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   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   * Multichoice
  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  /** Multichoice question type */
  29  define("LESSON_PAGE_MULTICHOICE",   "3");
  30  
  31  class lesson_page_type_multichoice extends lesson_page {
  32  
  33      protected $type = lesson_page::TYPE_QUESTION;
  34      protected $typeidstring = 'multichoice';
  35      protected $typeid = LESSON_PAGE_MULTICHOICE;
  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  
  51      /**
  52       * Gets an array of the jumps used by the answers of this page
  53       *
  54       * @return array
  55       */
  56      public function get_jumps() {
  57          global $DB;
  58          $jumps = array();
  59          if ($answers = $this->get_answers()) {
  60              foreach ($answers as $answer) {
  61                  if ($answer->answer === '') {
  62                      // show only jumps for real branches (==have description)
  63                      continue;
  64                  }
  65                  $jumps[] = $this->get_jump_name($answer->jumpto);
  66              }
  67          } else {
  68              // We get here is the lesson was created on a Moodle 1.9 site and
  69              // the lesson contains question pages without any answers.
  70              $jumps[] = $this->get_jump_name($this->properties->nextpageid);
  71          }
  72          return $jumps;
  73      }
  74  
  75      public function get_used_answers() {
  76          $answers = $this->get_answers();
  77          foreach ($answers as $key=>$answer) {
  78              if ($answer->answer === '') {
  79                  unset($answers[$key]);
  80              } else {
  81                  $answers[$key] = parent::rewrite_answers_urls($answer);
  82              }
  83          }
  84          return $answers;
  85      }
  86  
  87      public function display($renderer, $attempt) {
  88          global $CFG, $PAGE;
  89          $answers = $this->get_used_answers();
  90          shuffle($answers);
  91          $action = $CFG->wwwroot.'/mod/lesson/continue.php';
  92          $params = array('answers'=>$answers, 'lessonid'=>$this->lesson->id, 'contents'=>$this->get_contents(), 'attempt'=>$attempt);
  93          if ($this->properties->qoption) {
  94              $mform = new lesson_display_answer_form_multichoice_multianswer($action, $params);
  95          } else {
  96              $mform = new lesson_display_answer_form_multichoice_singleanswer($action, $params);
  97          }
  98          $data = new stdClass;
  99          $data->id = $PAGE->cm->id;
 100          $data->pageid = $this->properties->id;
 101          $mform->set_data($data);
 102  
 103          // Trigger an event question viewed.
 104          $eventparams = array(
 105              'context' => context_module::instance($PAGE->cm->id),
 106              'objectid' => $this->properties->id,
 107              'other' => array(
 108                      'pagetype' => $this->get_typestring()
 109                  )
 110              );
 111  
 112          $event = \mod_lesson\event\question_viewed::create($eventparams);
 113          $event->trigger();
 114          return $mform->display();
 115      }
 116  
 117      public function check_answer() {
 118          global $DB, $CFG, $PAGE;
 119          $result = parent::check_answer();
 120  
 121          $formattextdefoptions = new stdClass();
 122          $formattextdefoptions->noclean = true;
 123          $formattextdefoptions->para = false;
 124  
 125          $answers = $this->get_used_answers();
 126          shuffle($answers);
 127          $action = $CFG->wwwroot.'/mod/lesson/continue.php';
 128          $params = array('answers'=>$answers, 'lessonid'=>$this->lesson->id, 'contents'=>$this->get_contents());
 129          if ($this->properties->qoption) {
 130              $mform = new lesson_display_answer_form_multichoice_multianswer($action, $params);
 131          } else {
 132              $mform = new lesson_display_answer_form_multichoice_singleanswer($action, $params);
 133          }
 134          $data = $mform->get_data();
 135          require_sesskey();
 136  
 137          if (!$data) {
 138              redirect(new moodle_url('/mod/lesson/view.php', array('id'=>$PAGE->cm->id, 'pageid'=>$this->properties->id)));
 139          }
 140  
 141          if ($this->properties->qoption) {
 142              // Multianswer allowed, user's answer is an array
 143  
 144              if (empty($data->answer) || !is_array($data->answer)) {
