[Summary view]

Differences Between: [Versions 39 and 310]

   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   * Short answer
  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   /** Short answer question type */
  29  define("LESSON_PAGE_SHORTANSWER",   "1");
  30  
  31  class lesson_page_type_shortanswer extends lesson_page {
  32  
  33      protected $type = lesson_page::TYPE_QUESTION;
  34      protected $typeidstring = 'shortanswer';
  35      protected $typeid = LESSON_PAGE_SHORTANSWER;
  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          $mform = new lesson_display_answer_form_shortanswer($CFG->wwwroot.'/mod/lesson/continue.php', array('contents'=>$this->get_contents(), 'lessonid'=>$this->lesson->id));
  53          $data = new stdClass;
  54          $data->id = $PAGE->cm->id;
  55          $data->pageid = $this->properties->id;
  56          if (isset($USER->modattempts[$this->lesson->id])) {
  57              $data->answer = s($attempt->useranswer);
  58          }
  59          $mform->set_data($data);
  60  
  61          // Trigger an event question viewed.
  62          $eventparams = array(
  63              'context' => context_module::instance($PAGE->cm->id),
  64              'objectid' => $this->properties->id,
  65              'other' => array(
  66                      'pagetype' => $this->get_typestring()
  67                  )
  68              );
  69  
  70          $event = \mod_lesson\event\question_viewed::create($eventparams);
  71          $event->trigger();
  72          return $mform->display();
  73      }
  74  
  75      /**
  76       * Creates answers for this page type.
  77       *
  78       * @param  object $properties The answer properties.
  79       */
  80      public function create_answers($properties) {
  81          if (isset($properties->enableotheranswers) && $properties->enableotheranswers) {
  82              $properties->response_editor = array_values($properties->response_editor);
  83              $properties->jumpto = array_values($properties->jumpto);
  84              $properties->score = array_values($properties->score);
  85              $wrongresponse = end($properties->response_editor);
  86              $wrongkey = key($properties->response_editor);
  87              $properties->answer_editor[$wrongkey] = LESSON_OTHER_ANSWERS;
  88          }
  89          parent::create_answers($properties);
  90      }
  91  
  92      /**
  93       * Update the answers for this page type.
  94       *
  95       * @param  object $properties The answer properties.
  96       * @param  context $context The context for this module.
  97       * @param  int $maxbytes The maximum bytes for any uploades.
  98       */
  99      public function update($properties, $context = null, $maxbytes = null) {
 100          if ($properties->enableotheranswers) {
 101              $properties->response_editor = array_values($properties->response_editor);
 102              $properties->jumpto = array_values($properties->jumpto);
 103              $properties->score = array_values($properties->score);
 104              $wrongresponse = end($properties->response_editor);
 105              $wrongkey = key($properties->response_editor);
 106              $properties->answer_editor[$wrongkey] = LESSON_OTHER_ANSWERS;
 107          }
 108          parent::update($properties, $context, $maxbytes);
 109      }
 110  
 111  
 112      public function check_answer() {
 113          global $CFG;
 114          $result = parent::check_answer();
 115  
 116          $mform = new lesson_display_answer_form_shortanswer($CFG->wwwroot.'/mod/lesson/continue.php', array('contents'=>$this->get_contents()));
 117          $data = $mform->get_data();
 118          require_sesskey();
 119  
 120          $studentanswer = trim($data->answer);
 121          if ($studentanswer === '') {
 122              $result->noanswer = true;
 123              return $result;
 124          }
 125  
 126          $i=0;
 127          $answers = $this->get_answers();
 128          foreach ($answers as $answer) {
 129              $answer = parent::rewrite_answers_urls($answer, false);
 130              $i++;
 131              // Applying PARAM_TEXT as it is applied to the answer submitted by the user.
