@Override
public boolean isAvailable(final Slot slot) {
if (entity.isAdminMode()) return true;
final ItemStack[] inv = entity.getRawInventory();
final ItemStack stack = inv[slot.getSlotIndex()];
if (stack != null)
return InventoryHelper.doesInventoryContain(
inv,
VendingTileEntity.INVENTORY_SLOT_START,
VendingTileEntity.GENERAL_INVENTORY_SIZE - 1,
stack,
null);
return true;
}
protected ItemStack doTrade(final Slot slot, final EntityPlayer player) {
final ItemStack[] entityInventory = entity.getRawInventory();
final ItemStack[] playerInventory = player.inventory.mainInventory;
// Get the result of the potential trade. If there is nothing,
// or the player inventory cannot hold the stack then return null.
final ItemStack result = slot.getStack();
if (result == null
|| !InventoryHelper.canInventoryAccept(
playerInventory, 0, playerInventory.length - 1, result, null)) return null;
final boolean normalMode = !entity.isAdminMode();
// Can the inventory provide the result item?
if (normalMode
&& !InventoryHelper.doesInventoryContain(
entityInventory,
VendingTileEntity.INVENTORY_SLOT_START,
VendingTileEntity.GENERAL_INVENTORY_SIZE - 1,
result,
null)) return null;
// Get the input slots. We do some math on the slot index to
// figure out the right input slots.
final int index = slot.slotNumber / 3 + VendingTileEntity.CONFIG_SLOT_START;
final ItemStack input1 = entity.getStackInSlot(index);
final ItemStack input2 = entity.getStackInSlot(index + 6);
// See if the vending inventory can accept the required items
if (normalMode
&& !InventoryHelper.canInventoryAccept(
entityInventory,
VendingTileEntity.INVENTORY_SLOT_START,
VendingTileEntity.GENERAL_INVENTORY_SIZE - 1,
input1,
input2)) return null;
// See if the player can provide the payment
if (!InventoryHelper.doesInventoryContain(
playerInventory, 0, playerInventory.length - 1, input1, input2)) return null;
// OK - things should work. Do the transaction.
if (input1 != null) {
if (!entity.isAdminMode()) {
entity.addStackToOutput(input1.copy());
}
InventoryHelper.removeItemStackFromInventory(
playerInventory, input1.copy(), 0, playerInventory.length - 1);
}
if (input2 != null) {
if (!entity.isAdminMode()) {
entity.addStackToOutput(input2.copy());
}
InventoryHelper.removeItemStackFromInventory(
playerInventory, input2.copy(), 0, playerInventory.length - 1);
}
if (!entity.isAdminMode()) {
entity.removeStackFromOutput(result.copy());
}
player.inventory.addItemStackToInventory(result.copy());
// play a tink sound to signal the trade
if (player.worldObj.isRemote) player.playSound("random.orb", 0.5F, 5F);
player.onUpdate();
return null;
}