<?php
/**
 * Removes what the plugin stored outside dashboards.
 *
 * @package PulseCast
 */

namespace PulseCast;

use PulseCast\Feeds\Feed_Cache;
use PulseCast\Feeds\Feed_Lock;
use PulseCast\Feeds\Feed_Scheduler;

/**
 * Cleanup run from `uninstall.php`: cached feed content, the refresh lock, the version option
 * and scheduled events. Dashboards are user content and are kept. Whether to offer deleting
 * them is decided with the admin interface.
 *
 * With an external object cache, transients live in the cache rather than the database. They
 * cannot be enumerated and expire on their own after seven days.
 */
final class Uninstaller {

	/**
	 * Runs the cleanup.
	 */
	public static function run(): void {
		if ( is_multisite() ) {
			foreach ( get_sites(
				array(
					'fields' => 'ids',
					'number' => 0,
				)
			) as $site_id ) {
				switch_to_blog( (int) $site_id );
				self::run_for_site();
				restore_current_blog();
			}

			return;
		}

		self::run_for_site();
	}

	/**
	 * Cleans up the current site.
	 */
	private static function run_for_site(): void {
		global $wpdb;

		Feed_Scheduler::unschedule();

		// phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- Bulk cleanup of transient rows, which core offers no API for.
		$wpdb->query(
			$wpdb->prepare(
				"DELETE FROM {$wpdb->options} WHERE option_name LIKE %s OR option_name LIKE %s",
				$wpdb->esc_like( '_transient_' . Feed_Cache::PREFIX ) . '%',
				$wpdb->esc_like( '_transient_timeout_' . Feed_Cache::PREFIX ) . '%'
			)
		);
		// phpcs:enable

		delete_option( Feed_Lock::OPTION );
		delete_option( Activator::VERSION_OPTION );
		delete_option( \PulseCast\Frontend\Display_Route::FLUSH_OPTION );
	}
}