Fixed EcoShapedRecipe

build.gradle

@@ -98,5 +98,5 @@ build.dependsOn publishToMavenLocal
 
 group = 'com.willfp'
 archivesBaseName = project.name
-version = '1.0.4'
+version = '2.0.0'
 java.sourceCompatibility = JavaVersion.VERSION_1_8

src/main/java/com/willfp/eco/spigot/EcoSpigotMain.java

@@ -0,0 +1,7 @@
+package com.willfp.eco.spigot;
+
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class EcoSpigotMain extends JavaPlugin {
+
+}

src/main/java/com/willfp/eco/util/NumberUtils.java

@@ -1,8 +1,10 @@
 package com.willfp.eco.util;
 
 import lombok.experimental.UtilityClass;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
+import java.util.Map;
 import java.util.TreeMap;
 import java.util.concurrent.ThreadLocalRandom;
 
@@ -85,6 +87,24 @@ public class NumberUtils {
         }
     }
 
+    /**
+     * Get number from roman numeral.
+     *
+     * @param numeral The numeral to convert.
+     * @return The number, converted from a roman numeral.
+     */
+    public static int fromNumeral(@NotNull final String numeral) {
+        if (numeral.isEmpty()) {
+            return 0;
+        }
+        for (Map.Entry<Integer, String> entry : NUMERALS.entrySet()) {
+            if (numeral.startsWith(entry.getValue())) {
+                return entry.getKey() + fromNumeral(numeral.substring(entry.getValue().length()));
+            }
+        }
+        return 0;
+    }
+
     /**
      * Generate random integer in range.
      *

src/main/java/com/willfp/eco/util/VectorUtils.java

@@ -6,9 +6,16 @@ import org.bukkit.util.Vector;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
 
 @UtilityClass
 public class VectorUtils {
+    /**
+     * Cached circles to prevent many sqrt calls.
+     */
+    private static final Map<Integer, Vector[]> CIRCLE_CACHE = new HashMap<>();
+
     /**
      * If vector has all components as finite.
      *
@@ -66,6 +73,11 @@ public class VectorUtils {
      * @return An array of {@link Vector}s.
      */
     public Vector[] getCircle(final int radius) {
+        Vector[] cached = CIRCLE_CACHE.get(radius);
+        if (cached != null) {
+            return cached;
+        }
+
         ArrayList<Vector> circleVecs = new ArrayList<>();
 
         double xoffset = -radius;
@@ -85,7 +97,9 @@ public class VectorUtils {
             zoffset++;
         }
 
-        return circleVecs.toArray(new Vector[0]);
+        Vector[] result = circleVecs.toArray(new Vector[0]);
+        CIRCLE_CACHE.put(radius, result);
+        return result;
     }
 
     /**

src/main/java/com/willfp/eco/util/drops/telekinesis/TelekinesisUtils.java

@@ -7,14 +7,31 @@ import org.bukkit.entity.Player;
 import org.bukkit.plugin.ServicePriority;
 import org.jetbrains.annotations.NotNull;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.function.Function;
 
 @UtilityClass
 public final class TelekinesisUtils {
+    /**
+     * Instance of registered telekinesis utils.
+     */
+    private final Object instance;
+
+    /**
+     * The class of the utils.
+     */
+    private final Class<?> clazz;
+
     /**
      * The test service registered to bukkit.
      */
-    private final TelekinesisTests tests;
+    private final Method testMethod;
+
+    /**
+     * The register service registered to bukkit.
+     */
+    private final Method registerMethod;
 
     /**
      * Test the player for telekinesis.
@@ -25,7 +42,13 @@ public final class TelekinesisUtils {
      * @return If the player is telekinetic.
      */
     public boolean testPlayer(@NotNull final Player player) {
-        return tests.testPlayer(player);
+        try {
+            return (boolean) testMethod.invoke(instance, player);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            e.printStackTrace();
+        }
+
+        return false;
     }
 
