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 // Read URL parameters telling us which question to edit.
  17 $id = optional_param('id', 0, PARAM_INT); // question id
  18 $qtype = optional_param('qtype', '', PARAM_FILE);
  19 $categoryid = optional_param('category', 0, PARAM_INT);
  20
  21 $cmid = optional_param('cmid', 0, PARAM_INT);
  22 $courseid = optional_param('courseid', 0, PARAM_INT);
  23 $wizardnow =  optional_param('wizardnow', '', PARAM_ALPHA);
  24 $movecontext =  optional_param('movecontext', 0, PARAM_BOOL);//switch to make question
  25                     //uneditable - form is displayed to edit category only
  26 $returnurl = optional_param('returnurl', 0, PARAM_LOCALURL);
  27
  28 $inpopup = optional_param('inpopup', 0, PARAM_BOOL);
  29
  30 if ($movecontext && !$id){
  31     print_error('questiondoesnotexist', 'question', $returnurl);
  32 }
  33
  34 if ($cmid){
  35     list($module, $cm) = get_module_from_cmid($cmid);
  36     require_login($cm->course, false, $cm);
  37     $thiscontext = get_context_instance(CONTEXT_MODULE, $cmid);
  38 } elseif ($courseid) {
  39     require_login($courseid, false);
  40     $thiscontext = get_context_instance(CONTEXT_COURSE, $courseid);
  41     $module = null;
  42     $cm = null;
  43 } else {
  44     error('Need to pass courseid or cmid to this script.');
  45 }
  46 $contexts = new question_edit_contexts($thiscontext);
  47
  48
  49 if (!$returnurl) {
  50     $returnurl = "{$CFG->wwwroot}/question/edit.php?courseid={$COURSE->id}";
  51 }
  52
  53
  54
  55 if ($id) {
  56     if (!$question = get_record('question', 'id', $id)) {
  57         print_error('questiondoesnotexist', 'question', $returnurl);
  58     }
  59     get_question_options($question);
  60 } else if ($categoryid && $qtype) { // only for creating new questions
  61     $question = new stdClass;
  62     $question->category = $categoryid;
  63     $question->qtype = $qtype;
  64 } else {
  65     print_error('notenoughdatatoeditaquestion', 'question', $returnurl);
  66 }
  67
  68 // Validate the question category.
  69 if (!$category = get_record('question_categories', 'id', $question->category)) {
  70     print_error('categorydoesnotexist', 'question', $returnurl);
  71 }
  72
  73 //permissions
  74 $question->formoptions = new object();
  75
  76 $categorycontext = get_context_instance_by_id($category->contextid);
  77 $addpermission = has_capability('moodle/question:add', $categorycontext);
  78
  79 if ($id) {
  80     $canview = question_has_capability_on($question, 'view');
  81     if ($movecontext){
  82         $question->formoptions->canedit = false;
  83         $question->formoptions->canmove = (question_has_capability_on($question, 'move') && $contexts->have_cap('moodle/question:add'));
  84         $question->formoptions->cansaveasnew = false;
  85         $question->formoptions->repeatelements = false;
  86         $question->formoptions->movecontext = true;
  87         $formeditable = true;
  88         question_require_capability_on($question, 'view');
  89     } else {
  90         $question->formoptions->canedit = question_has_capability_on($question, 'edit');
  91         $question->formoptions->canmove = (question_has_capability_on($question, 'move') && $addpermission);
  92         $question->formoptions->cansaveasnew = (($canview ||question_has_capability_on($question, 'edit')) && $addpermission);
  93         $question->formoptions->repeatelements = ($question->formoptions->canedit || $question->formoptions->cansaveasnew);
  94         $formeditable =  $question->formoptions->canedit || $question->formoptions->cansaveasnew || $question->formoptions->canmove;
  95         $question->formoptions->movecontext = false;
  96         if (!$formeditable){
  97             question_require_capability_on($question, 'view');
  98         }
  99     }
 100
 101
 102 } else  { // creating a new question
 103     require_capability('moodle/question:add', $categorycontext);
 104     $formeditable = true;
 105     $question->formoptions->repeatelements = true;
 106     $question->formoptions->movecontext = false;
 107 }
 108
 109
 110 // Validate the question type.
 111 if (!isset($QTYPES[$question->qtype])) {
 112     print_error('unknownquestiontype', 'question', $returnurl, $question->qtype);
 113 }
 114 $CFG->pagepath = 'question/type/' . $question->qtype;
 115
 116
 117 // Create the question editing form.
