CustomRecipeHandler.java

import java.util.List;

import org.bukkit.Bukkit;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.PrepareItemCraftEvent;
import org.bukkit.inventory.CraftingInventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.ShapedRecipe;
import org.bukkit.inventory.ShapelessRecipe;
import org.ourcraft.daskrr.smp.SMP;
import org.ourcraft.daskrr.smp.inventory.InventoryUtils;

import com.google.common.collect.Lists;

public class CustomRecipeHandler
{
    public static List<CustomRecipe> RECIPES = Lists.newArrayList();

    public CustomRecipeHandler ()
    {
        register();
    }

    private void register()
    {
        Listener l = new Listener ()
        {
            @EventHandler
            public void craft (PrepareItemCraftEvent e)
            {
                for (CustomRecipe recipe : RECIPES)
                {
                    if (recipe instanceof CustomShapedRecipe)
                    {
                        CustomShapedRecipe shapedRecipe = (CustomShapedRecipe) recipe;

                        CraftingInventory inv = e.getInventory();
                        if (inv.getResult() == null)
                            continue;

                        if (!inv.getResult().equals(recipe.result))
                            continue;

                        matrixLoop: for (int i = 0; i < 9; i++)
                            if (inv.getMatrix()[i] == null)
                            {
                                if (shapedRecipe.getMatrix()[i] != null)
                                {
                                    inv.setResult(null);
                                    break matrixLoop;
                                }
                            }
                            else
                            {
                                if (shapedRecipe.getMatrix() == null)
                                {
                                    inv.setResult(null);
                                    break matrixLoop;
                                }

                                if (!InventoryUtils.compareItems(inv.getMatrix()[i], shapedRecipe.getMatrix()[i]))
                                {
                                    inv.setResult(null);
                                    break matrixLoop;
                                }
                            }
                    }
                    else if (recipe instanceof CustomShapelessRecipe)
                    {
                        CustomShapelessRecipe shapelessRecipe = (CustomShapelessRecipe) recipe;

                        CraftingInventory inv = e.getInventory();
                        if (inv.getResult() == null)
                            continue;

                        if (!inv.getResult().equals(recipe.result))
                            continue;

                        matrixLoop: for (ItemStack ing : shapelessRecipe.getIngredients())
                        {
                            boolean found = false;

                            for (ItemStack in : inv.getContents())
                                if (InventoryUtils.compareItems(ing, in))
                                    found = true;

                            if (!found)
                            {
                                inv.setResult(null);
                                break matrixLoop;
                            }
                        }
                    }
                }
            }
        };

        Bukkit.getPluginManager().registerEvents(l, SMP.PLUGIN);
    }

    public void addRecipe (CustomShapedRecipe recipe)
    {
        RECIPES.add(recipe);

        Bukkit.getServer().addRecipe(recipe.getBukkitRecipe());
    }

    public void addRecipe (ShapedRecipe recipe)
    {
        RECIPES.add(new CustomShapedRecipe(recipe));

        Bukkit.getServer().addRecipe(recipe);
    }

    public void addRecipe (ShapelessRecipe recipe)
    {
        RECIPES.add(new CustomShapelessRecipe(recipe));

        Bukkit.getServer().addRecipe(recipe);
    }

    public void addRecipe (CustomShapelessRecipe recipe)
    {
        RECIPES.add(recipe);

        Bukkit.getServer().addRecipe(recipe.getBukkitRecipe());
    }

}