     /**
@@ -34,14 +57,35 @@ public final class TelekinesisUtils {
      * @param test The test to register, where the boolean output is if the player is telekinetic.
      */
     public void registerTest(@NotNull final Function<Player, Boolean> test) {
-        tests.registerTest(test);
+        try {
+            registerMethod.invoke(instance, test);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            e.printStackTrace();
+        }
     }
 
     static {
+        Method testMethod1;
+        Method registerMethod1;
         if (Bukkit.getServicesManager().getKnownServices().stream().noneMatch(clazz -> clazz.getName().contains("TelekinesisTests"))) {
             Bukkit.getServicesManager().register(TelekinesisTests.class, new EcoTelekinesisTests(), AbstractEcoPlugin.getInstance(), ServicePriority.Normal);
         }
 
-        tests = (TelekinesisTests) Bukkit.getServicesManager().load(Bukkit.getServicesManager().getKnownServices().stream().filter(clazz -> clazz.getName().contains("TelekinesisTests")).findFirst().get());
+        instance = Bukkit.getServicesManager().load(Bukkit.getServicesManager().getKnownServices().stream().filter(clazz -> clazz.getName().contains("TelekinesisTests")).findFirst().get());
+        clazz = instance.getClass();
+
+        try {
+            testMethod1 = clazz.getDeclaredMethod("testPlayer", Player.class);
+            registerMethod1 = clazz.getDeclaredMethod("registerTest", Function.class);
+            testMethod1.setAccessible(true);
+            registerMethod1.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+            testMethod1 = null;
+            registerMethod1 = null;
+        }
+
+        testMethod = testMethod1;
+        registerMethod = registerMethod1;
     }
 }

src/main/java/com/willfp/eco/util/plugin/AbstractEcoPlugin.java

@@ -39,6 +39,8 @@ import com.willfp.eco.util.integrations.placeholder.PlaceholderManager;
 import com.willfp.eco.util.integrations.placeholder.plugins.PlaceholderIntegrationPAPI;
 import com.willfp.eco.util.optional.Prerequisite;
 import com.willfp.eco.util.protocollib.AbstractPacketAdapter;
+import com.willfp.eco.util.recipe.RecipeListener;
+import com.willfp.eco.util.recipe.RecipeManager;
 import com.willfp.eco.util.updater.UpdateChecker;
 import lombok.Getter;
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
@@ -145,6 +147,12 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
     @Getter
     private final RunnableFactory runnableFactory;
 
+    /**
+     * Recipe handler for crafting recipes.
+     */
+    @Getter
+    private final RecipeManager recipeManager;
+
     /**
      * The loader for all plugin extensions.
      *
@@ -193,6 +201,7 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
         this.runnableFactory = new RunnableFactory(this);
         this.extensionLoader = new EcoExtensionLoader(this);
         this.configHandler = new ConfigHandler(this);
+        this.recipeManager = new RecipeManager(this);
     }
 
     /**
@@ -202,15 +211,15 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
     public final void onEnable() {
         super.onLoad();
 
-        this.getLog().info("==========================================");
+        this.getLog().info("");
         this.getLog().info("Loading " + this.color + this.pluginName);
-        this.getLog().info("==========================================");
 
         this.getEventManager().registerListener(new ArrowDataListener(this));
         this.getEventManager().registerListener(new NaturalExpGainListeners());
         this.getEventManager().registerListener(new ArmorListener());
         this.getEventManager().registerListener(new DispenserArmorListener());
         this.getEventManager().registerListener(new EntityDeathByEntityListeners(this));
+        this.getEventManager().registerListener(new RecipeListener(this));
 
         new FastCollatedDropQueue.CollatedRunnable(this);
 
@@ -237,8 +246,8 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
                 integrationLoader.load();
             }
         }));
+
         this.getLog().info("Loaded integrations: " + String.join(", ", this.getLoadedIntegrations()));
-        this.getLog().info("");
 
         Prerequisite.update();
 
@@ -265,6 +274,8 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
         this.updatableClasses.forEach(clazz -> this.getConfigHandler().registerUpdatableClass(clazz));
 
         this.enable();
+
+        this.getLog().info("");
     }
 
     /**
@@ -321,7 +332,7 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
 
         this.reload();
 
-        this.getLog().info("Loaded &a" + this.pluginName);
+        this.getLog().info("Loaded " + this.color + this.pluginName);
     }
 