 118 if ($wizardnow!=='' && !$movecontext){
 119     if (!method_exists($QTYPES[$question->qtype], 'next_wizard_form')){
 120         print_error('missingimportantcode', 'question', $returnurl, 'wizard form definition');
 121     } else {
 122         $mform = $QTYPES[$question->qtype]->next_wizard_form('question.php', $question, $wizardnow, $formeditable);
 123     }
 124 } else {
 125     $mform = $QTYPES[$question->qtype]->create_editing_form('question.php', $question, $category, $contexts, $formeditable);
 126 }
 127 if ($mform === null) {
 128     print_error('missingimportantcode', 'question', $returnurl, 'question editing form definition for "'.$question->qtype.'"');
 129 }
 130 $toform = fullclone($question); // send the question object and a few more parameters to the form
 131 $toform->category = "$category->id,$category->contextid";
 132 if ($formeditable && $id){
 133     $toform->categorymoveto = $toform->category;
 134 }
 135 $toform->returnurl = $returnurl;
 136 $toform->movecontext = $movecontext;
 137 if ($cm !== null){
 138     $toform->cmid = $cm->id;
 139     $toform->courseid = $cm->course;
 140 } else {
 141     $toform->courseid = $COURSE->id;
 142 }
 143 $mform->set_data($toform);
 144
 145 if ($mform->is_cancelled()){
 146     redirect($returnurl);
 147 } elseif ($fromform = $mform->get_data()){
 148     $returnurl = new moodle_url($returnurl);
 149     //select category that question has been saved in / moved to when we return to question bank
 150     if (!empty($fromform->categorymoveto)){
 151         $returnurl->param('category', $fromform->categorymoveto);
 152     } else if (!empty($fromform->category)){
 153         $returnurl->param('category', $fromform->category);
 154     }
 155     $returnurl = $returnurl->out();
 156     if (!empty($fromform->makecopy)) {
 157         $question->id = 0;  // causes a new question to be created.
 158         $question->hidden = 0; // Copies should not be hidden
 159     }
 160     if ($movecontext){
 161         list($tocatid, $tocontextid) = explode(',', $fromform->categorymoveto);
 162         $tocontext = get_context_instance_by_id($tocontextid);
 163         require_capability('moodle/question:add', $tocontext);
 164         if (get_filesdir_from_context($categorycontext) != get_filesdir_from_context($tocontext)){
 165             $movecontexturl  = new moodle_url($CFG->wwwroot.'/question/contextmoveq.php',
 166                                             array('returnurl' => $returnurl,
 167                                                     'ids'=>$question->id,
 168                                                     'tocatid'=> $tocatid));
 169             if ($cmid){
 170                 $movecontexturl->param('cmid', $cmid);
 171             } else {
 172                 $movecontexturl->param('courseid', $COURSE->id);
 173             }
 174             redirect($movecontexturl->out());
 175         }
 176     }
 177
 178     $question = $QTYPES[$question->qtype]->save_question($question, $fromform, $COURSE, $wizardnow);
 179     if (($QTYPES[$question->qtype]->finished_edit_wizard($fromform)) || $movecontext){
 180         if ($inpopup) {
 181             notify(get_string('changessaved'), '');
 182             close_window(3);
 183         } else {
 184             redirect($returnurl);
 185         }
 186     } else {
 187         $nexturlparams = array('returnurl'=>$returnurl);
 188         if (isset($fromform->nextpageparam) && is_array($fromform->nextpageparam)){
 189             $nexturlparams += $fromform->nextpageparam;//useful for passing data to the next page which is not saved in the database
 190         }
 191         $nexturlparams['id'] = $question->id;
 192         $nexturlparams['wizardnow'] = $fromform->wizard;
 193         $nexturl = new moodle_url('question.php', $nexturlparams);
 194         if ($cmid){
 195             $nexturl->param('cmid', $cmid);
 196         } else {
 197             $nexturl->param('courseid', $COURSE->id);
 198         }
 199         redirect($nexturl->out());
 200     }
 201 } else {
 202
 203     list($streditingquestion,) = $QTYPES[$question->qtype]->get_heading();
 204     if ($cm !== null) {
 205         $strupdatemodule = has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_COURSE, $COURSE->id))
 206             ? update_module_button($cm->id, $cm->course, get_string('modulename', $cm->modname))
 207             : "";
 208         $navlinks = array();
 209         $navlinks[] = array('name' => get_string('modulenameplural', $cm->modname), 'link' => "$CFG->wwwroot/mod/{$cm->modname}/index.php?id=$cm->course", 'type' => 'activity');
 210         $navlinks[] = array('name' => format_string($module->name), 'link' => "$CFG->wwwroot/mod/{$cm->modname}/view.php?id={$cm->id}", 'type' => 'title');
 211         $navlinks[] = array('name' => get_string('editingquiz', 'quiz'), 'link' => $returnurl, 'type' => 'title');
 212         $navlinks[] = array('name' => $streditingquestion, 'link' => '', 'type' => 'title');
 213         $navigation = build_navigation($navlinks);
 214         print_header_simple($streditingquestion, '', $navigation, "", "", true, $strupdatemodule);
 215
 216     } else {
 217         $navlinks = array();
 218         $navlinks[] = array('name' => get_string('editquestions', "quiz"), 'link' => $returnurl, 'type' => 'title');
 219         $navlinks[] = array('name' => $streditingquestion, 'link' => '', 'type' => 'title');
 220         $strediting = '<a href="edit.php?courseid='.$COURSE->id.'">'.
 221                 get_string("editquestions", "quiz").'</a> -> '.$streditingquestion;
 222         $navigation = build_navigation($navlinks);
 223         print_header_simple($streditingquestion, '', $navigation);
 224     }
 225
 226
 227     // Display a heading, question editing form and possibly some extra content needed for
 228     // for this question type.
 229     $QTYPES[$question->qtype]->display_question_editing_page($mform, $question, $wizardnow);
 230     print_footer($COURSE);
 231 }
 232 ?>