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378 lines
16 KiB
378 lines
16 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* This script contains the server part of the xajax interaction process. The client part is located
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* in lp_api.php or other api's.
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* This is a first attempt at using xajax and AJAX in general, so the code might be a bit unsettling.
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* @package chamilo.learnpath
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* @author Yannick Warnier <ywarnier@beeznest.org>
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*/
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// Flag to allow for anonymous user - needs to be set before global.inc.php.
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$use_anonymous = true;
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require_once '../inc/global.inc.php';
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/**
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* Backup an item's values into the javascript API as "old" values (so we still have them at hand)
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* @param integer Learnpath ID
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* @param integer User ID
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* @param integer View ID
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* @param integer Item ID
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* @param double Current score
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* @param double Maximum score
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* @param double Minimum score
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* @param string Lesson status
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* @param string Session time
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* @param string Suspend data
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* @param string Lesson location
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*/
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function backup_item_details($lp_id, $user_id, $view_id, $item_id, $score = -1, $max = -1, $min = -1, $status = '', $time = '', $suspend = '', $location = '') {
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$objResponse = new xajaxResponse();
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$objResponse->addScript(
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"old_score=".$score.";" .
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"old_max=".$max.";" .
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"old_min=".$min.";" .
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"old_lesson_status='".$status."';" .
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"old_session_time='".$time."';" .
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"lms_old_item_id='".$item_id."';" .
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"old_suspend_data='".$suspend."';" .
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"old_lesson_location='".$location."';");
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//$objResponse->addAlert('data for item '.$item_id.', user '.$user_id.' backed up');
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return $objResponse;
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}
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/**
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* Writes an item's new values into the database and returns the operation result
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* @param integer Learnpath ID
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* @param integer User ID
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* @param integer View ID
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* @param integer Item ID
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* @param double Current score
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* @param double Maximum score
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* @param double Minimum score
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* @param string Lesson status
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* @param string Session time
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* @param string Suspend data
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* @param string Lesson location
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* @param string Core exit SCORM string
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*/
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function save_item($lp_id, $user_id, $view_id, $item_id, $score = -1, $max = -1, $min = -1, $status = '', $time = 0, $suspend = '', $location = '', $interactions = array(), $core_exit = 'none') {
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global $_configuration;
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$debug = 0;
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if ($debug > 0) { error_log('In xajax_save_item('.$lp_id.','.$user_id.','.$view_id.','.$item_id.','.$score.','.$max.','.$min.',"'.$status.'",'.$time.',"'.$suspend.'","'.$location.'","'.(count($interactions)>0?$interactions[0]:'').'","'.$core_exit.'")', 0); }
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$objResponse = new xajaxResponse();
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$mylp = learnpath::getLpFromSession(api_get_course_id(), $lp_id, $user_id);
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$prereq_check = $mylp->prerequisites_match($item_id);
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if ($prereq_check === true) { // Launch the prerequisites check and set error if needed.
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$mylpi =& $mylp->items[$item_id];
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//$mylpi->set_lp_view($view_id);
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if ($max != -1) {
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$mylpi->max_score = $max;
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}
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if ($min != -1) {
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$mylpi->min_score = $min;
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}
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if ($score != -1) {
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$mylpi->set_score($score);
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}
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if ($status != '') {
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if ($debug > 1) { error_log('Calling set_status('.$status.') from xajax', 0); }
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$mylpi->set_status($status);
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if ($debug > 1) { error_log('Done calling set_status from xajax', 0); }
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}
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if ($time != '') {
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// If big integer, then it's a timestamp, otherwise it's normal scorm time.
