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<?php
/**
* SemesterOfStudyCondition.php
*
* All conditions concerning the semester of study in Stud.IP can be specified here.
*
* 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
*/
namespace UserFilterFields;
class SemesterOfStudyCondition extends \UserFilterField
{
// --- ATTRIBUTES ---
public $valuesDbTable = 'user_studiengang';
public $valuesDbIdField = 'semester';
public $userDataDbTable = 'user_studiengang';
public $userDataDbField = 'semester';
public static $sortOrder = 4;
// --- OPERATIONS ---
/**
* @see UserFilterField::__construct
*/
public function __construct($fieldId='')
{
parent::__construct($fieldId);
$this->validValues = [];
$this->relations = [
'DegreeCondition' => [
'local_field' => 'abschluss_id',
'foreign_field' => 'abschluss_id'
],
'SubjectCondition' => [
'local_field' => 'fach_id',
'foreign_field' => 'fach_id'
]
];
$this->validCompareOperators = [
'>=' => _('mindestens'),
'<=' => _('höchstens'),
'=' => _('ist'),
'!=' => _('ist nicht')
];
if (isset(self::$cached_valid_values[static::class])) {
$this->validValues = self::$cached_valid_values[static::class];
} else {
// Initialize to some value in case there are no semester numbers.
$maxsem = 15;
// Calculate the maximal available semester.
$stmt = \DBManager::get()->query("SELECT MAX(" . $this->valuesDbIdField . ") AS maxsem " .
"FROM `" . $this->valuesDbTable . "`");
if ($current = $stmt->fetch(\PDO::FETCH_ASSOC)) {
if ($current['maxsem']) {
$maxsem = $current['maxsem'];
}
}
for ($i = 1; $i <= $maxsem; $i++) {
$this->validValues[$i] = $i;
}
self::$cached_valid_values[static::class] = $this->validValues;
}
}
/**
* Get this field's display name.
*
* @return String
*/
public function getName()
{
return _('Fachsemester');
}
}
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