<?php


class MonsterInsights_Notification_Multiple_Gtags extends MonsterInsights_Notification_Event
{
    public $notification_id = 'monsterinsights_notification_multiple_gtags';
    public $notification_interval = 30;
    public $notification_type = array( 'basic', 'lite', 'master', 'plus', 'pro' );
    public $notification_category = 'alert';
    public $notification_icon = 'warning';
    public $notification_priority = 1;

    public function prepare_notification_data( $notification ) {

        $response = wp_remote_get( site_url() );

        if ( is_array( $response ) ) {
            $content = $response['body'];

            $document = new DOMDocument();
            $document->loadHTML( $content );

            $gtag_count = 0;

            foreach( $document->getElementsByTagName('script') as $script ) {
                $script_src = $script->getAttribute('src');

                if ( preg_match("/googletagmanager.com\/gtag\/js/i", $script_src) ) {
                    $gtag_count++;
                }
            }

            if ( $gtag_count < 2 ) {
                return false;
            }

            $notification['title'] = __("Multiple Google Analytics Tags Found", "google-analytics-for-wordpress");
            $notification['content'] = __("MonsterInsights has detected multiple analytics tags on your website. Please disable the other plugin to ensure accurate tracking.", 'google-analytics-for-wordpress');

            return $notification;
        }

        return false;
    }
}

new MonsterInsights_Notification_Multiple_Gtags();