RingRemovalRecipe.java

package com.yolp900.itsjustacharm.common.crafting;

import baubles.api.IBauble;
import com.yolp900.itsjustacharm.api.IJCConstants;
import com.yolp900.itsjustacharm.common.items.ItemBaubleRingHolder;
import com.yolp900.itsjustacharm.common.items.ModItems;
import com.yolp900.itsjustacharm.util.NBTHelper;
import net.minecraft.inventory.InventoryCrafting;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.IRecipe;
import net.minecraft.world.World;
import net.minecraftforge.common.ForgeHooks;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class RingRemovalRecipe implements IRecipe {

    @Override
    public boolean matches(@Nonnull InventoryCrafting inv, @Nonnull World worldIn) {
        ItemStack ring = null;
        for(int i = 0; i < inv.getSizeInventory(); i++) {
            ItemStack stack = inv.getStackInSlot(i);
            if (stack != null) {
                if (ring != null) {
                    return false;
                }
                if (stack.getItem() instanceof IBauble) {
                    ring = stack.copy();
                } else {
                    return false;
                }
            }
        }

        return ring != null && NBTHelper.getBoolean(ring, IJCConstants.NBT.BAUBLE_HOLDER);
    }

    @Nullable
    @Override
    public ItemStack getCraftingResult(@Nonnull InventoryCrafting inv) {
        ItemStack ring = null;

        for (int i = 0; i < inv.getSizeInventory(); i++) {
            ItemStack stack = inv.getStackInSlot(i);
            if (stack != null)
                ring = stack.copy();
        }

        if (ring == null || !(ring.getItem() instanceof IBauble) || !NBTHelper.getBoolean(ring, IJCConstants.NBT.BAUBLE_HOLDER)) {
            return null;
        }

        ItemStack output;
        ItemStack ring0 = NBTHelper.getItemStack(ring, IJCConstants.NBT.BAUBLE_ATTACHED(0));
        boolean advanced = NBTHelper.getBoolean(ring, IJCConstants.NBT.ADVANCED_BAUBLE_HOLDER);
        if (ring0 == null) {
            int meta = 0;
            if (advanced) {
                meta = 1;
            }
            output = new ItemStack(ModItems.BaubleRingHolder, 1, meta);
        } else {
            if (advanced) {
                ItemStack ring1 = NBTHelper.getItemStack(ring, IJCConstants.NBT.BAUBLE_ATTACHED(1));
                if (ring1 == null) {
                    output = ring0.copy();
                } else {
                    output = ring1.copy();
                }
            } else {
                output = ring0.copy();
            }
        }

        return output;
    }

    @Override
    public int getRecipeSize() {
        return 10;
    }

    @Nullable
    @Override
    public ItemStack getRecipeOutput() {
        return null;
    }

    @Override
    @Nonnull
    public ItemStack[] getRemainingItems(@Nonnull InventoryCrafting inv) {
        ItemStack ring = null;
        for(int i = 0; i < inv.getSizeInventory(); i++) {
            ItemStack stack = inv.getStackInSlot(i);
            if (stack != null) {
                if (ring != null) {
                    return ForgeHooks.defaultRecipeGetRemainingItems(inv);
                }
                if (stack.getItem() instanceof IBauble) {
                    ring = stack.copy();
                } else {
                    return ForgeHooks.defaultRecipeGetRemainingItems(inv);
                }
            }
        }

        if (ring != null && NBTHelper.getBoolean(ring, IJCConstants.NBT.BAUBLE_HOLDER)) {
            ItemStack output = getCraftingResult(inv);
            if (output == null) {
                return ForgeHooks.defaultRecipeGetRemainingItems(inv);
            }
            if (output.getItem() instanceof ItemBaubleRingHolder) {
                NBTHelper.getTag(ring).removeTag(IJCConstants.NBT.BAUBLE_HOLDER);
                if (NBTHelper.getBoolean(ring, IJCConstants.NBT.ADVANCED_BAUBLE_HOLDER)) {
                    NBTHelper.getTag(ring).removeTag(IJCConstants.NBT.ADVANCED_BAUBLE_HOLDER);
                }
            } else {
				boolean advanced = NBTHelper.getBoolean(ring, IJCConstants.NBT.ADVANCED_BAUBLE_HOLDER);
				ItemStack ring0 = NBTHelper.getItemStack(ring, IJCConstants.NBT.BAUBLE_ATTACHED(0));
				if (ring0 == null) {
					return ForgeHooks.defaultRecipeGetRemainingItems(inv);
				}
				if (advanced) {
					ItemStack ring1 = NBTHelper.getItemStack(ring, IJCConstants.NBT.BAUBLE_ATTACHED(1));
					if (ring1 == null) {
						NBTHelper.getTag(ring).removeTag(IJCConstants.NBT.BAUBLE_ATTACHED(0));
					} else {
						NBTHelper.getTag(ring).removeTag(IJCConstants.NBT.BAUBLE_ATTACHED(1));
					}
				} else {
					NBTHelper.getTag(ring).removeTag(IJCConstants.NBT.BAUBLE_ATTACHED(0));
				}

            }
            inv.clear();
            return new ItemStack[] {ring};
        } else {
            return ForgeHooks.defaultRecipeGetRemainingItems(inv);
        }
	}

}