 145                  $result->noanswer = true;
 146                  return $result;
 147              }
 148  
 149              $studentanswers = array();
 150              foreach ($data->answer as $key=>$value) {
 151                  $studentanswers[] = (int)$key;
 152              }
 153  
 154              // get what the user answered
 155              $result->userresponse = implode(",", $studentanswers);
 156  
 157              // get the answers in a set order, the id order
 158              $answers = $this->get_used_answers();
 159              $ncorrect = 0;
 160              $nhits = 0;
 161              $responses = array();
 162              $correctanswerid = 0;
 163              $wronganswerid = 0;
 164              // store student's answers for displaying on feedback page
 165              $result->studentanswer = '';
 166              $result->studentanswerformat = FORMAT_HTML;
 167              foreach ($answers as $answer) {
 168                  foreach ($studentanswers as $answerid) {
 169                      if ($answerid == $answer->id) {
 170                          $result->studentanswer .= '<br />'.format_text($answer->answer, $answer->answerformat, $formattextdefoptions);
 171                          if (trim(strip_tags($answer->response))) {
 172                              $responses[$answerid] = format_text($answer->response, $answer->responseformat, $formattextdefoptions);
 173                          }
 174                      }
 175                  }
 176              }
 177              $correctpageid = null;
 178              $wrongpageid = null;
 179              // this is for custom scores.  If score on answer is positive, it is correct
 180              if ($this->lesson->custom) {
 181                  $ncorrect = 0;
 182                  $nhits = 0;
 183                  foreach ($answers as $answer) {
 184                      if ($answer->score > 0) {
 185                          $ncorrect++;
 186  
 187                          foreach ($studentanswers as $answerid) {
 188                              if ($answerid == $answer->id) {
 189                                 $nhits++;
 190                              }
 191                          }
 192                          // save the first jumpto page id, may be needed!...
 193                          if (!isset($correctpageid)) {
 194                              // leave in its "raw" state - will converted into a proper page id later
 195                              $correctpageid = $answer->jumpto;
 196                          }
 197                          // save the answer id for scoring
 198                          if ($correctanswerid == 0) {
 199                              $correctanswerid = $answer->id;
 200                          }
 201                      } else {
 202                          // save the first jumpto page id, may be needed!...
 203                          if (!isset($wrongpageid)) {
 204                              // leave in its "raw" state - will converted into a proper page id later
 205                              $wrongpageid = $answer->jumpto;
 206                          }
 207                          // save the answer id for scoring
 208                          if ($wronganswerid == 0) {
 209                              $wronganswerid = $answer->id;
 210                          }
 211                      }
 212                  }
 213              } else {
 214                  foreach ($answers as $answer) {
 215                      if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 216                          $ncorrect++;
 217                          foreach ($studentanswers as $answerid) {
 218                              if ($answerid == $answer->id) {
 219                                  $nhits++;
 220                              }
 221                          }
 222                          // save the first jumpto page id, may be needed!...
 223                          if (!isset($correctpageid)) {
 224                              // leave in its "raw" state - will converted into a proper page id later
 225                              $correctpageid = $answer->jumpto;
 226                          }
 227                          // save the answer id for scoring
 228                          if ($correctanswerid == 0) {
 229                              $correctanswerid = $answer->id;
 230                          }
 231                      } else {
 232                          // save the first jumpto page id, may be needed!...
