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<?php
/*
* LtiResourceLink.php
* This file is part of Stud.IP.
*
* 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 Moritz Strohm
* @license http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
*/
use OAT\Library\Lti1p3Core\Resource\LtiResourceLink\LtiResourceLinkInterface;
use OAT\Library\Lti1p3Core\Util\Collection\Collection;
use OAT\Library\Lti1p3Core\Util\Collection\CollectionInterface;
/**
* The LtiResourceLink class is a model for the lti_resource_links table.
*
* @property int $id database column
* @property int $deployment_id database column
* @property string $course_id database column
* @property int $position database column
* @property int $mkdate database column
* @property int $chdate database column
* @property ?LtiDeployment $deployment related object
* @property ?Course $course related object
*/
class LtiResourceLink extends \SimpleORMap implements LtiResourceLinkInterface
{
protected static function configure($config = [])
{
$config['db_table'] = 'lti_resource_links';
$config['belongs_to']['course'] = [
'class_name' => Course::class,
'foreign_key' => 'course_id'
];
$config['belongs_to']['deployment'] = [
'class_name' => LtiDeployment::class,
'foreign_key' => 'deployment_id'
];
$config['registered_callbacks']['before_create'] = ['cbCalculatePosition'];
parent::configure($config);
}
/**
* Calculates the position for a new LTI resource link in the course.
*/
public function cbCalculatePosition() : void
{
$this->position = self::countByCourse_id($this->course_id);
}
/**
* Delete this entity.
*/
public function delete()
{
$course_id = $this->course_id;
$position = $this->position;
if ($result = parent::delete()) {
DBManager::get()->execute(
"UPDATE `lti_resource_links`
SET `position` = position - 1
WHERE `course_id` = :course_id AND `position` > :position",
[
'course_id' => $course_id,
'position' => $position
]
);
}
return $result;
}
/**
* Find a single entry by course_id and position.
*
* @return static|null
*/
public static function findByCourseAndPosition($course_id, $position)
{
return self::findOneBySQL('course_id = ? AND position = ?', [$course_id, $position]);
}
//OAT library LtiResourceLinkInterface and ResourceInterface implementation:
public function getUrl(): ?string
{
if ($this->deployment) {
return $this->deployment->getLaunchURL();
}
return null;
}
public function getIcon(): ?array
{
return null;
}
public function getThumbnail(): ?array
{
if ($this->course) {
return [$this->course->getItemAvatarURL()];
}
return null;
}
public function getIframe(): ?array
{
//Not supported.
return null;
}
public function getCustom(): ?array
{
//Not supported.
return null;
}
public function getLineItem(): ?array
{
// TODO: Implement getLineItem() method.
return null;
}
public function getAvailability(): ?array
{
// TODO: Implement getAvailability() method.
return null;
}
public function getSubmission(): ?array
{
// TODO: Implement getSubmission() method.
return null;
}
public function getIdentifier(): string
{
return strval($this->id);
}
public function getType(): string
{
return 'ltiResourceLink';
}
public function getTitle(): ?string
{
if ($this->deployment) {
return $this->deployment->title;
}
return null;
}
public function getText(): ?string
{
return null;
}
public function getProperties(): CollectionInterface
{
$collection = new Collection();
$collection->add([
'url' => $this->getUrl(),
'title' => $this->getTitle()
]);
return $collection;
}
public function normalize(): array
{
return array_filter(
array_merge(
$this->getProperties()->all(),
['type' => $this->getType()]
)
);
}
}
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