package cofh.lib.util.helpers;
import cofh.api.transport.IItemDuct;
import java.util.List;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.ISidedInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraftforge.common.util.ForgeDirection;
/**
* This class contains helper functions related to Inventories and Inventory manipulation.
*
* @author King Lemming
*
*/
public class InventoryHelper {
private InventoryHelper() {
}
/**
* Copy an entire inventory. Best to avoid doing this often.
*/
public static ItemStack[] cloneInventory(ItemStack[] inventory) {
ItemStack[] inventoryCopy = new ItemStack[inventory.length];
for (int i = 0; i < inventory.length; i++) {
inventoryCopy[i] = inventory[i] == null ? null : inventory[i].copy();
}
return inventoryCopy;
}
/**
* Add an ItemStack to an inventory. Return true if the entire stack was added.
*
* @param inventory
* The inventory.
* @param stack
* ItemStack to add.
* @param startIndex
* First slot to attempt to add into. Does not loop around fully.
* @param endIndex
* Final slot to attempt to add into. Should be at most length - 1
*/
public static boolean addItemStackToInventory(ItemStack[] inventory, ItemStack stack, int startIndex, int endIndex) {
if (stack == null) {
return true;
}
int openSlot = -1;
for (int i = startIndex; i <= endIndex; i++) {
if (ItemHelper.itemsEqualForCrafting(stack, inventory[i]) && inventory[i].getMaxStackSize() > inventory[i].stackSize) {
int hold = inventory[i].getMaxStackSize() - inventory[i].stackSize;
if (hold >= stack.stackSize) {
inventory[i].stackSize += stack.stackSize;
stack = null;
return true;
} else {
stack.stackSize -= hold;
inventory[i].stackSize += hold;
}
} else if (inventory[i] == null && openSlot == -1) {
openSlot = i;
}
}
if (openSlot > -1) {
inventory[openSlot] = stack;
} else {
return false;
}
return true;
}
/**
* Shortcut method for above, assumes ending slot is length - 1
*/
public static boolean addItemStackToInventory(ItemStack[] inventory, ItemStack stack, int startIndex) {
return addItemStackToInventory(inventory, stack, startIndex, inventory.length - 1);
}
/**
* Shortcut method for above, assumes starting slot is 0.
*/
public static boolean addItemStackToInventory(ItemStack[] inventory, ItemStack stack) {
return addItemStackToInventory(inventory, stack, 0);
}
/* IInventoryHandler Interaction */
// IInventoryHandler is not currently implemented or used. Possibly in the future.
/* IInventory Interaction */
public static ItemStack extractItemStackFromInventory(IInventory inventory, int side) {
ItemStack retStack = null;
if (inventory instanceof ISidedInventory) {
ISidedInventory sidedInv = (ISidedInventory) inventory;
int slots[] = sidedInv.getAccessibleSlotsFromSide(side);
for (int i = 0; i < slots.length && retStack == null; i++) {
if (sidedInv.getStackInSlot(i) != null && sidedInv.canExtractItem(i, sidedInv.getStackInSlot(i), side)) {
retStack = sidedInv.getStackInSlot(i).copy();
sidedInv.setInventorySlotContents(i, null);
}
}
} else {
for (int i = 0; i < inventory.getSizeInventory() && retStack == null; i++) {
if (inventory.getStackInSlot(i) != null) {
retStack = inventory.getStackInSlot(i).copy();
inventory.setInventorySlotContents(i, null);
}
}
}
if (retStack != null) {
inventory.markDirty();
}
return retStack;
}
public static ItemStack insertItemStackIntoInventory(IInventory inventory, ItemStack stack, int side) {
if (stack == null) {
return null;
}
int stackSize = stack.stackSize;