 233                          if (!isset($wrongpageid)) {
 234                              // leave in its "raw" state - will converted into a proper page id later
 235                              $wrongpageid = $answer->jumpto;
 236                          }
 237                          // save the answer id for scoring
 238                          if ($wronganswerid == 0) {
 239                              $wronganswerid = $answer->id;
 240                          }
 241                      }
 242                  }
 243              }
 244              if ((count($studentanswers) == $ncorrect) and ($nhits == $ncorrect)) {
 245                  $result->correctanswer = true;
 246                  $result->response  = implode('<br />', $responses);
 247                  $result->newpageid = $correctpageid;
 248                  $result->answerid  = $correctanswerid;
 249              } else {
 250                  $result->response  = implode('<br />', $responses);
 251                  $result->newpageid = $wrongpageid;
 252                  $result->answerid  = $wronganswerid;
 253              }
 254          } else {
 255              // only one answer allowed
 256              if (!isset($data->answerid) || (empty($data->answerid) && !is_int($data->answerid))) {
 257                  $result->noanswer = true;
 258                  return $result;
 259              }
 260              $result->answerid = $data->answerid;
 261              if (!$answer = $DB->get_record("lesson_answers", array("id" => $result->answerid))) {
 262                  print_error("Continue: answer record not found");
 263              }
 264              $answer = parent::rewrite_answers_urls($answer);
 265              if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 266                  $result->correctanswer = true;
 267              }
 268              if ($this->lesson->custom) {
 269                  if ($answer->score > 0) {
 270                      $result->correctanswer = true;
 271                  } else {
 272                      $result->correctanswer = false;
 273                  }
 274              }
 275              $result->newpageid = $answer->jumpto;
 276              $result->response  = format_text($answer->response, $answer->responseformat, $formattextdefoptions);
 277              $result->userresponse = format_text($answer->answer, $answer->answerformat, $formattextdefoptions);
 278              $result->studentanswer = $result->userresponse;
 279          }
 280          return $result;
 281      }
 282  
 283      public function option_description_string() {
 284          if ($this->properties->qoption) {
 285              return " - ".get_string("multianswer", "lesson");
 286          }
 287          return parent::option_description_string();
 288      }
 289  
 290      public function display_answers(html_table $table) {
 291          $answers = $this->get_used_answers();
 292          $options = new stdClass;
 293          $options->noclean = true;
 294          $options->para = false;
 295          $i = 1;
 296          foreach ($answers as $answer) {
 297              $answer = parent::rewrite_answers_urls($answer);
 298              $cells = array();
 299              if ($this->lesson->custom && $answer->score > 0) {
 300                  // if the score is > 0, then it is correct
 301                  $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 302              } else if ($this->lesson->custom) {
 303                  $cells[] = '<span class="label">'.get_string("answer", "lesson")." $i</span>: \n";
 304              } else if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 305                  // underline correct answers
 306                  $cells[] = '<span class="correct">'.get_string("answer", "lesson")." $i</span>: \n";
 307              } else {
 308                  $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 309              }
 310              $cells[] = format_text($answer->answer, $answer->answerformat, $options);
 311              $table->data[] = new html_table_row($cells);
 312  
 313              $cells = array();
 314              $cells[] = "<span class=\"label\">".get_string("response", "lesson")." $i</span>";
 315              $cells[] = format_text($answer->response, $answer->responseformat, $options);
 316              $table->data[] = new html_table_row($cells);
 317  
 318              $cells = array();
 319              $cells[] = "<span class=\"label\">".get_string("score", "lesson").'</span>';
 320              $cells[] = $answer->score;
 321              $table->data[] = new html_table_row($cells);
