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<?php

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/**

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* Smush core class: Smush class

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* @package Smush\Core\Modules

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namespace Smush\Core\Modules;

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use Smush\Core\Api\Backoff;

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use Smush\Core\Api\Request_Multiple;

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use Smush\Core\Core;

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use Smush\Core\Helper;

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use Smush\Core\Error_Handler;

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use Smush\Core\Media\Media_Item_Cache;

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use Smush\Core\Media\Media_Item_Optimizer;

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use Smush\Core\Smush\Smusher;

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use Smush\Core\Smush\Smush_Optimization;

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use Smush\Core\Webp\Webp_Converter;

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use Smush\Core\Webp\Webp_Optimization;

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use WP_Error;

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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 Smush

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class Smush extends Abstract_Module {

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const ERROR_SSL_CERT = 'ssl_cert_error';

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/**

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* Meta key to save smush result to db.

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* @var string $smushed_meta_key

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public static $smushed_meta_key = 'wp-smpro-smush-data';

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/**

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* Images dimensions array.

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* @var array $image_sizes

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public $image_sizes = array();

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/**

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* Stores the headers returned by the latest API call.

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* @var array $api_headers

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protected $api_headers = array();

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/**

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* Prevent third party try to run another smush while it's running.

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* @access private

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* @var bool

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private $prevent_infinite_loop;

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/**

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* @var Request_Multiple

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private $request_multiple;

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/**

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* @var Backoff

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private $backoff;

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/**

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* WP_Smush constructor.

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public function init() {

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// Update the Super Smush count, after the Smush'ing.

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//add_action( 'wp_smush_image_optimised', array( $this, 'update_lists' ), '', 2 );

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// Smush image (Auto Smush) when `wp_generate_attachment_metadata` filter is fired.

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add_filter( 'wp_generate_attachment_metadata', array( $this, 'smush_image' ), 15, 2 );

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// Delete backup files.

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//add_action( 'delete_attachment', array( $this, 'delete_images' ), 12 );

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// Handle the Async optimisation.

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add_action( 'wp_async_wp_generate_attachment_metadata', array( $this, 'wp_smush_handle_async' ) );

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add_action( 'wp_async_wp_save_image_editor_file', array( $this, 'wp_smush_handle_editor_async' ), '', 2 );

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// Make sure we treat scaled images as additional size.

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//add_filter( 'wp_smush_add_scaled_images_to_meta', array( $this, 'add_scaled_to_meta' ), 10, 2 );

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// Fix SSL CA certificates issue.

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add_action( 'wp_smush_before_smush_file', array( $this, 'fix_ssl_ca_certificate_error' ) );

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$this->request_multiple = new Request_Multiple();

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$this->backoff = new Backoff();

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}

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/**

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* Check whether to show warning or not for Pro users, if they don't have a valid install

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* @return bool

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public function show_warning() {

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// If it's a free setup, Go back right away!

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if ( ! WP_Smush::is_pro() ) {

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return false;

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}

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// Return. If we don't have any headers.

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if ( ! isset( $this->api_headers ) ) {

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return false;

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}

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// Show warning, if function says it's premium and api says not premium.

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if ( isset( $this->api_headers['is_premium'] ) && ! (int) $this->api_headers['is_premium'] ) {

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return true;

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}

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return false;

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}

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/**

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* Add/Remove image id from Super Smushed images count.

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* @param int $id Image id.

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* @param string $op_type Add/remove, whether to add the image id or remove it from the list.

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* @param string $key Options key.

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* @return bool Whether the Super Smushed option was update or not

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public function update_super_smush_count( $id, $op_type = 'add', $key = 'wp-smush-super_smushed' ) {

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// Get the existing count.

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$super_smushed = get_option( $key, false );

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// Initialize if it doesn't exists.

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if ( ! $super_smushed || empty( $super_smushed['ids'] ) ) {

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$super_smushed = array(

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'ids' => array(),

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);

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}

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// Insert the id, if not in there already.

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if ( 'add' === $op_type && ! in_array( $id, $super_smushed['ids'] ) ) {

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$super_smushed['ids'][] = $id;

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} elseif ( 'remove' === $op_type && false !== ( $k = array_search( $id, $super_smushed['ids'] ) ) ) {

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// Else remove the id from the list.

