first commit

wp-content/plugins/woocommerce-pdf-invoices-packing-slips/ubl/Collections/Collection.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace WPO\WC\UBL\Collections;
+
+use Iterator;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly
+}
+
+abstract class Collection implements Iterator {
+	
+	/** @var array */
+	private $items = array();
+
+	/** @var int */
+	private $position = 0;  
+
+	public function __construct() {
+		$this->position = 0;
+	}
+
+	public function rewind() {
+		$this->position = 0;
+	}
+
+	public function current() {
+		return $this->items[ $this->position ];
+	}
+
+	public function key() {
+		return $this->position;
+	}
+
+	public function next() {
+		++$this->position;
+	}
+
+	public function valid() {
+		return isset( $this->items[ $this->position ] );
+	}
+	
+}