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<?php
/**
* ParticipantRestrictedAdmission.php
*
* Specifies restricted number of participants for course admission.
*
* 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 Thomas Hackl <thomas.hackl@uni-passau.de>
* @license http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
* @category Stud.IP
*/
class ParticipantRestrictedAdmission extends AdmissionRule
{
// --- ATTRIBUTES ---
/**
* Timestamp for execution of seat distribution algorithm
*/
public $distributionTime = null;
public $first_come_first_served_allowed = false;
public $minimum_timespan_to_distribution_time = 120;
public $prio_exists = false;
// --- OPERATIONS ---
/**
* Standard constructor
*
* @param String $ruleId
* @param String $courseSetId
*/
public function __construct($ruleId = '', $courseSetId = '')
{
parent::__construct($ruleId, $courseSetId);
$this->first_come_first_served_allowed = (bool)Config::get()->ENABLE_COURSESET_FCFS;
$this->default_message = _('Es stehen keine weiteren Plätze zur Verfügung.');
if ($ruleId) {
$this->load();
} else {
$this->id = $this->generateId('participantrestrictedadmissions');
}
}
public function isFCFSallowed()
{
return $this->first_come_first_served_allowed;
}
/**
* Deletes the admission rule and all associated data.
*/
public function delete()
{
if ($this->prio_exists) {
$set_id = DBManager::get()->fetchColumn("SELECT set_id FROM courseset_rule WHERE rule_id = ? LIMIT 1", [$this->id]);
//Delete priorities
AdmissionPriority::unsetAllPriorities($set_id);
}
parent::delete();
// Delete rule data.
$stmt = DBManager::get()->prepare("DELETE FROM `participantrestrictedadmissions`
WHERE `rule_id`=?");
$stmt->execute([$this->id]);
}
/**
* Gets some text that describes what this AdmissionRule (or respective
* subclass) does.
*/
public static function getDescription()
{
return _("Anmelderegeln dieses Typs legen fest, ob die zugeordneten Veranstaltungen eine maximale Teilnehmendenanzahl haben. Die Platzverteilung erfolgt automatisiert.");
}
/**
* Gets the time for seat distribution algorithm.
*
* @return int
*/
public function getDistributionTime()
{
return $this->distributionTime;
}
/**
* Return this rule's name.
*/
public static function getName()
{
return _("Beschränkte Teilnehmendenanzahl");
}
/**
* Gets the template that provides a configuration GUI for this rule.
*
* @return String
*/
public function getTemplate()
{
$factory = new Flexi\Factory(dirname(__FILE__).'/templates/');
// Open specific template for this rule and insert base template.
$tpl = $factory->open('configure');
$tpl->set_attribute('rule', $this);
return $tpl->render();
}
/**
* Helper function for loading rule definition from database.
*/
public function load()
{
// Load data.
$stmt = DBManager::get()->prepare("SELECT *
FROM `participantrestrictedadmissions` WHERE `rule_id`=? LIMIT 1");
$stmt->execute([$this->id]);
if ($current = $stmt->fetch(PDO::FETCH_ASSOC)) {
$this->message = $current['message'];
$this->distributionTime = $current['distribution_time'];
if ($current['distribution_time'] > 0) {
$this->prio_exists = DBManager::get()->fetchColumn("SELECT 1 FROM courseset_rule INNER JOIN priorities USING(set_id) WHERE rule_id = ? LIMIT 1", [$this->id]);
}
}
}
/**
* 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($data);
if (!empty($data['distributiondate'])) {
if (!$data['distributiontime']) {
$data['distributiontime'] = '23:59';
}
$ddate = strtotime($data['distributiondate'] . ' ' . $data['distributiontime']);
$this->setDistributionTime($ddate);
}
if (!empty($data['enable_FCFS'])) {
$this->setDistributionTime(0);
}
if (!empty($data['startdate'])) {
$starttime = strtotime($data['startdate'] . ' ' . $data['starttime']);
if ($starttime > time()) {
$this->minimum_timespan_to_distribution_time = $this->minimum_timespan_to_distribution_time + (($starttime - time()) / 60);
}
}
return $this;
}
/**
* Sets a new timestamp for seat distribution algorithm execution.
*
* @param int $newDistributionTime
* @return ParticipantRestrictedAdmission
*/
public function setDistributionTime($newDistributionTime)
{
$this->distributionTime = $newDistributionTime;
return $this;
}
/**
* Store rule definition to database.
*/
public function store()
{
// Store data.
$stmt = DBManager::get()->prepare("INSERT INTO `participantrestrictedadmissions`
(`rule_id`, `message`, `distribution_time`,
`mkdate`, `chdate`) VALUES (?, ?, ?, ?, ?)
ON DUPLICATE KEY UPDATE
`distribution_time`=VALUES(`distribution_time`),
message=VALUES(message), `chdate`=VALUES(`chdate`)");
$stmt->execute([$this->id, (string)$this->message,
(int)$this->distributionTime, time(), time()]);
}
/**
* A textual description of the current rule.
*
* @return String
*/
public function toString()
{
$factory = new Flexi\Factory(dirname(__FILE__).'/templates/');
$tpl = $factory->open('info');
$tpl->set_attribute('rule', $this);
return $tpl->render();
}
/**
* Validates if the given request data is sufficient to configure this rule
* (e.g. if required values are present).
*
* @param Array $data Request data
* @return Array Error messages.
*/
public function validate($data)
{
$errors = parent::validate($data);
if (!$data['distributiontime']) {
$data['distributiontime'] = '23:59';
}
$ddate = strtotime($data['distributiondate'] . ' ' . $data['distributiontime']);
if (empty($data['enable_FCFS']) && (empty($data['distributiondate']) || $ddate < (time() + $this->minimum_timespan_to_distribution_time * 60))) {
$errors[] = sprintf(_('Bitte geben Sie für die Platzverteilung ein Datum an, das weiter in der Zukunft liegt. Das frühestmögliche Datum ist %s.'), strftime('%x %R', time() + $this->minimum_timespan_to_distribution_time*60));
}
if (!empty($data['enable_FCFS']) && $data['distributiondate']) {
$errors[] = _('Sie können kein Datum für die automatische Platzverteilung einstellen und gleichzeitig die automatische Platzverteilung ausschalten.');
}
return $errors;
}
}
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