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unset( $super_smushed['ids'][ $k ] );

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// Reset all the indexes.

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$super_smushed['ids'] = array_values( $super_smushed['ids'] );

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}

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// Add the timestamp.

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$super_smushed['timestamp'] = time();

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update_option( $key, $super_smushed, false );

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// Update to database.

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return true;

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}

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/**

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* Checks if the image compression is lossy, stores the image id in options table

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* @param int $id Image Id.

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* @param array $stats Compression Stats.

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* @param string $key Meta Key for storing the Super Smushed ids (Optional for Media Library).

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* Need To be specified for NextGen.

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* @return bool

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public function update_lists( $id, $stats, $key = '' ) {

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// If Stats are empty or the image id is not provided, return.

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if ( empty( $stats ) || empty( $id ) || empty( $stats['stats'] ) ) {

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return false;

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}

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// Update Super Smush count.

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if ( isset( $stats['stats']['lossy'] ) && 1 == $stats['stats']['lossy'] ) {

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if ( empty( $key ) ) {

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update_post_meta( $id, 'wp-smush-lossy', 1 );

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} else {

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$this->update_super_smush_count( $id, 'add', $key );

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}

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}

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// Check and update re-smush list for media gallery.

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if ( ! empty( $this->resmush_ids ) && in_array( $id, $this->resmush_ids ) ) {

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$this->update_resmush_list( $id );

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}

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}

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/**

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* Remove the given attachment id from resmush list and updates it to db

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* @param string $attachment_id Attachment ID.

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* @param string $mkey Option key.

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public function update_resmush_list( $attachment_id, $mkey = 'wp-smush-resmush-list' ) {

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$resmush_list = get_option( $mkey );

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// If there are any items in the resmush list, Unset the Key.

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if ( ! empty( $resmush_list ) && count( $resmush_list ) > 0 ) {

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$key = array_search( $attachment_id, $resmush_list );

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if ( $resmush_list ) {

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unset( $resmush_list[ $key ] );

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}

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$resmush_list = array_values( $resmush_list );

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}

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// If Resmush List is empty.

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if ( empty( $resmush_list ) || 0 === count( $resmush_list ) ) {

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// Delete resmush list.

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delete_option( $mkey );

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} else {

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update_option( $mkey, $resmush_list, false );

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}

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}

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/**

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* Remove the Update info.

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* @param bool $remove_notice Remove notice.

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public function dismiss_update_info( $remove_notice = false ) {

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// From URL arg.

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if ( isset( $_GET['dismiss_smush_update_info'] ) && 1 == $_GET['dismiss_smush_update_info'] ) {

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$remove_notice = true;

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}

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// From Ajax.

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if ( ! empty( $_REQUEST['action'] ) && 'dismiss_update_info' === $_REQUEST['action'] ) {

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$remove_notice = true;

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}

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// Update Db.

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if ( $remove_notice ) {

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update_site_option( 'wp-smush-hide_update_info', 1 );

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}

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}

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/**

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* Check whether to skip a specific image size or not.

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* @param string $size Registered image size.

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* @return bool Skip the image size or not.

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public function skip_image_size( $size ) {

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// No image size specified, Don't skip.

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if ( empty( $size ) ) {

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return false;

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}

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$image_sizes = $this->settings->get_setting( 'wp-smush-image_sizes' );

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// If image sizes aren't set, don't skip any of the image size.

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if ( false === $image_sizes ) {

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return false;

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}

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// Check if the size is in the smush list.

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return is_array( $image_sizes ) && ! in_array( $size, $image_sizes, true );

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}

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private function validate_file( $file_path ) {

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$errors = new WP_Error();

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$dir_name = trailingslashit( dirname( $file_path ) );

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// Check if file exists and the directory is writable.

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if ( empty( $file_path ) ) {

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$errors->add( 'empty_path', Error_Handler::get_error_message( 'empty_path' ) );

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} elseif ( ! file_exists( $file_path ) || ! is_file( $file_path ) ) {

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// Check that the file exists.

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/* translators: %s: file path */

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$errors->add( 'file_not_found', sprintf( Error_Handler::get_error_message( 'file_not_found' ), basename( $file_path ) ) );

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} elseif ( ! is_writable( $dir_name ) ) {

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// Check that the file is writable.

