459 lines
16 KiB
PHP
459 lines
16 KiB
PHP
<?php
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/**
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* Implements backup/restore functions.
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*
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* @link https://ewww.io
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* @package EIO
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*/
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namespace EWWW;
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* Backup & Restore images from both local and cloud locations.
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*/
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class Backup extends Base {
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/**
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* An error from a restore operation.
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*
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* @access protected
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* @var string $error_message
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*/
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protected $error_message = '';
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/**
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* A list of exclusions.
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*
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* @access protected
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* @var array $exclusions
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*/
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protected $exclusions = array();
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/**
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* Backup mode (local/cloud).
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*
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* @var string $backup_mode
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*/
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protected $backup_mode = '';
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/**
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* Backup location.
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*
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* @var string $backup_dir
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*/
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protected $backup_dir = '';
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/**
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* Backup location for media uploads.
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*
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* @var string $backup_uploads_dir
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*/
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protected $backup_uploads_dir = '';
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/**
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* Backup location for images outside the wp-content directory.
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*
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* @var string $backup_root_dir
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*/
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protected $backup_root_dir = '';
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/**
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* Register (once) actions and filters for Backup and Restore.
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*/
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public function __construct() {
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global $eio_backup;
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if ( \is_object( $eio_backup ) ) {
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return $eio_backup;
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}
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parent::__construct();
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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if ( 'local' === $this->get_option( 'ewww_image_optimizer_backup_files' ) ) {
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$this->backup_mode = 'local';
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// Sub-folders of the content directory will be stored directly in the image-backup/ folder.
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$this->backup_dir = \trailingslashit( $this->content_dir ) . \trailingslashit( 'image-backup' );
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// Sub-folders of the content directory will be stored directly in the image-backup/ folder.
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$this->backup_uploads_dir = \trailingslashit( $this->backup_dir ) . \trailingslashit( 'uploads' );
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// Folders outside the content dir, and relative to ABSPATH will be stored in the root/ directory.
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$this->backup_root_dir = \trailingslashit( $this->backup_dir ) . \trailingslashit( 'root' );
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} elseif ( $this->get_option( 'ewww_image_optimizer_cloud_key' ) && $this->get_option( 'ewww_image_optimizer_backup_files' ) ) {
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$this->backup_mode = 'cloud';
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}
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// AJAX action hook for manually restoring a single image from cloud/local backups.
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\add_action( 'wp_ajax_ewww_manual_image_restore_single', array( $this, 'restore_single_image_handler' ) );
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\add_action( 'ewww_image_optimizer_pre_optimization', array( $this, 'store_local_backup' ) );
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$this->exclusions = array(
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$this->content_dir,
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'/wp-admin/',
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'/wp-includes/',
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'/cache/',
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'/dynamic/', // Nextgen dynamic images.
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);
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$this->exclusions = \apply_filters( 'ewww_image_optimizer_backup_exclusions', $this->exclusions );
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}
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/**
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* Gets the error message from the most recent restore operation, if any.
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*
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* @return string An error message.
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*/
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public function get_error() {
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return (string) $this->error_message;
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}
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/**
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* Sets the error message for restore operations.
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*
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* @param string $error An error message.
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*/
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public function throw_error( $error ) {
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if ( \is_string( $error ) ) {
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$this->error_message = \sanitize_text_field( $error );
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}
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}
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/**
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* Checks whether a file is in the uploads dir, content dir, or within the ABSPATH/root.
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*
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* This helps to deal with cases where folks have upload and/or content dirs outside ABSPATH.
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*
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* @param string $file The filename to backup.
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* @return string The backup location for the file.
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*/
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public function get_backup_location( $file ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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if ( \ewww_image_optimizer_stream_wrapped( $file ) || 'local' !== $this->backup_mode ) {
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return '';
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}
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$upload_dir = \wp_get_upload_dir();
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$upload_dir = \trailingslashit( \realpath( $upload_dir['basedir'] ) );
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if ( $upload_dir && \strpos( $file, $upload_dir ) === 0 ) {
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$this->debug_message( 'using ' . $this->backup_uploads_dir );
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return \str_replace( $upload_dir, $this->backup_uploads_dir, $file );
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}
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$content_dir = \trailingslashit( \realpath( WP_CONTENT_DIR ) );
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if ( $content_dir && \strpos( $file, $content_dir ) === 0 ) {
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$this->debug_message( 'using ' . $this->backup_dir );
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return \str_replace( $content_dir, $this->backup_dir, $file );
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}
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$wp_dir = \trailingslashit( \realpath( ABSPATH ) );
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if ( $wp_dir && \strpos( $file, $wp_dir ) === 0 ) {
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$this->debug_message( 'using ' . $this->backup_root_dir );
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return \str_replace( $wp_dir, $this->backup_root_dir, $file );
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}
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return '';
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}
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/**
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* Checks to see if a backup is available for a given file.
