<?php

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/**

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* Handles all the stats related functions

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*

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* @package Smush\Core\Integrations\NextGen

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* @version 1.0

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*

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* @author Umesh Kumar <umesh@incsub.com>

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*

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* @copyright (c) 2016, Incsub (http://incsub.com)

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*/

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namespace Smush\Core\Integrations\NextGen;

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use C_Component_Registry;

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use C_Gallery_Storage;

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use C_NextGen_Serializable;

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use Exception;

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use Ngg_Serializable;

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use Smush\Core\Attachment_Id_List;

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use Smush\Core\Integrations\NextGen;

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use WP_Smush;

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if ( ! defined( 'WPINC' ) ) {

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die;

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}

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/**

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* Class

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*

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* TODO refactor stats by using the new core stats to clean the code.

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*/

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class Stats extends NextGen {

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const REOPTIMIZE_LIST_OPTION_ID = 'wp-smush-nextgen-reoptimize-list';

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const SUPPER_SMUSHED_LIST_OPTION_ID = 'wp-smush-nextgen-super-smushed-list';

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const SMUSH_STATS_OPTION_ID = 'wp_smush_stats_nextgen';

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/**

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* Contains the total Stats, for displaying it on bulk page

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*

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* @var array

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*/

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public $stats = array();

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/**

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* PRO user status.

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*

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* @var bool

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*/

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private $is_pro_user;

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/**

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* @var Attachment_Id_List

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*/

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private $reoptimize_list;

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/**

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* @var Attachment_Id_List

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*/

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private $supper_smushed_list;

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/**

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* @var null|array

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*/

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private $global_stats;

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/**

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* @var null|array

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*/

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private $unsmushed_images;

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/**

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* @var null|int.

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*/

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private $remaining_count;

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/**

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* @var int

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*/

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private $percent_optimized = 0;

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/**

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* Stats constructor.

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*/

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public function __construct() {

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parent::__construct();

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$this->is_pro_user = WP_Smush::is_pro();

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$this->reoptimize_list = new Attachment_Id_List( self::REOPTIMIZE_LIST_OPTION_ID );

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$this->supper_smushed_list = new Attachment_Id_List( self::SUPPER_SMUSHED_LIST_OPTION_ID );

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// Clear stats cache when an image is restored.

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add_action( 'wp_smush_image_nextgen_restored', array( $this, 'clear_cache' ) );

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// Add the resizing stats to Global stats.

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add_action( 'wp_smush_image_nextgen_resized', array( $this, 'update_stats' ), '', 2 );

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// Get the stats for single image, update the global stats.

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add_action( 'wp_smush_nextgen_image_stats', array( $this, 'update_stats' ), '', 2 );

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}

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/**

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* Get the images id for nextgen gallery

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*

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* @param bool $force_refresh Optional. Whether to force the cache to be refreshed.

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* Default false.

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*

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* @param bool $return_ids Whether to return the ids array, set to false by default.

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*

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* @return int|mixed Returns the images ids or the count

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*/

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public static function total_count( $force_refresh = false, $return_ids = false ) {

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// Check for the wp_smush_images in the 'nextgen' group.

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$attachment_ids = wp_cache_get( 'wp_smush_images', 'nextgen' );

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// If nothing is found, build the object.

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if ( true === $force_refresh || false === $attachment_ids ) {

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// Get the nextgen image IDs.

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$attachment_ids = self::get_nextgen_attachments();

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if ( ! is_wp_error( $attachment_ids ) ) {

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// In this case we don't need a timed cache expiration.

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wp_cache_set( 'wp_smush_images', $attachment_ids, 'nextgen' );

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}

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}

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return $return_ids ? $attachment_ids : count( $attachment_ids );

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}

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/**

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* Returns the ngg images list(id and meta ) or count

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*

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* @param string $type Whether to return smushed images or unsmushed images.

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* @param bool|false $count Return count only.