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/* translators: %s: directory name */

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$errors->add( 'not_writable', sprintf( Error_Handler::get_error_message( 'not_writable' ), $dir_name ) );

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}

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$file_size = file_exists( $file_path ) ? filesize( $file_path ) : '';

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// Check if premium user.

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if ( WP_Smush::is_pro() ) {

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$max_size = WP_SMUSH_PREMIUM_MAX_BYTES;

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$size_limit_code = 'size_pro_limit';

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} else {

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$size_limit_code = 'size_limit';

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$max_size = WP_SMUSH_MAX_BYTES;

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}

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// Check if file exists.

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if ( 0 === (int) $file_size ) {

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$errors->add( 'file_not_found', sprintf( Error_Handler::get_error_message( 'file_not_found' ), basename( $file_path ) ) );

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} elseif ( $file_size > $max_size ) {

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// Check size limit.

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$errors->add( $size_limit_code, sprintf( Error_Handler::get_error_message( $size_limit_code ), size_format( $file_size, 1 ) ), array(

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'file_name' => basename( $file_path )

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) );

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}

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return $errors;

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}

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private function smush_parallel( $file_paths, $convert_to_webp = false ) {

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$file_errors = array();

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$retry = array();

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$requests = array();

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foreach ( $file_paths as $file_key => $file_path ) {

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$error = $this->validate_file( $file_path );

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if ( $error->has_errors() ) {

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$file_errors[ $file_key ] = $error;

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} else {

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$requests[ $file_key ] = $this->get_multi_api_request_args( $convert_to_webp, $file_path );

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}

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}

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// Send off the valid paths to the API

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$responses = array();

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$this->request_multiple->do_requests( $requests, array(

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'timeout' => WP_SMUSH_TIMEOUT,

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'connect_timeout' => 5,

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'user-agent' => WP_SMUSH_UA,

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'complete' => function ( $response, $response_key ) use ( &$requests, &$responses, &$retry, $file_paths, $convert_to_webp ) {

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// Free up memory

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$requests[ $response_key ] = null;

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$file_path = $file_paths[ $response_key ];

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if ( $this->should_retry_smush( $response ) ) {

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$retry[ $response_key ] = $file_path;

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} else {

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$responses[ $response_key ] = $this->handle_response(

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$response,

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$file_path,

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$convert_to_webp

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);

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}

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) );

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// Retry failures with exponential backoff

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foreach ( $retry as $retry_key => $retry_file_path ) {

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$responses[ $retry_key ] = $this->do_smushit(

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$retry_file_path,

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$convert_to_webp,

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WP_SMUSH_RETRY_ATTEMPTS

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);

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}

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// Merge the responses

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return array_merge( $responses, $file_errors );

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}

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private function smush_sequential( $file_paths, $convert_to_webp = false ) {

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$responses = array();

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foreach ( $file_paths as $file_size => $file_path ) {

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$responses[ $file_size ] = $this->do_smushit( $file_path, $convert_to_webp, WP_SMUSH_RETRY_ATTEMPTS );

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}

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return $responses;

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}

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/**

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* @param $convert_to_webp

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* @param $file_path

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* @return array

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private function get_multi_api_request_args( $convert_to_webp, $file_path ) {

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return array(

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'url' => $this->get_api_url(),

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'headers' => $this->get_api_request_headers( $convert_to_webp ),

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'data' => file_get_contents( $file_path ),

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'type' => 'POST',

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);

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}

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/**

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* Process an image with Smush.

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* @since 3.8.0 Added new param $convert_to_webp.

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* @param string $file_path Absolute path to the image.

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* @param bool $convert_to_webp Convert the image to webp.

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* @param int $retries Number of times to retry the operation

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* @return array|bool|WP_Error

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public function do_smushit( $file_path = '', $convert_to_webp = false, $retries = 0 ) {

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// TODO: (stats refactor) handle properly

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return $this->do_smushit_optimization( $file_path, $convert_to_webp, $retries );

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$errors = $this->validate_file( $file_path );

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if ( count( $errors->get_error_messages() ) ) {

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Helper::logger()->error(

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array(

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sprintf( 'Skipped file [%s] due to error:', Helper::clean_file_path( $file_path ) ),

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$errors->get_error_messages(),

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)

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);

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return $errors;

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}

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// Optimize image, and fetch the response.

