From b38c81c96ff3a3b8d5735eb53b9abcb9c9e17ca2 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Fri, 22 Mar 2019 18:11:32 +0000
Subject: [PATCH] backport f84a1729c: Inventory: added swap() function

---
 src/pocketmine/inventory/BaseInventory.php | 7 +++++++
 src/pocketmine/inventory/Inventory.php     | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index 6f32492fc..bc6f7dcfb 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -378,6 +378,13 @@ abstract class BaseInventory implements Inventory{
 		}
 	}
 
+	public function swap(int $slot1, int $slot2) : void{
+		$i1 = $this->getItem($slot1);
+		$i2 = $this->getItem($slot2);
+		$this->setItem($slot1, $i2);
+		$this->setItem($slot2, $i1);
+	}
+
 	/**
 	 * @return Player[]
 	 */
diff --git a/src/pocketmine/inventory/Inventory.php b/src/pocketmine/inventory/Inventory.php
index 94677a75e..1bf84060f 100644
--- a/src/pocketmine/inventory/Inventory.php
+++ b/src/pocketmine/inventory/Inventory.php
@@ -215,6 +215,14 @@ interface Inventory{
 	 */
 	public function clearAll(bool $send = true) : void;
 
+	/**
+	 * Swaps the specified slots.
+	 *
+	 * @param int $slot1
+	 * @param int $slot2
+	 */
+	public function swap(int $slot1, int $slot2) : void;
+
 	/**
 	 * Gets all the Players viewing the inventory
 	 * Players will view their inventory at all times, even when not open.