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* @param bool|false $force_update True/false to update the cache or not.

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*

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* @return bool|mixed Returns assoc array of image ids and meta or Image count

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*

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* @throws Exception Exception.

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*/

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public function get_ngg_images( $type = 'smushed', $count = false, $force_update = false ) {

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global $wpdb;

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$limit = apply_filters( 'wp_smush_nextgen_query_limit', 1000 );

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$offset = 0;

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// Check type of images being queried.

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if ( ! in_array( $type, array( 'smushed', 'unsmushed' ), true ) ) {

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return false;

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}

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// Check for the wp_smush_images_smushed in the 'nextgen' group.

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$images = wp_cache_get( 'wp_smush_images_' . $type, 'nextgen' );

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// If nothing is found, build the object.

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if ( ! $images || $force_update ) {

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// Query Attachments for meta key.

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$attachments = $wpdb->get_results( $wpdb->prepare( "SELECT pid, meta_data FROM {$wpdb->nggpictures} LIMIT %d, %d", $offset, $limit ) ); // Db call ok.

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while ( ! empty( $attachments ) ) {

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foreach ( $attachments as $attachment ) {

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// Check if it has `wp_smush` key.

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if ( class_exists( 'Ngg_Serializable' ) ) {

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$meta = ( new Ngg_Serializable() )->unserialize( $attachment->meta_data );

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} elseif ( class_exists( 'C_NextGen_Serializable' ) && method_exists( 'C_NextGen_Serializable', 'unserialize' ) ) {

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$meta = C_NextGen_Serializable::unserialize( $attachment->meta_data );

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} else {

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// If you can't parse it without NextGen - don't parse at all.

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continue;

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}

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// Store pid in image meta.

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if ( is_array( $meta ) && empty( $meta['pid'] ) ) {

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$meta['pid'] = $attachment->pid;

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} elseif ( is_object( $meta ) && empty( $meta->pid ) ) {

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$meta->pid = $attachment->pid;

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}

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// Check meta for wp_smush.

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if ( ! is_array( $meta ) || empty( $meta['wp_smush'] ) ) {

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$unsmushed_images[ $attachment->pid ] = $meta;

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continue;

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}

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$smushed_images[ $attachment->pid ] = $meta;

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}

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// Set the offset.

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$offset += $limit;

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$attachments = $wpdb->get_results( $wpdb->prepare( "SELECT pid, meta_data FROM {$wpdb->nggpictures} LIMIT %d, %d", $offset, $limit ) ); // Db call ok.

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}

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if ( ! empty( $smushed_images ) ) {

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wp_cache_set( 'wp_smush_images_smushed', $smushed_images, 'nextgen', 300 );

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}

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if ( ! empty( $unsmushed_images ) ) {

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wp_cache_set( 'wp_smush_images_unsmushed', $unsmushed_images, 'nextgen', 300 );

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}

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}

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if ( 'smushed' === $type ) {

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$smushed_images = ! empty( $smushed_images ) ? $smushed_images : $images;

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if ( ! $smushed_images ) {

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return 0;

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}

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return $count ? count( $smushed_images ) : $smushed_images;

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}

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$unsmushed_images = ! empty( $unsmushed_images ) ? $unsmushed_images : $images;

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if ( ! $unsmushed_images ) {

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return 0;

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}

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return $count ? count( $unsmushed_images ) : $unsmushed_images;

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}

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/**

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* Updated the global smush stats for NextGen gallery

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*

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* @param int $image_id Image ID.

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* @param array $stats Compression stats fo respective image.

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*/

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public function update_stats( $image_id, $stats ) {

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$stats = ! empty( $stats['stats'] ) ? $stats['stats'] : '';

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$smush_stats = $this->get_cache_smush_stats();

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if ( ! empty( $stats ) ) {

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// Human Readable.

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$smush_stats['human'] = ! empty( $smush_stats['bytes'] ) ? size_format( $smush_stats['bytes'], 1 ) : '';

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// Size of images before the compression.

