lp_ajax_switch_item.php 9.4 KB

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  1. <?php //$id$
  2. /**
  3. * This script contains the server part of the xajax interaction process. The client part is located
  4. * in lp_api.php or other api's.
  5. * This is a first attempt at using xajax and AJAX in general, so the code might be a bit unsettling.
  6. * @package dokeos.learnpath
  7. * @author Yannick Warnier <ywarnier@beeznest.org>
  8. */
  9. /**
  10. * Script
  11. */
  12. //flag to allow for anonymous user - needs to be set before global.inc.php
  13. $use_anonymous = true;
  14. // name of the language file that needs to be included
  15. $language_file[] = 'learnpath';
  16. require_once('back_compat.inc.php');
  17. /**
  18. * Get one item's details
  19. * @param integer LP ID
  20. * @param integer user ID
  21. * @param integer View ID
  22. * @param integer Current item ID
  23. * @param integer New item ID
  24. */
  25. function switch_item_details($lp_id,$user_id,$view_id,$current_item,$next_item)
  26. {
  27. $debug=0;
  28. $return = '';
  29. if($debug>0){error_log('In xajax_switch_item_details('.$lp_id.','.$user_id.','.$view_id.','.$current_item.','.$next_item.')',0);}
  30. //$objResponse = new xajaxResponse();
  31. /*$item_id may be one of:
  32. * -'next'
  33. * -'previous'
  34. * -'first'
  35. * -'last'
  36. * - a real item ID
  37. */
  38. require_once('learnpath.class.php');
  39. require_once('scorm.class.php');
  40. require_once('aicc.class.php');
  41. require_once('learnpathItem.class.php');
  42. require_once('scormItem.class.php');
  43. require_once('aiccItem.class.php');
  44. $mylp = '';
  45. if(isset($_SESSION['lpobject']))
  46. {
  47. if($debug>1){error_log('////$_SESSION[lpobject] is set',0);}
  48. $oLP =& unserialize($_SESSION['lpobject']);
  49. if(!is_object($oLP)){
  50. if($debug>1){error_log(print_r($oLP,true),0);}
  51. if($debug>2){error_log('////Building new lp',0);}
  52. unset($oLP);
  53. $code = api_get_course_id();
  54. $mylp = & new learnpath($code,$lp_id,$user_id);
  55. }else{
  56. if($debug>1){error_log('////Reusing session lp',0);}
  57. $mylp = & $oLP;
  58. }
  59. }
  60. $new_item_id = 0;
  61. switch($next_item){
  62. case 'next':
  63. $mylp->set_current_item($current_item);
  64. $mylp->next();
  65. $new_item_id = $mylp->get_current_item_id();
  66. if($debug>1){error_log('In {next} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
  67. break;
  68. case 'previous':
  69. $mylp->set_current_item($current_item);
  70. $mylp->previous();
  71. $new_item_id = $mylp->get_current_item_id();
  72. if($debug>1){error_log('In {previous} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
  73. break;
  74. case 'first':
  75. $mylp->set_current_item($current_item);
  76. $mylp->first();
  77. $new_item_id = $mylp->get_current_item_id();
  78. if($debug>1){error_log('In {first} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
  79. break;
  80. case 'last':
  81. break;
  82. default:
  83. //should be filtered to check it's not hacked
  84. if($next_item == $current_item){
  85. //if we're opening the same item again
  86. $mylp->items[$current_item]->restart();
  87. }
  88. $new_item_id = $next_item;
  89. $mylp->set_current_item($new_item_id);
  90. if($debug>1){error_log('In {default} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
  91. break;
  92. }
  93. $mylp->start_current_item(true);
  94. if($mylp->force_commit){
  95. $mylp->save_current();
  96. }
  97. //$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
  98. if(is_object($mylp->items[$new_item_id])){
  99. $mylpi = & $mylp->items[$new_item_id];
  100. }else{
  101. if($debug>1){error_log('In switch_item_details - generating new item object',0);}
  102. $mylpi =& new learnpathItem($new_item_id,$user_id);
  103. $mylpi->set_lp_view($view_id);
  104. }
  105. /*
  106. * now get what's needed by the SCORM API:
  107. * -score
  108. * -max
  109. * -min
  110. * -lesson_status
  111. * -session_time
  112. * -suspend_data
  113. */
  114. $myscore = $mylpi->get_score();
  115. $mymax = $mylpi->get_max();
  116. if($mymax===''){$mymax="''";}
  117. $mymin = $mylpi->get_min();
  118. $mylesson_status = $mylpi->get_status();
  119. $mylesson_location = $mylpi->get_lesson_location();
  120. $mytotal_time = $mylpi->get_scorm_time('js');
  121. $mymastery_score = $mylpi->get_mastery_score();
  122. $mymax_time_allowed = $mylpi->get_max_time_allowed();
  123. $mylaunch_data = $mylpi->get_launch_data();
  124. /*
  125. if($mylpi->get_type() == 'asset'){
  126. //temporary measure to save completion of an asset. Later on, Dokeos should trigger something on unload, maybe... (even though that would mean the last item cannot be completed)
  127. $mylesson_status = 'completed';
  128. $mylpi->set_status('completed');
  129. $mylpi->save();
  130. }
  131. */
  132. $mysession_time = $mylpi->get_total_time();
  133. $mysuspend_data = $mylpi->get_suspend_data();
  134. $mylesson_location = $mylpi->get_lesson_location();
  135. $myic = $mylpi->get_interactions_count();
  136. $myistring = '';
  137. for ($i=0;$i<$myic;$i++) {
  138. $myistring .= ",[".$i.",'','','','','','','']";
  139. }
  140. if (!empty($myistring)) {
  141. $myistring = substr($myistring,1);
  142. }
  143. //$objResponse->addScript(
  144. $return .=
  145. "score=".$myscore.";" .
