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237 lines
10 KiB
237 lines
10 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* API event handler functions for AICC / CMIv4 in HACP communication mode
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*
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* @author Denes Nagy <darkden@freemail.hu>
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* @author Yannick Warnier <ywarnier@beeznest.org>
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* @version v 1.0
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* @access public
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* @package chamilo.learnpath
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* @license GNU/GPL
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*/
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/**
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* This script is divided into three sections.
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* The first section (below) is the initialisation part.
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* The second section is the AICC object part
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* The third section defines the event handlers for Chamilo's internal messaging
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* and frames refresh
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*
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* This script implements the HACP messaging for AICC. The API messaging is
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* made by another set of scripts.
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*
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* Rules for HACP processing of one AU
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* Rule #1 The first HACP message issued must be a GetParam
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* Rule #2 The last HACP message issued must be an ExitAU
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* Rule #3 At least one PutParam message must be issued prior to an ExitAU message
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* Rule #4 No HACP messages can be issued after a successfully issued ExitAU message
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*
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* Only suspend_data and core.lesson_location should be sent updated to a late GetParam
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* request. All other params should be as when the AU was launched.
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*/
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/* INIT SECTION */
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$debug = 0;
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// Flag to allow for anonymous user - needs to be set before global.inc.php.
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$use_anonymous = true;
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// Use session ID as provided by the request.
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if (!empty($_REQUEST['aicc_sid'])) {
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session_id($_REQUEST['aicc_sid']);
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if ($debug > 1) { error_log('New LP - '.__FILE__.','.__LINE__.' - reusing session ID '.$_REQUEST['aicc_sid'], 0); }
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}
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//Load common libraries using a compatibility script to bridge between 1.6 and 1.8.
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require_once 'back_compat.inc.php';
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if ($debug > 2) { error_log('New LP - '.__FILE__.','.__LINE__.' - Current session ID: '.session_id(), 0); }
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//Load learning path libraries so we can use the objects to define the initial values of the API.
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require_once 'learnpath.class.php';
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require_once 'learnpathItem.class.php';
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require_once 'aicc.class.php';
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// Is this needed? This is probabaly done in the header file.
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//$_user = $_SESSION['_user'];
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$file = $_SESSION['file'];
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$oLP = unserialize($_SESSION['lpobject']);
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$oItem =& $oLP->items[$oLP->current];
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if (!is_object($oItem)) {
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error_log('New LP - aicc_hacp - Could not load oItem item', 0);
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exit;
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}
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$autocomplete_when_80pct = 0;
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$result = array(
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'core' => array(),
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'core_lesson' => array(),
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'core_vendor' => array(),
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'evaluation' => array(),
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'student_data' => array(),
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);
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$convert_enc = array('%25','%0D','%0A','%09','%20','%2D','%2F','%3B','%3F','%7B','%7D','%7C','%5C','%5E','%7E','%5B','%5D','%60','%23','%3E','%3C','%22');
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$convert_dec = array('%',"\r","\n","\t",' ','-','/',';','?','{','}','|','\\','^','~','[',']','`','#','>','<','"');
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$crlf = "\r\n";
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$tab = "\t";
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$s_ec = 'error='; //string for error code
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$s_et = 'error_text='; //string for error text
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$s_ad = 'aicc_data='; //string for aicc_data
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$errors = array(0 => 'Successful', 1 => 'Invalid Command', 2 => 'Invalid AU password', 3 => 'Invalid Session ID');
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$error_code = 0;
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$error_text = '';
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$aicc_data = '';
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$result = '';
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// Get REQUEST
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if (!empty($_REQUEST['command'])) {
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//error_log('In '.__FILE__.', '.__LINE__.' - request is '.$_REQUEST['command'], 0);
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switch (strtolower($_REQUEST['command'])) {
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case 'getparam':
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// Request for all available data to be printed out in the answer.