 322  
 323              $cells = array();
 324              $cells[] = "<span class=\"label\">".get_string("jump", "lesson").'</span>';
 325              $cells[] = $this->get_jump_name($answer->jumpto);
 326              $table->data[] = new html_table_row($cells);
 327              if ($i === 1){
 328                  $table->data[count($table->data)-1]->cells[0]->style = 'width:20%;';
 329              }
 330              $i++;
 331          }
 332          return $table;
 333      }
 334      public function stats(array &$pagestats, $tries) {
 335          if(count($tries) > $this->lesson->maxattempts) { // if there are more tries than the max that is allowed, grab the last "legal" attempt
 336              $temp = $tries[$this->lesson->maxattempts - 1];
 337          } else {
 338              // else, user attempted the question less than the max, so grab the last one
 339              $temp = end($tries);
 340          }
 341          if ($this->properties->qoption) {
 342              $userresponse = explode(",", $temp->useranswer);
 343              foreach ($userresponse as $response) {
 344                  if (isset($pagestats[$temp->pageid][$response])) {
 345                      $pagestats[$temp->pageid][$response]++;
 346                  } else {
 347                      $pagestats[$temp->pageid][$response] = 1;
 348                  }
 349              }
 350          } else {
 351              if (isset($pagestats[$temp->pageid][$temp->answerid])) {
 352                  $pagestats[$temp->pageid][$temp->answerid]++;
 353              } else {
 354                  $pagestats[$temp->pageid][$temp->answerid] = 1;
 355              }
 356          }
 357          if (isset($pagestats[$temp->pageid]["total"])) {
 358              $pagestats[$temp->pageid]["total"]++;
 359          } else {
 360              $pagestats[$temp->pageid]["total"] = 1;
 361          }
 362          return true;
 363      }
 364  
 365      public function report_answers($answerpage, $answerdata, $useranswer, $pagestats, &$i, &$n) {
 366          $answers = $this->get_used_answers();
 367          $formattextdefoptions = new stdClass;
 368          $formattextdefoptions->para = false;  //I'll use it widely in this page
 369          $formattextdefoptions->context = $answerpage->context;
 370  
 371          foreach ($answers as $answer) {
 372              if ($this->properties->qoption) {
 373                  if ($useranswer == null) {
 374                      $userresponse = array();
 375                  } else {
 376                      $userresponse = explode(",", $useranswer->useranswer);
 377                  }
 378                  if (in_array($answer->id, $userresponse)) {
 379                      // make checked
 380                      $data = "<input  readonly=\"readonly\" disabled=\"disabled\" name=\"answer[$i]\" checked=\"checked\" type=\"checkbox\" value=\"1\" />";
 381                      if (!isset($answerdata->response)) {
 382                          if ($answer->response == null) {
 383                              if ($useranswer->correct) {
 384                                  $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 385                              } else {
 386                                  $answerdata->response = get_string("thatsthewronganswer", "lesson");
 387                              }
 388                          } else {
 389                              $answerdata->response = $answer->response;
 390                          }
 391                      }
 392                      if (!isset($answerdata->score)) {
 393                          if ($this->lesson->custom) {
 394                              $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 395                          } elseif ($useranswer->correct) {
 396                              $answerdata->score = get_string("receivedcredit", "lesson");
 397                          } else {
 398                              $answerdata->score = get_string("didnotreceivecredit", "lesson");
 399                          }
 400                      }
 401                  } else {
 402                      // unchecked
 403                      $data = "<input type=\"checkbox\" readonly=\"readonly\" name=\"answer[$i]\" value=\"0\" disabled=\"disabled\" />";
 404                  }
 405                  if (($answer->score > 0 && $this->lesson->custom) || ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto) && !$this->lesson->custom)) {
 406                      $data = "<div class=highlight>".$data.' '.format_text($answer->answer,$answer->answerformat,$formattextdefoptions)."</div>";
