[Summary view] [Print] [Text view]

   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  /**
  19   * Matching
  20   *
  21   * @package mod_lesson
  22   * @copyright  2009 Sam Hemelryk
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   **/
  25  
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  /** Matching question type */
  29  define("LESSON_PAGE_MATCHING",      "5");
  30  
  31  class lesson_page_type_matching extends lesson_page {
  32  
  33      protected $type = lesson_page::TYPE_QUESTION;
  34      protected $typeid = LESSON_PAGE_MATCHING;
  35      protected $typeidstring = 'matching';
  36      protected $string = null;
  37  
  38      public function get_typeid() {
  39          return $this->typeid;
  40      }
  41      public function get_typestring() {
  42          if ($this->string===null) {
  43              $this->string = get_string($this->typeidstring, 'lesson');
  44          }
  45          return $this->string;
  46      }
  47      public function get_idstring() {
  48          return $this->typeidstring;
  49      }
  50      public function display($renderer, $attempt) {
  51          global $USER, $CFG, $PAGE;
  52          $mform = $this->make_answer_form($attempt);
  53          $data = new stdClass;
  54          $data->id = $PAGE->cm->id;
  55          $data->pageid = $this->properties->id;
  56          $mform->set_data($data);
  57          return $mform->display();
  58      }
  59  
  60      protected function make_answer_form($attempt=null) {
  61          global $USER, $CFG;
  62          // don't shuffle answers (could be an option??)
  63          $getanswers = array_slice($this->get_answers(), 2);
  64  
  65          $answers = array();
  66          foreach ($getanswers as $getanswer) {
  67              $answers[$getanswer->id] = $getanswer;
  68          }
  69  
  70          $responses = array();
  71          foreach ($answers as $answer) {
  72              // get all the response
  73              if ($answer->response != null) {
  74                  $responses[] = trim($answer->response);
  75              }
  76          }
  77  
  78          $responseoptions = array(''=>get_string('choosedots'));
  79          if (!empty($responses)) {
  80              shuffle($responses);
  81              foreach ($responses as  $response) {
  82                  $responseoptions[htmlspecialchars($response)] = $response;
  83              }
  84          }
  85          if (isset($USER->modattempts[$this->lesson->id]) && !empty($attempt->useranswer)) {
  86              $useranswers = explode(',', $attempt->useranswer);
  87              $t = 0;
  88          } else {
  89              $useranswers = array();
  90          }
  91  
  92          $action = $CFG->wwwroot.'/mod/lesson/continue.php';
  93          $params = array('answers'=>$answers, 'useranswers'=>$useranswers, 'responseoptions'=>$responseoptions, 'lessonid'=>$this->lesson->id, 'contents'=>$this->get_contents());
  94          $mform = new lesson_display_answer_form_matching($action, $params);
  95          return $mform;
  96      }
  97  
  98      public function create_answers($properties) {
  99          global $DB, $PAGE;
 100          // now add the answers
 101          $newanswer = new stdClass;
 102          $newanswer->lessonid = $this->lesson->id;
 103          $newanswer->pageid = $this->properties->id;
 104          $newanswer->timecreated = $this->properties->timecreated;
 105  
 106          $cm = get_coursemodule_from_instance('lesson', $this->lesson->id, $this->lesson->course);
 107          $context = context_module::instance($cm->id);
 108  
 109          $answers = array();
 110  
 111          // need to add two to offset correct response and wrong response
 112          $this->lesson->maxanswers = $this->lesson->maxanswers + 2;
 113          for ($i = 0; $i < $this->lesson->maxanswers; $i++) {
 114              $answer = clone($newanswer);
 115              if (!empty($properties->answer_editor[$i]) && is_array($properties->answer_editor[$i])) {
 116                  $answer->answer = $properties->answer_editor[$i]['text'];
 117                  $answer->answerformat = $properties->answer_editor[$i]['format'];
 118              }
 119              if (!empty($properties->response_editor[$i])) {
 120                  $answer->response = $properties->response_editor[$i];
 121                  $answer->responseformat = 0;
 122              }
 123  
 124              if (isset($properties->jumpto[$i])) {
 125                  $answer->jumpto = $properties->jumpto[$i];
 126              }
 127              if ($this->lesson->custom && isset($properties->score[$i])) {
 128                  $answer->score = $properties->score[$i];
 129              }
 130  
 131              if (isset($answer->answer) && $answer->answer != '') {
 132                  $answer->id = $DB->insert_record("lesson_answers", $answer);
 133                  $this->save_answers_files($context, $PAGE->course->maxbytes,