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*
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* @param string $file The image file to search for a backup.
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* @param array $record The database record for the file. Optional.
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* @return bool True if a backup is available, false otherwise.
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*/
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public function is_backup_available( $file, $record = false ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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$file = \ewww_image_optimizer_absolutize_path( $file );
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if ( 'local' === $this->backup_mode ) {
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\clearstatcache();
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$backup_file = $this->get_backup_location( $file );
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return $this->is_file( $backup_file );
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} elseif ( 'cloud' === $this->backup_mode ) {
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if ( ! $record || ! isset( $record['backup'] ) || ! isset( $record['updated'] ) ) {
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$record = \ewww_image_optimizer_find_already_optimized( $file );
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}
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if ( $record && $this->is_iterable( $record ) && ! empty( $record['backup'] ) && ! empty( $record['updated'] ) ) {
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$updated_time = \strtotime( $record['updated'] );
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if ( DAY_IN_SECONDS * 30 + $updated_time > \time() ) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Backup a file to local or cloud storage.
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*
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* @param string $file Name of the file to backup.
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*/
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public function backup_file( $file ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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$this->debug_message( "file: $file " );
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foreach ( $this->exclusions as $exclusion ) {
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if ( false !== \strpos( $file, $exclusion ) ) {
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return;
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}
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}
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if ( 'local' === $this->backup_mode ) {
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$this->store_local_backup( $file );
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} elseif ( 'cloud' === $this->backup_mode ) {
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$this->store_cloud_backup( $file );
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}
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}
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/**
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* Copy a file to the backup location.
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*
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* @param string $file Name of the file to backup.
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*/
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public function store_local_backup( $file ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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if ( 'local' !== $this->backup_mode ) {
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return;
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}
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if ( ! $this->is_file( $file ) || ! $this->is_readable( $file ) ) {
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return;
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}
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if ( apply_filters( 'ewww_image_optimizer_skip_local_backup', false, $file ) ) {
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return;
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}
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$backup_file = $this->get_backup_location( $file );
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if ( ! $backup_file || $backup_file === $file ) {
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return;
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}
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\clearstatcache();
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if ( $this->is_file( $backup_file ) ) {
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return;
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}
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\wp_mkdir_p( \dirname( $backup_file ) );
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\clearstatcache();
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if ( ! \is_writable( \dirname( $backup_file ) ) ) {
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return;
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}
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$this->debug_message( "backing up $file to $backup_file" );
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\copy( $file, $backup_file );
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if ( $this->filesize( $file ) !== $this->filesize( $backup_file ) ) {
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// In order to not store bogus files.
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$this->delete_file( $backup_file );
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}
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}
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/**
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* Send a file to the API for backup.
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*
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* @param string $file Name of the file to backup.
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*/
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protected function store_cloud_backup( $file ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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\ewww_image_optimizer_cloud_backup( $file );
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}
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/**
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* Restore an image from local or cloud storage.
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*
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* @global object $wpdb
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* @global object $ewwwdb A clone of $wpdb unless it is lacking utf8 connectivity.
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*
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* @param int|array $image The db record/ID of the image to restore.
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* @return bool True if the image was restored successfully.