 407                  } else {
 408                      $data .= format_text($answer->answer,$answer->answerformat,$formattextdefoptions);
 409                  }
 410              } else {
 411                  if ($useranswer != null and $answer->id == $useranswer->answerid) {
 412                      // make checked
 413                      $data = "<input  readonly=\"readonly\" disabled=\"disabled\" name=\"answer[$i]\" checked=\"checked\" type=\"checkbox\" value=\"1\" />";
 414                      if ($answer->response == null) {
 415                          if ($useranswer->correct) {
 416                              $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 417                          } else {
 418                              $answerdata->response = get_string("thatsthewronganswer", "lesson");
 419                          }
 420                      } else {
 421                          $answerdata->response = $answer->response;
 422                      }
 423                      if ($this->lesson->custom) {
 424                          $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 425                      } elseif ($useranswer->correct) {
 426                          $answerdata->score = get_string("receivedcredit", "lesson");
 427                      } else {
 428                          $answerdata->score = get_string("didnotreceivecredit", "lesson");
 429                      }
 430                  } else {
 431                      // unchecked
 432                      $data = "<input type=\"checkbox\" readonly=\"readonly\" name=\"answer[$i]\" value=\"0\" disabled=\"disabled\" />";
 433                  }
 434                  if (($answer->score > 0 && $this->lesson->custom) || ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto) && !$this->lesson->custom)) {
 435                      $data = "<div class=\"highlight\">".$data.' '.format_text($answer->answer,FORMAT_MOODLE,$formattextdefoptions)."</div>";
 436                  } else {
 437                      $data .= format_text($answer->answer,$answer->answerformat,$formattextdefoptions);
 438                  }
 439              }
 440              if (isset($pagestats[$this->properties->id][$answer->id])) {
 441                  $percent = $pagestats[$this->properties->id][$answer->id] / $pagestats[$this->properties->id]["total"] * 100;
 442                  $percent = round($percent, 2);
 443                  $percent .= "% ".get_string("checkedthisone", "lesson");
 444              } else {
 445                  $percent = get_string("noonecheckedthis", "lesson");
 446              }
 447  
 448              $answerdata->answers[] = array($data, $percent);
 449              $answerpage->answerdata = $answerdata;
 450          }
 451          return $answerpage;
 452      }
 453  }
 454  
 455  
 456  class lesson_add_page_form_multichoice extends lesson_add_page_form_base {
 457  
 458      public $qtype = 'multichoice';
 459      public $qtypestring = 'multichoice';
 460      protected $answerformat = LESSON_ANSWER_HTML;
 461      protected $responseformat = LESSON_ANSWER_HTML;
 462  
 463      public function custom_definition() {
 464  
 465          $this->_form->addElement('checkbox', 'qoption', get_string('options', 'lesson'), get_string('multianswer', 'lesson'));
 466          $this->_form->setDefault('qoption', 0);
 467          $this->_form->addHelpButton('qoption', 'multianswer', 'lesson');
 468  
 469          for ($i = 0; $i < $this->_customdata['lesson']->maxanswers; $i++) {
 470              $this->_form->addElement('header', 'answertitle'.$i, get_string('answer').' '.($i+1));
 471              $this->add_answer($i, null, ($i<2), $this->get_answer_format());
 472              $this->add_response($i);
 473              $this->add_jumpto($i, null, ($i == 0 ? LESSON_NEXTPAGE : LESSON_THISPAGE));
 474              $this->add_score($i, null, ($i===0)?1:0);
 475          }
 476      }
 477  }
 478  
 479  class lesson_display_answer_form_multichoice_singleanswer extends moodleform {
 480  
 481      public function definition() {
 482          global $USER, $OUTPUT;
 483          $mform = $this->_form;
 484          $answers = $this->_customdata['answers'];
 485          $lessonid = $this->_customdata['lessonid'];
 486          $contents = $this->_customdata['contents'];
 487          if (array_key_exists('attempt', $this->_customdata)) {
 488              $attempt = $this->_customdata['attempt'];
 489          } else {
 490              $attempt = new stdClass();
 491              $attempt->answerid = null;
 492          }
 493  
 494          // Disable shortforms.
