/**
* Fetch the SessionInfo(s) for a request
* @param WebRequest $request
* @return SessionInfo|null
*/
private function getSessionInfoForRequest(WebRequest $request)
{
// Call all providers to fetch "the" session
$infos = array();
foreach ($this->getProviders() as $provider) {
$info = $provider->provideSessionInfo($request);
if (!$info) {
continue;
}
if ($info->getProvider() !== $provider) {
throw new \UnexpectedValueException("{$provider} returned session info for a different provider: {$info}");
}
$infos[] = $info;
}
// Sort the SessionInfos. Then find the first one that can be
// successfully loaded, and then all the ones after it with the same
// priority.
usort($infos, 'MediaWiki\\Session\\SessionInfo::compare');
$retInfos = array();
while ($infos) {
$info = array_pop($infos);
if ($this->loadSessionInfoFromStore($info, $request)) {
$retInfos[] = $info;
while ($infos) {
$info = array_pop($infos);
if (SessionInfo::compare($retInfos[0], $info)) {
// We hit a lower priority, stop checking.
break;
}
if ($this->loadSessionInfoFromStore($info, $request)) {
// This is going to error out below, but we want to
// provide a complete list.
$retInfos[] = $info;
}
}
}
}
if (count($retInfos) > 1) {
$ex = new \OverflowException('Multiple sessions for this request tied for top priority: ' . join(', ', $retInfos));
$ex->sessionInfos = $retInfos;
throw $ex;
}
return $retInfos ? $retInfos[0] : null;
}
public function testCompare()
{
$id = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';
$info1 = new SessionInfo(SessionInfo::MIN_PRIORITY + 1, array('id' => $id));
$info2 = new SessionInfo(SessionInfo::MIN_PRIORITY + 2, array('id' => $id));
$this->assertTrue(SessionInfo::compare($info1, $info2) < 0, '<');
$this->assertTrue(SessionInfo::compare($info2, $info1) > 0, '>');
$this->assertTrue(SessionInfo::compare($info1, $info1) === 0, '==');
}
