Add FarmlandHydrationChangeEvent (#5916)

src/event/block/FarmlandHydrationChangeEvent.php

@@ -0,0 +1,59 @@
+<?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\event\block;
+
+use pocketmine\block\Block;
+use pocketmine\block\Farmland;
+use pocketmine\event\Cancellable;
+use pocketmine\event\CancellableTrait;
+
+/**
+ * Called when farmland hydration is updated.
+ */
+class FarmlandHydrationChangeEvent extends BlockEvent implements Cancellable{
+	use CancellableTrait;
+
+	public function __construct(
+		Block $block,
+		private int $oldHydration,
+		private int $newHydration,
+	){
+		parent::__construct($block);
+	}
+
+	public function getOldHydration() : int{
+		return $this->oldHydration;
+	}
+
+	public function getNewHydration() : int{
+		return $this->newHydration;
+	}
+
+	public function setNewHydration(int $hydration) : void{
+		if($hydration < 0 || $hydration > Farmland::MAX_WETNESS){
+			throw new \InvalidArgumentException("Hydration must be in range 0 ... " . Farmland::MAX_WETNESS);
+		}
+		$this->newHydration = $hydration;
+	}
+}