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Differences Between: [Versions 39 and 311]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Page for editing questions.
  19   *
  20   * @package    moodlecore
  21   * @subpackage questionbank
  22   * @copyright  1999 onwards Martin Dougiamas {@link http://moodle.com}
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  
  27  require_once(__DIR__ . '/../config.php');
  28  require_once (__DIR__ . '/editlib.php');
  29  require_once($CFG->libdir . '/filelib.php');
  30  require_once($CFG->libdir . '/formslib.php');
  31  
  32  // Read URL parameters telling us which question to edit.
  33  $id = optional_param('id', 0, PARAM_INT); // question id
  34  $makecopy = optional_param('makecopy', 0, PARAM_BOOL);
  35  $qtype = optional_param('qtype', '', PARAM_COMPONENT);
  36  $categoryid = optional_param('category', 0, PARAM_INT);
  37  $cmid = optional_param('cmid', 0, PARAM_INT);
  38  $courseid = optional_param('courseid', 0, PARAM_INT);
  39  $wizardnow = optional_param('wizardnow', '', PARAM_ALPHA);
  40  $originalreturnurl = optional_param('returnurl', 0, PARAM_LOCALURL);
  41  $appendqnumstring = optional_param('appendqnumstring', '', PARAM_ALPHA);
  42  $inpopup = optional_param('inpopup', 0, PARAM_BOOL);
  43  $scrollpos = optional_param('scrollpos', 0, PARAM_INT);
  44  
  45  $url = new moodle_url('/question/question.php');
  46  if ($id !== 0) {
  47      $url->param('id', $id);
  48  }
  49  if ($makecopy) {
  50      $url->param('makecopy', $makecopy);
  51  }
  52  if ($qtype !== '') {
  53      $url->param('qtype', $qtype);
  54  }
  55  if ($categoryid !== 0) {
  56      $url->param('category', $categoryid);
  57  }
  58  if ($cmid !== 0) {
  59      $url->param('cmid', $cmid);
  60  }
  61  if ($courseid !== 0) {
  62      $url->param('courseid', $courseid);
  63  }
  64  if ($wizardnow !== '') {
  65      $url->param('wizardnow', $wizardnow);
  66  }
  67  if ($originalreturnurl !== 0) {
  68      $url->param('returnurl', $originalreturnurl);
  69  }
  70  if ($appendqnumstring !== '') {
  71      $url->param('appendqnumstring', $appendqnumstring);
  72  }
  73  if ($inpopup !== 0) {
  74      $url->param('inpopup', $inpopup);
  75  }
  76  if ($scrollpos) {
  77      $url->param('scrollpos', $scrollpos);
  78  }
  79  $PAGE->set_url($url);
  80  
  81  if ($cmid) {
  82      $questionbankurl = new moodle_url('/question/edit.php', array('cmid' => $cmid));
  83  } else {
  84      $questionbankurl = new moodle_url('/question/edit.php', array('courseid' => $courseid));
  85  }
  86  navigation_node::override_active_url($questionbankurl);
  87  
  88  if ($originalreturnurl) {
  89      if (strpos($originalreturnurl, '/') !== 0) {
  90          throw new coding_exception("returnurl must be a local URL starting with '/'. $originalreturnurl was given.");
  91      }
  92      $returnurl = new moodle_url($originalreturnurl);
  93  } else {
  94      $returnurl = $questionbankurl;
  95  }
  96  if ($scrollpos) {
  97      $returnurl->param('scrollpos', $scrollpos);
  98  }
  99  
 100  if ($cmid){
 101      list($module, $cm) = get_module_from_cmid($cmid);
 102      require_login($cm->course, false, $cm);
 103      $thiscontext = context_module::instance($cmid);
 104  } elseif ($courseid) {
 105      require_login($courseid, false);
 106      $thiscontext = context_course::instance($courseid);
 107      $module = null;
 108      $cm = null;
 109  } else {
 110      print_error('missingcourseorcmid', 'question');
 111  }
 112  $contexts = new question_edit_contexts($thiscontext);
 113  $PAGE->set_pagelayout('admin');
 114  
 115  if (optional_param('addcancel', false, PARAM_BOOL)) {
 116      redirect($returnurl);
 117  }
 118  
 119  if ($id) {
 120      if (!$question = $DB->get_record('question', array('id' => $id))) {
 121          print_error('questiondoesnotexist', 'question', $returnurl);
 122      }
 123      // We can use $COURSE here because it's been initialised as part of the
 124      // require_login above. Passing it as the third parameter tells the function
 125      // to filter the course tags by that course.
