Deduplicate a bunch of repeated type ID map code

src/data/bedrock/IntSaveIdMapTrait.php

@@ -0,0 +1,82 @@
+<?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\data\bedrock;
+
+use function abs;
+use function array_key_exists;
+use function spl_object_id;
+
+/**
+ * @phpstan-template TObject of object
+ */
+trait IntSaveIdMapTrait{
+
+	/**
+	 * @var object[]
+	 * @phpstan-var array<int, TObject>
+	 */
+	private array $idToEnum = [];
+
+	/**
+	 * @var int[]
+	 * @phpstan-var array<int, int>
+	 */
+	private array $enumToId = [];
+
+	/**
+	 * @phpstan-param TObject $enum
+	 */
+	protected function getRuntimeId(object $enum) : int{
+		//this is fine for enums and non-cloning object registries
+		return spl_object_id($enum);
+	}
+
+	/**
+	 * @phpstan-param TObject $enum
+	 */
+	public function register(int $saveId, object $enum) : void{
+		$this->idToEnum[$saveId] = $enum;
+		$this->enumToId[$this->getRuntimeId($enum)] = $saveId;
+	}
+
+	/**
+	 * @phpstan-return TObject|null
+	 */
+	public function fromId(int $id) : ?object{
+		//we might not have all the effect IDs registered
+		return $this->idToEnum[$id] ?? null;
+	}
+
+	/**
+	 * @phpstan-param TObject $enum
+	 */
+	public function toId(object $enum) : int{
+		$runtimeId = $this->getRuntimeId($enum);
+		if(!array_key_exists($runtimeId, $this->enumToId)){
+			//this should never happen, so we treat it as an exceptional condition
+			throw new \InvalidArgumentException("Object does not have a mapped save ID");
+		}
+		return $this->enumToId[$runtimeId];
+	}
+}