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if ($time == intval(strval($time)) && $time > 1000000) {
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$real_time = time() - $time;
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//$real_time += $mylpi->get_total_time();
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$mylpi->set_time($real_time, 'int');
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} else {
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$mylpi->set_time($time);
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}
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}
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if ($suspend != '') {
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$mylpi->current_data = $suspend; //escapetxt($suspend);
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}
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if ($location != '') {
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$mylpi->set_lesson_location($location);
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}
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// Deal with interactions provided in arrays in the following format
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// id(0), type(1), time(2), weighting(3), correct_responses(4), student_response(5), result(6), latency(7)
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if (is_array($interactions) && count($interactions) > 0) {
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foreach ($interactions as $index => $interaction) {
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$mylpi->add_interaction($index, $interactions[$index]);
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}
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}
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$mylpi->set_core_exit($core_exit);
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$mylp->save_item($item_id, false);
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} else {
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return $objResponse;
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}
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$mystatus = $mylpi->get_status(false);
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$mytotal = $mylp->get_total_items_count_without_chapters();
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$mycomplete = $mylp->get_complete_items_count();
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$myprogress_mode = $mylp->get_progress_bar_mode();
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$myprogress_mode = ($myprogress_mode == '' ? '%' : $myprogress_mode);
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//$mylpi->write_to_db();
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$_SESSION['lpobject'] = serialize($mylp);
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if ($mylpi->get_type()!='sco'){
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// If this object's JS status has not been updated by the SCORM API, update now.
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$objResponse->addScript("lesson_status='".$mystatus."';");
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}
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$objResponse->addScript("update_toc('".$mystatus."','".$item_id."');");
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$update_list = $mylp->get_update_queue();
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foreach ($update_list as $my_upd_id => $my_upd_status) {
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if ($my_upd_id != $item_id) { // Only update the status from other items (i.e. parents and brothers), do not update current as we just did it already.
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$objResponse->addScript("update_toc('".$my_upd_status."','".$my_upd_id."');");
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}
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}
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$objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
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if ($debug > 0) {
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$objResponse->addScript("logit_lms('Saved data for item ".$item_id.", user ".$user_id." (status=".$mystatus.")',2)");
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if ($debug > 1) { error_log('End of xajax_save_item()', 0); }
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}
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if (!isset($_SESSION['login_as'])) {
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// If $_SESSION['login_as'] is set, then the user is an admin logged as the user.
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$tbl_track_login = Database :: get_main_table(TABLE_STATISTIC_TRACK_E_LOGIN);
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$sql_last_connection = "SELECT login_id, login_date FROM $tbl_track_login
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WHERE login_user_id='".api_get_user_id()."' ORDER BY login_date DESC LIMIT 0,1";
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$q_last_connection = Database::query($sql_last_connection);
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if (Database::num_rows($q_last_connection) > 0) {
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$row = Database::fetch_array($q_last_connection);
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$i_id_last_connection = $row['login_id'];
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$now = api_get_utc_datetime();
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$s_sql_update_logout_date = "UPDATE $tbl_track_login SET logout_date = '$now' WHERE login_id='$i_id_last_connection'";
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Database::query($s_sql_update_logout_date);
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}
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}
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return $objResponse;
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}
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/**
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* Writes an item's new values into the database and returns the operation result
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* @param integer Learnpath ID
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* @param integer User ID
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* @param integer View ID
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* @param integer Item ID
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* @param array Objectives array
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*/
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function save_objectives($lp_id, $user_id, $view_id, $item_id, $objectives = array()) {
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global $_configuration;
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$debug = 0;
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if ($debug > 0) { error_log('In xajax_save_objectives('.$lp_id.','.$user_id.','.$view_id.','.$item_id.',"'.(count($objectives) > 0 ? count($objectives) : '').'")', 0); }
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$objResponse = new xajaxResponse();
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$mylp = learnpath::getLpFromSession(api_get_course_id(), $lp_id, $user_id);
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$mylpi =& $mylp->items[$item_id];
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if (is_array($objectives) && count($objectives)>0){
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foreach($objectives as $index=>$objective){
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//error_log(__FILE__.' '.__LINE__.' '.$objectives[$index][0], 0);
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$mylpi->add_objective($index,$objectives[$index]);
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}
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$mylpi->write_objectives_to_db();
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}
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return $objResponse;
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}
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/**
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* Get one item's details
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* @param integer LP ID
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* @param integer user ID
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* @param integer View ID