     /**
@@ -329,6 +340,7 @@ public abstract class AbstractEcoPlugin extends JavaPlugin {
      */
     public final void reload() {
         this.getConfigHandler().callUpdate();
+        this.getConfigHandler().callUpdate(); // Call twice to fix issues
         this.getScheduler().cancelAll();
         new FastCollatedDropQueue.CollatedRunnable(this);
 

src/main/java/com/willfp/eco/util/protocollib/AbstractPacketAdapter.java

@@ -8,6 +8,7 @@ import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
 import com.willfp.eco.util.plugin.AbstractEcoPlugin;
 import lombok.Getter;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
@@ -60,8 +61,10 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * The code that should be executed once the packet has been received.
      *
      * @param packet The packet.
+     * @param player The player.
      */
-    public void onReceive(@NotNull final PacketContainer packet) {
+    public void onReceive(@NotNull final PacketContainer packet,
+                          @NotNull final Player player) {
         // Empty rather than abstract as implementations don't need both
     }
 
@@ -69,8 +72,10 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * THe code that should be executed once the packet has been sent.
      *
      * @param packet The packet.
+     * @param player The player.
      */
-    public void onSend(@NotNull final PacketContainer packet) {
+    public void onSend(@NotNull final PacketContainer packet,
+                       @NotNull final Player player) {
         // Empty rather than abstract as implementations don't need both
     }
 
@@ -89,7 +94,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
             return;
         }
 
-        onReceive(event.getPacket());
+        onReceive(event.getPacket(), event.getPlayer());
     }
 
     /**
@@ -107,7 +112,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
             return;
         }
 
-        onSend(event.getPacket());
+        onSend(event.getPacket(), event.getPlayer());
     }
 
