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<?php
namespace JsonApi\Routes\Courseware;
use Courseware\StructuralElement;
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 all children of a structural element.
*/
class ChildrenOfStructuralElementsIndex extends JsonApiController
{
protected $allowedPagingParameters = ['offset', 'limit'];
protected $allowedIncludePaths = ['containers', 'course', 'owner', 'editor', 'parent'];
/**
* @SuppressWarnings(PHPMD.UnusedFormalParameter)
*/
public function __invoke(Request $request, Response $response, $args)
{
if (!$resource = StructuralElement::find($args['id'])) {
throw new RecordNotFoundException();
}
if (!Authority::canShowStructuralElement($this->getUser($request), $resource)) {
throw new AuthorizationFailedException();
}
list($offset, $limit) = $this->getOffsetAndLimit();
return $this->getPaginatedContentResponse(
$resource->children->limit($offset, $limit),
count($resource->children)
);
}
}
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