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<?php
use Lti\ResourceLink;
/**
* course/lti.php - LTI Resources
*
* 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 Elmar Ludwig
* @license http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
*/
class Course_LtiController extends StudipController
{
protected $with_session = true;
protected bool $isModerator = false;
public function before_filter(&$action, &$args)
{
parent::before_filter($action, $args);
$this->range_id = Context::getId();
$this->course = Course::find($this->range_id);
$this->isModerator = LtiToolModule::isModerator($this->range_id);
}
/**
* Display the list of LTI Resources.
*/
public function index_action(): void
{
if (Navigation::hasItem('/course/lti/index')) {
Navigation::activateItem('/course/lti/index');
}
PageLayout::setTitle(_('LTI-Ressourcen'));
Helpbar::get()->addPlainText('', _('Auf dieser Seite können Sie externe Anwendungen einbinden, sofern diese den LTI-Standard (Version 1.x order 1.3a) unterstützen.'));
if ($this->isModerator) {
$widget = Sidebar::get()->addWidget(new ActionsWidget());
$widget->addLink(
_('LTI-Ressource hinzufügen'),
$this->url_for('admin/lti/resources/create'),
Icon::create('add')
);
}
//Check for error messages:
if (Request::get('resource_link_id') && (Request::submitted('lti_msg') || Request::submitted('lti_errormsg'))) {
$resourceLink = ResourceLink::findOneBySQL(
"`id` = :id AND `course_id` = :course_id",
[
'id' => Request::get('resource_link_id'),
'course_id' => $this->range_id
]
);
if ($resourceLink) {
if (Request::get('lti_msg')) {
PageLayout::postInfo(htmlReady($resourceLink->title), [Request::get('lti_msg')]);
}
if (Request::get('lti_errormsg')) {
PageLayout::postError(htmlReady($resourceLink->title), [Request::get('lti_errormsg')]);
}
}
}
$this->render_vue_app(
Studip\VueApp::create('lti/resources/Index')
);
}
/**
* Display the (simple) LTI grade book.
*/
public function grades_action(): void
{
if (Navigation::hasItem('/course/lti/grades')) {
Navigation::activateItem('/course/lti/grades');
}
$this->lti_data_array = ResourceLink::findBySQL(
"`course_id` = :course_id ORDER BY `position`",
['course_id' => $this->range_id]
);
if ($this->isModerator) {
$this->desc = Request::int('desc');
$this->members = CourseMember::findByCourseAndStatus($this->range_id, 'autor');
if ($this->desc) {
$this->members = array_reverse($this->members);
}
$widget = Sidebar::get()->addWidget(new ExportWidget());
$widget->addLink(
_('Ergebnisse exportieren'),
$this->url_for('course/lti/export_grades'),
Icon::create('download')
);
} else {
$this->render_action('grades_user');
}
Helpbar::get()->addPlainText('', _('Auf dieser Seite können Sie die Ergebnisse sehen, die von LTI-Tools zurückgemeldet wurden.'));
}
/**
* Export grades from the gradebook in CSV format.
*/
public function export_grades_action(): void
{
$lti_data_array = ResourceLink::findByCourse_id($this->range_id, 'ORDER BY position');
$columns = [_('Nachname'), _('Vorname')];
// add one column for each LTI tool block
foreach ($lti_data_array as $lti_data) {
$columns[] = $lti_data->title;
}
$data = [$columns];
foreach (CourseMember::findByCourseAndStatus($this->range_id, 'autor') as $member) {
$row = [$member->nachname, $member->vorname];
foreach ($lti_data_array as $lti_data) {
if ($grade = $lti_data->grades->findOneBy('user_id', $member->user_id)) {
$row[] = (float) $grade->score;
} else {
$row[] = '';
}
}
$data[] = $row;
}
$filename = Context::get()->name . ' - ' . _('Ergebnisse') . '.csv';
$this->render_csv($data, $filename);
}
}
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