     /**

src/main/java/com/willfp/eco/util/recipe/EcoShapedRecipe.java

@@ -0,0 +1,257 @@
+package com.willfp.eco.util.recipe;
+
+import com.willfp.eco.util.interfaces.Registerable;
+import com.willfp.eco.util.internal.PluginDependent;
+import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.util.recipe.parts.EmptyRecipePart;
+import com.willfp.eco.util.recipe.parts.RecipePart;
+import lombok.Getter;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Arrays;
+
+public final class EcoShapedRecipe extends PluginDependent implements Registerable {
+    /**
+     * Recipe parts.
+     */
+    private final RecipePart[] parts;
+
+    /**
+     * The key of the recipe.
+     */
+    @Getter
+    private final String key;
+
+    /**
+     * The recipe's output.
+     */
+    @Getter
+    private final ItemStack output;
+
+    private EcoShapedRecipe(@NotNull final AbstractEcoPlugin plugin,
+                            @NotNull final String key,
+                            @NotNull final RecipePart[] parts,
+                            @NotNull final ItemStack output) {
+        super(plugin);
+
+        this.parts = parts;
+        this.key = key;
+        this.output = output;
+    }
+
+    /**
+     * Get item material at a specific index.
+     *
+     * @param index The index to check.
+     * @return The material.
+     */
+    public Material getMaterialAtIndex(final int index) {
+        return parts[index].getDisplayed().getType();
+    }
+
+    /**
+     * Get "real" item at specific index.
+     *
+     * @param index The index to check.
+     * @return The item.
+     */
+    public ItemStack getDisplayedAtIndex(final int index) {
+        return parts[index].getDisplayed();
+    }
+
+    /**
+     * Test matrix against recipe.
+     *
+     * @param matrix The matrix to check.
+     * @return If the recipe matches.
+     */
+    public boolean test(@NotNull final ItemStack[] matrix) {
+        boolean matches = true;
+        for (int i = 0; i < 9; i++) {
+            if (!parts[i].matches(matrix[i])) {
+                matches = false;
+            }
+        }
+
+        return matches;
+    }
+
+    /**
+     * Register the recipe.
+     */
+    @Override
+    public void register() {
+        this.getPlugin().getRecipeManager().register(this);
+    }
+
+    @Override
+    public String toString() {
+        return "EcoShapedRecipe{"
+                + "parts=" + Arrays.toString(parts)
+                + ", key='" + key + '\''
+                + ", output=" + output
+                + '}';
+    }
+
+    /**
+     * Create a new recipe builder.
+     *
+     * @param plugin The plugin that owns the recipe.
+     * @param key    The recipe key.
+     * @return A new builder.
+     */
+    public static Builder builder(@NotNull final AbstractEcoPlugin plugin,
+                                  @NotNull final String key) {
+        return new Builder(plugin, key);
+    }
+
+    public static final class Builder {
+        /**
+         * The recipe parts.
+         */
+        private final RecipePart[] recipeParts = new RecipePart[9];
+
+        /**
+         * The output of the recipe.
+         */
+        private ItemStack output = null;
+
+        /**
+         * The key of the recipe.
+         */
+        private final String key;
+
+        /**
+         * The plugin that created the recipe.
+         */
+        private final AbstractEcoPlugin plugin;
+
+        /**
+         * Create a new recipe builder.
+         *
+         * @param plugin The plugin that owns the recipe.
+         * @param key    The recipe key.
+         */
+        private Builder(@NotNull final AbstractEcoPlugin plugin,
+                        @NotNull final String key) {
+            this.key = key;
+            this.plugin = plugin;
+        }
+
+        /**
+         * Set a recipe part.
+         *
+         * @param position The position of the recipe within a crafting matrix.
+         * @param part     The part of the recipe.
+         * @return The builder.
+         */
+        public Builder setRecipePart(@NotNull final RecipePosition position,
+                                     @NotNull final RecipePart part) {
+            this.recipeParts[position.getIndex()] = part;
+            return this;
+        }
+
+        /**
+         * Set a recipe part.
+         *
+         * @param position The position of the recipe within a crafting matrix.
+         * @param part     The part of the recipe.
+         * @return The builder.
+         */
+        public Builder setRecipePart(final int position,
+                                     @NotNull final RecipePart part) {
+            this.recipeParts[position] = part;
+            return this;
+        }
+
+        /**
+         * Set the output of the recipe.
+         *
+         * @param output The output.
+         * @return The builder.
+         */
+        public Builder setOutput(@NotNull final ItemStack output) {
+            this.output = output;
+            return this;
+        }
+
+        /**
+         * Build the recipe.
+         *
+         * @return The built recipe.
+         */
+        public EcoShapedRecipe build() {
+            for (int i = 0; i < 9; i++) {
+                if (recipeParts[i] == null) {
+                    recipeParts[i] = new EmptyRecipePart();
+                }
+            }
+
+            return new EcoShapedRecipe(plugin, key.toLowerCase(), recipeParts, output);
+        }
+    }
+
+    public enum RecipePosition {
+        /**
+         * Top left of matrix.
+         */
+        TOP_LEFT(0),
+
+        /**
+         * Top middle of matrix.
+         */
+        TOP_MIDDLE(1),
+
+        /**
+         * Top right of matrix.
+         */
+        TOP_RIGHT(2),
+
+        /**
+         * Middle left of matrix.
+         */
+        MIDDLE_LEFT(3),
+
+        /**
+         * Middle of matrix.
+         */
+        MIDDLE(4),
+
+        /**
+         * Middle right of matrix.
+         */
+        MIDDLE_RIGHT(5),
+
+        /**
+         * Bottom left of matrix.
+         */
+        BOTTOM_LEFT(6),
+
+        /**
+         * Bottom middle of matrix.
+         */
+        BOTTOM_MIDDLE(7),
+
+        /**
+         * Bottom right of matrix.
+         */
+        BOTTOM_RIGHT(8);
+
+        /**
+         * The index within a crafting table matrix.
+         */
+        @Getter
+        private final int index;
+
+        /**
+         * Recipe position with crafting table index.
+         *
+         * @param index The index.
+         */
+        RecipePosition(final int index) {
+            this.index = index;
+        }
+    }
+}