if (inventory instanceof ISidedInventory) {
ISidedInventory sidedInv = (ISidedInventory) inventory;
int slots[] = sidedInv.getAccessibleSlotsFromSide(side);
if (slots == null) {
return stack;
}
for (int i = 0; i < slots.length && stack != null; i++) {
if (sidedInv.canInsertItem(slots[i], stack, side) && ItemHelper.itemsEqualWithMetadata(stack, inventory.getStackInSlot(slots[i]), true)) {
stack = addToOccupiedInventorySlot(sidedInv, slots[i], stack);
}
}
for (int i = 0; i < slots.length && stack != null; i++) {
if (sidedInv.canInsertItem(slots[i], stack, side) && inventory.getStackInSlot(slots[i]) == null) {
stack = addToEmptyInventorySlot(sidedInv, slots[i], stack);
}
}
} else {
int invSize = inventory.getSizeInventory();
for (int i = 0; i < invSize && stack != null; i++) {
if (ItemHelper.itemsEqualWithMetadata(stack, inventory.getStackInSlot(i), true)) {
stack = addToOccupiedInventorySlot(inventory, i, stack);
}
}
for (int i = 0; i < invSize && stack != null; i++) {
if (inventory.getStackInSlot(i) == null) {
stack = addToEmptyInventorySlot(inventory, i, stack);
}
}
}
if (stack == null || stack.stackSize != stackSize) {
inventory.markDirty();
}
return stack;
}
public static ItemStack simulateInsertItemStackIntoInventory(IInventory inventory, ItemStack stack, int side) {
if (stack == null) {
return null;
}
if (inventory instanceof ISidedInventory) {
ISidedInventory sidedInv = (ISidedInventory) inventory;
int slots[] = sidedInv.getAccessibleSlotsFromSide(side);
if (slots == null) {
return stack;
}
for (int i = 0; i < slots.length && stack != null; i++) {
if (sidedInv.canInsertItem(slots[i], stack, side) && ItemHelper.itemsEqualWithMetadata(stack, inventory.getStackInSlot(slots[i]), true)) {
stack = simulateAddToOccupiedInventorySlot(sidedInv, slots[i], stack);
}
}
for (int i = 0; i < slots.length && stack != null; i++) {
if (sidedInv.canInsertItem(slots[i], stack, side) && inventory.getStackInSlot(slots[i]) == null) {
stack = simulateAddToEmptyInventorySlot(sidedInv, slots[i], stack);
}
}
} else {
int invSize = inventory.getSizeInventory();
for (int i = 0; i < invSize && stack != null; i++) {
if (ItemHelper.itemsEqualWithMetadata(stack, inventory.getStackInSlot(i), true)) {
stack = simulateAddToOccupiedInventorySlot(inventory, i, stack);
}
}
for (int i = 0; i < invSize && stack != null; i++) {
if (inventory.getStackInSlot(i) == null) {
stack = simulateAddToEmptyInventorySlot(inventory, i, stack);
}
}
}
return stack;
}
/* Slot Interaction */
public static ItemStack addToEmptyInventorySlot(IInventory inventory, int slot, ItemStack stack) {
if (!inventory.isItemValidForSlot(slot, stack)) {
return stack;
}
int stackLimit = inventory.getInventoryStackLimit();
inventory.setInventorySlotContents(slot, ItemHelper.cloneStack(stack, Math.min(stack.stackSize, stackLimit)));
return stackLimit >= stack.stackSize ? null : stack.splitStack(stack.stackSize - stackLimit);
}
public static ItemStack addToOccupiedInventorySlot(IInventory inventory, int slot, ItemStack stack) {
ItemStack stackInSlot = inventory.getStackInSlot(slot);
int stackLimit = Math.min(inventory.getInventoryStackLimit(), stackInSlot.getMaxStackSize());
if (stack.stackSize + stackInSlot.stackSize > stackLimit) {
int stackDiff = stackLimit - stackInSlot.stackSize;
stackInSlot.stackSize = stackLimit;
stack.stackSize -= stackDiff;
inventory.setInventorySlotContents(slot, stackInSlot);
return stack;
}
stackInSlot.stackSize += Math.min(stack.stackSize, stackLimit);
