack.writeToNBT(stackRoot);
        nbtRoot.setTag("recieveBuffer" + i, stackRoot);
      }
    }

  }

}