src/main/java/com/willfp/eco/util/recipe/RecipeListener.java

@@ -0,0 +1,89 @@
+package com.willfp.eco.util.recipe;
+
+import com.willfp.eco.util.internal.PluginDependent;
+import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import org.bukkit.Material;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.CraftItemEvent;
+import org.bukkit.event.inventory.PrepareItemCraftEvent;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.ShapedRecipe;
+import org.jetbrains.annotations.NotNull;
+
+public class RecipeListener extends PluginDependent implements Listener {
+    /**
+     * Pass an {@link AbstractEcoPlugin} in order to interface with it.
+     *
+     * @param plugin The plugin to manage.
+     */
+    public RecipeListener(@NotNull final AbstractEcoPlugin plugin) {
+        super(plugin);
+    }
+
+    /**
+     * Called on item craft.
+     *
+     * @param event The event to listen for.
+     */
+    @EventHandler
+    public void prepareCraftListener(@NotNull final PrepareItemCraftEvent event) {
+        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+            return;
+        }
+
+        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
+
+        if (!recipe.getKey().getNamespace().equals(this.getPlugin().getPluginName().toLowerCase())) {
+            return;
+        }
+
+        ItemStack[] matrix = event.getInventory().getMatrix();
+        EcoShapedRecipe matched = this.getPlugin().getRecipeManager().getMatch(matrix);
+
+        if (matched == null) {
+            event.getInventory().setResult(new ItemStack(Material.AIR));
+            return;
+        }
+
+        if (matched.test(matrix)) {
+            event.getInventory().setResult(matched.getOutput());
+        } else {
+            event.getInventory().setResult(new ItemStack(Material.AIR));
+        }
+    }
+
+    /**
+     * Called on item craft.
+     *
+     * @param event The event to listen for.
+     */
+    @EventHandler
+    public void craftListener(@NotNull final CraftItemEvent event) {
+        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+            return;
+        }
+
+        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
+
+        if (!recipe.getKey().getNamespace().equals(this.getPlugin().getPluginName().toLowerCase())) {
+            return;
+        }
+
+        ItemStack[] matrix = event.getInventory().getMatrix();
+        EcoShapedRecipe matched = this.getPlugin().getRecipeManager().getMatch(matrix);
+
+        if (matched == null) {
+            event.getInventory().setResult(new ItemStack(Material.AIR));
+            event.setCancelled(true);
+            return;
+        }
+
+        if (matched.test(matrix)) {
+            event.getInventory().setResult(matched.getOutput());
+        } else {
+            event.getInventory().setResult(new ItemStack(Material.AIR));
+            event.setCancelled(true);
+        }
+    }
+}

src/main/java/com/willfp/eco/util/recipe/RecipeManager.java

@@ -0,0 +1,80 @@
+package com.willfp.eco.util.recipe;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import com.willfp.eco.util.internal.PluginDependent;
+import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.RecipeChoice;
+import org.bukkit.inventory.ShapedRecipe;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@SuppressWarnings("deprecation")
+public class RecipeManager extends PluginDependent {
+    /**
+     * Registry of all recipes.
+     */
+    private final BiMap<String, EcoShapedRecipe> registry = HashBiMap.create();
+
+    /**
+     * Pass an {@link AbstractEcoPlugin} in order to interface with it.
+     *
+     * @param plugin The plugin to manage.
+     */
+    public RecipeManager(@NotNull final AbstractEcoPlugin plugin) {
+        super(plugin);
+    }
+
+    void register(@NotNull final EcoShapedRecipe recipe) {
+        String key = recipe.getKey();
+        registry.forcePut(key, recipe);
+
+        NamespacedKey baseKey = this.getPlugin().getNamespacedKeyFactory().create(key);
+        Bukkit.getServer().removeRecipe(baseKey);
+
+        NamespacedKey displayedKey = this.getPlugin().getNamespacedKeyFactory().create(key + "_displayed");
+        Bukkit.getServer().removeRecipe(displayedKey);
+
+        ShapedRecipe shapedRecipe = new ShapedRecipe(baseKey, recipe.getOutput());
+        shapedRecipe.shape("012", "345", "678");
+        for (int i = 0; i < 9; i++) {
+            char character = String.valueOf(i).toCharArray()[0];
+            shapedRecipe.setIngredient(character, recipe.getMaterialAtIndex(i));
+        }
+
+        ShapedRecipe displayedRecipe = new ShapedRecipe(displayedKey, recipe.getOutput());
+        displayedRecipe.shape("012", "345", "678");
+        for (int i = 0; i < 9; i++) {
+            char character = String.valueOf(i).toCharArray()[0];
+            displayedRecipe.setIngredient(character, new RecipeChoice.ExactChoice(recipe.getDisplayedAtIndex(i)));
+        }
+
+        Bukkit.getServer().addRecipe(shapedRecipe);
+        Bukkit.getServer().addRecipe(displayedRecipe);
+    }
+
+    /**
+     * Get recipe matching matrix.
+     *
+     * @param matrix The matrix to test.
+     * @return The match, or null if not found.
+     */
+    @Nullable
+    public EcoShapedRecipe getMatch(@NotNull final ItemStack[] matrix) {
+        return registry.values().stream().filter(recipe -> recipe.test(matrix)).findFirst().orElse(null);
+    }
+
+    /**
+     * Get shaped recipe by key.
+     *
+     * @param key The key.
+     * @return The shaped recipe, or null if not found.
+     */
+    @Nullable
+    public EcoShapedRecipe getShapedRecipe(@NotNull final String key) {
+        return registry.get(key);
+    }
+}