 126      get_question_options($question, true, [$COURSE]);
 127  
 128  } else if ($categoryid && $qtype) { // only for creating new questions
 129      $question = new stdClass();
 130      $question->category = $categoryid;
 131      $question->qtype = $qtype;
 132      $question->createdby = $USER->id;
 133  
 134      // Check that users are allowed to create this question type at the moment.
 135      if (!question_bank::qtype_enabled($qtype)) {
 136          print_error('cannotenable', 'question', $returnurl, $qtype);
 137      }
 138  
 139  } else if ($categoryid) {
 140      // Category, but no qtype. They probably came from the addquestion.php
 141      // script without choosing a question type. Send them back.
 142      $addurl = new moodle_url('/question/addquestion.php', $url->params());
 143      $addurl->param('validationerror', 1);
 144      redirect($addurl);
 145  
 146  } else {
 147      print_error('notenoughdatatoeditaquestion', 'question', $returnurl);
 148  }
 149  
 150  $qtypeobj = question_bank::get_qtype($question->qtype);
 151  
 152  if (isset($question->categoryobject)) {
 153      $category = $question->categoryobject;
 154  } else {
 155      // Validate the question category.
 156      if (!$category = $DB->get_record('question_categories', array('id' => $question->category))) {
 157          print_error('categorydoesnotexist', 'question', $returnurl);
 158      }
 159  }
 160  
 161  // Check permissions
 162  $question->formoptions = new stdClass();
 163  
 164  $categorycontext = context::instance_by_id($category->contextid);
 165  $question->contextid = $category->contextid;
 166  $addpermission = has_capability('moodle/question:add', $categorycontext);
 167  
 168  if ($id) {
 169      $question->formoptions->canedit = question_has_capability_on($question, 'edit');
 170      $question->formoptions->canmove = $addpermission && question_has_capability_on($question, 'move');
 171      $question->formoptions->cansaveasnew = $addpermission &&
 172              (question_has_capability_on($question, 'view') || $question->formoptions->canedit);
 173      $question->formoptions->repeatelements = $question->formoptions->canedit || $question->formoptions->cansaveasnew;
 174      $formeditable =  $question->formoptions->canedit || $question->formoptions->cansaveasnew || $question->formoptions->canmove;
 175      if (!$formeditable) {
 176          question_require_capability_on($question, 'view');
 177      }
 178      if ($makecopy) {
 179          // If we are duplicating a question, add some indication to the question name.
 180          $question->name = get_string('questionnamecopy', 'question', $question->name);
 181          $question->idnumber = core_question_find_next_unused_idnumber($question->idnumber, $category->id);
 182          $question->beingcopied = true;
 183      }
 184  
 185  } else  { // creating a new question
 186      $question->formoptions->canedit = question_has_capability_on($question, 'edit');
 187      $question->formoptions->canmove = (question_has_capability_on($question, 'move') && $addpermission);
 188      $question->formoptions->cansaveasnew = false;
 189      $question->formoptions->repeatelements = true;
 190      $formeditable = true;
 191      require_capability('moodle/question:add', $categorycontext);
 192  }
 193  $question->formoptions->mustbeusable = (bool) $appendqnumstring;
 194  
 195  // Validate the question type.
 196  $PAGE->set_pagetype('question-type-' . $question->qtype);
 197  
 198  // Create the question editing form.
 199  if ($wizardnow !== '') {
 200      $mform = $qtypeobj->next_wizard_form('question.php', $question, $wizardnow, $formeditable);
 201  } else {
 202      $mform = $qtypeobj->create_editing_form('question.php', $question, $category, $contexts, $formeditable);
 203  }
 204  $toform = fullclone($question); // send the question object and a few more parameters to the form
 205  $toform->category = "{$category->id},{$category->contextid}";
 206  $toform->scrollpos = $scrollpos;
 207  if ($formeditable && $id){
 208      $toform->categorymoveto = $toform->category;
 209  }
 210  
 211  $toform->appendqnumstring = $appendqnumstring;
 212  $toform->returnurl = $originalreturnurl;
 213  $toform->makecopy = $makecopy;
 214  if ($cm !== null){
 215      $toform->cmid = $cm->id;
 216      $toform->courseid = $cm->course;
 217  } else {
 218      $toform->courseid = $COURSE->id;
 219  }
 220  
 221  $toform->inpopup = $inpopup;
 222  
 223  $mform->set_data($toform);
 224  
 225  if ($mform->is_cancelled()) {
 226      if ($inpopup) {
 227          close_window();
 228      } else {
 229          redirect($returnurl);
 230      }
 231  
 232  } else if ($fromform = $mform->get_data()) {
 233      // If we are saving as a copy, break the connection to the old question.