 134                          $answer, $properties->answer_editor[$i]);
 135                  $answers[$answer->id] = new lesson_page_answer($answer);
 136              } else if ($i < 2) {
 137                  $answer->id = $DB->insert_record("lesson_answers", $answer);
 138                  $answers[$answer->id] = new lesson_page_answer($answer);
 139              } else {
 140                  break;
 141              }
 142          }
 143          $this->answers = $answers;
 144          return $answers;
 145      }
 146  
 147      public function check_answer() {
 148          global $CFG, $PAGE;
 149  
 150          $formattextdefoptions = new stdClass();
 151          $formattextdefoptions->noclean = true;
 152          $formattextdefoptions->para = false;
 153  
 154          $result = parent::check_answer();
 155  
 156          $mform = $this->make_answer_form();
 157  
 158          $data = $mform->get_data();
 159          require_sesskey();
 160  
 161          if (!$data) {
 162              redirect(new moodle_url('/mod/lesson/view.php', array('id'=>$PAGE->cm->id, 'pageid'=>$this->properties->id)));
 163          }
 164  
 165          $response = $data->response;
 166          $getanswers = $this->get_answers();
 167          foreach ($getanswers as $key => $answer) {
 168              $getanswers[$key] = parent::rewrite_answers_urls($answer);
 169          }
 170  
 171          $correct = array_shift($getanswers);
 172          $wrong   = array_shift($getanswers);
 173  
 174          $answers = array();
 175          foreach ($getanswers as $key => $answer) {
 176              if ($answer->answer !== '' or $answer->response !== '') {
 177                  $answers[$answer->id] = $answer;
 178              }
 179          }
 180  
 181          // get the user's exact responses for record keeping
 182          $hits = 0;
 183          $userresponse = array();
 184          foreach ($response as $id => $value) {
 185              if ($value == '') {
 186                  $result->noanswer = true;
 187                  return $result;
 188              }
 189              $value = htmlspecialchars_decode($value);
 190              $userresponse[] = $value;
 191              // Make sure the user's answer exists in question's answer
 192              if (array_key_exists($id, $answers)) {
 193                  $answer = $answers[$id];
 194                  $result->studentanswer .= '<br />'.format_text($answer->answer, $answer->answerformat, $formattextdefoptions).' = '.$value;
 195                  if (trim($answer->response) == trim($value)) {
 196                      $hits++;
 197                  }
 198              }
 199          }
 200  
 201          $result->userresponse = implode(",", $userresponse);
 202  
 203          if ($hits == count($answers)) {
 204              $result->correctanswer = true;
 205              $result->response      = format_text($correct->answer, $correct->answerformat, $formattextdefoptions);
 206              $result->answerid      = $correct->id;
 207              $result->newpageid     = $correct->jumpto;
 208          } else {
 209              $result->correctanswer = false;
 210              $result->response      = format_text($wrong->answer, $wrong->answerformat, $formattextdefoptions);
 211              $result->answerid      = $wrong->id;
 212              $result->newpageid     = $wrong->jumpto;
 213          }
 214  
 215          return $result;
 216      }
 217  
 218      public function option_description_string() {
 219          return get_string("firstanswershould", "lesson");
 220      }
 221  
 222      public function display_answers(html_table $table) {
 223          $answers = $this->get_answers();
 224          $options = new stdClass;
 225          $options->noclean = true;
 226          $options->para = false;
 227          $i = 1;
 228          $n = 0;
 229  
 230          foreach ($answers as $answer) {
 231              $answer = parent::rewrite_answers_urls($answer);
 232              if ($n < 2) {
 233                  if ($answer->answer != null) {
 234                      $cells = array();
 235                      if ($n == 0) {
 236                          $cells[] = "<span class=\"label\">".get_string("correctresponse", "lesson").'</span>';
 237                      } else {
 238                          $cells[] = "<span class=\"label\">".get_string("wrongresponse", "lesson").'</span>';
 239                      }
 240                      $cells[] = format_text($answer->answer, $answer->answerformat, $options);
 241                      $table->data[] = new html_table_row($cells);
 242                  }
 243  
 244                  if ($n == 0) {
 245                      $cells = array();
 246                      $cells[] = '<span class="label">'.get_string("correctanswerscore", "lesson")."</span>: ";
 247                      $cells[] = $answer->score;
 248                      $table->data[] = new html_table_row($cells);