src/main/java/com/willfp/eco/util/recipe/lookup/EcoItemLookup.java

@@ -0,0 +1,39 @@
+package com.willfp.eco.util.recipe.lookup;
+
+import com.willfp.eco.util.recipe.parts.EmptyRecipePart;
+import com.willfp.eco.util.recipe.parts.RecipePart;
+import com.willfp.eco.util.recipe.parts.SimpleRecipePart;
+import org.bukkit.Material;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+public class EcoItemLookup implements ItemLookup {
+    /**
+     * Set of tests that return if the player is telekinetic.
+     */
+    private final Map<String, Function<String, RecipePart>> tests = new HashMap<>();
+
+    @Override
+    public void registerLookup(@NotNull final String key,
+                               @NotNull final Function<String, RecipePart> lookup) {
+        tests.put(key, lookup);
+    }
+
+    @Override
+    public RecipePart lookup(@NotNull final String key) {
+        Function<String, RecipePart> lookup = tests.get(key);
+
+        if (lookup == null) {
+            Material material = Material.getMaterial(key.toUpperCase());
+            if (material == null || material == Material.AIR) {
+                return new EmptyRecipePart();
+            }
+            return new SimpleRecipePart(material);
+        }
+
+        return lookup.apply(key);
+    }
+}

src/main/java/com/willfp/eco/util/recipe/lookup/ItemLookup.java

@@ -0,0 +1,25 @@
+package com.willfp.eco.util.recipe.lookup;
+
+import com.willfp.eco.util.recipe.parts.RecipePart;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Function;
+
+public interface ItemLookup {
+    /**
+     * Register a new lookup.
+     *
+     * @param key    The key of the lookup.
+     * @param lookup The lookup to register, where the output is the recipe part generated.
+     */
+    void registerLookup(@NotNull String key,
+                        @NotNull Function<String, RecipePart> lookup);
+
+    /**
+     * Lookup recipe part from string.
+     *
+     * @param key The string to test.
+     * @return The generated recipe part, or null if invalid.
+     */
+    RecipePart lookup(@NotNull String key);
+}

src/main/java/com/willfp/eco/util/recipe/lookup/RecipePartUtils.java

@@ -0,0 +1,48 @@
+package com.willfp.eco.util.recipe.lookup;
+
+import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.util.recipe.parts.RecipePart;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.ServicePriority;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Function;
+
+@SuppressWarnings("unchecked")
+@UtilityClass
+public final class RecipePartUtils {
+    /**
+     * Item lookup instance.
+     */
+    private static final ItemLookup itemLookup;
+
+    /**
+     * Lookup recipe part from string.
+     *
+     * @param key The string to test.
+     * @return The generated recipe part, or null if invalid.
+     */
+    public RecipePart lookup(@NotNull final String key) {
+        return itemLookup.lookup(key);
+    }
+
+    /**
+     * Register a new lookup.
+     *
+     * @param key    The key of the lookup.
+     * @param lookup The lookup to register, where the output is the recipe part generated.
+     */
+    public void registerLookup(@NotNull final String key,
+                               @NotNull final Function<String, RecipePart> lookup) {
+        itemLookup.registerLookup(key, lookup);
+    }
+
+    static {
+        if (!Bukkit.getServicesManager().isProvidedFor(ItemLookup.class)) {
+            Bukkit.getServicesManager().register(ItemLookup.class, new EcoItemLookup(), AbstractEcoPlugin.getInstance(), ServicePriority.Normal);
+        }
+
+        itemLookup = Bukkit.getServicesManager().load(ItemLookup.class);
+    }
+}

