<?php
/**
 * Export cleanup.
 *
 * @package Recast\WCS
 */

namespace Recast\WCS\Export;

defined( 'ABSPATH' ) || exit;

/**
 * Removes expired exports and keeps at most 20 per user. Runs on recast_cleanup.
 */
final class Cleanup {

	const CAP_PER_USER = 20;

	/**
	 * Registers the handler.
	 *
	 * @return void
	 */
	public static function register() {
		add_action(
			'recast_cleanup',
			static function () {
				self::run();
			}
		);
	}

	/**
	 * One pass.
	 *
	 * @return int Rows removed.
	 */
	public static function run() {
		$repo    = new ExportRepository();
		$removed = 0;
		foreach ( $repo->purgeable( self::CAP_PER_USER ) as $export ) {
			Storage::delete( $export['file_name'] );
			$repo->delete( $export['id'] );
			++$removed;
		}
		return $removed;
	}
}