<?php
/**
 * Uninstall cleanup: removes the plugin's options, cached data, scheduled jobs and the short
 * links stored on posts, on every site of a multisite network. Links in the UseClick.io
 * account are not touched.
 *
 * @package UseClick
 */

defined( 'WP_UNINSTALL_PLUGIN' ) || exit;

/**
 * Clean up the current site.
 */
function useclick_uninstall_site() {
	$key = (string) get_option( 'useclick_api_key', '' );
	if ( '' !== $key ) {
		delete_transient( 'useclick_account_' . md5( $key ) );
		delete_transient( 'useclick_trial_' . md5( $key ) );
		$site_id = (string) get_option( 'useclick_analytics_site_id', '' );
		foreach ( array( 1, 7, 30, 90 ) as $days ) {
			delete_transient( 'useclick_stats_' . md5( $key . '|' . $site_id . '|' . $days ) );
		}
	}
	delete_transient( 'useclick_click_counts' );
	delete_transient( 'useclick_slug_clicks' );
	delete_transient( 'useclick_bot_tokens' ); // Used by 1.4.0.

	$options = array(
		'useclick_api_key',
		'useclick_api_url', // Used by versions before 1.3.0.
		'useclick_version',
		'useclick_analytics_site_id',
		'useclick_analytics_site_domain',
		'useclick_analytics_enabled',
		'useclick_analytics_exclude_logged_in',
		'useclick_analytics_exclude_admins',
		'useclick_analytics_track_bots',
		'useclick_bot_tokens',
		'useclick_bot_queue',
		'useclick_notice_bots_opt_in',
		'useclick_analytics_start_error',
		'useclick_account_last_good',
	);
	foreach ( $options as $option ) {
		delete_option( $option );
	}

	wp_clear_scheduled_hook( 'useclick_refresh_bot_tokens' );
	wp_clear_scheduled_hook( 'useclick_flush_bot_queue' );

	delete_metadata( 'user', 0, 'useclick_setup_dismissed', '', true );
	delete_metadata( 'user', 0, 'useclick_report_days', '', true );
	delete_post_meta_by_key( '_useclick_short_url' );
	delete_post_meta_by_key( '_useclick_slug' );
}

if ( is_multisite() ) {
	foreach ( get_sites(
		array(
			'fields' => 'ids',
			'number' => 0,
		)
	) as $useclick_site_id ) {
		switch_to_blog( (int) $useclick_site_id );
		useclick_uninstall_site();
		restore_current_blog();
	}
} else {
	useclick_uninstall_site();
}