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wp-content/plugins/ewww-image-optimizer/classes/class-background-process-media.php

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+<?php
+/**
+ * Class for Background processing of Media Library images.
+ *
+ * @link https://ewww.io
+ * @package EWWW_Image_Optimizer
+ */
+
+namespace EWWW;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Processes media uploads in background/async mode.
+ *
+ * Uses a db queue system to track uploads to be optimized, handling them one at a time.
+ *
+ * @see EWWW\Background_Process
+ */
+class Background_Process_Media extends Background_Process {
+
+	/**
+	 * The action name used to trigger this class extension.
+	 *
+	 * @access protected
+	 * @var string $action
+	 */
+	protected $action = 'ewwwio_media_optimize';
+
+	/**
+	 * The queue name for this class extension.
+	 *
+	 * @access protected
+	 * @var string $action
+	 */
+	protected $active_queue = 'media-async';
+
+	/**
+	 * Runs task for an item from the Media Library queue.
+	 *
+	 * Makes sure an image upload has finished processing and has been stored in the database.
+	 * Then runs the usual media optimization routine on the specified item.
+	 *
+	 * @access protected
+	 * @global bool $ewww_defer True to defer optimization, false otherwise.
+	 *
+	 * @param array $item The id of the attachment, how many attempts have been made to process
+	 *                    the item, the type of attachment, and whether it is a new upload.
+	 * @return bool|array If the item is not complete, return it. False indicates completion.
+	 */
+	protected function task( $item ) {
+		session_write_close();
+		global $ewww_defer;
+		$ewww_defer   = false;
+		$max_attempts = 15;
+		$id           = $item['id'];
+		if ( empty( $item['attempts'] ) ) {
+			ewwwio_debug_message( 'first attempt, going to sleep for a bit' );
+			$item['attempts'] = 0;
+			sleep( 1 ); // On the first attempt, hold off and wait for the db to catch up.
+		}
+		$type = get_post_mime_type( $id );
+		if ( empty( $type ) ) {
+			ewwwio_debug_message( "mime is missing, requeueing {$item['attempts']}" );
+			sleep( 4 );
+			return $item;
+		}
+		ewwwio_debug_message( "background processing $id, type: " . $type );
+		$image_types = array(
+			'image/jpeg',
+			'image/png',
+			'image/gif',
+		);
+
+		if ( in_array( $type, $image_types, true ) && $item['new'] && class_exists( 'wpCloud\StatelessMedia\EWWW' ) ) {
+			$meta = wp_get_attachment_metadata( $id );
+		} else {
+			// This is unfiltered for performance, because we don't often need filtered meta.
+			$meta = wp_get_attachment_metadata( $id, true );
+		}
+		if ( in_array( $type, $image_types, true ) && empty( $meta ) ) {
+			ewwwio_debug_message( "metadata is missing, requeueing {$item['attempts']}" );
+			sleep( 4 );
+			return $item;
+		}
+		$meta = ewww_image_optimizer_resize_from_meta_data( $meta, $id, true, $item['new'] );
+		if ( ! empty( $meta['processing'] ) ) {
+			ewwwio_debug_message( 'image not finished, try again' );
+			return $item;
+		}
+		if ( class_exists( 'wpCloud\StatelessMedia\EWWW' ) ) {
+			ewwwio_debug_message( 'async optimize complete, triggering wp_update_attachment_metadata filter with existing meta' );
+			$meta = apply_filters( 'wp_update_attachment_metadata', wp_get_attachment_metadata( $image->attachment_id ), $image->attachment_id );
+		} else {
+			ewwwio_debug_message( 'async optimize complete, running wp_update_attachment_metadata()' );
+			wp_update_attachment_metadata( $id, $meta );
+		}
+		return false;
+	}
+
+	/**
+	 * Runs failure routine for an item from the Media Library 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;
+		}
+		$file_path = false;
+		$meta      = wp_get_attachment_metadata( $item['id'] );
+		if ( ! empty( $meta ) ) {
+			list( $file_path, $upload_path ) = ewww_image_optimizer_attachment_path( $meta, $item['id'] );
+		}
+
+		if ( $file_path ) {
+			ewww_image_optimizer_add_file_exclusion( $file_path );
+		}
+	}
+}