question/question.php

   1 <?php // $Id$
   2 /**
   3  * Page for editing questions using the new form library.
   4  *
   5  * @author T.J.Hunt@open.ac.uk
   6  * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
   7  * @package questionbank
   8  *//** */
   9
  10 // Includes.
  11 require_once(dirname(__FILE__) . '/../config.php');
  12 require_once(dirname(__FILE__) . '/editlib.php');
  13 require_once($CFG->libdir . '/filelib.php');
  14 require_once($CFG->libdir . '/formslib.php');
  15
  16 $returnurl = optional_param('returnurl', 0, PARAM_LOCALURL);
  17
  18 // Read URL parameters telling us which question to edit.
  19 $id = optional_param('id', 0, PARAM_INT); // question id
  20 $cmid = optional_param('cmid', 0, PARAM_INT);
  21 $qtype = optional_param('qtype', '', PARAM_FILE);
  22 $categoryid = optional_param('category', 0, PARAM_INT);
  23 $wizardnow =  optional_param('wizardnow', '', PARAM_ALPHA);
  24
  25 if ($cmid){
  26     list($module, $cm) = get_module_from_cmid($cmid);
  27 } else {
  28     $module = null;
  29     $cm = null;
  30 }
  31
  32 // Validate the URL parameters.
  33 if ($id) {
  34     if (!$question = get_record('question', 'id', $id)) {
  35         print_error('questiondoesnotexist', 'question', $returnurl);
  36     }
  37     get_question_options($question);
  38 } else if ($categoryid && $qtype) { // only for creating new questions
  39     $question = new stdClass;
  40     $question->category = $categoryid;
  41     $question->qtype = $qtype;
  42 } else {
  43     print_error('notenoughdatatoeditaquestion', 'question', $returnurl);
  44 }
  45
  46 // Validate the question category.
  47 if (!$category = get_record('question_categories', 'id', $question->category)) {
  48     print_error('categorydoesnotexist', 'question', $returnurl);
  49 }
  50 if (!$returnurl) {
  51     $returnurl = "{$CFG->wwwroot}/question/edit.php?courseid={$category->course}";
  52 }
  53
  54 // Validate the question type.
  55 if (!isset($QTYPES[$question->qtype])) {
  56     print_error('unknownquestiontype', 'question', $returnurl, $question->qtype);
  57 }
  58 $CFG->pagepath = 'question/type/' . $question->qtype;
  59
  60 // Check the user is logged in and has enough premissions.
  61 require_login($category->course, false);
  62 $coursecontext = get_context_instance(CONTEXT_COURSE, $category->course);
  63 require_capability('moodle/question:manage', $coursecontext);
  64
  65 // Create the question editing form.
  66 if ($wizardnow!==''){
  67     if (!method_exists($QTYPES[$question->qtype], 'next_wizard_form')){
  68         print_error('missingimportantcode', 'question', $returnurl, 'wizard form definition');
  69     } else {
  70         $mform = $QTYPES[$question->qtype]->next_wizard_form('question.php', $question, $wizardnow);
  71     }
  72 } else {
  73     $mform = $QTYPES[$question->qtype]->create_editing_form('question.php', $question);
  74 }
  75
  76 if ($mform === null) {
  77     print_error('missingimportantcode', 'question', $returnurl, 'question editing form definition for "'.$question->qtype.'"');
  78 }
  79 $toform = $question; // send the question object and a few more parameters to the form
  80 $toform->returnurl = $returnurl;
  81 if ($cm !== null){
  82     $toform->cmid = $cm->id;
  83 }
  84 $mform->set_data($toform);
  85
  86 if ($mform->is_cancelled()){
  87     redirect($returnurl);
  88 } elseif ($data = $mform->get_data()){
  89     if (!empty($data->makecopy)) {
  90         $question->id = 0;  // causes a new question to be created.
  91         $question->hidden = 0; // Copies should not be hidden
  92     }
  93     $question = $QTYPES[$question->qtype]->save_question($question, $data, $COURSE, $wizardnow);
  94     if ($QTYPES[$qtype]->finished_edit_wizard($data)){
  95         if (optional_param('inpopup', 0, PARAM_BOOL)) {
  96             notify(get_string('changessaved'), '');
  97             close_window(3);
  98         } else {
  99             redirect($returnurl);
 100         }
 101         die;
 102     } else {
 103         //useful for passing data to the next page which is not saved in the database
 104         $queryappend = '';
 105         if (isset($data->nextpageparam)){
 106             foreach ($data->nextpageparam as $key => $param){
 107                 $queryappend .= "&".urlencode($key).'='.urlencode($param);
 108             }
 109         }
 110         if ($question->id) {
 111             $nexturl = "question.php?id=$question->id&returnurl=" . urlencode($returnurl);
 112         } else { // only for creating new questions
 113             $nexturl = "question.php?category=$question->category&qtype=$question->qtype&returnurl=".urlencode($returnurl);
 114         }
 115         redirect($nexturl.'&wizardnow='.$data->wizard.$queryappend, '', 20);
 116     }
 117 } else {
 118
 119     list($streditingquestion,) = $QTYPES[$question->qtype]->get_heading();
 120     if ($cm !== null) {
 121         $strupdatemodule = has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_COURSE, $category->course))
 122             ? update_module_button($cm->id, $category->course, get_string('modulename', $cm->modname))
 123             : "";
 124         $navlinks = array();
 125         $navlinks[] = array('name' => get_string('modulenameplural', $cm->modname), 'link' => "$CFG->wwwroot/mod/{$cm->modname}/index.php?id=$category->course", 'type' => 'activity');
 126         $navlinks[] = array('name' => format_string($module->name), 'link' => "$CFG->wwwroot/mod/{$cm->modname}/view.php?cmid={$cm->id}", 'type' => 'title');
 127         $navlinks[] = array('name' => get_string('editingquiz', 'quiz'), 'link' => $returnurl, 'type' => 'title');
 128         $navlinks[] = array('name' => $streditingquestion, 'link' => '', 'type' => 'title');
 129         $navigation = build_navigation($navlinks);
 130         print_header_simple($streditingquestion, '', $navigation, "", "", true, $strupdatemodule);
 131
 132     } else {
 133         $navlinks = array();
 134         $navlinks[] = array('name' => get_string('editquestions', "quiz"), 'link' => $returnurl, 'type' => 'title');
 135         $navlinks[] = array('name' => $streditingquestion, 'link' => '', 'type' => 'title');
 136         $strediting = '<a href="edit.php?courseid='.$category->course.'">'.
 137                 get_string("editquestions", "quiz").'</a> -> '.$streditingquestion;
 138         $navigation = build_navigation($navlinks);
 139         print_header_simple($streditingquestion, '', $navigation);
 140     }
 141
 142     // Display a heading, question editing form and possibly some extra content needed for
 143     // for this question type.
 144     $QTYPES[$question->qtype]->display_question_editing_page($mform, $question, $wizardnow);
 145
 146     print_footer($COURSE);
 147 }
 148 ?>