 132              $expectedanswer  = clean_param($answer->answer, PARAM_TEXT);
 133              $ismatch         = false;
 134              $markit          = false;
 135              $useregexp       = ($this->qoption);
 136  
 137              if ($useregexp) { //we are using 'normal analysis', which ignores case
 138                  $ignorecase = '';
 139                  if (substr($expectedanswer, -2) == '/i') {
 140                      $expectedanswer = substr($expectedanswer, 0, -2);
 141                      $ignorecase = 'i';
 142                  }
 143              } else {
 144                  $expectedanswer = str_replace('*', '%@@%@@%', $expectedanswer);
 145                  $expectedanswer = preg_quote($expectedanswer, '/');
 146                  $expectedanswer = str_replace('%@@%@@%', '.*', $expectedanswer);
 147              }
 148              // see if user typed in any of the correct answers
 149              if ((!$this->lesson->custom && $this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) or ($this->lesson->custom && $answer->score > 0) ) {
 150                  if (!$useregexp) { // we are using 'normal analysis', which ignores case
 151                      if (preg_match('/^'.$expectedanswer.'$/i',$studentanswer)) {
 152                          $ismatch = true;
 153                      }
 154                  } else {
 155                      if (preg_match('/^'.$expectedanswer.'$/'.$ignorecase,$studentanswer)) {
 156                          $ismatch = true;
 157                      }
 158                  }
 159                  if ($ismatch == true) {
 160                      $result->correctanswer = true;
 161                  }
 162              } else {
 163                 if (!$useregexp) { //we are using 'normal analysis'
 164                      // see if user typed in any of the wrong answers; don't worry about case
 165                      if (preg_match('/^'.$expectedanswer.'$/i',$studentanswer)) {
 166                          $ismatch = true;
 167                      }
 168                  } else { // we are using regular expressions analysis
 169                      $startcode = substr($expectedanswer,0,2);
 170                      switch ($startcode){
 171                          //1- check for absence of required string in $studentanswer (coded by initial '--')
 172                          case "--":
 173                              $expectedanswer = substr($expectedanswer,2);
 174                              if (!preg_match('/^'.$expectedanswer.'$/'.$ignorecase,$studentanswer)) {
 175                                  $ismatch = true;
 176                              }
 177                              break;
 178                          //2- check for code for marking wrong strings (coded by initial '++')
 179                          case "++":
 180                              $expectedanswer=substr($expectedanswer,2);
 181                              $markit = true;
 182                              //check for one or several matches
 183                              if (preg_match_all('/'.$expectedanswer.'/'.$ignorecase,$studentanswer, $matches)) {
 184                                  $ismatch   = true;
 185                                  $nb        = count($matches[0]);
 186                                  $original  = array();
 187                                  $marked    = array();
 188                                  $fontStart = '<span class="incorrect matches">';
 189                                  $fontEnd   = '</span>';
 190                                  for ($i = 0; $i < $nb; $i++) {
 191                                      array_push($original,$matches[0][$i]);
 192                                      array_push($marked,$fontStart.$matches[0][$i].$fontEnd);
 193                                  }
 194                                  $studentanswer = str_replace($original, $marked, $studentanswer);
 195                              }
 196                              break;
 197                          //3- check for wrong answers belonging neither to -- nor to ++ categories
 198                          default:
 199                              if (preg_match('/^'.$expectedanswer.'$/'.$ignorecase,$studentanswer, $matches)) {
 200                                  $ismatch = true;
 201                              }
 202                              break;
 203                      }
 204                      $result->correctanswer = false;
 205                  }
 206              }
 207              if ($ismatch) {
 208                  $result->newpageid = $answer->jumpto;
 209                  $options = new stdClass();
 210                  $options->para = false;
 211                  $options->noclean = true;
 212                  $result->response = format_text($answer->response, $answer->responseformat, $options);
 213                  $result->answerid = $answer->id;
 214                  break; // quit answer analysis immediately after a match has been found
 215              }
 216          }
 217  
 218          // We could check here to see if we have a wrong answer jump to use.
 219          if ($result->answerid == 0) {
 220              // Use the all other answers jump details if it is set up.
 221              $lastanswer = end($answers);
 222              // Double check that this is the @#wronganswer#@ answer.
 223              if (strpos($lastanswer->answer, LESSON_OTHER_ANSWERS) !== false) {
 224                  $otheranswers = end($answers);
 225                  $result->newpageid = $otheranswers->jumpto;
 226                  $options = new stdClass();
 227                  $options->para = false;
 228                  $result->response = format_text($otheranswers->response, $otheranswers->responseformat, $options);
 229                  // Does this also need to do the jumpto_is_correct?
