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✏️ Editing: GtmSiteTypeGuesser.php

<?php
/**
 * Matomo - free/libre analytics platform
 *
 * @link https://matomo.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 */
namespace Piwik\Plugins\SitesManager;

class GtmSiteTypeGuesser
{

public function guessSiteTypeFromResponse($response)
    {
        if (empty($response['data'])) {
            return SitesManager::SITE_TYPE_UNKNOWN;
        }

$needle = '/wp-content';
        if (strpos($response['data'], $needle) !== false) {
            return SitesManager::SITE_TYPE_WORDPRESS;
        }

$needle = '';
        if (strpos($response['data'], $needle) !== false) {
            return SitesManager::SITE_TYPE_SQUARESPACE;
        }

$needle = 'X-Wix-Published-Version';
        if (strpos($response['data'], $needle) !== false) {
            return SitesManager::SITE_TYPE_WIX;
        }

// https://github.com/joomla/joomla-cms/blob/staging/libraries/src/Application/WebApplication.php#L516
        // Joomla was the outcome of a fork of Mambo on 17 August 2005 - https://en.wikipedia.org/wiki/Joomla
        if (isset($response['headers']['expires']) && $response['headers']['expires'] === 'Wed, 17 Aug 2005 00:00:00 GMT') {
            return SitesManager::SITE_TYPE_JOOMLA;
        }

$needle = 'Shopify.theme';
        if (strpos($response['data'], $needle) !== false) {
            return SitesManager::SITE_TYPE_SHOPIFY;
        }

$needle = 'content="Microsoft SharePoint';
        if (strpos($response['data'], $needle) !== false) {
            return SitesManager::SITE_TYPE_SHAREPOINT;
        }

$needle = '<meta name="Generator" content="Drupal';
        if (strpos($response['data'], $needle) !== false) {
            return SitesManager::SITE_TYPE_DRUPAL;
        }

// https://github.com/drupal/drupal/blob/9.2.x/core/includes/install.core.inc#L1054
        // Birthday of Dries Buytaert, the founder of Drupal is on 19 November 1978 - https://en.wikipedia.org/wiki/Drupal
        if (isset($response['headers']['expires']) && $response['headers']['expires'] === 'Sun, 19 Nov 1978 05:00:00 GMT') {
            return SitesManager::SITE_TYPE_DRUPAL;
        }

$pattern = '/data-wf-(?:domain|page)=/i';
        if (preg_match($pattern, $response['data']) === 1) {
            return SitesManager::SITE_TYPE_WEBFLOW;
        }

return SitesManager::SITE_TYPE_UNKNOWN;
    }

/**
     * Detect GA3 usage from the site data
     *
     * @param array $response Extended HTTP Response
     * @return bool
     */
    public function detectGA3FromResponse(array $response): bool
    {
        if (empty($response['data'])) {
            return false;
        }

if (strpos($response['data'], '(i,s,o,g,r,a,m)') !== false) {
            return true;
        }

$tests = [
            "/UA-\d{5,}-\d{1,}/", "/google\-analytics\.com\/analytics\.js/", "/window\.ga\s?=\s?window\.ga/",
            "/google[ _\-]{0,1}analytics/i"
        ];

foreach ($tests as $test) {
            if (preg_match($test, $response['data']) === 1) {
                return true;
            }
        }
        return false;
    }

/**
     * Detect GA4 usage from the site data
     *
     * @param array $response Extended HTTP Response
     * @return bool
     */
    public function detectGA4FromResponse($response): bool
    {
        if (empty($response['data'])) {
            return false;
        }

if (strpos($response['data'], 'gtag.js') !== false) {
            return true;
        }

$tests = ["/properties\/[^\/]/", "/G-[A-Z0-9]{7,10}/", "/gtag\/js\?id=G-/"];
        foreach ($tests as $test) {
            if (preg_match($test, $response['data']) === 1) {
                return true;
            }
        }

return false;
    }

public function guessGtmFromResponse($response)
    {
        if (empty($response['data'])) {
            return false;
        }

$needle = 'gtm.start';

if (strpos($response['data'], $needle) !== false) {
            return true;
        }

if (strpos($response['data'], 'gtm.js') !== false) {
            return true;
        }

$tests = ["/googletagmanager/i"];
        foreach ($tests as $test) {
            if (preg_match($test, $response['data']) === 1) {
                return true;
            }
        }

return false;
    }
}

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