lp_ajax_switch_item.php 9.5 KB

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