 230                  if ($this->lesson->custom) {
 231                      $result->correctanswer = ($otheranswers->score > 0);
 232                  }
 233                  $result->answerid = $otheranswers->id;
 234              }
 235          }
 236  
 237          $result->userresponse = $studentanswer;
 238          //clean student answer as it goes to output.
 239          $result->studentanswer = s($studentanswer);
 240          return $result;
 241      }
 242  
 243      public function option_description_string() {
 244          if ($this->properties->qoption) {
 245              return " - ".get_string("casesensitive", "lesson");
 246          }
 247          return parent::option_description_string();
 248      }
 249  
 250      public function display_answers(html_table $table) {
 251          $answers = $this->get_answers();
 252          $options = new stdClass;
 253          $options->noclean = true;
 254          $options->para = false;
 255          $i = 1;
 256          foreach ($answers as $answer) {
 257              $answer = parent::rewrite_answers_urls($answer, false);
 258              $cells = array();
 259              if ($this->lesson->custom && $answer->score > 0) {
 260                  // if the score is > 0, then it is correct
 261                  $cells[] = '<label class="correct">' . get_string('answer', 'lesson') . ' ' . $i . '</label>:';
 262              } else if ($this->lesson->custom) {
 263                  $cells[] = '<label>' . get_string('answer', 'lesson') . ' ' . $i . '</label>:';
 264              } else if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 265                  // underline correct answers
 266                  $cells[] = '<span class="correct">' . get_string('answer', 'lesson') . ' ' . $i . '</span>:' . "\n";
 267              } else {
 268                  $cells[] = '<label class="correct">' . get_string('answer', 'lesson') . ' ' . $i . '</label>:';
 269              }
 270              $cells[] = format_text($answer->answer, $answer->answerformat, $options);
 271              $table->data[] = new html_table_row($cells);
 272  
 273              $cells = array();
 274              $cells[] = '<label>' . get_string('response', 'lesson') . ' ' . $i . '</label>:';
 275              $cells[] = format_text($answer->response, $answer->responseformat, $options);
 276              $table->data[] = new html_table_row($cells);
 277  
 278              $cells = array();
 279              $cells[] = '<label>' . get_string('score', 'lesson') . '</label>:';
 280              $cells[] = $answer->score;
 281              $table->data[] = new html_table_row($cells);
 282  
 283              $cells = array();
 284              $cells[] = '<label>' . get_string('jump', 'lesson') . '</label>:';
 285              $cells[] = $this->get_jump_name($answer->jumpto);
 286              $table->data[] = new html_table_row($cells);
 287              if ($i === 1){
 288                  $table->data[count($table->data)-1]->cells[0]->style = 'width:20%;';
 289              }
 290              $i++;
 291          }
 292          return $table;
 293      }
 294      public function stats(array &$pagestats, $tries) {
 295          $temp = $this->lesson->get_last_attempt($tries);
 296          if (isset($pagestats[$temp->pageid][$temp->useranswer])) {
 297              $pagestats[$temp->pageid][$temp->useranswer]++;
 298          } else {
 299              $pagestats[$temp->pageid][$temp->useranswer] = 1;
 300          }
 301          if (isset($pagestats[$temp->pageid]["total"])) {
 302              $pagestats[$temp->pageid]["total"]++;
 303          } else {
 304              $pagestats[$temp->pageid]["total"] = 1;
 305          }
 306          return true;
 307      }
 308  
 309      public function report_answers($answerpage, $answerdata, $useranswer, $pagestats, &$i, &$n) {
 310          global $PAGE;
 311  
 312          $answers = $this->get_answers();
 313          $formattextdefoptions = new stdClass;
 314          $formattextdefoptions->para = false;  //I'll use it widely in this page
 315          foreach ($answers as $answer) {
 316              $answer = parent::rewrite_answers_urls($answer, false);
 317              if ($useranswer == null && $i == 0) {
 318                  // I have the $i == 0 because it is easier to blast through it all at once.
