first commit

wp-content/plugins/sitepress-multilingual-cms/classes/utilities/Pager.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace WPML\Utils;
+
+use WPML\Collect\Support\Collection;
+
+class Pager {
+	/** @var string */
+	protected $optionName;
+
+	/** @var int */
+	protected $pageSize;
+
+	/**
+	 * @param string $optionName
+	 * @param int    $pageSize
+	 */
+	public function __construct( $optionName, $pageSize = 10 ) {
+		$this->optionName = $optionName;
+		$this->pageSize   = $pageSize;
+	}
+
+	/**
+	 * @param Collection $collection
+	 * @param callable   $callback
+	 * @param int        $timeout
+	 *
+	 * @return int
+	 */
+	public function iterate( Collection $collection, callable $callback, $timeout = PHP_INT_MAX ) {
+		$processedItems = $this->getProcessedCount();
+
+		$this->getItemsToProcess( $collection, $processedItems )->eachWithTimeout(
+			function ( $item ) use (
+			&$processedItems,
+			$callback
+			) {
+				return $callback( $item ) && ++ $processedItems;
+			},
+			$timeout
+		);
+
+		$remainingPages = $this->getRemainingPages( $collection, $processedItems );
+
+		if ( $remainingPages ) {
+			\update_option( $this->optionName, $processedItems );
+		} else {
+			\delete_option( $this->optionName );
+		}
+
+		return $remainingPages;
+	}
+
+	private function getItemsToProcess( Collection $collection, $processedItems ) {
+		return $collection->slice( $processedItems, $this->pageSize );
+	}
+
+	/**
+	 * @param Collection $collection
+	 *
+	 * @return int
+	 */
+	public function getPagesCount( Collection $collection ) {
+		return (int) ceil( $collection->count() / $this->pageSize );
+	}
+
+	/**
+	 * @param \WPML\Collect\Support\Collection $collection
+	 *
+	 * @return int
+	 */
+	protected function getRemainingPages( Collection $collection, $processedItems ) {
+		return (int) ceil( $collection->slice( $processedItems )->count() / $this->pageSize );
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getProcessedCount() {
+		return get_option( $this->optionName, 0 );
+	}
+}