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<?php
/*
* Copyright (c) 2012 Rasmus Fuhse <fuhse@data-quest.de>
*
* 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.
*/
if (isset($GLOBALS['SEM_TYPE'])) {
$GLOBALS['SEM_TYPE_OLD_VAR'] = $GLOBALS['SEM_TYPE'];
}
/**
* Class to define and manage attributes of seminar types.
* Usually all sem-types are stored in a global variable $SEM_TYPE which is
* an array of SemType objects.
*
* SemType::getTypes() gets you all seminar types in an array.
*
* This class only represents the name of the type and gives a relation to a
* sem_class.
*/
class SemType implements ArrayAccess
{
protected $data = [];
static protected $sem_types = null;
/**
* Constructor can be set with integer of sem_class_id or an array of
* the old $SEM_CLASS style.
* @param integer | array $data
*/
public function __construct($data) {
$db = DBManager::get();
if (is_int($data)) {
$statement = $db->prepare("SELECT * FROM sem_types WHERE id = :id ");
$statement->execute(['id' => $data]);
$this->data = $statement->fetch(PDO::FETCH_ASSOC);
} else {
$this->data = $data;
}
}
/**
* Returns the number of seminars of this sem_type in Stud.IP
* @return integer
*/
public function countSeminars() {
$db = DBManager::get();
$statement = $db->prepare("SELECT COUNT(*) FROM seminare WHERE status = :sem_type ");
$statement->execute(['sem_type' => $this->data['id']]);
return (int) $statement->fetch(PDO::FETCH_COLUMN, 0);
}
/**
* stores all data in the database
* @return boolean success
*/
public function store() {
$db = DBManager::get();
$statement = $db->prepare(
"UPDATE sem_types " .
"SET name = :name, " .
"class = :class, " .
"chdate = UNIX_TIMESTAMP() " .
"WHERE id = :id ".
"");
StudipCacheFactory::getCache()->expire('DB_SEM_TYPES_ARRAY');
return $statement->execute([
'id' => $this->data['id'],
'name' => $this->data['name'],
'class' => $this->data['class']
]);
}
/**
* Deletes the sem_type-object. Will only delete,
* if there are no seminars in this sem_type.
* Remember to refresh the global $SEM_TYPE array.
* @return boolean : success of deletion
*/
public function delete() {
if ($this->countSeminars() === 0) {
$db = DBManager::get();
$statement = $db->prepare("
DELETE FROM sem_types
WHERE id = :id
");
StudipCacheFactory::getCache()->expire('DB_SEM_TYPES_ARRAY');
return $statement->execute([
'id' => $this->data['id']
]);
} else {
return false;
}
}
/**
* Sets an attribute of sem_type->data
* @param string $offset
* @param mixed $value
*/
public function set($offset, $value) {
$this->data[$offset] = $value;
}
public function getClass() {
return $GLOBALS['SEM_CLASS'][$this->data['class']] ?? SemClass::getDefaultSemClass();
}
/***************************************************************************
* ArrayAccess methods *
***************************************************************************/
/**
* deprecated, does nothing, should not be used
* @param string $offset
* @param mixed $value
*
* @todo Add void return type when Stud.IP requires PHP8 minimal
*/
#[ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
}
/**
* Compatibility function with old $SEM_TYPE variable for plugins. Maps the
* new array-structure to the old boolean values.
* @param integer $offset: name of attribute
* @return boolean|(localized)string
*
* @todo Add mixed return type when Stud.IP requires PHP8 minimal
*/
#[ReturnTypeWillChange]
public function offsetGet($offset)
{
switch ($offset) {
case "name":
return gettext($this->data['name']);
case in_array($offset, ["title_dozent", "title_tutor", "title_autor"]):
$sem_class = $this->getClass();
$title = [$sem_class[$offset], $sem_class[$offset.'_plural']];
return $title[0] || $title[1] ? $title : $this->data[$offset];
}
//ansonsten
return $this->data[$offset];
}
/**
* ArrayAccess method to check if an attribute exists.
* @param mixed $offset
* @return bool
*
* @todo Add bool return type when Stud.IP requires PHP8 minimal
*/
#[ReturnTypeWillChange]
public function offsetExists($offset)
{
return isset($this->data[$offset]);
}
/**
* deprecated, does nothing, should not be used
* @param string $offset
*
* @todo Add void return type when Stud.IP requires PHP8 minimal
*/
#[ReturnTypeWillChange]
public function offsetUnset($offset)
{
}
/***************************************************************************
* static methods *
***************************************************************************/
/**
* Returns an array of all SemTypes in Stud.IP. Equivalent to global
* $SEM_TYPE variable. This variable is statically stored in this class.
* @return array of SemType
*/
static public function getTypes() {
if (!is_array(self::$sem_types)) {
$db = DBManager::get();
self::$sem_types = [];
$cache = StudipCacheFactory::getCache();
$types_array = unserialize($cache->read('DB_SEM_TYPES_ARRAY'));
if (!$types_array) {
try {
$statement = $db->prepare(
"SELECT * FROM sem_types ORDER BY id ASC "
);
$statement->execute();
$types_array = $statement->fetchAll(PDO::FETCH_ASSOC);
if ($types_array) {
$cache = StudipCacheFactory::getCache();
$cache->write('DB_SEM_TYPES_ARRAY', serialize($types_array));
}
} catch (PDOException $e) {
//for use without or before migration 92
$type_array = $GLOBALS['SEM_TYPE_OLD_VAR'];
if (is_array($type_array)) {
ksort($type_array);
foreach ($type_array as $id => $type) {
self::$sem_types[$id] = new SemType($type);
}
} else {
self::$sem_types[1] = new SemType(['name' => 'default', 'class' => 1, 'id' => 1]);
}
}
}
foreach ($types_array as $sem_type) {
self::$sem_types[$sem_type['id']] = new SemType($sem_type);
}
}
return self::$sem_types;
}
static public function refreshTypes() {
self::$sem_types = null;
StudipCacheFactory::getCache()->expire('DB_SEM_TYPES_ARRAY');
return self::getTypes();
}
/**
* Gets all SemTypes that are allowed as group parents.
* @return array
*/
public static function getGroupingSemTypes()
{
return SimpleCollection::createFromArray(array_flatten(SemClass::getGroupClasses()->getSemTypes()))->pluck('id');
}
/**
* Gets all SemTypes that are allowed as group parents.
* @return array
*/
public static function getNonGroupingSemTypes()
{
$non_grouping = SimpleCollection::createFromArray(SemClass::getClasses())->findBy('is_group', false)->findBy('studygroup_mode', false);
return SimpleCollection::createFromArray(array_flatten($non_grouping->getSemTypes()))->pluck('id');
}
/**
* Static method only to keep the translationstrings of the values. It is
* never used within the system.
*/
static private function localization() {
_("Vorlesung");
_("Seminar");
_("Übung");
_("Praktikum");
_("Colloquium");
_("Kolloquium");
_("Forschungsgruppe");
_("sonstige");
_("Gremium");
_("Projektgruppe");
_("Kulturforum");
_("Veranstaltungsboard");
_("Studiengruppe");
}
}
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