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<?php
/**
* TermsAdmission.php
*
* Represents a rule for course access with conditions of admission to be accepted.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* @author Niklas Dettmer <ndettmer@uos.de>
* @license http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
* @category Stud.IP
*/
class TermsAdmission extends AdmissionRule
{
// Terms of admission
public $terms;
/**
* Standard constructor.
*
* @param String ruleId
*/
public function __construct($ruleId = '', $courseSetId = '')
{
parent::__construct($ruleId, $courseSetId);
if ($ruleId) {
$this->load();
} else {
$this->id = $this->generateId('termsadmissions');
}
}
/**
* Deletes the admission rule and all associated data.
*/
public function delete()
{
parent::delete();
$stmt = DBManager::get()->prepare('DELETE FROM termsadmissions WHERE rule_id = ?');
$stmt->execute([$this->getId()]);
}
/**
* Gets some text that describes what this AdmissionRule (or respective
* subclass) does.
*/
public static function getDescription()
{
return _('Mit dieser Anmelderegel können Sie einen Kurs mit spezifischen Teilnahmebedingungen realisieren. '
. 'Die Anmeldung ist erst möglich, nachdem diese akzeptiert wurden.');
}
/**
* Shows an input form
*
* @return string A template-based input form.
* @throws Flexi\TemplateNotFoundException
*/
public function getInput()
{
$factory = new Flexi\Factory(__DIR__ . '/templates');
$template = $factory->open('input');
$template->rule = $this;
return (string) MessageBox::info($template->render())->hideClose();
}
/**
* Return this rule's name.
*/
public static function getName() {
return _('Kurs mit Teilnahmebedingungen');
}
/**
* Gets the template that provides a configuration GUI for this rule.
*
* @return String
* @throws Flexi\TemplateNotFoundException
*/
public function getTemplate()
{
$factory = new Flexi\Factory(__DIR__ . '/templates');
$template = $factory->open('configure');
$template->rule = $this;
return $template->render();
}
/**
* Does the current rule allow the given user to register as participant
* in the given course?
*
* @param String userId
* @param String courseId
* @return Array
*/
public function ruleApplies($userId, $courseId)
{
$errors = [];
// check if the user has accepted the terms
if (Request::int('terms_accepted')) {
$_SESSION['terms_accepted_' . $this->getId()] = true;
}
if (!$_SESSION['terms_accepted_' . $this->getId()]) {
$errors[] = _('Um sich anzumelden, müssen Sie die Teilnahmebedingungen akzeptieren.');
}
return $errors;
}
/**
* Uses the given data to fill the object values. This can be used
* as a generic function for storing data if the concrete rule type
* isn't known in advance.
*
* @param Array $data
* @return AdmissionRule This object.
*/
public function setAllData($data)
{
parent::setAllData($data);
$this->terms = trim($data['terms']);
return $this;
}
/**
* Internal helper function for loading rule definition from database.
*/
public function load()
{
$rule = DBManager::get()->fetchOne('SELECT * FROM termsadmissions WHERE rule_id = ?', [$this->getId()]);
$this->terms = $rule['terms'];
return $this;
}
/**
* Store rule definition to database.
*/
public function store()
{
// Store data.
$stmt = DBManager::get()->prepare('INSERT INTO termsadmissions (rule_id, terms, mkdate, chdate) VALUES (?, ?, ?, ?)
ON DUPLICATE KEY UPDATE terms = VALUES(terms), chdate = VALUES(chdate)');
$stmt->execute([$this->id, $this->terms, time(), time()]);
}
/**
* A textual description of the current rule.
*
* @return String
* @throws Flexi\TemplateNotFoundException
*/
public function toString()
{
$factory = new Flexi\Factory(__DIR__ . '/templates/');
$template = $factory->open('info');
$template->rule = $this;
return $template->render();
}
}
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