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<?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\Tracker;
use Piwik\Common;
use Piwik\EventDispatcher;
use Piwik\Plugin\Dimension\VisitDimension;
use Piwik\Tracker\Visit\VisitProperties;
/**
* Tracker service that finds the last known visit for the visitor being tracked.
*/
class VisitorRecognizer
{
/**
* Set when a visit was found. Stores the original values of the row that is currently stored in the DB when
* the visit was selected.
*/
const KEY_ORIGINAL_VISIT_ROW = 'originalVisit';
/**
* Local variable cache for the getVisitFieldsPersist() method.
*
* @var array
*/
private $visitFieldsToSelect;
/**
* See http://piwik.org/faq/how-to/faq_175/.
*
* @var bool
*/
private $trustCookiesOnly;
/**
* Length of a visit in seconds.
*
* @var int
*/
private $visitStandardLength;
/**
* Number of seconds that have to pass after an action before a new action from the same visitor is
* considered a new visit. Defaults to $visitStandardLength.
*
* @var int
*/
private $lookBackNSecondsCustom;
/**
* @var Model
*/
private $model;
/**
* @var EventDispatcher
*/
private $eventDispatcher;
/**
* @var array
*/
private $visitRow;
public function __construct($trustCookiesOnly, $visitStandardLength, $lookbackNSecondsCustom, \Piwik\Tracker\Model $model, EventDispatcher $eventDispatcher)
{
$this->trustCookiesOnly = $trustCookiesOnly;
$this->visitStandardLength = $visitStandardLength;
$this->lookBackNSecondsCustom = $lookbackNSecondsCustom;
$this->model = $model;
$this->eventDispatcher = $eventDispatcher;
}
public function setTrustCookiesOnly($trustCookiesOnly)
{
$this->trustCookiesOnly = $trustCookiesOnly;
}
public function findKnownVisitor($configId, VisitProperties $visitProperties, \Piwik\Tracker\Request $request)
{
$idSite = $request->getIdSite();
$idVisitor = $request->getVisitorId();
$userId = $request->getForcedUserId();
$isVisitorIdToLookup = !empty($idVisitor);
if ($isVisitorIdToLookup) {
$visitProperties->setProperty('idvisitor', $idVisitor);
Common::printDebug("Matching visitors with: visitorId=" . bin2hex($idVisitor) . " OR configId=" . bin2hex($configId));
} else {
Common::printDebug("Visitor doesn't have the piwik cookie...");
}
$persistedVisitAttributes = $this->getVisitorFieldsPersist();
$shouldMatchOneFieldOnly = $this->shouldLookupOneVisitorFieldOnly($isVisitorIdToLookup, $request);
list($timeLookBack, $timeLookAhead) = $this->getWindowLookupThisVisit($request);
$maxActions = \Piwik\Tracker\TrackerConfig::getConfigValue('create_new_visit_after_x_actions', $request->getIdSiteIfExists());
$visitRow = $this->model->findVisitor($idSite, $configId, $idVisitor, $userId, $persistedVisitAttributes, $shouldMatchOneFieldOnly, $isVisitorIdToLookup, $timeLookBack, $timeLookAhead);
if (!empty($maxActions) && $maxActions > 0 && !empty($visitRow['visit_total_actions']) && $maxActions <= $visitRow['visit_total_actions']) {
$this->visitRow = false;
return false;
}
$this->visitRow = $visitRow;
if ($visitRow && count($visitRow) > 0) {
$visitProperties->setProperty('idvisitor', $visitRow['idvisitor']);
$visitProperties->setProperty('user_id', $visitRow['user_id']);
Common::printDebug("The visitor is known (idvisitor = " . bin2hex($visitProperties->getProperty('idvisitor')) . ",\n config_id = " . bin2hex($configId) . ",\n last action = " . date("r", $visitProperties->getProperty('visit_last_action_time')) . ",\n first action = " . date("r", $visitProperties->getProperty('visit_first_action_time')) . ")");
return true;
} else {
Common::printDebug("The visitor was not matched with an existing visitor...");
return false;
}
}
public function removeUnchangedValues($visit, VisitProperties $originalVisit = null)
{
if (empty($originalVisit)) {
return $visit;
}
$originalRow = $originalVisit->getProperties();
if (!empty($originalRow['idvisitor']) && !empty($visit['idvisitor']) && bin2hex($originalRow['idvisitor']) === bin2hex($visit['idvisitor'])) {
unset($visit['idvisitor']);
}
$fieldsToCompareValue = array('user_id', 'visit_last_action_time', 'visit_total_time');
foreach ($fieldsToCompareValue as $field) {
if (!empty($originalRow[$field]) && !empty($visit[$field]) && $visit[$field] == $originalRow[$field]) {
// we can't use === eg for visit_total_time which may be partially an integer and sometimes a string
// because we check for !empty things should still work as expected though
// (eg we wouldn't compare false with 0)
unset($visit[$field]);
}
}
return $visit;
}
public function updateVisitPropertiesFromLastVisitRow(VisitProperties $visitProperties)
{
// These values will be used throughout the request
foreach ($this->getVisitorFieldsPersist() as $field) {
$value = $this->visitRow[$field];
if ($field == 'visit_last_action_time' || $field == 'visit_first_action_time') {
$value = strtotime($value);
}
// Set the immutable and mutable properties initial value
$visitProperties->initializeProperty($field, $value);
}
Common::printDebug("The visit is part of an existing visit (\n idvisit = {$visitProperties->getProperty('idvisit')},\n visit_goal_buyer' = " . $visitProperties->getProperty('visit_goal_buyer') . ")");
}
protected function shouldLookupOneVisitorFieldOnly($isVisitorIdToLookup, \Piwik\Tracker\Request $request)
{
$isForcedUserIdMustMatch = false !== $request->getForcedUserId();
// This setting would be enabled for Intranet websites, to ensure that visitors using all the same computer config, same IP
// are not counted as 1 visitor. In this case, we want to enforce and trust the visitor ID from the cookie.