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* @param integer Current item ID
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* @param integer New item ID
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*/
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function switch_item_details($lp_id, $user_id, $view_id, $current_item, $next_item) {
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global $charset;
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$debug = 0;
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if ($debug > 0) { error_log('In xajax_switch_item_details('.$lp_id.','.$user_id.','.$view_id.','.$current_item.','.$next_item.')', 0); }
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$objResponse = new xajaxResponse();
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/*$item_id may be one of:
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* -'next'
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* -'previous'
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* -'first'
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* -'last'
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* - a real item ID
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*/
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$mylp = learnpath::getLpFromSession(api_get_course_id(), $lp_id, $user_id);
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$new_item_id = 0;
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switch ($next_item) {
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case 'next':
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$mylp->set_current_item($current_item);
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$mylp->next();
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$new_item_id = $mylp->get_current_item_id();
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if ($debug > 1) { error_log('In {next} - next item is '.$new_item_id.'(current: '.$current_item.')', 0); }
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break;
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case 'previous':
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$mylp->set_current_item($current_item);
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$mylp->previous();
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$new_item_id = $mylp->get_current_item_id();
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if ($debug > 1) { error_log('In {previous} - next item is '.$new_item_id.'(current: '.$current_item.')', 0); }
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break;
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case 'first':
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$mylp->set_current_item($current_item);
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$mylp->first();
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$new_item_id = $mylp->get_current_item_id();
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if ($debug > 1) { error_log('In {first} - next item is '.$new_item_id.'(current: '.$current_item.')', 0); }
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break;
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case 'last':
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break;
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default:
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// Should be filtered to check it's not hacked.
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if($next_item == $current_item){
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// If we're opening the same item again.
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$mylp->items[$current_item]->restart();
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}
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$new_item_id = $next_item;
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$mylp->set_current_item($new_item_id);
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if ($debug > 1) { error_log('In {default} - next item is '.$new_item_id.'(current: '.$current_item.')', 0); }
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break;
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}
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$mylp->start_current_item(true);
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if ($mylp->force_commit){
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$mylp->save_current();
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}
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//$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
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if (is_object($mylp->items[$new_item_id])) {
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$mylpi = $mylp->items[$new_item_id];
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} else {
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if ($debug > 1) { error_log('In switch_item_details - generating new item object', 0); }
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$mylpi = new learnpathItem($new_item_id, $user_id);
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$mylpi->set_lp_view($view_id);
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}
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/*
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* now get what's needed by the SCORM API:
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* -score
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* -max
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* -min
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* -lesson_status
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* -session_time
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* -suspend_data
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*/
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$myscore = $mylpi->get_score();
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$mymax = $mylpi->get_max();
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$mymin = $mylpi->get_min();
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$mylesson_status = $mylpi->get_status();
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$mylesson_location = $mylpi->get_lesson_location();
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$mytotal_time = $mylpi->get_scorm_time('js');
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$mymastery_score = $mylpi->get_mastery_score();
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$mymax_time_allowed = $mylpi->get_max_time_allowed();
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$mylaunch_data = $mylpi->get_launch_data();
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/*
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if ($mylpi->get_type() == 'asset') {
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// Temporary measure to save completion of an asset. Later on, Chamilo should trigger something on unload, maybe... (even though that would mean the last item cannot be completed)
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$mylesson_status = 'completed';
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$mylpi->set_status('completed');
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$mylpi->save();
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}
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*/
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$mysession_time = $mylpi->get_total_time();
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$mysuspend_data = $mylpi->get_suspend_data();
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$mylesson_location = $mylpi->get_lesson_location();
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$objResponse->addScript(
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"score=".$myscore.";" .
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"max=".$mymax.";" .
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"min=".$mymin.";" .
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"lesson_status='".$mylesson_status."';" .
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"lesson_location='".$mylesson_location."';" .
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"session_time='".$mysession_time."';" .
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"suspend_data='".$mysuspend_data."';" .
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"lesson_location='".$mylesson_location."';" .
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"total_time = '".$mytotal_time."';" .
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"mastery_score = '".$mymastery_score."';" .