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$smush_stats['size_before'] = ! empty( $smush_stats['size_before'] ) ? ( $smush_stats['size_before'] + $stats['size_before'] ) : $stats['size_before'];

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// Size of image after compression.

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$smush_stats['size_after'] = ! empty( $smush_stats['size_after'] ) ? ( $smush_stats['size_after'] + $stats['size_after'] ) : $stats['size_after'];

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$smush_stats['bytes'] = ! empty( $smush_stats['size_before'] ) && ! empty( $smush_stats['size_after'] ) ? ( $smush_stats['size_before'] - $smush_stats['size_after'] ) : 0;

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// Compression Percentage.

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$smush_stats['percent'] = ! empty( $smush_stats['size_before'] ) && ! empty( $smush_stats['size_after'] ) && $smush_stats['size_before'] > 0 ? ( $smush_stats['bytes'] / $smush_stats['size_before'] ) * 100 : $stats['percent'];

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}

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update_option( self::SMUSH_STATS_OPTION_ID, $smush_stats, false );

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$this->clear_cache();

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}

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/**

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* Clears the object cache for NextGen stats.

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*

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* @since 3.7.0

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*/

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public function clear_cache() {

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wp_cache_delete( 'wp_smush_images_smushed', 'nextgen' );

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wp_cache_delete( 'wp_smush_images_unsmushed', 'nextgen' );

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wp_cache_delete( 'wp_smush_images', 'nextgen' );

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}

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/**

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* Get the attachment stats for a image

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*

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* @param object|array|int $id Attachment ID.

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*

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* @return array

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*/

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private function get_attachment_stats( $image ) {

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// We'll get the image object in $image itself, else fetch it using Gallery Storage.

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if ( is_numeric( $image ) ) {

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// Registry Object for NextGen Gallery.

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$registry = C_Component_Registry::get_instance();

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// Gallery Storage Object.

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$storage = $registry->get_utility( 'I_Gallery_Storage' );

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// get an image object.

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$image = $storage->object->_image_mapper->find( $image );

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}

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$smush_savings = $this->get_image_smush_savings( $image );

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$resize_savings = $this->get_image_resize_savings( $image );

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return $this->recalculate_stats( 'add', $smush_savings, $resize_savings );

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}

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/**

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* Get the Nextgen Smush stats

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*

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* @return bool|mixed|void

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*/

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public function get_smush_stats() {

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$smushed_stats = array(

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'bytes' => 0,

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'size_before' => 0,

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'size_after' => 0,

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'percent' => 0,

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);

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// Clear up the stats.

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if ( 0 == $this->total_count() || $this->get_smushed_count() < 1 ) {

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delete_option( self::SMUSH_STATS_OPTION_ID );

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}

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// Check for the wp_smush_images in the 'nextgen' group.

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$stats = $this->get_cache_smush_stats();

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$size_before = (int) $this->get_array_value( $stats, 'size_before' );

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if ( empty( $size_before ) ) {

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return $smushed_stats;

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}

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$size_after = (int) $this->get_array_value( $stats, 'size_after' );

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$stats['bytes'] = $size_before - $size_after;

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$stats['bytes'] = $stats['bytes'] > 0 ? $stats['bytes'] : 0;

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$stats['percent'] = ( $stats['bytes'] / $stats['size_before'] ) * 100;

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// Round off precentage.

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$stats['percent'] = ! empty( $stats['percent'] ) ? round( $stats['percent'], 1 ) : 0;

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$stats['human'] = size_format( $stats['bytes'], $stats['bytes'] >= 1024 ? 1 : 0 );

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$smushed_stats = array_merge( $smushed_stats, $stats );

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// Gotta remove the stats for re-smush ids.

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if ( $this->get_reoptimize_list()->get_count() ) {

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$resmush_stats = $this->get_stats_for_ids( $this->get_reoptimize_list()->get_ids() );

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// Recalculate stats, Remove stats for resmush ids.