 495          $mform->setDisableShortforms();
 496  
 497          $mform->addElement('header', 'pageheader');
 498  
 499          $mform->addElement('html', $OUTPUT->container($contents, 'contents'));
 500  
 501          $hasattempt = false;
 502          $disabled = '';
 503          if (isset($USER->modattempts[$lessonid]) && !empty($USER->modattempts[$lessonid])) {
 504              $hasattempt = true;
 505              $disabled = array('disabled' => 'disabled');
 506          }
 507  
 508          $options = new stdClass;
 509          $options->para = false;
 510          $options->noclean = true;
 511  
 512          $mform->addElement('hidden', 'id');
 513          $mform->setType('id', PARAM_INT);
 514  
 515          $mform->addElement('hidden', 'pageid');
 516          $mform->setType('pageid', PARAM_INT);
 517  
 518          $i = 0;
 519          foreach ($answers as $answer) {
 520              $mform->addElement('html', '<div class="answeroption">');
 521              $answer->answer = preg_replace('#>$#', '> ', $answer->answer);
 522              $mform->addElement('radio','answerid',null,format_text($answer->answer, $answer->answerformat, $options),$answer->id, $disabled);
 523              $mform->setType('answer'.$i, PARAM_INT);
 524              if ($hasattempt && $answer->id == $USER->modattempts[$lessonid]->answerid) {
 525                  $mform->setDefault('answerid', $USER->modattempts[$lessonid]->answerid);
 526              }
 527              $mform->addElement('html', '</div>');
 528              $i++;
 529          }
 530  
 531          if ($hasattempt) {
 532              $this->add_action_buttons(null, get_string("nextpage", "lesson"));
 533          } else {
 534              $this->add_action_buttons(null, get_string("submit", "lesson"));
 535          }
 536      }
 537  
 538  }
 539  
 540  class lesson_display_answer_form_multichoice_multianswer extends moodleform {
 541  
 542      public function definition() {
 543          global $USER, $OUTPUT;
 544          $mform = $this->_form;
 545          $answers = $this->_customdata['answers'];
 546  
 547          $lessonid = $this->_customdata['lessonid'];
 548          $contents = $this->_customdata['contents'];
 549  
 550          // Disable shortforms.
 551          $mform->setDisableShortforms();
 552  
 553          $mform->addElement('header', 'pageheader');
 554  
 555          $mform->addElement('html', $OUTPUT->container($contents, 'contents'));
 556  
 557          $hasattempt = false;
 558          $disabled = '';
 559          $useranswers = array();
 560          if (isset($USER->modattempts[$lessonid]) && !empty($USER->modattempts[$lessonid])) {
 561              $hasattempt = true;
 562              $disabled = array('disabled' => 'disabled');
 563              $useranswers = explode(',', $USER->modattempts[$lessonid]->useranswer);
 564          }
 565  
 566          $options = new stdClass;
 567          $options->para = false;
 568          $options->noclean = true;
 569  
 570          $mform->addElement('hidden', 'id');
 571          $mform->setType('id', PARAM_INT);
 572  
 573          $mform->addElement('hidden', 'pageid');
 574          $mform->setType('pageid', PARAM_INT);
 575  
 576          foreach ($answers as $answer) {
 577              $mform->addElement('html', '<div class="answeroption">');
 578              $answerid = 'answer['.$answer->id.']';
 579              if ($hasattempt && in_array($answer->id, $useranswers)) {
 580                  $answerid = 'answer_'.$answer->id;
 581                  $mform->addElement('hidden', 'answer['.$answer->id.']', $answer->answer);
 582                  $mform->setType('answer['.$answer->id.']', PARAM_NOTAGS);
 583                  $mform->setDefault($answerid, true);
 584                  $mform->setDefault('answer['.$answer->id.']', true);
 585              }
 586              // NOTE: our silly checkbox supports only value '1' - we can not use it like the radiobox above!!!!!!
 587              $answer->answer = preg_replace('#>$#', '> ', $answer->answer);
 588              $mform->addElement('checkbox', $answerid, null, format_text($answer->answer, $answer->answerformat, $options), $disabled);
 589              $mform->setType($answerid, PARAM_INT);
 590  
 591              $mform->addElement('html', '</div>');
 592          }
 593  
 594          if ($hasattempt) {
 595              $this->add_action_buttons(null, get_string("nextpage", "lesson"));
 596          } else {
 597              $this->add_action_buttons(null, get_string("submit", "lesson"));
 598          }
 599      }
 600  
 601  }