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*/
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public function restore_file( $image ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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global $wpdb;
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if ( \strpos( $wpdb->charset, 'utf8' ) === false ) {
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\ewww_image_optimizer_db_init();
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global $ewwwdb;
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} else {
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$ewwwdb = $wpdb;
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}
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$this->error_message = '';
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if ( ! \is_array( $image ) && ! empty( $image ) && \is_numeric( $image ) ) {
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$image = $ewwwdb->get_row( "SELECT id,path,backup FROM $ewwwdb->ewwwio_images WHERE id = $image", ARRAY_A );
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}
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if ( ! empty( $image['path'] ) ) {
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$image['path'] = \ewww_image_optimizer_absolutize_path( $image['path'] );
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}
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if ( empty( $image['path'] ) ) {
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return false;
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}
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if ( 'local' === $this->backup_mode ) {
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return $this->restore_from_local( $image );
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} elseif ( 'cloud' === $this->backup_mode ) {
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return $this->restore_from_cloud( $image );
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}
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return false;
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}
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/**
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* Restore a file from a local backup location.
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*
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* @param array $image The db record of the image to restore.
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*/
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protected function restore_from_local( $image ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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if ( 'local' !== $this->backup_mode ) {
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return false;
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}
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$file = $image['path'];
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if ( ! \is_writable( \dirname( $file ) ) ) {
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$this->debug_message( "$file (or the parent dir) is not writable" );
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/* translators: %s: An image filename */
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$this->error_message = \sprintf( \__( '%s is not writable.', 'ewww-image-optimizer' ), $file );
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return false;
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}
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$backup_file = $this->get_backup_location( $file );
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if ( ! $backup_file || $backup_file === $file ) {
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$this->debug_message( "$backup_file is not a valid backup location for $file" );
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/* translators: %s: An image filename */
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$this->error_message = \sprintf( \__( 'Could not determine backup location for %s.', 'ewww-image-optimizer' ), $file );
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return false;
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}
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\clearstatcache();
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if ( ! $this->is_file( $backup_file ) ) {
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$this->debug_message( "$backup_file does not exist" );
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/* translators: %s: An image filename */
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$this->error_message = \sprintf( \__( 'No backup available for %s.', 'ewww-image-optimizer' ), $file );
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return false;
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}
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if ( \ewww_image_optimizer_mimetype( $file, 'i' ) !== \ewww_image_optimizer_mimetype( $backup_file, 'i' ) ) {
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$this->debug_message( "$backup_file is different type than $file " . \ewww_image_optimizer_mimetype( $backup_file, 'i' ) . ' vs. ' . \ewww_image_optimizer_mimetype( $file, 'i' ) );
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/* translators: %s: An image filename */
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$this->error_message = \sprintf( \__( 'Backup file for %s has the wrong mime type.', 'ewww-image-optimizer' ), $file );
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return false;
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}
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$filesize = $this->filesize( $file );
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$backsize = $this->filesize( $backup_file );
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if ( $filesize && $filesize === $backsize ) {
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// $this->delete_file( $backup_file );
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// return true; // Because restore not needed, already done!
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}
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$this->debug_message( "restoring $file from $backup_file" );
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copy( $backup_file, $file );
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if ( $this->filesize( $file ) === $this->filesize( $backup_file ) ) {
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if ( $this->is_file( $file . '.webp' ) && \is_writable( $file . '.webp' ) ) {
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$this->delete_file( $file . '.webp' );
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}
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/* $this->delete_file( $backup_file ); */
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global $wpdb;
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// Reset the image record.
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$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->ewwwio_images SET results = '', image_size = 0, updates = 0, updated=updated, level = 0 WHERE id = %d", $image['id'] ) );
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return true;
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}
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/* translators: %s: An image filename */
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$this->error_message = \sprintf( \__( 'Restore attempted for %s, but could not be confirmed.', 'ewww-image-optimizer' ), $file );
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return false;
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}
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/**
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* Send a file to the API for backup.
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*
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* @param int|array $image The db record/ID of the image to restore.
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* @return bool True if the image was restored successfully.
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*/
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protected function restore_from_cloud( $image ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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return \ewww_image_optimizer_cloud_restore_single_image( $image );
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}
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/**
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* Delete the local backup file. Used when deleting an attachment.
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*
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* @param array $file The filename of the image for which we should remove the backup.
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*/
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public function delete_local_backup( $file ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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if ( ! $file ) {
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return;
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}
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if ( 'local' !== $this->backup_mode ) {
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return;
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}
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$backup_file = $this->get_backup_location( $file );
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if ( ! $backup_file || $backup_file === $file ) {
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return;
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}
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\clearstatcache();
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if ( ! $this->is_file( $backup_file ) || ! \is_writable( $backup_file ) ) {
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return;
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}
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$this->delete_file( $backup_file );
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}
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/**
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* Restore an attachment from the API or local backups.
