124 lines
3.8 KiB
PHP
124 lines
3.8 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2017 (original work) Open Assessment Technologies SA ;
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*
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* @author Alexander Zagovorychev <zagovorichev@1pt.com>
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*/
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namespace oat\taoProctoring\model\execution;
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use oat\generis\model\OntologyAwareTrait;
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use oat\taoDelivery\model\execution\ServiceProxy;
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use oat\taoProctoring\model\authorization\TestTakerAuthorizationService;
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use oat\taoQtiTest\models\SectionPauseService;
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use oat\taoQtiTest\models\runner\session\TestSession;
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use qtism\data\AssessmentItemRef;
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use qtism\runtime\tests\AssessmentTestSessionState;
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class ProctoredSectionPauseService extends SectionPauseService
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{
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use OntologyAwareTrait;
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/**
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* This category triggers the section pause
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*/
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const PAUSE_CATEGORY = 'x-tao-proctored-auto-pause';
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private $isProctored = null;
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/**
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* Checked the given session could be paused at some point
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* (in other words : is section pause enabled)
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* @param $session
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* @return bool
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*/
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public function couldBePaused(TestSession $session = null)
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{
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return ($session->getState() === AssessmentTestSessionState::INTERACTING && $this->isProctored($session));
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}
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/**
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* Checked that section can be paused
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* @param TestSession $session
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* @return bool
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*/
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public function isPausable(TestSession $session = null)
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{
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if ($this->couldBePaused($session)) {
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/** @var AssessmentItemRef $itemRef */
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$itemRef = $session->getCurrentAssessmentItemRef();
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return $this->isItemPausable($itemRef);
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}
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return false;
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}
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/**
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* Check if we can move backward : when leaving a pausable section,
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* we can't move backward.
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*
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* @param TestSession $session
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* @return bool
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*/
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public function canMoveBackward(TestSession $session = null)
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{
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if ($this->couldBePaused($session)) {
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return ! $this->isItemPausable($session->getCurrentAssessmentItemRef());
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}
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return true;
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}
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/**
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* Is the given section proctored
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*
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* @param TestSession $session
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* @return bool false by default
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*/
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private function isProctored(TestSession $session)
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{
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//check only once
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if (is_null($this->isProctored)) {
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$this->isProctored = false;
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if (!is_null($session)) {
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$user = \common_session_SessionManager::getSession()->getUser();
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$deliveryExecution = ServiceProxy::singleton()->getDeliveryExecution($session->getSessionId());
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$this->isProctored = $this->getServiceManager()->get(TestTakerAuthorizationService::SERVICE_ID)->isProctored($deliveryExecution->getDelivery(), $user);
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}
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}
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return $this->isProctored;
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}
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/**
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* Is the given itemRef pauseable (ie. has the given category)
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*
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* @param AssessmentItemRef $itemRef
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* @return bool false by default
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*/
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private function isItemPausable(AssessmentItemRef $itemRef)
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{
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if (!is_null($itemRef)) {
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return $itemRef->getCategories()->contains(self::PAUSE_CATEGORY);
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}
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return false;
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}
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}
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