<?php
/* For licensing terms, see /license.txt */

/**
 * This script contains the server part of the xajax interaction process. The
 * client part is located in lp_api.php or other api's.
 * This script exists exclusively to comply with the SCORM 1.2 rules notes that
 * say that if the SCO doesn't give a status throughout its execution, then the
 * status should be automatically set to 'completed', then the score should be
 * evaluated against mastery_score and, if a raw score and mastery_score value
 * are set, assign the final status based on that.
 * As such, this script will:
 * 1 - check the current status for the given element is still 'not attempted'
 * 2 - check if there is a mastery score
 * 3 - check if there is a raw score
 * 4 - if 2 or 3 are false, change the status to 'completed', else compare
 * whether the raw score is higher than the mastery score. If not, the status
 * will be set to 'failed', if yes, the status will be set to 'passed'
 * 5 - update the status in the table of contents
 * @package chamilo.learnpath
 * @author Yannick Warnier <yannick.warnier@beeznest.com>
 */
/**
 * Code
 */
// Flag to allow for anonymous user - needs to be set before global.inc.php'
$use_anonymous = true;

// Name of the language file that needs to be included.
$language_file[] = 'learnpath';

require_once '../inc/global.inc.php';

/**
 * Writes an item's new values into the database and returns the operation result
 * @param   integer Learnpath ID
 * @param   integer User ID
 * @param   integer View ID
 * @param   integer Item ID
 * @return  string  JavaScript operations to execute as soon as returned
 */
function last_update_status($lp_id, $user_id, $view_id, $item_id) {
    error_log(__LINE__);
    global $_configuration;
    $debug = 0;
    $return = '';
    if ($debug > 0) { error_log('In last_update_status('.$lp_id.','.$user_id.','.$view_id.','.$item_id.')', 0); }
    require_once 'learnpath.class.php';
    require_once 'scorm.class.php';
    require_once 'learnpathItem.class.php';
    require_once 'scormItem.class.php';
    $mylp = '';
    if (isset($_SESSION['lpobject'])) {
        if ($debug > 1) { error_log('$_SESSION[lpobject] is set', 0); }
        $oLP = unserialize($_SESSION['lpobject']);
        if (!is_object($oLP)) {
            if ($debug > 2) { error_log(print_r($oLP, true), 0); }
            if ($debug > 2) { error_log('Building new lp', 0); }
            unset($oLP);
            $code = api_get_course_id();
            $mylp = new learnpath($code,$lp_id,$user_id);
        } else {
            if ($debug > 2) { error_log('Reusing session lp', 0); }
            $mylp = $oLP;
        }
    }
    error_log(__LINE__);

    // This function should only be used for SCORM paths.
    if ($mylp->get_type() != 2) {
        return;
    }
    $prereq_check = $mylp->prerequisites_match($item_id);
    $mystatus = '';
    if ($prereq_check === true) {
        error_log(__LINE__);
        // Launch the prerequisites check and set error if needed.
        $mylpi =& $mylp->items[$item_id];

        $mystatus_in_db = $mylpi->get_status(true);
        error_log($mystatus_in_db);
        if ($mystatus_in_db == 'not attempted' or $mystatus_in_db == '') {
        error_log(__LINE__);
            $mystatus = 'completed';
            $mastery_score = $mylpi->get_mastery_score();
            if ($mastery_score != -1) {
        error_log(__LINE__);
                $score = $mylpi->get_score();
                if ($score != 0 && $score >= $mastery_score) {
        error_log(__LINE__);
                    $mystatus = 'passed';
                } else {
        error_log(__LINE__);
                    $mystatus = 'failed';
                }
            }
            error_log(__LINE__);
            $mylpi->set_status($mystatus);
            $mylp->save_item($item_id, false);
        } else {
            error_log(__LINE__);
            return $return;
        }
    } else {
        error_log(__LINE__);
        return $return;
    }
    error_log(__LINE__);
    $mytotal = $mylp->get_total_items_count_without_chapters();
    $mycomplete = $mylp->get_complete_items_count();
    $myprogress_mode = $mylp->get_progress_bar_mode();
    $myprogress_mode = ($myprogress_mode==''?'%':$myprogress_mode);
    $return .= "update_toc('".$mystatus."','".$item_id."','no');";
    error_log('Return is now '.$return);
    $update_list = $mylp->get_update_queue();
    foreach ($update_list as $my_upd_id => $my_upd_status) {
        if ($my_upd_id != $item_id) { // Only update the status from other items (i.e. parents and brothers), do not update current as we just did it already.
            $return .= "update_toc('".$my_upd_status."','".$my_upd_id."','no');";
        }
    }
    $return .= "update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');";
    $return .="update_stats();";
    return $return;
    //return $objResponse;
}
error_log(__LINE__);
echo last_update_status(
            $_REQUEST['lid'],
            $_REQUEST['uid'],
            $_REQUEST['vid'],
            $_REQUEST['iid']);