if ($isVisitorIdToLookup && $this->trustCookiesOnly) {
return true;
}
if ($isForcedUserIdMustMatch) {
// if &iud was set, we must try and match both idvisitor and config_id
return false;
}
// If a &cid= was set, we force to select this visitor (or create a new one)
$isForcedVisitorIdMustMatch = $request->getForcedVisitorId() != null;
if ($isForcedVisitorIdMustMatch) {
return true;
}
if (!$isVisitorIdToLookup) {
return true;
}
return false;
}
/**
* By default, we look back 30 minutes to find a previous visitor (for performance reasons).
* In some cases, it is useful to look back and count unique visitors more accurately. You can set custom lookback window in
* [Tracker] window_look_back_for_visitor
*
* The returned value is the window range (Min, max) that the matched visitor should fall within
*
* @return array( datetimeMin, datetimeMax )
*/
protected function getWindowLookupThisVisit(\Piwik\Tracker\Request $request)
{
$lookAheadNSeconds = $this->visitStandardLength;
$lookBackNSeconds = $this->visitStandardLength;
if ($this->lookBackNSecondsCustom > $lookBackNSeconds) {
$lookBackNSeconds = $this->lookBackNSecondsCustom;
}
$timeLookBack = date('Y-m-d H:i:s', $request->getCurrentTimestamp() - $lookBackNSeconds);
$timeLookAhead = date('Y-m-d H:i:s', $request->getCurrentTimestamp() + $lookAheadNSeconds);
return array($timeLookBack, $timeLookAhead);
}
/**
* @return array
*/
private function getVisitorFieldsPersist()
{
if (is_null($this->visitFieldsToSelect)) {
$fields = array('idvisitor', 'idvisit', 'user_id', 'visit_exit_idaction_url', 'visit_exit_idaction_name', 'visitor_returning', 'visitor_seconds_since_first', 'visitor_seconds_since_order', 'visitor_count_visits', 'visit_goal_buyer', 'location_country', 'location_region', 'location_city', 'location_latitude', 'location_longitude', 'referer_name', 'referer_keyword', 'referer_type');
$dimensions = VisitDimension::getAllDimensions();
foreach ($dimensions as $dimension) {
if ($dimension->hasImplementedEvent('onExistingVisit') || $dimension->hasImplementedEvent('onAnyGoalConversion')) {
$fields[] = $dimension->getColumnName();
}
foreach ($dimension->getRequiredVisitFields() as $field) {
$fields[] = $field;
}
}
/**
* This event collects a list of [visit entity](/guides/persistence-and-the-mysql-backend#visits) properties that should be loaded when reading
* the existing visit. Properties that appear in this list will be available in other tracking
* events such as 'onExistingVisit'.
*
* Plugins can use this event to load additional visit entity properties for later use during tracking.
*
* This event is deprecated, use [Dimensions](http://developer.piwik.org/guides/dimensions) instead.
*
* @deprecated
*/
$this->eventDispatcher->postEvent('Tracker.getVisitFieldsToPersist', array(&$fields));
array_unshift($fields, 'visit_first_action_time');
array_unshift($fields, 'visit_last_action_time');
$this->visitFieldsToSelect = array_unique($fields);
}
return $this->visitFieldsToSelect;
}
public function getLastKnownVisit()
{
return $this->visitRow;
}
}