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           efrain | 
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           <?php
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           // This file is part of Moodle - http://moodle.org/
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           //
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           // Moodle is free software: you can redistribute it and/or modify
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           // it under the terms of the GNU General Public License as published by
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           // the Free Software Foundation, either version 3 of the License, or
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           // (at your option) any later version.
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           //
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           // Moodle is distributed in the hope that it will be useful,
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           // but WITHOUT ANY WARRANTY; without even the implied warranty of
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           // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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           // GNU General Public License for more details.
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           //
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           // You should have received a copy of the GNU General Public License
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           // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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           /**
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            * Contains class used to return completion progress information.
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            *
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            * @package    core_completion
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            * @copyright  2017 Mark Nelson <markn@moodle.com>
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            * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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            */
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           namespace core_completion;
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           defined('MOODLE_INTERNAL') || die();
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           require_once($CFG->libdir . '/completionlib.php');
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           /**
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            * Class used to return completion progress information.
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            *
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            * @package    core_completion
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            * @copyright  2017 Mark Nelson <markn@moodle.com>
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            * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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            */
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           ariadna | 
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           class progress {
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           efrain | 
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               /**
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                * Returns the course percentage completed by a certain user, returns null if no completion data is available.
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                *
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                * @param \stdClass $course Moodle course object
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                * @param int $userid The id of the user, 0 for the current user
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                * @return null|float The percentage, or null if completion is not supported in the course,
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                *         or there are no activities that support completion.
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                */
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           ariadna | 
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               public static function get_course_progress_percentage($course, $userid = 0) {
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           efrain | 
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                   global $USER;
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                   // Make sure we continue with a valid userid.
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                   if (empty($userid)) {
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                       $userid = $USER->id;
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                   }
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                   $completion = new \completion_info($course);
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                   // First, let's make sure completion is enabled.
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                   if (!$completion->is_enabled()) {
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                       return null;
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                   }
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                   if (!$completion->is_tracked_user($userid)) {
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                       return null;
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                   }
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                   // Before we check how many modules have been completed see if the course has.
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                   if ($completion->is_course_complete($userid)) {
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                       return 100;
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                   }
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                   // Get the number of modules that support completion.
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                   $modules = $completion->get_activities();
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                   $count = count($modules);
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                   if (!$count) {
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                       return null;
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                   }
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                   // Get the number of modules that have been completed.
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           ariadna | 
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                   $totalcompleted = $completion->count_modules_completed($userid);
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                   return ($totalcompleted / $count) * 100;
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           efrain | 
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               }
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           }
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