 249  
 250                      $cells = array();
 251                      $cells[] = '<span class="label">'.get_string("correctanswerjump", "lesson")."</span>: ";
 252                      $cells[] = $this->get_jump_name($answer->jumpto);
 253                      $table->data[] = new html_table_row($cells);
 254                  } elseif ($n == 1) {
 255                      $cells = array();
 256                      $cells[] = '<span class="label">'.get_string("wronganswerscore", "lesson")."</span>: ";
 257                      $cells[] = $answer->score;
 258                      $table->data[] = new html_table_row($cells);
 259  
 260                      $cells = array();
 261                      $cells[] = '<span class="label">'.get_string("wronganswerjump", "lesson")."</span>: ";
 262                      $cells[] = $this->get_jump_name($answer->jumpto);
 263                      $table->data[] = new html_table_row($cells);
 264                  }
 265  
 266                  if ($n === 0){
 267                      $table->data[count($table->data)-1]->cells[0]->style = 'width:20%;';
 268                  }
 269                  $n++;
 270                  $i--;
 271              } else {
 272                  $cells = array();
 273                  if ($this->lesson->custom && $answer->score > 0) {
 274                      // if the score is > 0, then it is correct
 275                      $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 276                  } else if ($this->lesson->custom) {
 277                      $cells[] = '<span class="label">'.get_string("answer", "lesson")." $i</span>: \n";
 278                  } else if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 279                      $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 280                  } else {
 281                      $cells[] = '<span class="label">'.get_string("answer", "lesson")." $i</span>: \n";
 282                  }
 283                  $cells[] = format_text($answer->answer, $answer->answerformat, $options);
 284                  $table->data[] = new html_table_row($cells);
 285  
 286                  $cells = array();
 287                  $cells[] = '<span class="label">'.get_string("matchesanswer", "lesson")." $i</span>: ";
 288                  $cells[] = format_text($answer->response, $answer->responseformat, $options);
 289                  $table->data[] = new html_table_row($cells);
 290              }
 291              $i++;
 292          }
 293          return $table;
 294      }
 295      /**
 296       * Updates the page and its answers
 297       *
 298       * @global moodle_database $DB
 299       * @global moodle_page $PAGE
 300       * @param stdClass $properties
 301       * @return bool
 302       */
 303      public function update($properties, $context = null, $maxbytes = null) {
 304          global $DB, $PAGE;
 305          $answers  = $this->get_answers();
 306          $properties->id = $this->properties->id;
 307          $properties->lessonid = $this->lesson->id;
 308          $properties->timemodified = time();
 309          $properties = file_postupdate_standard_editor($properties, 'contents', array('noclean'=>true, 'maxfiles'=>EDITOR_UNLIMITED_FILES, 'maxbytes'=>$PAGE->course->maxbytes), context_module::instance($PAGE->cm->id), 'mod_lesson', 'page_contents', $properties->id);
 310          $DB->update_record("lesson_pages", $properties);
 311  
 312          // need to add two to offset correct response and wrong response
 313          $this->lesson->maxanswers += 2;
 314          for ($i = 0; $i < $this->lesson->maxanswers; $i++) {
 315              if (!array_key_exists($i, $this->answers)) {
 316                  $this->answers[$i] = new stdClass;
 317                  $this->answers[$i]->lessonid = $this->lesson->id;
 318                  $this->answers[$i]->pageid = $this->id;
 319                  $this->answers[$i]->timecreated = $this->timecreated;
 320              }
 321  
 322              if (!empty($properties->answer_editor[$i]) && is_array($properties->answer_editor[$i])) {
 323                  $this->answers[$i]->answer = $properties->answer_editor[$i]['text'];
 324                  $this->answers[$i]->answerformat = $properties->answer_editor[$i]['format'];
 325              }
 326              if (!empty($properties->response_editor[$i])) {
 327                  $this->answers[$i]->response = $properties->response_editor[$i];
 328                  $this->answers[$i]->responseformat = 0;
 329              }
 330  
 331              if (isset($properties->jumpto[$i])) {
 332                  $this->answers[$i]->jumpto = $properties->jumpto[$i];
 333              }
 334              if ($this->lesson->custom && isset($properties->score[$i])) {
 335                  $this->answers[$i]->score = $properties->score[$i];
 336              }
 337  
 338              // we don't need to check for isset here because properties called it's own isset method.
