/**
* Track information.
* Updates all the cookies, makes a server side request to Google Analytics.
*
* Defenitions of the Analytics Parameters are stored at:
* http://code.google.com/apis/analytics/docs/tracking/gaTrackingTroubleshooting.html
* http://www.cheatography.com/jay-taylor/cheat-sheets/google-analytics-utm-parameters-v2/
*
* @param array $extraParams
* @return boolean|GoogleAnalyticsServerSide
*/
private function track(array $extraParams = array())
{
if ($this->botInfo !== null && $this->botInfo->isBot()) {
return false;
}
$account = (string) $this->getAccount();
if (empty($account)) {
throw new Exception\DomainException('The account number must be set before any tracking can take place.');
}
$domainName = (string) $this->getServerName();
$documentReferer = (string) $this->getDocumentReferer();
$documentReferer = empty($documentReferer) && $documentReferer !== '0' ? '-' : urldecode($documentReferer);
$this->setCookies();
// Construct the gif hit url.
$queryParams = array('utmwv' => $this->getVersion(), 'utmn' => rand(0, 0x7fffffff), 'utmhn' => $domainName, 'utmr' => $documentReferer, 'utmac' => $account, 'utmcc' => $this->getCookiesString(), 'utmul' => $this->getAcceptLanguage(), 'utmcs' => $this->getCharset(), 'utmu' => 'q~');
if (0 === strpos($account, 'MO-')) {
$queryParams['utmip'] = $this->getIPToReport();
}
$queryParams = array_merge($queryParams, $extraParams);
if (null !== ($customVarString = $this->getCustomVariableString())) {
$queryParams['utme'] = (isset($queryParams['utme']) && !empty($queryParams['utme']) ? $queryParams['utme'] : '') . $customVarString;
}
$utmUrl = self::GIF_URL . '?' . http_build_query($queryParams, null, '&');
Http\Http::request($utmUrl);
return $this;
}
