mod/lesson/pagetypes/matching.php

   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 }