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<?php
declare(strict_types=1);
namespace WPMedia\BackWPup\Admin\Beacon;
use WPMedia\BackWPup\EventManagement\SubscriberInterface;
use WPMedia\BackWPup\Dependencies\WPMedia\Mixpanel\Optin;
use WPMedia\BackWPup\Dependencies\WPMedia\Mixpanel\TrackingPlugin;
class Subscriber implements SubscriberInterface {
/**
* Mixpanel Tracking instance.
*
* @var TrackingPlugin
*/
private $tracking;
/**
* Mixpanel Optin instance.
*
* @var Optin
*/
private $optin;
/**
* Subscriber constructor.
*
* @param TrackingPlugin $tracking Mixpanel Tracking instance.
* @param Optin $optin Mixpanel Optin instance.
*/
public function __construct( TrackingPlugin $tracking, Optin $optin ) {
$this->tracking = $tracking;
$this->optin = $optin;
}
/**
* Return an array of events that this subscriber wants to listen to.
*
* @return array
*/
public static function get_subscribed_events(): array {
return [
'backwpup_url_add_hash' => 'add_hash_to_url',
];
}
/**
* Add a unique hash to URLs for tracking purposes, but only for users who have opted in to tracking and only for backwpup websites.
*
* @param string $url The original URL to potentially modify.
*
* @return string The modified URL with a hash parameter if conditions are met, or the original URL otherwise.
*/
public function add_hash_to_url( string $url ): string {
// Only add hash if user has opted in to tracking.
if ( ! $this->optin->is_enabled() ) {
return $url;
}
// Parse host and ensure URL belongs to backwpup.com or backwpup.de (or their subdomains).
$host = wp_parse_url( $url, PHP_URL_HOST );
if ( empty( $host ) ) {
return $url;
}
$host = strtolower( $host );
$allowed_domains = [
'backwpup.com',
'backwpup.de',
];
$is_allowed_domain = false;
foreach ( $allowed_domains as $domain ) {
if ( $host === $domain || ( strlen( $host ) > strlen( $domain ) && substr( $host, -strlen( '.' . $domain ) ) === '.' . $domain ) ) {
$is_allowed_domain = true;
break;
}
}
if ( ! $is_allowed_domain ) {
return $url;
}
$user = wp_get_current_user();
// Do not add a hash if the current user email is empty.
if ( empty( $user->user_email ) ) {
return $url;
}
$email_hash = $this->tracking->hash( $user->user_email );
$url = add_query_arg( 'bwu_hash', $email_hash, $url );
return $url;
}
}