lp_ajax_initialize.php 7.5 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 script, in particular, enables the process of SCO's initialization. It
  7. * resets the JavaScript values for each SCO to the current LMS status.
  8. * @package chamilo.learnpath
  9. * @author Yannick Warnier <ywarnier@beeznest.org>
  10. */
  11. /**
  12. * Code
  13. */
  14. // Flag to allow for anonymous user - needs to be set before global.inc.php.
  15. $use_anonymous = true;
  16. // Name of the language file that needs to be included.
  17. $language_file[] = 'learnpath';
  18. require_once 'back_compat.inc.php';
  19. /**
  20. * Get one item's details
  21. * @param integer LP ID
  22. * @param integer user ID
  23. * @param integer View ID
  24. * @param integer Current item ID
  25. * @param integer New item ID
  26. */
  27. function initialize_item($lp_id, $user_id, $view_id, $next_item) {
  28. $debug = 0;
  29. $return = '';
  30. if ($debug > 0) { error_log('In initialize_item('.$lp_id.','.$user_id.','.$view_id.','.$next_item.')', 0); }
  31. //$objResponse = new xajaxResponse();
  32. /*$item_id may be one of:
  33. * -'next'
  34. * -'previous'
  35. * -'first'
  36. * -'last'
  37. * - a real item ID
  38. */
  39. require_once 'learnpath.class.php';
  40. require_once 'scorm.class.php';
  41. require_once 'aicc.class.php';
  42. require_once 'learnpathItem.class.php';
  43. require_once 'scormItem.class.php';
  44. require_once 'aiccItem.class.php';
  45. $mylp = '';
  46. if (isset($_SESSION['lpobject'])) {
  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. $mylp->set_current_item($next_item);
  61. if ($debug > 1) { error_log('In initialize_item() - new item is '.$next_item, 0); }
  62. $mylp->start_current_item(true);
  63. /*
  64. if ($mylp->force_commit) {
  65. $mylp->save_current();
  66. }
  67. */
  68. //$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
  69. if (is_object($mylp->items[$next_item])) {
  70. if ($debug > 1) { error_log('In initialize_item - recovering existing item object '.$next_item, 0); }
  71. $mylpi = & $mylp->items[$next_item];
  72. } else {
  73. if ($debug > 1) { error_log('In initialize_item - generating new item object '.$next_item, 0); }
  74. $mylpi = new learnpathItem($next_item, $user_id);
  75. $mylpi->set_lp_view($view_id);
  76. }
  77. /*
  78. * now get what's needed by the SCORM API:
  79. * -score
  80. * -max
  81. * -min
  82. * -lesson_status
  83. * -session_time
  84. * -suspend_data
  85. */
  86. $myscore = $mylpi->get_score();
  87. $mymax = $mylpi->get_max();
  88. if ($mymax === '') { $mymax = "''"; }
  89. $mymin = $mylpi->get_min();
  90. $mylesson_status = $mylpi->get_status();
  91. $mylesson_location = $mylpi->get_lesson_location();
  92. $mytotal_time = $mylpi->get_scorm_time('js', null, true);
  93. $mymastery_score = $mylpi->get_mastery_score();
  94. $mymax_time_allowed = $mylpi->get_max_time_allowed();
  95. $mylaunch_data = $mylpi->get_launch_data();
  96. $mysession_time = $mylpi->get_total_time();
  97. $mysuspend_data = $mylpi->get_suspend_data();
  98. $mylesson_location = $mylpi->get_lesson_location();
  99. $myic = $mylpi->get_interactions_count();
  100. $myistring = '';
  101. for ($i = 0; $i < $myic; $i++) {
  102. $myistring .= ",[".$i.",'','','','','','','']";
  103. }
  104. if (!empty($myistring)) {
  105. $myistring = substr($myistring, 1);
  106. }
  107. // Obtention des donnees d'objectifs
  108. $phpobjectives = array();
  109. $mycoursedb = Database::get_course_table(TABLE_LP_IV_OBJECTIVE);
  110. $course_id = api_get_course_int_id();
  111. $mylp_iv_id = $mylpi->db_item_view_id;
  112. $sql = "SELECT objective_id, status, score_raw, score_max, score_min
  113. FROM ".$mycoursedb."
  114. WHERE lp_iv_id = ".$mylp_iv_id." AND c_id = $course_id
  115. ORDER BY id ASC;";
  116. $res = Database::query($sql);
  117. while ($row = Database::fetch_row($res)) {
  118. $phpobjectives[] = $row;
  119. }
  120. $myobjectives = json_encode($phpobjectives);
  121. $return .=
  122. "olms.score=".$myscore.";" .