 339              if ($this->answers[$i]->answer != '') {
 340                  if (!isset($this->answers[$i]->id)) {
 341                      $this->answers[$i]->id =  $DB->insert_record("lesson_answers", $this->answers[$i]);
 342                  } else {
 343                      $DB->update_record("lesson_answers", $this->answers[$i]->properties());
 344                  }
 345                  // Save files in answers and responses.
 346                  $this->save_answers_files($context, $maxbytes, $this->answers[$i],
 347                          $properties->answer_editor[$i], $properties->response_editor[$i]);
 348              } else if ($i < 2) {
 349                  if (!isset($this->answers[$i]->id)) {
 350                      $this->answers[$i]->id =  $DB->insert_record("lesson_answers", $this->answers[$i]);
 351                  } else {
 352                      $DB->update_record("lesson_answers", $this->answers[$i]->properties());
 353                  }
 354  
 355                  // Save files in answers and responses.
 356                  $this->save_answers_files( $context, $maxbytes, $this->answers[$i],
 357                          $properties->answer_editor[$i], $properties->response_editor[$i]);
 358              } else if (isset($this->answers[$i]->id)) {
 359                  $DB->delete_records('lesson_answers', array('id'=>$this->answers[$i]->id));
 360                  unset($this->answers[$i]);
 361              }
 362          }
 363          return true;
 364      }
 365      public function stats(array &$pagestats, $tries) {
 366          if(count($tries) > $this->lesson->maxattempts) { // if there are more tries than the max that is allowed, grab the last "legal" attempt
 367              $temp = $tries[$this->lesson->maxattempts - 1];
 368          } else {
 369              // else, user attempted the question less than the max, so grab the last one
 370              $temp = end($tries);
 371          }
 372          if ($temp->correct) {
 373              if (isset($pagestats[$temp->pageid]["correct"])) {
 374                  $pagestats[$temp->pageid]["correct"]++;
 375              } else {
 376                  $pagestats[$temp->pageid]["correct"] = 1;
 377              }
 378          }
 379          if (isset($pagestats[$temp->pageid]["total"])) {
 380              $pagestats[$temp->pageid]["total"]++;
 381          } else {
 382              $pagestats[$temp->pageid]["total"] = 1;
 383          }
 384          return true;
 385      }
 386      public function report_answers($answerpage, $answerdata, $useranswer, $pagestats, &$i, &$n) {
 387          $answers = array();
 388          foreach ($this->get_answers() as $answer) {
 389              $answers[$answer->id] = $answer;
 390          }
 391          $formattextdefoptions = new stdClass;
 392          $formattextdefoptions->para = false;  //I'll use it widely in this page
 393          foreach ($answers as $answer) {
 394              if ($n == 0 && $useranswer != null && $useranswer->correct) {
 395                  if ($answer->response == null && $useranswer != null) {
 396                      $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 397                  } else {
 398                      $answerdata->response = $answer->response;
 399                  }
 400                  if ($this->lesson->custom) {
 401                      $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 402                  } else {
 403                      $answerdata->score = get_string("receivedcredit", "lesson");
 404                  }
 405              } elseif ($n == 1 && $useranswer != null && !$useranswer->correct) {
 406                  if ($answer->response == null && $useranswer != null) {
 407                      $answerdata->response = get_string("thatsthewronganswer", "lesson");
 408                  } else {
 409                      $answerdata->response = $answer->response;
 410                  }
 411                  if ($this->lesson->custom) {
 412                      $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 413                  } else {
 414                      $answerdata->score = get_string("didnotreceivecredit", "lesson");
 415                  }
 416              } elseif ($n > 1) {
