ParchmentMC/patches/server/0012-Add-Furnace-Recipe-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: lexikiq <noellekiq@gmail.com>
Date: Tue, 13 Jul 2021 17:27:45 -0400
Subject: [PATCH] Add Furnace Recipe API

Temporary API to get the result of smelting an item in a (type of) furnace.

Will eventually (hopefully) be replaced by a more extensive Paper PR with support for all recipes.

diff --git a/src/main/java/gg/projecteden/parchment/inventory/CraftRecipeType.java b/src/main/java/gg/projecteden/parchment/inventory/CraftRecipeType.java
new file mode 100644
index 0000000000000000000000000000000000000000..5549da2a0b0790699abff627148a6b15ca37febf
--- /dev/null
+++ b/src/main/java/gg/projecteden/parchment/inventory/CraftRecipeType.java
@@ -0,0 +1,44 @@
+package gg.projecteden.parchment.inventory;
+
+import net.minecraft.world.item.crafting.AbstractCookingRecipe;
+
+public class CraftRecipeType {
+    public static net.minecraft.world.item.crafting.RecipeType asNMS(RecipeType recipeType) {
+        return switch (recipeType) {
+            case CRAFTING -> net.minecraft.world.item.crafting.RecipeType.CRAFTING;
+            case SMELTING -> net.minecraft.world.item.crafting.RecipeType.SMELTING;
+            case BLASTING -> net.minecraft.world.item.crafting.RecipeType.BLASTING;
+            case SMOKING -> net.minecraft.world.item.crafting.RecipeType.SMOKING;
+            case CAMPFIRE_COOKING -> net.minecraft.world.item.crafting.RecipeType.CAMPFIRE_COOKING;
+            case STONECUTTING -> net.minecraft.world.item.crafting.RecipeType.STONECUTTING;
+            case SMITHING -> net.minecraft.world.item.crafting.RecipeType.SMITHING;
+        };
+    }
+
+    public static RecipeType asBukkit(net.minecraft.world.item.crafting.RecipeType recipeType) {
+        if (recipeType == net.minecraft.world.item.crafting.RecipeType.CRAFTING) {
+            return RecipeType.CRAFTING;
+        } else if (recipeType == net.minecraft.world.item.crafting.RecipeType.SMELTING) {
+            return RecipeType.SMELTING;
+        } else if (recipeType == net.minecraft.world.item.crafting.RecipeType.BLASTING) {
+            return RecipeType.BLASTING;
+        } else if (recipeType == net.minecraft.world.item.crafting.RecipeType.SMOKING) {
+            return RecipeType.SMOKING;
+        } else if (recipeType == net.minecraft.world.item.crafting.RecipeType.CAMPFIRE_COOKING) {
+            return RecipeType.CAMPFIRE_COOKING;
+        } else if (recipeType == net.minecraft.world.item.crafting.RecipeType.STONECUTTING) {
+            return RecipeType.STONECUTTING;
+        } else if (recipeType == net.minecraft.world.item.crafting.RecipeType.SMITHING) {
+            return RecipeType.SMITHING;
+        }
+        throw new IllegalArgumentException("Unknown recipe type");
+    }
+
+    public static net.minecraft.world.item.crafting.RecipeType<AbstractCookingRecipe> asCookingRecipe(RecipeType recipeType) {
+        try {
+            return (net.minecraft.world.item.crafting.RecipeType<AbstractCookingRecipe>) asNMS(recipeType);
+        } catch (ClassCastException exc) {
+            throw new IllegalArgumentException("Recipe type must be a cooking recipe");
+        }
+    }
+}
diff --git a/src/main/java/gg/projecteden/parchment/inventory/SingletonContainer.java b/src/main/java/gg/projecteden/parchment/inventory/SingletonContainer.java
new file mode 100644
index 0000000000000000000000000000000000000000..e7114e456f818d7bdd4081620f4b9b9376679145
--- /dev/null
+++ b/src/main/java/gg/projecteden/parchment/inventory/SingletonContainer.java
@@ -0,0 +1,151 @@
+package gg.projecteden.parchment.inventory;
+
+import com.google.common.base.Preconditions;
+import net.minecraft.world.Container;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.inventory.InventoryHolder;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A container which holds only one item and returns similar values to that of
+ * {@link net.minecraft.world.SimpleContainer SimpleContainer}, meaning it will raise