src/main/java/com/willfp/eco/util/recipe/parts/ComplexRecipePart.java

@@ -0,0 +1,42 @@
+package com.willfp.eco.util.recipe.parts;
+
+import lombok.Getter;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.function.Predicate;
+
+public class ComplexRecipePart implements RecipePart {
+    /**
+     * The test for itemstacks to pass.
+     */
+    @Getter
+    private final Predicate<ItemStack> predicate;
+
+    /**
+     * Displayed itemstack: what the user should see.
+     */
+    private final ItemStack displayed;
+
+    /**
+     * Create a new complex recipe part.
+     * @param predicate The test.
+     * @param displayed The example itemstack.
+     */
+    public ComplexRecipePart(@NotNull final Predicate<ItemStack> predicate,
+                             @NotNull final ItemStack displayed) {
+        this.predicate = predicate;
+        this.displayed = displayed;
+    }
+
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return predicate.test(itemStack);
+    }
+
+    @Override
+    public ItemStack getDisplayed() {
+        return displayed;
+    }
+}

src/main/java/com/willfp/eco/util/recipe/parts/EmptyRecipePart.java

@@ -0,0 +1,30 @@
+package com.willfp.eco.util.recipe.parts;
+
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public class EmptyRecipePart implements RecipePart {
+    /**
+     * Create a new empty recipe part.
+     */
+    public EmptyRecipePart() {
+
+    }
+
+    /**
+     * If the item is empty.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is empty.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack == null || itemStack.getType() == Material.AIR;
+    }
+
+    @Override
+    public ItemStack getDisplayed() {
+        return new ItemStack(Material.AIR);
+    }
+}

src/main/java/com/willfp/eco/util/recipe/parts/RecipePart.java

@@ -0,0 +1,22 @@
+package com.willfp.eco.util.recipe.parts;
+
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public interface RecipePart {
+    /**
+     * If an ItemStack matches the recipe part.
+     *
+     * @param itemStack The item to test.
+     * @return If the item matches.
+     */
+    boolean matches(@Nullable ItemStack itemStack);
+
+    /**
+     * Get a displayed itemstack, for autocraft.
+     *
+     * @return The item, displayed.
+     */
+    ItemStack getDisplayed();
+}
+

src/main/java/com/willfp/eco/util/recipe/parts/SimpleRecipePart.java

@@ -0,0 +1,40 @@
+package com.willfp.eco.util.recipe.parts;
+
+import lombok.Getter;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class SimpleRecipePart implements RecipePart {
+    /**
+     * The material.
+     */
+    @Getter
+    private final Material material;
+
+    /**
+     * Create a new simple recipe part.
+     *
+     * @param material The material.
+     */
+    public SimpleRecipePart(@NotNull final Material material) {
+        this.material = material;
+    }
+
+    /**
+     * If the item matches the material.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is of the specified material.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack != null && itemStack.getType() == material;
+    }
+
+    @Override
+    public ItemStack getDisplayed() {
+        return new ItemStack(material);
+    }
+}

src/main/resources/plugin.yml

@@ -0,0 +1,21 @@
+name: eco
+version: 2.0.0
+main: com.willfp.eco.spigot.EcoSpigotMain
+api-version: 1.15
+authors: [Auxilor]
+website: willfp.com
+load: STARTUP
+depend:
+  - ProtocolLib
+softdepend:
+  - WorldGuard
+  - GriefPrevention
+  - Towny
+  - FactionsUUID
+  - Lands
+  - Kingdoms
+  - NoCheatPlus
+  - AAC
+  - Matrix
+  - Spartan
+  - PlaceholderAPI