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<?php
namespace JsonApi\Routes\Courseware;
use Courseware\Unit;
use JsonApi\Errors\AuthorizationFailedException;
use JsonApi\Errors\RecordNotFoundException;
use JsonApi\JsonApiController;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
/**
* Displays the course's courseware units.
*/
class CoursesUnitsIndex extends JsonApiController
{
use CoursewareInstancesHelper;
protected $allowedIncludePaths = [
'structural-element',
'creator',
'feedback-element',
];
protected $allowedPagingParameters = ['offset', 'limit'];
/**
* @SuppressWarnings(PHPMD.UnusedFormalParameter)
*/
public function __invoke(Request $request, Response $response, $args)
{
$course = \Course::find($args['id']);
if (!$course) {
throw new RecordNotFoundException();
}
$user = $this->getUser($request);
if (!Authority::canIndexUnitsOfACourse($user, $course)) {
throw new AuthorizationFailedException();
}
$resources = Unit::findCoursesUnits($course);
$readable_resources = [];
foreach ($resources as $resource) {
if ($resource->canRead($user)) {
$readable_resources[] = $resource;
}
}
$total = count($readable_resources);
[$offset, $limit] = $this->getOffsetAndLimit();
return $this->getPaginatedContentResponse(array_slice($readable_resources, $offset, $limit), $total);
}
}
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