/**
* Handles a request that is sent by our javascript when the user
* visits a URL.
* @method handleRequest
* @static
*/
static function handleRequest()
{
try {
$result = 'success';
self::validateRequest();
list(self::$domain, self::$publisher) = self::domainAndPublisherFromRequest();
$min_wait = self::getFields(self::$publisher, 'min_wait');
self::$last_visit = false;
$sessionId = self::sessionIdFromRequest();
if (empty($sessionId)) {
// This is a new global session
$new_session = true;
$sessionId = self::newSession();
} else {
// This is an existing global session,
// but we may have to make a new hostname session
$new_session = false;
self::$hostname_session = self::hostnameSessionFromId($sessionId);
if (!self::$new_hostname_session) {
// See when was the last time we visited this hostname
self::$last_visit = self::getLastVisit($sessionId);
}
}
if (!self::$last_visit) {
// This is our first visit, so definitely insert it
self::$visit = self::insertVisitFromRequest();
$visit_id = self::$visit['id'];
} else {
// There has been a previous visit
$elapsed_seconds = time() - self::$last_visit['insertedTime'];
if ($elapsed_seconds >= $min_wait) {
// Time to insert a new visit
self::$visit = self::insertVisitFromRequest();
$visit_id = self::$visit['id'];
} else {
// Okay, why did you contact us? It is not time to insert a new visit.
$from_share_id = self::shareIdFromRequest();
if ($from_share_id) {
// Maybe because this user has followed a new share!
if (self::dbSelect('visit', compact('from_share_id', 'sessionId'))) {
// Nope, looks like they have already followed this share.
$result = 'already_followed';
$visit_id = self::$last_visit['id'];
self::respond(Q::json_encode(compact('result', 'sessionId', 'visit_id', 'min_wait')));
return;
}
// If we are here, that means we were contacted for a reason.
// A new share was just followed by the user.
// We are going to record the share information below.
// For now, start a new visit, from this share.
self::$visit = self::insertVisitFromRequest();
$visit_id = self::$visit['id'];
} else {
// There is no reason for you to contact us until min_wait is up.
$result = 'too_soon';
// Here is your current visit id. Now wait min_wait seconds
// unless you see #from_share_id
$visit_id = self::$last_visit['id'];
$min_wait = $min_wait - $elapsed_seconds;
self::respond(Q::json_encode(compact('result', 'sessionId', 'visit_id', 'min_wait')));
return;
}
}
}
if ($share_id = self::shareIdFromRequest()) {
// This visit comes from someone sharing through our system
if (self::$share = self::dbSelect('share', compact('share_id'))) {
// Share already exists in the database
if (self::$new_hostname_session) {
self::dbIncrement('share', array('visit_count', 'session_count'), compact('share_id'));
} else {
self::dbIncrement('share', array('visit_count'), compact('share_id'));
}
} else {
if ($share_id) {
// Share has not yet been recorded in the database
self::$share = self::insertShareFromRequest();
$id = self::$visit['id'];
self::dbIncrement('visit', array('share_count'), compact('id'));
}
}
// Okay, you had a reason to contact us. We updated the share.
self::respond(Q::json_encode(compact('result', 'sessionId', 'visit_id', 'min_wait')));
} else {
self::respond(Q::json_encode(compact('result', 'sessionId', 'visit_id', 'min_wait')));
}
} catch (Exception $e) {
self::respond(Q::json_encode(array('errors' => array($e->getMessage()))));
}
}