 319                  if (isset($pagestats[$this->properties->id])) {
 320                      $stats = $pagestats[$this->properties->id];
 321                      $total = $stats["total"];
 322                      unset($stats["total"]);
 323                      foreach ($stats as $valentered => $ntimes) {
 324                          $data = '<input type="text" size="50" disabled="disabled" class="form-control" ' .
 325                                  'readonly="readonly" value="'.s($valentered).'" />';
 326                          $percent = $ntimes / $total * 100;
 327                          $percent = round($percent, 2);
 328                          $percent .= "% ".get_string("enteredthis", "lesson");
 329                          $answerdata->answers[] = array($data, $percent);
 330                      }
 331                  } else {
 332                      $answerdata->answers[] = array(get_string("nooneansweredthisquestion", "lesson"), " ");
 333                  }
 334                  $i++;
 335              } else if ($useranswer != null && ($answer->id == $useranswer->answerid || $answer == end($answers))) {
 336                   // get in here when what the user entered is not one of the answers
 337                  $data = '<input type="text" size="50" disabled="disabled" class="form-control" ' .
 338                          'readonly="readonly" value="'.s($useranswer->useranswer).'">';
 339                  if (isset($pagestats[$this->properties->id][$useranswer->useranswer])) {
 340                      $percent = $pagestats[$this->properties->id][$useranswer->useranswer] / $pagestats[$this->properties->id]["total"] * 100;
 341                      $percent = round($percent, 2);
 342                      $percent .= "% ".get_string("enteredthis", "lesson");
 343                  } else {
 344                      $percent = get_string("nooneenteredthis", "lesson");
 345                  }
 346                  $answerdata->answers[] = array($data, $percent);
 347  
 348                  if ($answer->id == $useranswer->answerid) {
 349                      if ($answer->response == null) {
 350                          if ($useranswer->correct) {
 351                              $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 352                          } else {
 353                              $answerdata->response = get_string("thatsthewronganswer", "lesson");
 354                          }
 355                      } else {
 356                          $answerdata->response = $answer->response;
 357                      }
 358                      if ($this->lesson->custom) {
 359                          $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 360                      } elseif ($useranswer->correct) {
 361                          $answerdata->score = get_string("receivedcredit", "lesson");
 362                      } else {
 363                          $answerdata->score = get_string("didnotreceivecredit", "lesson");
 364                      }
 365                      // We have found the correct answer, do not process any more answers.
 366                      $answerpage->answerdata = $answerdata;
 367                      break;
 368                  } else {
 369                      $answerdata->response = get_string("thatsthewronganswer", "lesson");
 370                      if ($this->lesson->custom) {
 371                          $answerdata->score = get_string("pointsearned", "lesson").": 0";
 372                      } else {
 373                          $answerdata->score = get_string("didnotreceivecredit", "lesson");
 374                      }
 375                  }
 376              }
 377              $answerpage->answerdata = $answerdata;
 378          }
 379          return $answerpage;
 380      }
 381  
 382      /**
 383       * Make updates to the form data if required. In this case to put the all other answer data into the write section of the form.
 384       *
 385       * @param stdClass $data The form data to update.
 386       * @return stdClass The updated fom data.
 387       */
 388      public function update_form_data(stdClass $data) : stdClass {
 389          $answercount = count($this->get_answers());
 390          // Check for other answer entry.
 391          $lastanswer = $data->{'answer_editor[' . ($answercount - 1) . ']'};
 392          if (strpos($lastanswer, LESSON_OTHER_ANSWERS) !== false) {
 393              $data->{'answer_editor[' . ($this->lesson->maxanswers + 1) . ']'} =
 394                      $data->{'answer_editor[' . ($answercount - 1) . ']'};
 395              $data->{'response_editor[' . ($this->lesson->maxanswers + 1) . ']'} =
 396                      $data->{'response_editor[' . ($answercount - 1) . ']'};
 397              $data->{'jumpto[' . ($this->lesson->maxanswers + 1) . ']'} = $data->{'jumpto[' . ($answercount - 1) . ']'};
 398              $data->{'score[' . ($this->lesson->maxanswers + 1) . ']'} = $data->{'score[' . ($answercount - 1) . ']'};
 399              $data->enableotheranswers = true;
 400              // Unset the old values.
