/**
* Builds a PiwikTracker object, used to track visits, pages and Goal conversions
* for a specific website, by using the Piwik Tracking API.
*
* @param int $idSite Id site to be tracked
* @param string $apiUrl "http://example.org/piwik/" or "http://piwik.example.org/"
* If set, will overwrite PiwikTracker::$URL
*/
function __construct($idSite, $apiUrl = false)
{
$this->cookieSupport = true;
$this->userAgent = false;
$this->localHour = false;
$this->localMinute = false;
$this->localSecond = false;
$this->hasCookies = false;
$this->plugins = false;
$this->visitorCustomVar = false;
$this->pageCustomVar = false;
$this->customData = false;
$this->forcedDatetime = false;
$this->token_auth = false;
$this->attributionInfo = false;
$this->ecommerceLastOrderTimestamp = false;
$this->ecommerceItems = array();
$this->requestCookie = '';
$this->idSite = $idSite;
$this->urlReferrer = @$_SERVER['HTTP_REFERER'];
$this->pageUrl = self::getCurrentUrl();
$this->ip = @$_SERVER['REMOTE_ADDR'];
$this->acceptLanguage = @$_SERVER['HTTP_ACCEPT_LANGUAGE'];
$this->userAgent = @$_SERVER['HTTP_USER_AGENT'];
if (!empty($apiUrl)) {
self::$URL = $apiUrl;
}
$this->visitorId = substr(md5(uniqid(rand(), true)), 0, self::LENGTH_VISITOR_ID);
}
public function addEcommerceItem($sku, $name = false, $category = false, $price = false, $quantity = false)
{
// Alter price / qty in case an item with the same SKU is already in the cart
if (!empty($sku) && isset($this->ecommerceItems[$sku])) {
$old = $this->ecommerceItems[$sku];
$price = ($old[3] * $old[4] + $price * $quantity) / ($old[4] + $quantity);
$quantity += $old[4];
}
parent::addEcommerceItem($sku, $name, $category, $price, $quantity);
}