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if (!empty($_REQUEST['version'])) {
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$hacp_version = learnpath::escape_string($_REQUEST['version']);
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}
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if (!empty($_REQUEST['session_id'])) {
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$hacp_session_id = learnpath::escape_string($_REQUEST['session_id']);
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}
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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$result .= '[Core]'.$crlf;
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$result .= $tab.'Student_ID='.$_user['user_id'].$crlf;
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$result .= $tab.'Student_Name='.api_get_person_name($_user['firstName'], $_user['lastName']).$crlf;
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$result .= $tab.'Lesson_Location='.$oItem->get_lesson_location().$crlf;
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$result .= $tab.'Credit='.$oItem->get_credit().$crlf;
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$result .= $tab.'Lesson_Status='.$oItem->get_status().$crlf;
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$result .= $tab.'Score='.$oItem->get_score().$crlf;
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$result .= $tab.'Time='.$oItem->get_scorm_time('js').$crlf;
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$result .= $tab.'Lesson_Mode='.$oItem->get_lesson_mode().$crlf;
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$result .= '[Core_Lesson]'.$crlf;
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$result .= $oItem->get_suspend_data().$crlf;
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$result .= '[Core_Vendor]'.$crlf;
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$result .= $oItem->get_launch_data.$crlf;
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$result .= '[Comments]'.$crlf;
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$result .= $crlf;
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$result .= '[Evaluation]'.$crlf;
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$result .= $tab.'Course_ID={'.api_get_course_id().'}'.$crlf;
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//$result .= '[Objectives_Status]'.$crlf;
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$result .= '[Student_Data]'.$crlf;
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$result .= $tab.'Mastery_Score='.$oItem->masteryscore.$crlf;
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//$result .= '[Student_Demographics]'.$crlf;
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//$result .= '[Student_Preferences]'.$crlf;
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//error_log('Returning message: '.$result,0);
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$result = str_replace($convert_dec, $convert_enc, $result);
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//error_log('Returning message (encoded): '.$result,0);
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break;
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case 'putparam':
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$hacp_version = '';
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$hacp_session_id = '';
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$hacp_aicc_data = '';
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foreach ($_REQUEST as $name => $value) {
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//escape the value as described in the AICC documentation p170
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switch (strtolower($name)) {
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case 'version':
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$hacp_version = $value;
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break;
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case 'session_id':
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$hacp_session_id = $value;
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break;
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case 'aicc_data':
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//error_log('In '.__FILE__.', '.__LINE__.' - aicc data before translation is '.$value, 0);
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$value = str_replace('+', ' ', $value);
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$value = str_replace($convert_enc, $convert_dec, $value);
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$hacp_aicc_data = $value;
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break;
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}
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}
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//error_log('In '.__FILE__.', '.__LINE__.' - aicc data is '.$hacp_aicc_data, 0);
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// Treat the incoming request:
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$msg_array = aicc::parse_ini_string_quotes_safe($hacp_aicc_data, array('core_lesson', 'core_vendor'));
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//error_log('Message is now in this form: '.print_r($msg_array, true), 0);
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foreach ($msg_array as $key => $dummy) {
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switch (strtolower($key)) {
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case 'core':
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foreach ($msg_array[$key] as $subkey => $value){
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switch (strtolower($subkey)) {
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case 'lesson_location':
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//error_log('Setting lesson_location to '.$value, 0);
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$oItem->set_lesson_location($value);
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break;
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case 'lesson_status':
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//error_log('Setting lesson_status to '.$value, 0);
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$oItem->set_status($value);
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break;
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case 'score':
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//error_log('Setting lesson_score to '.$value, 0);
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$oItem->set_score($value);
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break;
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case 'time':
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//error_log('Setting lesson_time to '.$value, 0);
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$oItem->set_time($value);
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break;
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}
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}
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break;
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case 'core_lesson':
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//error_log('Setting suspend_data to '.print_r($msg_array[$key], true), 0);
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$oItem->current_data = $msg_array[$key];
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break;
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case 'comments':
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break;
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case 'objectives_status':
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break;
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case 'student_data':
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break;
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case 'student_preferences':
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break;
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}
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}
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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$oItem->save(false);
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break;
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case 'putcomments':
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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break;
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case 'putobjectives':
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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break;
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case 'putpath':
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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break;
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case 'putinteractions':
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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break;
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case 'putperformance':
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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break;
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case 'exitau':
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$error_code = 0;
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$error_text = $errors[$error_code];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf.$s_ad.$crlf;
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break;
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default:
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$error_code = 1;
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$error_text = $errors[1];
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$result = $s_ec.$error_code.$crlf.$s_et.$error_text.$crlf;
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}
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}
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$_SESSION['lpobject'] = serialize($oLP);
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// Content type must be text/plain.
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header('Content-type: text/plain');
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echo $result;
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