 417                  $data = '<label class="accesshide" for="answer_' . $n . '">' . get_string('answer', 'lesson') . '</label>';
 418                  $data .= strip_tags(format_string($answer->answer)) . ' ';
 419                  if ($useranswer != null) {
 420                      $userresponse = explode(",", $useranswer->useranswer);
 421                      $data .= '<label class="accesshide" for="stu_answer_response_' . $n . '">' . get_string('matchesanswer', 'lesson') . '</label>';
 422                      $data .= "<select id=\"stu_answer_response_" . $n . "\" disabled=\"disabled\"><option selected=\"selected\">";
 423                      if (array_key_exists($i, $userresponse)) {
 424                          $data .= $userresponse[$i];
 425                      }
 426                      $data .= "</option></select>";
 427                  } else {
 428                      $data .= '<label class="accesshide" for="answer_response_' . $n . '">' . get_string('matchesanswer', 'lesson') . '</label>';
 429                      $data .= "<select id=\"answer_response_" . $n . "\" disabled=\"disabled\"><option selected=\"selected\">".strip_tags(format_string($answer->response))."</option></select>";
 430                  }
 431  
 432                  if ($n == 2) {
 433                      if (isset($pagestats[$this->properties->id])) {
 434                          if (!array_key_exists('correct', $pagestats[$this->properties->id])) {
 435                              $pagestats[$this->properties->id]["correct"] = 0;
 436                          }
 437                          $percent = $pagestats[$this->properties->id]["correct"] / $pagestats[$this->properties->id]["total"] * 100;
 438                          $percent = round($percent, 2);
 439                          $percent .= "% ".get_string("answeredcorrectly", "lesson");
 440                      } else {
 441                          $percent = get_string("nooneansweredthisquestion", "lesson");
 442                      }
 443                  } else {
 444                      $percent = '';
 445                  }
 446  
 447                  $answerdata->answers[] = array($data, $percent);
 448                  $i++;
 449              }
 450              $n++;
 451              $answerpage->answerdata = $answerdata;
 452          }
 453          return $answerpage;
 454      }
 455      public function get_jumps() {
 456          global $DB;
 457          // The jumps for matching question type are stored in the 1st and 2nd answer record.
 458          $jumps = array();
 459          if ($answers = $DB->get_records("lesson_answers", array("lessonid" => $this->lesson->id, "pageid" => $this->properties->id), 'id', '*', 0, 2)) {
 460              foreach ($answers as $answer) {
 461                  $jumps[] = $this->get_jump_name($answer->jumpto);
 462              }
 463          } else {
 464              $jumps[] = $this->get_jump_name($this->properties->nextpageid);
 465          }
 466          return $jumps;
 467      }
 468  }
 469  
 470  class lesson_add_page_form_matching extends lesson_add_page_form_base {
 471  
 472      public $qtype = 'matching';
 473      public $qtypestring = 'matching';
 474  
 475      public function custom_definition() {
 476  
 477          $this->_form->addElement('header', 'correctresponse', get_string('correctresponse', 'lesson'));
 478          $this->_form->addElement('editor', 'answer_editor[0]', get_string('correctresponse', 'lesson'),
 479                  array('rows' => '4', 'columns' => '80'),
 480                  array('noclean' => true, 'maxfiles' => EDITOR_UNLIMITED_FILES, 'maxbytes' => $this->_customdata['maxbytes']));
 481          $this->_form->setType('answer_editor[0]', PARAM_RAW);
 482          $this->_form->setDefault('answer_editor[0]', array('text' => '', 'format' => FORMAT_HTML));
 483          $this->add_jumpto(0, get_string('correctanswerjump','lesson'), LESSON_NEXTPAGE);
 484          $this->add_score(0, get_string("correctanswerscore", "lesson"), 1);
 485  
 486          $this->_form->addElement('header', 'wrongresponse', get_string('wrongresponse', 'lesson'));
 487          $this->_form->addElement('editor', 'answer_editor[1]', get_string('wrongresponse', 'lesson'),
 488                  array('rows' => '4', 'columns' => '80'),
 489                  array('noclean' => true, 'maxfiles' => EDITOR_UNLIMITED_FILES, 'maxbytes' => $this->_customdata['maxbytes']));