  123. "olms.max=".$mymax.";" .
  124. "olms.min=".$mymin.";" .
  125. "olms.lesson_status='".$mylesson_status."';" .
  126. "olms.lesson_location='".$mylesson_location."';" .
  127. "olms.session_time='".$mysession_time."';" .
  128. "olms.suspend_data='".$mysuspend_data."';" .
  129. "olms.total_time = '".$mytotal_time."';" .
  130. "olms.mastery_score = '".$mymastery_score."';" .
  131. "olms.max_time_allowed = '".$mymax_time_allowed."';" .
  132. "olms.launch_data = '".$mylaunch_data."';" .
  133. "olms.interactions = new Array(".$myistring.");" .
  134. //"olms.item_objectives = new Array();" .
  135. "olms.item_objectives = ".$myobjectives.";" .
  136. "olms.G_lastError = 0;" .
  137. "olms.G_LastErrorMessage = 'No error';" ;
  138. /*
  139. * and re-initialise the rest (proper to the LMS)
  140. * -lms_lp_id
  141. * -lms_item_id
  142. * -lms_old_item_id
  143. * -lms_new_item_id
  144. * -lms_initialized
  145. * -lms_progress_bar_mode
  146. * -lms_view_id
  147. * -lms_user_id
  148. */
  149. $mytotal = $mylp->get_total_items_count_without_chapters();
  150. $mycomplete = $mylp->get_complete_items_count();
  151. $myprogress_mode = $mylp->get_progress_bar_mode();
  152. $myprogress_mode = ($myprogress_mode == '' ? '%' : $myprogress_mode);
  153. $mynext = $mylp->get_next_item_id();
  154. $myprevious = $mylp->get_previous_item_id();
  155. $myitemtype = $mylpi->get_type();
  156. $mylesson_mode = $mylpi->get_lesson_mode();
  157. $mycredit = $mylpi->get_credit();
  158. $mylaunch_data = $mylpi->get_launch_data();
  159. $myinteractions_count = $mylpi->get_interactions_count();
  160. $myobjectives_count = $mylpi->get_objectives_count();
  161. $mycore_exit = $mylpi->get_core_exit();
  162. $return .=
  163. "olms.lms_lp_id=".$lp_id.";" .
  164. "olms.lms_item_id=".$next_item.";" .
  165. "olms.lms_old_item_id=0;" .
  166. "olms.lms_initialized=0;" .
  167. "olms.lms_view_id=".$view_id.";" .
  168. "olms.lms_user_id=".$user_id.";" .
  169. "olms.next_item=".$next_item.";" . // This one is very important to replace possible literal strings.
  170. "olms.lms_next_item=".$mynext.";" .
  171. "olms.lms_previous_item=".$myprevious.";" .
  172. "olms.lms_item_type = '".$myitemtype."';" .
  173. "olms.lms_item_credit = '".$mycredit."';" .
  174. "olms.lms_item_lesson_mode = '".$mylesson_mode."';" .
  175. "olms.lms_item_launch_data = '".$mylaunch_data."';" .
  176. "olms.lms_item_interactions_count = '".$myinteractions_count."';" .
  177. "olms.lms_item_objectives_count = '".$myinteractions_count."';" .
  178. "olms.lms_item_core_exit = '".$mycore_exit."';" .
  179. "olms.asset_timer = 0;";
  180. $mylp->set_error_msg('');
  181. $mylp->prerequisites_match(); // Check the prerequisites are all complete.
  182. if ($debug > 1) { error_log('Prereq_match() returned '.htmlentities($mylp->error), 0); }
  183. //$_SESSION['scorm_item_id'] = $new_item_id; // Save the new item ID for the exercise tool to use/
  184. //$_SESSION['lpobject'] = serialize($mylp);
  185. return $return;
  186. }
  187. echo initialize_item($_POST['lid'], $_POST['uid'], $_POST['vid'], $_POST['iid']);