<?php
namespace MailPoet\Statistics;
if (!defined('ABSPATH')) exit;
use MailPoet\Entities\NewsletterEntity;
use MailPoet\Newsletter\Links\Links as NewsletterLinks;
use MailPoet\Util\Helpers;
use MailPoet\Util\SecondLevelDomainNames;
class GATracking {
/** @var SecondLevelDomainNames */
private $secondLevelDomainNames;
/** @var NewsletterLinks */
private $newsletterLinks;
public function __construct(
NewsletterLinks $newsletterLinks
) {
$this->secondLevelDomainNames = new SecondLevelDomainNames();
$this->newsletterLinks = $newsletterLinks;
}
public function applyGATracking($renderedNewsletter, NewsletterEntity $newsletter, $internalHost = null) {
if ($newsletter->getType() == NewsletterEntity::TYPE_NOTIFICATION_HISTORY && $newsletter->getParent() instanceof NewsletterEntity) {
$parentNewsletter = $newsletter->getParent();
$field = $parentNewsletter->getGaCampaign();
} else {
$field = $newsletter->getGaCampaign();
}
if (!empty($field)) {
$renderedNewsletter = $this->addGAParamsToLinks($renderedNewsletter, $field, $internalHost);
}
return $renderedNewsletter;
}
private function addGAParamsToLinks($renderedNewsletter, $gaCampaign, $internalHost = null) {
// join HTML and TEXT rendered body into a text string
$content = Helpers::joinObject($renderedNewsletter);
$extractedLinks = $this->newsletterLinks->extract($content);
$processedLinks = $this->addParams($extractedLinks, $gaCampaign, $internalHost);
list($content, $links) = $this->newsletterLinks->replace($content, $processedLinks);
// split the processed body with hashed links back to HTML and TEXT
list($renderedNewsletter['html'], $renderedNewsletter['text'])
= Helpers::splitObject($content);
return $renderedNewsletter;
}
private function addParams($extractedLinks, $gaCampaign, $internalHost = null) {
$processedLinks = [];
$params = 'utm_source=mailpoet&utm_medium=email&utm_campaign=' . urlencode($gaCampaign);
$internalHost = $internalHost ?: parse_url(home_url(), PHP_URL_HOST);
$internalHost = $this->secondLevelDomainNames->get($internalHost);
foreach ($extractedLinks as $extractedLink) {
if ($extractedLink['type'] !== NewsletterLinks::LINK_TYPE_URL) {
continue;
} elseif (strpos((string)parse_url($extractedLink['link'], PHP_URL_HOST), $internalHost) === false) {
// Process only internal links (i.e. pointing to current site)
continue;
}
list($path, $search, $hash) = $this->splitLink($extractedLink['link']);
$search = empty($search) ? $params : $search . '&' . $params;
$processedLink = $path . '?' . $search . ($hash ? '#' . $hash : '');
$link = $extractedLink['link'];
$processedLinks[$link] = [
'type' => $extractedLink['type'],
'link' => $link,
'processed_link' => $processedLink,
];
}
return $processedLinks;
}
private function splitLink($link) {
$parts = explode('#', $link);
$hash = implode('#', array_slice($parts, 1));
$parts = explode('?', $parts[0]);
$path = $parts[0];
$search = implode('?', array_slice($parts, 1));
return [$path, $search, $hash];
}
}