blindsidenetworks / moodle-mod_bigbluebuttonbn

            $file = reset($files);

            unset($files);

            $pnoncevalue = null;

            if (!is_null($id)) {

                // Create the nonce component for granting a temporary public access.

                $cache = cache::make_from_params(cache_store::MODE_APPLICATION,

                    'mod_bigbluebuttonbn',

                    'presentationdefault_cache');

                $pnoncekey = sha1(context_system::instance()->id);

                /* The item id was adapted for granting public access to the presentation once in order

                 * to allow BigBlueButton to gather the file. */

                $pnoncevalue = bigbluebuttonbn_generate_nonce();

                $cache->set($pnoncekey, array('value' => $pnoncevalue, 'counter' => 0));

            }

            $url = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(),

                $file->get_filearea(), $pnoncevalue, $file->get_filepath(), $file->get_filename());

    $file = reset($files);

    unset($files);

    $pnoncevalue = null;

    if (!is_null($id)) {

        // Create the nonce component for granting a temporary public access.

        $cache = cache::make_from_params(cache_store::MODE_APPLICATION, 'mod_bigbluebuttonbn',

            'presentation_cache');

        $pnoncekey = sha1($id);

        /* The item id was adapted for granting public access to the presentation once in order

         * to allow BigBlueButton to gather the file. */

        $pnoncevalue = bigbluebuttonbn_generate_nonce();

        $cache->set($pnoncekey, array('value' => $pnoncevalue, 'counter' => 0));

    }

    $url = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(),

        $file->get_filearea(), $pnoncevalue, $file->get_filepath(), $file->get_filename());

    return array('name' => $file->get_filename(), 'icon' => file_file_icon($file, 24),