  146. "max=".$mymax.";" .
  147. "min=".$mymin.";" .
  148. "lesson_status='".$mylesson_status."';" .
  149. "lesson_location='".$mylesson_location."';" .
  150. "session_time='".$mysession_time."';" .
  151. "suspend_data='".$mysuspend_data."';" .
  152. "total_time = '".$mytotal_time."';" .
  153. "mastery_score = '".$mymastery_score."';" .
  154. "max_time_allowed = '".$mymax_time_allowed."';" .
  155. "launch_data = '".$mylaunch_data."';" .
  156. "interactions = new Array(".$myistring.");" .
  157. "item_objectives = new Array();" .
  158. "G_lastError = 0;" .
  159. "G_LastErrorMessage = 'No error';";
  160. //);
  161. /*
  162. * and re-initialise the rest
  163. * -saved_lesson_status = 'not attempted'
  164. * -lms_lp_id
  165. * -lms_item_id
  166. * -lms_old_item_id
  167. * -lms_new_item_id
  168. * -lms_been_synchronized
  169. * -lms_initialized
  170. * -lms_total_lessons
  171. * -lms_complete_lessons
  172. * -lms_progress_bar_mode
  173. * -lms_view_id
  174. * -lms_user_id
  175. */
  176. $mytotal = $mylp->get_total_items_count_without_chapters();
  177. $mycomplete = $mylp->get_complete_items_count();
  178. $myprogress_mode = $mylp->get_progress_bar_mode();
  179. $myprogress_mode = ($myprogress_mode==''?'%':$myprogress_mode);
  180. $mynext = $mylp->get_next_item_id();
  181. $myprevious = $mylp->get_previous_item_id();
  182. $myitemtype = $mylpi->get_type();
  183. $mylesson_mode = $mylpi->get_lesson_mode();
  184. $mycredit = $mylpi->get_credit();
  185. $mylaunch_data = $mylpi->get_launch_data();
  186. $myinteractions_count = $mylpi->get_interactions_count();
  187. $myobjectives_count = $mylpi->get_objectives_count();
  188. $mycore_exit = $mylpi->get_core_exit();
  189. //$objResponse->addScript(
  190. $return .=
  191. "saved_lesson_status='not attempted';" .
  192. "lms_lp_id=".$lp_id.";" .
  193. "lms_item_id=".$new_item_id.";" .
  194. "lms_old_item_id=0;" .
  195. "lms_been_synchronized=0;" .
  196. "lms_initialized=0;" .
  197. "lms_total_lessons=".$mytotal.";" .
  198. "lms_complete_lessons=".$mycomplete.";" .
  199. "lms_progress_bar_mod='".$myprogress_mode."';" .
  200. "lms_view_id=".$view_id.";" .
  201. "lms_user_id=".$user_id.";" .
  202. "next_item=".$new_item_id.";" . //this one is very important to replace possible literal strings
  203. "lms_next_item=".$mynext.";" .
  204. "lms_previous_item=".$myprevious.";" .
  205. "lms_item_type = '".$myitemtype."';" .
  206. "lms_item_credit = '".$mycredit."';" .
  207. "lms_item_lesson_mode = '".$mylesson_mode."';" .
  208. "lms_item_launch_data = '".$mylaunch_data."';" .
  209. "lms_item_interactions_count = '".$myinteractions_count."';" .
  210. "lms_item_objectives_count = '".$myinteractions_count."';" .
  211. "lms_item_core_exit = '".$mycore_exit."';" .
  212. "asset_timer = 0;";
  213. //);
  214. //$objResponse->addScript("update_toc('unhighlight','".$current_item."');");
  215. //$objResponse->addScript("update_toc('highlight','".$new_item_id."');");
  216. //$objResponse->addScript("update_toc('$mylesson_status','".$new_item_id."');");
  217. //$objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
  218. $return .= "update_toc('unhighlight','".$current_item."');".
  219. "update_toc('highlight','".$new_item_id."');".
  220. "update_toc('$mylesson_status','".$new_item_id."');".
  221. "update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');";
  222. $mylp->set_error_msg('');
  223. $mylp->prerequisites_match(); //check the prerequisites are all complete
  224. if($debug>1){error_log('Prereq_match() returned '.htmlentities($mylp->error),0);}
  225. //$objResponse->addScript("update_message_frame('".str_replace("'","\'",htmlentities($mylp->error))."');");
  226. $return .= "update_message_frame('".str_replace("'","\'",api_htmlentities($mylp->error, ENT_QUOTES, api_get_system_encoding()))."');";
  227. $_SESSION['scorm_item_id'] = $new_item_id;//Save the new item ID for the exercise tool to use
  228. $_SESSION['lpobject'] = serialize($mylp);
  229. return $return;
  230. //return $objResponse;
  231. }
  232. echo switch_item_details($_GET['lid'],$_GET['uid'],$_GET['vid'],$_GET['iid'],$_GET['next']);