Introduce enchanted books

Author: ShockedPlot7560

src/crafting/AnvilCraftingManagerDataFiller.php

@@ -23,7 +23,9 @@
 
 namespace pocketmine\crafting;
 
+use pocketmine\data\bedrock\item\ItemTypeNames;
 use pocketmine\item\Durable;
+use pocketmine\item\ItemTypeIds;
 use pocketmine\item\ToolTier;
 use pocketmine\item\VanillaArmorMaterials;
 use pocketmine\item\VanillaItems;
@@ -64,12 +66,20 @@ public static function fillData(CraftingManager $manager) : CraftingManager{
 			}
 		}
 
+		$manager->registerAnvilRecipe(new ItemSelfCombineRecipe(
+			new MetaWildcardRecipeIngredient(ItemTypeNames::ENCHANTED_BOOK)
+		));
+
 		foreach(VanillaItems::getAll() as $item){
 			if($item instanceof Durable){
 				$itemId = GlobalItemDataHandlers::getSerializer()->serializeType($item)->getName();
 				$manager->registerAnvilRecipe(new ItemSelfCombineRecipe(
 					new MetaWildcardRecipeIngredient($itemId)
 				));
+				$manager->registerAnvilRecipe(new ItemDifferentCombineRecipe(
+					new MetaWildcardRecipeIngredient($itemId),
+					new EnchantedBookRecipeIngredient($item)
+				));
 			}
 		}
 

src/crafting/EnchantedBookRecipeIngredient.php

@@ -0,0 +1,67 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\crafting;
+
+use pocketmine\item\enchantment\AvailableEnchantmentRegistry;
+use pocketmine\item\Item;
+use pocketmine\item\ItemTypeIds;
+
+/**
+ * Recipe ingredient that matches enchanted books that can apply at least one enchantment to the target item.
+ */
+final class EnchantedBookRecipeIngredient implements RecipeIngredient{
+
+	public function __construct(
+		private Item $compareItem
+	){}
+
+	public function getCompareItem() : Item{ return $this->compareItem; }
+
+	public function accepts(Item $item) : bool{
+		if($item->getCount() < 1){
+			return false;
+		}
+
+		if($item->getTypeId() !== ItemTypeIds::ENCHANTED_BOOK){
+			// We only accept enchanted books in this ingredient
+			return false;
+		}
+
+		$enchantmentRegistry = AvailableEnchantmentRegistry::getInstance();
+		foreach($item->getEnchantments() as $compareEnchantment){
+			if($enchantmentRegistry->isAvailableForItem($compareEnchantment->getType(), $this->compareItem)){
+				// As long as one enchantment in the book is applicable to the target item
+				// the combination is possible, so we accept this item
+				return true;
+			}
+		}
+
+		return false;
+
+	}
+
+	public function __toString() : string{
+		return "EnchantedBookRecipeIngredient($this->compareItem)";
+	}
+}