BitrixAnalytics.php

<?php

namespace DevGroup;

use Bitrix\Main\Config\Option;
use Bitrix\Main\Context;
use Bitrix\Main\EventManager;
use Bitrix\Main\HttpContext;
use Bitrix\Main\Page\Asset;
use Bitrix\Main\Page\AssetLocation;
use Bitrix\Main\Web\Json;

/**
 * Class: Analytics
 * Integration with Google Analytics
 */
class Analytics
{
    protected static $gaEvents = [];

    /**
     * Initial
     */
    public static function init()
    {
        $context = Context::getCurrent();
        if (!$context instanceof HttpContext) {
            return null;
        }

        // Force save product view enable
        // Required for triggering OnBeforeViewedAdd and OnViewedAdd events
        if ('Y' !== Option::get('sale', 'product_viewed_save', 'Y')) {
            Option::set('sale', 'product_viewed_save', 'Y');
        }

        // Remove views product from session for triggering events
        if (!empty($_SESSION['VIEWED_PRODUCT'])) {
            $_SESSION['PREVIOUS_VIEWED_PRODUCT'] = $_SESSION['VIEWED_PRODUCT'];
            $_SESSION['VIEWED_PRODUCT'] = -1;
        }

        $em = EventManager::getInstance();
        $em->AddEventHandler('sale', 'OnBeforeViewedAdd', [static::class, 'handleOnBeforeViewedAdd']);

        static::addHeadScript();
    }

    /**
     * Handle OnBeforeViewedAdd event
     * @param array $arFields
     */
    public static function handleOnBeforeViewedAdd($arFields)
    {
        echo 123; die;
    }

    protected static function addHeadScript()
    {}
}