+ * {@link IndexOutOfBoundsException IndexOutOfBoundsExceptions} and return empty item stacks
+ * where applicable to mirror that class.
+ */
+public class SingletonContainer implements net.minecraft.world.Container {
+
+    private @NotNull ItemStack item;
+    private int maxStackSize = Container.MAX_STACK;
+
+    public SingletonContainer() {
+        this.item = ItemStack.EMPTY;
+    }
+
+    public SingletonContainer(@NotNull ItemStack item) {
+        this.item = Preconditions.checkNotNull(item, "item");
+    }
+
+    public SingletonContainer(org.bukkit.inventory.@NotNull ItemStack item) {
+        this.item = CraftItemStack.asNMSCopy(Preconditions.checkNotNull(item, "item"));
+    }
+
+    public SingletonContainer(@NotNull Material material) {
+        this(new org.bukkit.inventory.ItemStack(Preconditions.checkNotNull(material, "material")));
+    }
+
+    private static void throwIndexException(int index) {
+        throw new IndexOutOfBoundsException("Received slot " + index + ", expected 0");
+    }
+
+    @Override
+    public int getContainerSize() {
+        return 1;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return item.isEmpty();
+    }
+
+    @Override
+    public ItemStack getItem(int slot) {
+        if (slot < 0) {
+            throwIndexException(slot);
+        }
+        return slot == 0 ? item : ItemStack.EMPTY;
+    }
+
+    @Override
+    public ItemStack removeItem(int slot, int amount) {
+        if (slot < 0) {
+            throwIndexException(slot);
+        }
+        ItemStack itemStack = slot == 0 && !item.isEmpty() ? item.split(amount) : ItemStack.EMPTY;
+        if (!itemStack.isEmpty()) {
+            setChanged();
+        }
+        return itemStack;
+    }
+
+    @Override
+    public ItemStack removeItemNoUpdate(int slot) {
+        if (slot != 0) {
+            throwIndexException(slot);
+        }
+        ItemStack oldItem = item;
+        item = ItemStack.EMPTY;
+        return oldItem.isEmpty() ? ItemStack.EMPTY : oldItem;
+    }
+
+    @Override
+    public void setItem(int slot, ItemStack stack) {
+        if (slot != 0) {
+            throwIndexException(slot);
+        }
+        item = stack;
+    }
+
+    @Override
+    public int getMaxStackSize() {
+        return maxStackSize;
+    }
+
+    @Override
+    public void setMaxStackSize(int size) {
+        maxStackSize = size;
+    }
+
+    @Override
+    public void setChanged() {
+
+    }
+
+    @Override
+    public boolean stillValid(Player player) {
+        return true;
+    }
+
+    @Override
+    public List<ItemStack> getContents() {
+        return Collections.singletonList(item);
+    }
+
+    @Override
+    public void onOpen(CraftHumanEntity who) {
+
+    }
+
+    @Override
+    public void onClose(CraftHumanEntity who) {
+
+    }
+
+    @Override
+    public List<HumanEntity> getViewers() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public InventoryHolder getOwner() {
+        return null;
+    }
+
+    @Override
+    public Location getLocation() {
+        return null;
+    }
+
+    @Override
+    public void clearContent() {
+        item = ItemStack.EMPTY;
+    }
+}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 5e9055fdf411029ea2fed91acd6b981f79156418..9f719150a0369ddb76da88635e05ff701759a1ed 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -2395,4 +2395,11 @@ public class CraftWorld extends CraftRegionAccessor implements World {
         return this.adventure$pointers;
     }
     // Paper end
+
+    // Parchment start
+    @Override
+    public ItemStack smeltItem(ItemStack toSmelt, gg.projecteden.parchment.inventory.RecipeType recipeType) {
+        return world.getRecipeManager().getRecipeFor(gg.projecteden.parchment.inventory.CraftRecipeType.asCookingRecipe(recipeType), new gg.projecteden.parchment.inventory.SingletonContainer(toSmelt), world).map(recipe -> recipe.getResultItem(world.registryAccess()).getBukkitStack()).orElse(null);
+    }
+    // Parchment end
 }