 234      if ($makecopy) {
 235          $question->id = 0;
 236          $question->hidden = 0; // Copies should not be hidden.
 237      }
 238  
 239      /// Process the combination of usecurrentcat, categorymoveto and category form
 240      /// fields, so the save_question method only has to consider $fromform->category
 241      if (!empty($fromform->usecurrentcat)) {
 242          // $fromform->category is the right category to save in.
 243      } else {
 244          if (!empty($fromform->categorymoveto)) {
 245              $fromform->category = $fromform->categorymoveto;
 246          } else {
 247              // $fromform->category is the right category to save in.
 248          }
 249      }
 250  
 251      /// If we are moving a question, check we have permission to move it from
 252      /// whence it came. (Where we are moving to is validated by the form.)
 253      list($newcatid, $newcontextid) = explode(',', $fromform->category);
 254      if (!empty($question->id) && $newcatid != $question->category) {
 255          $contextid = $newcontextid;
 256          question_require_capability_on($question, 'move');
 257      } else {
 258          $contextid = $category->contextid;
 259      }
 260  
 261      // Ensure we redirect back to the category the question is being saved into.
 262      $returnurl->param('category', $fromform->category);
 263  
 264      // We are actually saving the question.
 265      if (!empty($question->id)) {
 266          question_require_capability_on($question, 'edit');
 267      } else {
 268          require_capability('moodle/question:add', context::instance_by_id($contextid));
 269          if (!empty($fromform->makecopy) && !$question->formoptions->cansaveasnew) {
 270              print_error('nopermissions', '', '', 'edit');
 271          }
 272      }
 273  
 274      $question = $qtypeobj->save_question($question, $fromform);
 275      if (isset($fromform->tags)) {
 276          // If we have any question context level tags then set those tags now.
 277          core_tag_tag::set_item_tags('core_question', 'question', $question->id,
 278                  context::instance_by_id($contextid), $fromform->tags, 0);
 279      }
 280  
 281      if (isset($fromform->coursetags)) {
 282          // If we have and course context level tags then set those now.
 283          core_tag_tag::set_item_tags('core_question', 'question', $question->id,
 284                  context_course::instance($fromform->courseid), $fromform->coursetags, 0);
 285      }
 286  
 287      // Purge this question from the cache.
 288      question_bank::notify_question_edited($question->id);
 289  
 290      // If we are saving and continuing to edit the question.
 291      if (!empty($fromform->updatebutton)) {
 292          $url->param('id', $question->id);
 293          $url->remove_params('makecopy');
 294          redirect($url);
 295      }
 296  
 297      if ($qtypeobj->finished_edit_wizard($fromform)) {
 298          if ($inpopup) {
 299              echo $OUTPUT->notification(get_string('changessaved'), '');
 300              close_window(3);
 301          } else {
 302              $returnurl->param('lastchanged', $question->id);
 303              if ($appendqnumstring) {
 304                  $returnurl->param($appendqnumstring, $question->id);
 305                  $returnurl->param('sesskey', sesskey());
 306                  $returnurl->param('cmid', $cmid);
 307              }
 308              redirect($returnurl);
 309          }
 310  
 311      } else {
 312          $nexturlparams = array(
 313                  'returnurl' => $originalreturnurl,
 314                  'appendqnumstring' => $appendqnumstring,
 315                  'scrollpos' => $scrollpos);
 316          if (isset($fromform->nextpageparam) && is_array($fromform->nextpageparam)){
 317              //useful for passing data to the next page which is not saved in the database.
 318              $nexturlparams += $fromform->nextpageparam;
 319          }
 320          $nexturlparams['id'] = $question->id;
 321          $nexturlparams['wizardnow'] = $fromform->wizard;
 322          $nexturl = new moodle_url('/question/question.php', $nexturlparams);
 323          if ($cmid){
 324              $nexturl->param('cmid', $cmid);
 325          } else {
 326              $nexturl->param('courseid', $COURSE->id);
 327          }
 328          redirect($nexturl);
 329      }
 330  
 331  }
 332  
 333  $streditingquestion = $qtypeobj->get_heading();
 334  $PAGE->set_title($streditingquestion);
 335  $PAGE->set_heading($COURSE->fullname);
 336  $PAGE->navbar->add($streditingquestion);
 337  
 338  // Display a heading, question editing form and possibly some extra content needed for
 339  // for this question type.
 340  echo $OUTPUT->header();
 341  $qtypeobj->display_question_editing_page($mform, $question, $wizardnow);
 342  echo $OUTPUT->footer();