inventory.setInventorySlotContents(slot, stackInSlot);
return stackLimit >= stack.stackSize ? null : stack.splitStack(stack.stackSize - stackLimit);
}
public static ItemStack simulateAddToEmptyInventorySlot(IInventory inventory, int slot, ItemStack stack) {
if (!inventory.isItemValidForSlot(slot, stack)) {
return stack;
}
int stackLimit = Math.min(inventory.getInventoryStackLimit(), stack.getMaxStackSize());
return stackLimit >= stack.stackSize ? null : stack.splitStack(stack.stackSize - stackLimit);
}
public static ItemStack simulateAddToOccupiedInventorySlot(IInventory inventory, int slot, ItemStack stack) {
ItemStack stackInSlot = inventory.getStackInSlot(slot);
int stackLimit = Math.min(inventory.getInventoryStackLimit(), stackInSlot.getMaxStackSize());
if (stack.stackSize + stackInSlot.stackSize > stackLimit) {
stack.stackSize -= stackLimit - stackInSlot.stackSize;
return stack;
}
return stackLimit >= stack.stackSize ? null : stack.splitStack(stack.stackSize - stackLimit);
}
public static boolean mergeItemStack(List<Slot> slots, ItemStack stack, int start, int length, boolean reverse) {
return mergeItemStack(slots, stack, start, length, reverse, true);
}
public static boolean mergeItemStack(List<Slot> slots, ItemStack stack, int start, int length, boolean r, boolean limit) {
boolean successful = false;
int i = !r ? start : length - 1;
int iterOrder = !r ? 1 : -1;
Slot slot;
ItemStack existingStack;
if (stack.isStackable()) {
while (stack.stackSize > 0 && (!r && i < length || r && i >= start)) {
slot = slots.get(i);
existingStack = slot.getStack();
if (slot.isItemValid(stack) && existingStack != null && existingStack.getItem().equals(stack.getItem())
&& (!stack.getHasSubtypes() || stack.getItemDamage() == existingStack.getItemDamage())
&& ItemStack.areItemStackTagsEqual(stack, existingStack)) {
int existingSize = existingStack.stackSize + stack.stackSize;
int maxStack = Math.min(stack.getMaxStackSize(), slot.getSlotStackLimit());
if (existingSize <= maxStack) {
stack.stackSize = 0;
existingStack.stackSize = existingSize;
slot.onSlotChanged();
successful = true;
} else if (existingStack.stackSize < maxStack) {
stack.stackSize -= maxStack - existingStack.stackSize;
existingStack.stackSize = maxStack;
slot.onSlotChanged();
successful = true;
}
}
i += iterOrder;
}
}
if (stack.stackSize > 0) {
i = !r ? start : length - 1;
while (stack.stackSize > 0 && (!r && i < length || r && i >= start)) {
slot = slots.get(i);
existingStack = slot.getStack();
if (slot.isItemValid(stack) && existingStack == null) {
int maxStack = limit ? Math.min(stack.getMaxStackSize(), slot.getSlotStackLimit()) : slot.getSlotStackLimit();
existingStack = stack.splitStack(Math.min(stack.stackSize, maxStack));
slot.putStack(existingStack);
slot.onSlotChanged();
successful = true;
}
i += iterOrder;
}
}
return successful;
}
/* HELPERS */
public static ItemStack addToInsertion(Object tile, int side, ItemStack stack) {
if (stack == null) {
return null;
}
if (tile instanceof IInventory) {
stack = insertItemStackIntoInventory((IInventory) tile, stack, BlockHelper.SIDE_OPPOSITE[side]);
} else {
stack = ((IItemDuct) tile).insertItem(ForgeDirection.VALID_DIRECTIONS[side ^ 1], stack);
}
return stack;
}
public static boolean isInventory(TileEntity tile) {
return tile instanceof IInventory;
}
public static boolean isInsertion(Object tile) {
return tile instanceof IInventory || tile instanceof IItemDuct;
}
}