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$response = $this->backoff->set_wait( WP_SMUSH_RETRY_WAIT )

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->set_max_attempts( $retries )

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->enable_jitter()

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->set_decider( array( $this, 'should_retry_smush' ) )

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->run( function () use ( $file_path, $convert_to_webp ) {

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return $this->_post( $file_path, $convert_to_webp );

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} );

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return $this->handle_response( $response, $file_path, $convert_to_webp );

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}

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public function should_retry_smush( $response ) {

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return WP_SMUSH_RETRY_ATTEMPTS > 0 && (

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is_wp_error( $response )

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|| 200 !== wp_remote_retrieve_response_code( $response )

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);

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}

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/**

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* Takes the raw response from the API and performs all the necessary file operations etc.

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* @param $response array|WP_Error

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* @param $file_path string

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* @param $convert_to_webp boolean

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* @return array|WP_Error

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private function handle_response( $response, $file_path, $convert_to_webp ) {

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$data = $this->parse_response( $response );

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if ( is_wp_error( $data ) ) {

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if ( $data->get_error_code() === self::ERROR_SSL_CERT ) {

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// Switch to http protocol.

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$this->settings->set_setting( 'wp-smush-use_http', 1 );

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}

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$error_format = $convert_to_webp

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? 'Cannot convert to webp for image [%s].'

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: 'Cannot smush image [%s].';

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[447] Fix | Delete

Helper::logger()->error(

[448] Fix | Delete

array(

[449] Fix | Delete

sprintf( $error_format, Helper::clean_file_path( $file_path ) ),

[450] Fix | Delete

$data->get_error_messages(),

[451] Fix | Delete

)

[452] Fix | Delete

);

[453] Fix | Delete

[454] Fix | Delete

return $data;

[455] Fix | Delete

}

[456] Fix | Delete

[457] Fix | Delete

$bytes_saved = empty( $data->bytes_saved ) ? 0 : $data->bytes_saved;

[458] Fix | Delete

if ( $bytes_saved > 0 ) {

[459] Fix | Delete

$this->save_smushed_image_file(

[460] Fix | Delete

$file_path,

[461] Fix | Delete

$convert_to_webp,

[462] Fix | Delete

$data->image

[463] Fix | Delete

);

[464] Fix | Delete

} else {

[465] Fix | Delete

// No savings, just add an entry to the log

[466] Fix | Delete

Helper::logger()->notice(

[467] Fix | Delete

sprintf(

[468] Fix | Delete

'The smushed image is larger than the original image [%s] (bytes saved %d), keep original image.',

[469] Fix | Delete

Helper::clean_file_path( $file_path ),

[470] Fix | Delete

$bytes_saved

[471] Fix | Delete

)

[472] Fix | Delete

);

[473] Fix | Delete

}

[474] Fix | Delete

[475] Fix | Delete

// No need to pass image data any further

[476] Fix | Delete

$data->image = null;

[477] Fix | Delete

$data->image_md5 = null;

[478] Fix | Delete

[479] Fix | Delete

// Check for API message and store in db.

[480] Fix | Delete

if ( ! empty( $data->api_message ) ) {

[481] Fix | Delete

$this->add_api_message( (array) $data->api_message );

[482] Fix | Delete

}

[483] Fix | Delete

[484] Fix | Delete

// If is_premium is set in response, send it over to check for member validity.

[485] Fix | Delete

if ( ! empty( $data->is_premium ) ) {

[486] Fix | Delete

$this->api_headers['is_premium'] = $data->is_premium;

[487] Fix | Delete

}

[488] Fix | Delete

[489] Fix | Delete

return array(

[490] Fix | Delete

'success' => true,

[491] Fix | Delete

'data' => $data,

[492] Fix | Delete

);

[493] Fix | Delete

}

[494] Fix | Delete

[495] Fix | Delete

/**

[496] Fix | Delete

* Posts an image to Smush.

[497] Fix | Delete

[498] Fix | Delete

* @since 3.8.0 Added new param $convert_to_webp.

[499] Fix | Delete

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