class.ilTestSessionFactory.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilTestSessionFactory
{
    private $testSession = array();
    
    private $testOBJ = null;

    public function __construct(ilObjTest $testOBJ)
    {
        $this->testOBJ = $testOBJ;
    }

    public function reset()
    {
        $this->testSession = array();
    }




    public function getSession($activeId = null)
    {
        if ($activeId === null || $this->testSession[$activeId] === null) {
            $testSession = $this->getNewTestSessionObject();

            $testSession->setRefId($this->testOBJ->getRefId());
            $testSession->setTestId($this->testOBJ->getTestId());

            if ($activeId) {
                $testSession->loadFromDb($activeId);
                $this->testSession[$activeId] = $testSession;
            } else {
                global $DIC;
                $ilUser = $DIC['ilUser'];

                $testSession->loadTestSession(
                    $this->testOBJ->getTestId(),
                    $ilUser->getId(),
                    $testSession->getAccessCodeFromSession()
                );

                return $testSession;
            }
        }

        return $this->testSession[$activeId];
    }

    public function getSessionByUserId($userId)
    {
        if (!isset($this->testSession[$this->buildCacheKey($userId)])) {
            $testSession = $this->getNewTestSessionObject();

            $testSession->setRefId($this->testOBJ->getRefId());
            $testSession->setTestId($this->testOBJ->getTestId());

            $testSession->loadTestSession($this->testOBJ->getTestId(), $userId);
            
            $this->testSession[$this->buildCacheKey($userId)] = $testSession;
        }

        return $this->testSession[$this->buildCacheKey($userId)];
    }

    private function getNewTestSessionObject()
    {
        switch ($this->testOBJ->getQuestionSetType()) {
            case ilObjTest::QUESTION_SET_TYPE_FIXED:
            case ilObjTest::QUESTION_SET_TYPE_RANDOM:

                require_once 'Modules/Test/classes/class.ilTestSession.php';
                $testSession = new ilTestSession();
                break;

            case ilObjTest::QUESTION_SET_TYPE_DYNAMIC:

                require_once 'Modules/Test/classes/class.ilTestSessionDynamicQuestionSet.php';
                $testSession = new ilTestSessionDynamicQuestionSet();
                break;
        }
        
        return $testSession;
    }

    private function buildCacheKey($userId)
    {
        return "{$this->testOBJ->getTestId()}::{$userId}";
    }
}