<?php
/**
 * main-class for connection to LonCapa
 *
 * This class contains the main methods of the elearning-interface to connect to
 * LonCapa. Extends ConnectedCMS.
 *
 * @access   public
 * @modulegroup  elearning_interface_modules
 * @module       LonCapaConnectedCMS
 * @package  ELearning-Interface
 */
class LonCapaConnectedCMS extends ConnectedCMS
{
    public $user;
    protected $seminarId;
    protected $lcRequest;
    protected $cmsUrl;

    public function __construct($cms = '')
    {
        parent::__construct($cms);

        $this->seminarId = Context::getId();
        $this->user = User::findCurrent();
        $this->lcRequest = new LonCapaRequest();
        $this->cmsUrl = $this->ABSOLUTE_PATH_ELEARNINGMODULES;
    }


    /**
     * search for content modules
     *
     * returns found content modules
     * @throws AccessDeniedException
     * @param string $key keyword
     * @return array list of content modules
     */
    public function searchContentModules($key)
    {

        if (!$GLOBALS['perm']->have_studip_perm('tutor', $this->seminarId)) {
            throw new AccessDeniedException();
        }

        $url = $this->cmsUrl . '/courses?search=' . urlencode($key) . '&owner=' . urlencode($this->user->username);
        $response = $this->lcRequest->request($url);

        if ($response) {
            $courses = new SimpleXMLElement($response);

            $result = [];
            foreach ($courses->course as $course) {
                $temp = explode(':', (string)$course->owner);

                $result[] = [
                    'ref_id'  => (string)$course->id,
                    'title'   => (string)$course->description,
                    'authors' => $temp[0],
                    'type'    => $this->cms_type
                ];
            }
        }

        return $result;
    }
}