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*
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* @global object $wpdb
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* @global object $ewwwdb A clone of $wpdb unless it is lacking utf8 connectivity.
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*
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* @param int $id The attachment id number.
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* @param string $gallery Optional. The gallery from whence we came. Default 'media'.
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* @param array $meta Optional. The image metadata from the postmeta table.
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* @return array The altered meta (if size differs), or the original value passed along.
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*/
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public function restore_backup_from_meta_data( $id, $gallery = 'media', $meta = array() ) {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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global $wpdb;
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if ( \strpos( $wpdb->charset, 'utf8' ) === false ) {
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\ewww_image_optimizer_db_init();
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global $ewwwdb;
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} else {
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$ewwwdb = $wpdb;
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}
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$images = $ewwwdb->get_results( "SELECT id,path,resize,backup FROM $ewwwdb->ewwwio_images WHERE attachment_id = $id AND gallery = '$gallery'", ARRAY_A );
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foreach ( $images as $image ) {
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if ( ! empty( $image['path'] ) ) {
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$image['path'] = \ewww_image_optimizer_absolutize_path( $image['path'] );
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}
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$this->restore_file( $image );
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if ( 'media' === $gallery && 'full' === $image['resize'] && ! empty( $meta['width'] ) && ! empty( $meta['height'] ) ) {
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list( $width, $height ) = \wp_getimagesize( $image['path'] );
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if ( (int) $width !== (int) $meta['width'] || (int) $height !== (int) $meta['height'] ) {
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$meta['height'] = $height;
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$meta['width'] = $width;
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}
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}
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}
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if ( 'media' === $gallery ) {
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\remove_filter( 'wp_update_attachment_metadata', 'ewww_image_optimizer_update_filesize_metadata', 9 );
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$meta = \ewww_image_optimizer_update_filesize_metadata( $meta, $id );
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}
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if ( $this->s3_uploads_enabled() ) {
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\ewww_image_optimizer_remote_push( $meta, $id );
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$this->debug_message( 're-uploading to S3(_Uploads)' );
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}
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return $meta;
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}
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/**
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* Handle the AJAX call for a single image restore.
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*/
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public function restore_single_image_handler() {
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$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
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// Check permissions of current user.
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$permissions = \apply_filters( 'ewww_image_optimizer_manual_permissions', '' );
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if ( ! \current_user_can( $permissions ) ) {
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// Display error message if insufficient permissions.
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$this->ob_clean();
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\wp_die( \wp_json_encode( array( 'error' => \esc_html__( 'You do not have permission to optimize images.', 'ewww-image-optimizer' ) ) ) );
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}
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// Make sure we didn't accidentally get to this page without an attachment to work on.
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if ( empty( $_REQUEST['ewww_image_id'] ) ) {
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// Display an error message since we don't have anything to work on.
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$this->ob_clean();
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\wp_die( \wp_json_encode( array( 'error' => \esc_html__( 'No image ID was provided.', 'ewww-image-optimizer' ) ) ) );
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}
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if ( empty( $_REQUEST['ewww_wpnonce'] ) || ! \wp_verify_nonce( \sanitize_key( $_REQUEST['ewww_wpnonce'] ), 'ewww-image-optimizer-tools' ) ) {
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$this->ob_clean();
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\wp_die( \wp_json_encode( array( 'error' => \esc_html__( 'Access token has expired, please reload the page.', 'ewww-image-optimizer' ) ) ) );
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}
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\session_write_close();
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$image = (int) $_REQUEST['ewww_image_id'];
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$this->debug_message( "attempting restore for $image" );
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|
if ( $this->restore_file( $image ) ) {
|
|
$this->ob_clean();
|
|
\wp_die( \wp_json_encode( array( 'success' => 1 ) ) );
|
|
}
|
|
$this->ob_clean();
|
|
\wp_die( \wp_json_encode( array( 'error' => \esc_html__( 'Unable to restore image.', 'ewww-image-optimizer' ) ) ) );
|
|
}
|
|
}
|
|
|
|
global $eio_backup;
|
|
$eio_backup = new Backup();
|