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"max_time_allowed = '".$mymax_time_allowed."';" .
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"launch_data = '".$mylaunch_data."';" .
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"interactions = new Array();" .
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"item_objectives = new Array();" .
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"G_lastError = 0;" .
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"G_LastErrorMessage = 'No error';");
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/*
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* and re-initialise the rest
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* -saved_lesson_status = 'not attempted'
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* -lms_lp_id
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* -lms_item_id
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* -lms_old_item_id
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* -lms_new_item_id
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* -lms_been_synchronized
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* -lms_initialized
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* -lms_total_lessons
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* -lms_complete_lessons
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* -lms_progress_bar_mode
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* -lms_view_id
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* -lms_user_id
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*/
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$mytotal = $mylp->get_total_items_count_without_chapters();
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$mycomplete = $mylp->get_complete_items_count();
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$myprogress_mode = $mylp->get_progress_bar_mode();
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$myprogress_mode = ($myprogress_mode == '' ? '%' : $myprogress_mode);
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$mynext = $mylp->get_next_item_id();
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$myprevious = $mylp->get_previous_item_id();
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$myitemtype = $mylpi->get_type();
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$mylesson_mode = $mylpi->get_lesson_mode();
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$mycredit = $mylpi->get_credit();
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$mylaunch_data = $mylpi->get_launch_data();
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$myinteractions_count = $mylpi->get_interactions_count();
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$myobjectives_count = $mylpi->get_objectives_count();
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$mycore_exit = $mylpi->get_core_exit();
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$objResponse->addScript(
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"saved_lesson_status='not attempted';" .
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"lms_lp_id=".$lp_id.";" .
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"lms_item_id=".$new_item_id.";" .
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"lms_old_item_id=0;" .
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"lms_been_synchronized=0;" .
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"lms_initialized=0;" .
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"lms_total_lessons=".$mytotal.";" .
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"lms_complete_lessons=".$mycomplete.";" .
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"lms_progress_bar_mod='".$myprogress_mode."';" .
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"lms_view_id=".$view_id.";" .
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"lms_user_id=".$user_id.";" .
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"next_item=".$new_item_id.";" . // This one is very important to replace possible literal strings.
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"lms_next_item=".$mynext.";" .
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"lms_previous_item=".$myprevious.";" .
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"lms_item_type = '".$myitemtype."';" .
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"lms_item_credit = '".$mycredit."';" .
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"lms_item_lesson_mode = '".$mylesson_mode."';" .
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"lms_item_launch_data = '".$mylaunch_data."';" .
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"lms_item_interactions_count = '".$myinteractions_count."';" .
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"lms_item_objectives_count = '".$myinteractions_count."';" .
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"lms_item_core_exit = '".$mycore_exit."';" .
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"asset_timer = 0;"
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);
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$objResponse->addScript("update_toc('unhighlight','".$current_item."');");
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$objResponse->addScript("update_toc('highlight','".$new_item_id."');");
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$objResponse->addScript("update_toc('$mylesson_status','".$new_item_id."');");
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$objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
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$mylp->set_error_msg('');
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$mylp->prerequisites_match(); // Check the prerequisites are all complete.
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if ($debug > 1) { error_log('Prereq_match() returned '.api_htmlentities($mylp->error, ENT_QUOTES, $charset), 0); }
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$objResponse->addScript("update_message_frame('".str_replace("'", "\'", api_htmlentities($mylp->error, ENT_QUOTES, $charset))."');");
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$_SESSION['scorm_item_id'] = $new_item_id; // Save the new item ID for the exercise tool to use.
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$_SESSION['lpobject'] = serialize($mylp);
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return $objResponse;
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}
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/**
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* Start a timer and hand it back to the JS by assigning the current time (of start) to
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* var asset_timer
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*/
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function start_timer() {
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$objResponse = new xajaxResponse();
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$time = time();
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$objResponse->addScript("asset_timer='$time';asset_timer_total=0;");
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return $objResponse;
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}
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require 'lp_comm.common.php';
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$xajax->processRequests();
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