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$smushed_stats = $this->recalculate_stats( 'sub', $smushed_stats, $resmush_stats );

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}

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return $smushed_stats;

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}

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/**

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* Get the combined stats for given Ids

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*

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* @param array $ids Image IDs.

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*

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* @return array|bool Array of Stats for the given ids

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*/

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public function get_stats_for_ids( $ids = array() ) {

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// Return if we don't have an array or no ids.

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if ( ! is_array( $ids ) || empty( $ids ) ) {

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return false;

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}

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// Initialize the Stats array.

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$stats = array(

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'size_before' => 0,

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'size_after' => 0,

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);

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// Calculate the stats, Expensive Operation.

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foreach ( $ids as $id ) {

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$image_stats = $this->get_attachment_stats( $id );

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$stats = $this->recalculate_stats( 'add', $stats, $image_stats );

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}

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return $stats;

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}

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/**

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* Add/Subtract the values from 2nd array to First array

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* This function is very specific to current requirement of stats re-calculation

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*

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* @param string $op 'add', 'sub' Add or Subtract the values.

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* @param array $a1 First array.

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* @param array $a2 Second array.

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*

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* @return array Return $a1

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*/

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private function recalculate_stats( $op = 'add', $a1 = array(), $a2 = array() ) {

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// If the first array itself is not set, return.

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if ( empty( $a1 ) ) {

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return $a1;

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}

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// Iterate over keys in first array, and add/subtract the values.

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foreach ( $a1 as $k => $v ) {

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// If the key is not set in 2nd array, skip.

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if ( empty( $a2[ $k ] ) || ! in_array( $k, array( 'size_before', 'size_after' ) ) ) {

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continue;

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}

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// Else perform the operation, Considers the value to be integer, doesn't performs a check.

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if ( 'sub' === $op ) {

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// Subtract the value.

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$a1[ $k ] -= $a2[ $k ];

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} elseif ( 'add' === $op ) {

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// Add the value.

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$a1[ $k ] += $a2[ $k ];

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}

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}

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// Recalculate percentage and human savings.

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$a1['bytes'] = $a1['size_before'] - $a1['size_after'];

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$a1['percent'] = $a1['bytes'] > 0 ? round( ( $a1['bytes'] / $a1['size_before'] ) * 100, 1 ) : 0;

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$a1['human'] = $a1['bytes'] > 0 ? size_format( $a1['bytes'], 1 ) : 0;

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return $a1;

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}

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/**

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* Get Super smushed images from the given images array

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*

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* @param array $images Array of images containing metadata.

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*

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* @return array Array containing ids of supersmushed images

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*/

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private function get_super_smushed_images( $images = array() ) {

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if ( empty( $images ) ) {

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return array();

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}

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$super_smushed = array();

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// Iterate Over all the images.

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foreach ( $images as $image_k => $image ) {

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if ( empty( $image ) || ! is_array( $image ) || ! isset( $image['wp_smush'] ) ) {

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continue;

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}

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// Check for lossy compression.

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if ( ! empty( $image['wp_smush']['stats'] ) && ! empty( $image['wp_smush']['stats']['lossy'] ) ) {

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$super_smushed[] = $image_k;

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}

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}

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return $super_smushed;

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}

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/**

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* Recalculate stats for the given smushed ids and update the cache

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* Update Super smushed image ids

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*

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* @throws Exception Exception.

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*/

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public function update_stats_cache() {

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// Get the Image ids.

