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<?php
namespace ImageOptimizer\Classes\Image;
use ImageOptimizer\Classes\File_Utils;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
require_once ABSPATH . 'wp-admin/includes/file.php';
WP_Filesystem();
/**
* We're saving backup paths in meta even though the backup path could be dynamically generated.
* The next reasons affected this decision:
*
* 1. Possible path conflicts with other plugins and/or custom user logic. We can't guarantee that the image
* we find using the dynamically created path will be the same image we saved.
* 2. If a backup doesn't exist, but stored in our meta -- we can be almost sure it's not because of us.
* Probably, some other plugin removed it or even user manually did it, but it's not our fault. Makes this logic
* easier to debug.
* 3. We can change backup file name using `wp_unique_filename()` if needed and easily point a backup path to an
* image.
*/
class Image_Backup {
/**
* Creates a backup of a file by moving it to a new file with the backup extension.
* Also, attaches a newly created backup to image's meta.
*
* @param int $image_id Attachment id.
* @param string $image_size Image size (e.g. 'full', 'thumbnail', etc.).
* @param string $image_path Path to an image we plan to back up.
* @return string Backup path.
*/
public static function create( int $image_id, string $image_size, string $image_path ): string {
global $wp_filesystem;
$extension = File_Utils::get_extension( $image_path );
$backup_path = File_Utils::replace_extension( $image_path, "backup.$extension" );
$wp_filesystem->move( $image_path, $backup_path, true );
$meta = new Image_Meta( $image_id );
$meta->set_image_backup_path( $image_size, $backup_path );
$meta->save();
return $backup_path;
}
/**
* Looks for registered backups and remove all files found.
* Also, wipes removed files from image meta.
*
* @param int[] $image_ids Array of attachment ids.
* @return void
*/
public static function remove_many( array $image_ids ): void {
foreach ( $image_ids as $image_id ) {
self::remove( $image_id );
}
}
/**
* Removes one or all backups for a specific image.
* Also, wipes removed files from image meta.
*
* @param int $image_id Attachment id.
* @param string|null $image_size Image size (e.g. 'full', 'thumbnail', etc.). All backups will be removed if no size provided.
* @return bool Returns true if backups were removed successfully, false otherwise.
*/
public static function remove( int $image_id, ?string $image_size = null ): bool {
global $wp_filesystem;
$meta = new Image_Meta( $image_id );
$backups = $meta->get_image_backup_paths();
if ( empty( $backups ) ) {
return false;
}
if ( $image_size ) {
if ( ! key_exists( $image_size, $backups ) ) {
return false;
}
$wp_filesystem->delete( $backups[ $image_size ], false, 'f' );
$meta->remove_image_backup_path( $image_size );
$meta->save();
return true;
}
foreach ( $backups as $image_size => $backup_path ) {
$wp_filesystem->delete( $backup_path, false, 'f' );
$meta->remove_image_backup_path( $image_size );
}
$meta->save();
return true;
}
}