<?php /** * Class for Background optimization of individual images, used by scheduled optimization. * * @link https://ewww.io * @package EWWW_Image_Optimizer */ namespace EWWW; if ( ! defined( 'ABSPATH' ) ) { exit; } /** * Processes a single image in background/async mode. * * @see EWWW\Background_Process */ class Background_Process_Image extends Background_Process { /** * The action name used to trigger this class extension. * * @access protected * @var string $action */ protected $action = 'ewwwio_image_optimize'; /** * The queue name for this class extension. * * @access protected * @var string $action */ protected $active_queue = 'single-async'; /** * Attempts limit, shorter for scheduled opt. * * @var int * @access protected */ protected $max_attempts = 5; /** * Runs optimization for a file from the image queue. * * @access protected * * @param string $item The filename of the attachment. * @return bool False indicates completion. */ protected function task( $item ) { session_write_close(); $id = (int) $item['id']; ewwwio_debug_message( "background processing $id" ); $file_path = ewww_image_optimizer_find_file_by_id( $id ); if ( $file_path ) { $attachment = array( 'id' => $id, 'path' => $file_path, ); ewwwio_debug_message( "processing background optimization request for $file_path" ); ewww_image_optimizer_aux_images_loop( $attachment, true ); } else { ewwwio_debug_message( "could not find file to process background optimization request for $id" ); return false; } $delay = (int) ewww_image_optimizer_get_option( 'ewww_image_optimizer_delay' ); if ( $delay && ewww_image_optimizer_function_exists( 'sleep' ) ) { sleep( $delay ); } return false; } /** * Runs failure routine for an item from the queue. * * @access protected * * @param array $item The id of the attachment, how many attempts have been made to process * the item and whether it is a new upload. */ protected function failure( $item ) { if ( empty( $item['id'] ) ) { return; } global $wpdb; $file_path = ewww_image_optimizer_find_file_by_id( $item['id'] ); if ( $file_path ) { ewww_image_optimizer_add_file_exclusion( $file_path ); } $wpdb->query( $wpdb->prepare( "DELETE from $wpdb->ewwwio_images WHERE id=%d pending=1 AND (image_size IS NULL OR image_size = 0)", $item['id'] ) ); } }