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<?php
class MyStudygroupsController extends AuthenticatedController
{
public function before_filter(&$action, &$args)
{
parent::before_filter($action, $args);
if (!$GLOBALS['perm']->have_perm('root')) {
Navigation::activateItem('/browse/my_studygroups/index');
}
}
public function index_action($is_widget = false)
{
PageLayout::setHelpKeyword('Basis.MeineStudiengruppen');
PageLayout::setTitle(_('Meine Studiengruppen'));
URLHelper::removeLinkParam('cid');
$this->is_widget = (bool)$is_widget;
$this->studygroups = StudygroupModel::getStudygroups();
$this->nav_elements = MyRealmModel::calc_single_navigation($this->studygroups);
// do not render sidebar if this is the widget
if (!$this->is_widget) {
$this->set_sidebar();
}
}
public function proposals_action()
{
PageLayout::setHelpKeyword('Basis.MeineStudiengruppen');
PageLayout::setTitle(_('Meine Studiengruppen'));
URLHelper::removeLinkParam('cid');
$this->proposed_studygroups = $this->proposeStudygroups();
}
public function set_sidebar()
{
if ($GLOBALS['user']->perms === 'user') {
return;
}
$sidebar = Sidebar::Get();
$actions = new ActionsWidget();
$actions->addLink(
_('Neue Studiengruppe anlegen'),
URLHelper::getURL('dispatch.php/course/wizard', ['studygroup' => 1]),
Icon::create('add')
)->asDialog('size=auto');
if (count($this->studygroups) > 0) {
$actions->addLink(
_('Farbgruppierung ändern'),
URLHelper::getURL('dispatch.php/my_courses/groups/all/true'),
Icon::create('group4')
)->asDialog();
}
$sidebar->addWidget($actions);
}
public function proposeStudygroups($user_id = null, $amount = 4)
{
$user_id ??= User::findCurrent()->id;
$cache_id = 'core/studygroups/proposals/' . $user_id;
$cache = \Studip\Cache\Factory::getCache();
$studygroup_ids = $cache->read($cache_id);
if ($studygroup_ids !== false) {
return Course::findMany($studygroup_ids);
}
// Vorgeschlagen werden sollen Studiengruppen,
// a) in denen Personen sitzen, die auch in anderen Veranstaltungen sitzen, in denen der aktive Nutzer Mitglied ist
// b) die zu dem Studienbereich des Studierenden gehören
// c) die einfach neu sind
// und die zudem aktiv sind. Es wird eine Liste von 36 Studiengruppen gebaut, wovon drei alle 15 Minuten im Widget
// angezeigt werden.
$studygroup_sem_types = array_filter(
array_keys($GLOBALS['SEM_TYPE']),
fn($sem_type_id) => (bool) $GLOBALS['SEM_CLASS'][$GLOBALS['SEM_TYPE'][$sem_type_id]['class']]['studygroup_mode']
);
$query = "SELECT DISTINCT `Seminar_id`
FROM (
SELECT `Seminar_id` FROM (
-- Andere Personen aus meinen Veranstaltungen
SELECT `seminare`.`Seminar_id`, COUNT(`seminar_user`.`user_id`) AS `count_colleagues`
FROM (
SELECT colleagues.`user_id`
FROM `seminar_user` AS colleagues
JOIN `seminar_user` AS mine USING (`Seminar_id`)
WHERE mine.`user_id` = :me
AND colleagues.`user_id` != mine.`user_id`
) AS my_colleagues
JOIN `seminar_user`
ON (`my_colleagues`.`user_id` = `seminar_user`.`user_id`)
JOIN `seminare`
ON (`seminare`.`Seminar_id` = `seminar_user`.`Seminar_id`)
WHERE `seminare`.`status` IN (:studygroup_types)
AND NOT EXISTS(
SELECT 1
FROM `seminar_user`
WHERE `seminar_user`.`Seminar_id` = `seminare`.`Seminar_id`
AND `seminar_user`.`user_id` = :me
)
GROUP BY `seminare`.`seminar_id`
ORDER BY `count_colleagues` DESC
LIMIT 12
) AS `colleagues_groups`
UNION ALL
SELECT `Seminar_id` FROM (
-- Andere Personen aus meinen Studiengängen
SELECT DISTINCT `seminare`.`Seminar_id`
FROM `user_studiengang`
STRAIGHT_JOIN `mvv_stgteil`
ON (`mvv_stgteil`.`fach_id` = `user_studiengang`.`fach_id`)
STRAIGHT_JOIN `mvv_stg_stgteil`
ON (`mvv_stg_stgteil`.`stgteil_id` = `mvv_stgteil`.`stgteil_id`)
STRAIGHT_JOIN `mvv_studiengang`
ON (
`mvv_studiengang`.`studiengang_id` = `mvv_stg_stgteil`.`studiengang_id`
AND `mvv_studiengang`.`abschluss_id` = `user_studiengang`.`abschluss_id`
)
STRAIGHT_JOIN `studygroup_stgteil`
ON (`studygroup_stgteil`.`stgteil_id` = `mvv_stgteil`.`stgteil_id`)
STRAIGHT_JOIN `seminare`
ON (`seminare`.`Seminar_id` = `studygroup_stgteil`.`studygroup_id`)
WHERE `seminare`.`status` IN (:studygroup_types)
AND `user_studiengang`.`user_id` = :me
AND NOT EXISTS(
SELECT 1
FROM `seminar_user`
WHERE `seminar_user`.`Seminar_id` = `seminare`.`Seminar_id`
AND `seminar_user`.`user_id` = :me
)
LIMIT 12
) AS `same_studyarea_groups`
UNION ALL
SELECT `Seminar_id` FROM (
-- Neue Studiengruppen
SELECT `seminare`.`Seminar_id`
FROM `seminare`
WHERE `seminare`.`status` IN (:studygroup_types)
AND NOT EXISTS(
SELECT 1
FROM `seminar_user`
WHERE `seminar_user`.`Seminar_id` = `seminare`.`Seminar_id`
AND `seminar_user`.`user_id` = :me
)
ORDER BY `seminare`.`mkdate` DESC
LIMIT 12
) AS `new_groups`
) AS `all_groups`
LIMIT :amount";
$group_ids = DBManager::get()->fetchFirst($query, [
':studygroup_types' => $studygroup_sem_types,
':me' => $user_id,
':amount' => $amount,
]);
// Zufällig sortieren ist in PHP schneller als in SQL
$group_ids = shuffle($group_ids);
$cache->write($cache_id, $group_ids, 15 * 60);
return Course::findMany($group_ids);
}
}
|