 490          $this->_form->setType('answer_editor[1]', PARAM_RAW);
 491          $this->_form->setDefault('answer_editor[1]', array('text' => '', 'format' => FORMAT_HTML));
 492  
 493          $this->add_jumpto(1, get_string('wronganswerjump','lesson'), LESSON_THISPAGE);
 494          $this->add_score(1, get_string("wronganswerscore", "lesson"), 0);
 495  
 496          for ($i = 2; $i < $this->_customdata['lesson']->maxanswers+2; $i++) {
 497              $this->_form->addElement('header', 'matchingpair'.($i-1), get_string('matchingpair', 'lesson', $i-1));
 498              $this->add_answer($i, null, ($i < 4));
 499              $required = ($i < 4);
 500              $label = get_string('matchesanswer','lesson');
 501              $count = $i;
 502              $this->_form->addElement('text', 'response_editor['.$count.']', $label, array('size'=>'50'));
 503              $this->_form->setType('response_editor['.$count.']', PARAM_NOTAGS);
 504              $this->_form->setDefault('response_editor['.$count.']', '');
 505              if ($required) {
 506                  $this->_form->addRule('response_editor['.$count.']', get_string('required'), 'required', null, 'client');
 507              }
 508          }
 509      }
 510  }
 511  
 512  class lesson_display_answer_form_matching extends moodleform {
 513  
 514      public function definition() {
 515          global $USER, $OUTPUT, $PAGE;
 516          $mform = $this->_form;
 517          $answers = $this->_customdata['answers'];
 518          $useranswers = $this->_customdata['useranswers'];
 519          $responseoptions = $this->_customdata['responseoptions'];
 520          $lessonid = $this->_customdata['lessonid'];
 521          $contents = $this->_customdata['contents'];
 522  
 523          $mform->addElement('header', 'pageheader');
 524  
 525          $mform->addElement('html', $OUTPUT->container($contents, 'contents'));
 526  
 527          $hasattempt = false;
 528          $disabled = '';
 529          if (isset($useranswers) && !empty($useranswers)) {
 530              $hasattempt = true;
 531              $disabled = array('disabled' => 'disabled');
 532          }
 533  
 534          $options = new stdClass;
 535          $options->para = false;
 536          $options->noclean = true;
 537  
 538          $mform->addElement('hidden', 'id');
 539          $mform->setType('id', PARAM_INT);
 540  
 541          $mform->addElement('hidden', 'pageid');
 542          $mform->setType('pageid', PARAM_INT);
 543  
 544          $i = 0;
 545  
 546          foreach ($answers as $answer) {
 547              $mform->addElement('html', '<div class="answeroption">');
 548              if ($answer->response != null) {
 549                  $responseid = 'response['.$answer->id.']';
 550                  if ($hasattempt) {
 551                      $responseid = 'response_'.$answer->id;
 552                      $mform->addElement('hidden', 'response['.$answer->id.']', htmlspecialchars($useranswers[$i]));
 553                      // Temporary fixed until MDL-38885 gets integrated
 554                      $mform->setType('response', PARAM_TEXT);
 555                  }
 556                  $context = context_module::instance($PAGE->cm->id);
 557                  $answer->answer = file_rewrite_pluginfile_urls($answer->answer, 'pluginfile.php', $context->id,
 558                          'mod_lesson', 'page_answers', $answer->id);
 559                  $mform->addElement('select', $responseid, format_text($answer->answer,$answer->answerformat,$options), $responseoptions, $disabled);
 560                  $mform->setType($responseid, PARAM_TEXT);
 561                  if ($hasattempt) {
 562                      $mform->setDefault($responseid, htmlspecialchars(trim($useranswers[$i])));
 563                  } else {
 564                      $mform->setDefault($responseid, 'answeroption');
 565                  }
 566              }
 567              $mform->addElement('html', '</div>');
 568              $i++;
 569          }
 570          if ($hasattempt) {
 571              $this->add_action_buttons(null, get_string("nextpage", "lesson"));
 572          } else {
 573              $this->add_action_buttons(null, get_string("submit", "lesson"));
 574          }
 575      }
 576  
 577  }