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$smushed_images = $this->get_ngg_images( 'smushed' );

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$super_smushed = array(

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'ids' => array(),

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'timestamp' => '',

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);

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$stats = $this->get_stats_for_ids( $smushed_images );

[434] Fix | Delete

$lossy = $this->get_super_smushed_images( $smushed_images );

[435] Fix | Delete

[436] Fix | Delete

if ( empty( $stats['bytes'] ) && ! empty( $stats['size_before'] ) ) {

[437] Fix | Delete

$stats['bytes'] = $stats['size_before'] - $stats['size_after'];

[438] Fix | Delete

}

[439] Fix | Delete

$stats['human'] = size_format( ! empty( $stats['bytes'] ) ? $stats['bytes'] : 0 );

[440] Fix | Delete

if ( ! empty( $stats['size_before'] ) ) {

[441] Fix | Delete

$stats['percent'] = ( $stats['bytes'] / $stats['size_before'] ) * 100;

[442] Fix | Delete

$stats['percent'] = round( $stats['percent'], 2 );

[443] Fix | Delete

}

[444] Fix | Delete

[445] Fix | Delete

// Update Re-smush list.

[446] Fix | Delete

if ( is_array( WP_Smush::get_instance()->core()->nextgen->ng_admin->resmush_ids ) && is_array( $smushed_images ) ) {

[447] Fix | Delete

$resmush_ids = array_intersect( WP_Smush::get_instance()->core()->nextgen->ng_admin->resmush_ids, array_keys( $smushed_images ) );

[448] Fix | Delete

}

[449] Fix | Delete

[450] Fix | Delete

// If we have resmush ids, add it to db.

[451] Fix | Delete

if ( ! empty( $resmush_ids ) ) {

[452] Fix | Delete

// Update re-smush images to db.

[453] Fix | Delete

$this->get_reoptimize_list()->update_ids( $resmush_ids );

[454] Fix | Delete

}

[455] Fix | Delete

[456] Fix | Delete

// Update Super smushed images in db.

[457] Fix | Delete

$this->get_supper_smushed_list()->update_ids( $lossy );

[458] Fix | Delete

[459] Fix | Delete

// Update Stats Cache.

[460] Fix | Delete

update_option( self::SMUSH_STATS_OPTION_ID, $stats, false );

[461] Fix | Delete

[462] Fix | Delete

}

[463] Fix | Delete

[464] Fix | Delete

public function get_reoptimize_list() {

[465] Fix | Delete

return $this->reoptimize_list;

[466] Fix | Delete

}

[467] Fix | Delete

[468] Fix | Delete

public function get_supper_smushed_list() {

[469] Fix | Delete

return $this->supper_smushed_list;

[470] Fix | Delete

}

[471] Fix | Delete

[472] Fix | Delete

public function get_supper_smushed_count() {

[473] Fix | Delete

return count( $this->get_supper_smushed() );

[474] Fix | Delete

}

[475] Fix | Delete

[476] Fix | Delete

private function get_supper_smushed() {

[477] Fix | Delete

$super_smushed = $this->get_supper_smushed_list()->get_ids();

[478] Fix | Delete

[479] Fix | Delete

// If we have images to be resmushed, Update supersmush list.

[480] Fix | Delete

$resmush_ids = $this->get_reoptimize_list()->get_ids();

[481] Fix | Delete

if ( ! empty( $resmush_ids ) && ! empty( $super_smushed ) ) {

[482] Fix | Delete

$super_smushed = array_diff( $super_smushed, $resmush_ids );

[483] Fix | Delete

}

[484] Fix | Delete

[485] Fix | Delete

// If supersmushed images are more than total, clean it up.

[486] Fix | Delete

if ( count( $super_smushed ) > self::total_count() ) {

[487] Fix | Delete

$super_smushed = $this->cleanup_super_smush_data();

[488] Fix | Delete

}

[489] Fix | Delete

[490] Fix | Delete

return (array) $super_smushed;

[491] Fix | Delete

}

[492] Fix | Delete

[493] Fix | Delete

/**

[494] Fix | Delete

* Cleanup Super-smush images array against the all ids in gallery

[495] Fix | Delete

*

[496] Fix | Delete

* @return array|mixed|void

[497] Fix | Delete

*/

[498] Fix | Delete

private function cleanup_super_smush_data() {

[499] Fix | Delete