site_id = $site_id; } /** * Register hooks for outputting the tracking pixel. * * @return void */ public function add_hooks(): void { add_action('wp_head', [$this, 'output_tracking_script']); add_action('mc4wp_form_subscribed', [$this, 'capture_subscriber_email'], 10, 2); add_action('wp_footer', [$this, 'output_identify_script'], 99); } /** * Output the Mailchimp Site Tracking Pixel SDK script tag. * * @return void */ public function output_tracking_script(): void { if (empty($this->site_id)) { return; } $opts = mc4wp_get_options(); if (empty($opts['tracking_pixel_script_url'])) { return; } wp_enqueue_script('mc4wp-mailchimp-site-tracking-pixel', $opts['tracking_pixel_script_url'], [], MC4WP_VERSION, [ 'strategy' => 'defer', ]); } /** * Capture the subscriber email after a successful form subscription. * * Fires during the mc4wp_form_subscribed action hook. * * @since 4.13.0 * * @param MC4WP_Form $form The submitted form instance. * @param string $email The subscriber's email address. * @return void */ public function capture_subscriber_email($form, string $email): void { $this->identify_email = $email; } /** * Output inline script to identify the subscriber via the Mailchimp pixel SDK. * * Only outputs when a subscriber email was captured during this request. * * @since 4.13.0 * * @return void */ public function output_identify_script(): void { if (empty($this->identify_email) || empty($this->site_id)) { return; } echo '' . "\n"; } /** * Auto-fetch an existing Mailchimp Connected Site that matches the current domain, * or create a new one if none is found. * * @since 4.13.0 * * @return array{site_id: string, script_url: string}|false Array with site data on success, false on failure. */ public static function fetch_or_create_connected_site() { try { /** @var MC4WP_API_V3 $api */ $api = mc4wp('api'); $domain = self::get_site_domain(); $sites = $api->get_connected_sites(); // Try to find an existing site that matches our domain. $matched_site = null; foreach ($sites as $site) { $site_domain = isset($site->domain) ? self::normalize_domain($site->domain) : ''; if ($site_domain === self::normalize_domain($domain)) { $matched_site = $site; break; } } if (null === $matched_site) { // No match — create a new connected site using the e-commerce store ID as foreign_id // so it reuses any existing store connection where possible. $foreign_id = self::get_foreign_id(); $matched_site = $api->add_connected_site([ 'foreign_id' => $foreign_id, 'domain' => $domain, ]); } return [ 'site_id' => sanitize_text_field($matched_site->foreign_id ?? $matched_site->id ?? ''), 'script_url' => esc_url_raw($matched_site->site_script->url ?? ''), ]; } catch (Exception $e) { mc4wp('log')->error(sprintf('Tracking Pixel: error fetching/creating connected site. %s', $e->getMessage())); return false; } } /** * Returns the domain of the current site stripped of protocol. * * @return string */ public static function get_site_domain(): string { return (string) self::normalize_domain(get_home_url()); } /** * Strips protocol and trailing slashes from a URL/domain for comparison. * * @param string $url * @return string */ private static function normalize_domain(string $url): string { $domain = str_ireplace(['https://', 'http://', '://'], '', trim($url)); return rtrim($domain, '/'); } /** * Returns a foreign_id to use when registering a new connected site. * Reuses the e-commerce store ID when available so Mailchimp can link them. * * @return string */ private static function get_foreign_id(): string { $ecommerce_settings = get_option('mc4wp_ecommerce', []); if (! empty($ecommerce_settings['store_id'])) { return (string) $ecommerce_settings['store_id']; } return 'mc4wp-' . sanitize_title(get_bloginfo('name')) . '-' . get_current_blog_id(); } }