 401              unset($data->{'answer_editor[' . ($answercount - 1) . ']'});
 402              unset($data->{'response_editor[' . ($answercount - 1) . ']'});
 403              unset($data->{'jumpto[' . ($answercount - 1) . ']'});
 404              unset($data->{'score[' . ($answercount - 1) . ']'});
 405          }
 406          return $data;
 407      }
 408  }
 409  
 410  
 411  class lesson_add_page_form_shortanswer extends lesson_add_page_form_base {
 412      public $qtype = 'shortanswer';
 413      public $qtypestring = 'shortanswer';
 414      protected $answerformat = '';
 415      protected $responseformat = LESSON_ANSWER_HTML;
 416  
 417      public function custom_definition() {
 418  
 419          $this->_form->addElement('checkbox', 'qoption', get_string('options', 'lesson'), get_string('casesensitive', 'lesson')); //oh my, this is a regex option!
 420          $this->_form->setDefault('qoption', 0);
 421          $this->_form->addHelpButton('qoption', 'casesensitive', 'lesson');
 422  
 423          $answercount = $this->_customdata['lesson']->maxanswers;
 424          for ($i = 0; $i < $answercount; $i++) {
 425              $this->_form->addElement('header', 'answertitle'.$i, get_string('answer').' '.($i+1));
 426              // Only first answer is required.
 427              $this->add_answer($i, null, ($i < 1));
 428              $this->add_response($i);
 429              $this->add_jumpto($i, null, ($i == 0 ? LESSON_NEXTPAGE : LESSON_THISPAGE));
 430              $this->add_score($i, null, ($i===0)?1:0);
 431          }
 432  
 433          // Other answer jump.
 434          $this->_form->addElement('header', 'wronganswer', get_string('allotheranswers', 'lesson'));
 435          $newcount = $answercount + 1;
 436          $this->_form->addElement('advcheckbox', 'enableotheranswers', get_string('enabled', 'lesson'));
 437          $this->add_response($newcount);
 438          $this->add_jumpto($newcount, get_string('allotheranswersjump', 'lesson'), LESSON_NEXTPAGE);
 439          $this->add_score($newcount, get_string('allotheranswersscore', 'lesson'), 0);
 440      }
 441  }
 442  
 443  class lesson_display_answer_form_shortanswer extends moodleform {
 444  
 445      public function definition() {
 446          global $OUTPUT, $USER;
 447          $mform = $this->_form;
 448          $contents = $this->_customdata['contents'];
 449  
 450          $hasattempt = false;
 451          $attrs = array('size'=>'50', 'maxlength'=>'200');
 452          if (isset($this->_customdata['lessonid'])) {
 453              $lessonid = $this->_customdata['lessonid'];
 454              if (isset($USER->modattempts[$lessonid]->useranswer)) {
 455                  $attrs['readonly'] = 'readonly';
 456                  $hasattempt = true;
 457              }
 458          }
 459  
 460          $placeholder = false;
 461          if (preg_match('/_____+/', $contents, $matches)) {
 462              $placeholder = $matches[0];
 463              $contentsparts = explode( $placeholder, $contents, 2);
 464              $attrs['size'] = round(strlen($placeholder) * 1.1);
 465          }
 466  
 467          // Disable shortforms.
 468          $mform->setDisableShortforms();
 469  
 470          $mform->addElement('header', 'pageheader');
 471          $mform->addElement('hidden', 'id');
 472          $mform->setType('id', PARAM_INT);
 473  
 474          $mform->addElement('hidden', 'pageid');
 475          $mform->setType('pageid', PARAM_INT);
 476  
 477          if ($placeholder) {
 478              $contentsgroup = array();
 479              $contentsgroup[] = $mform->createElement('static', '', '', $contentsparts[0]);
 480              $contentsgroup[] = $mform->createElement('text', 'answer', '', $attrs);
 481              $contentsgroup[] = $mform->createElement('static', '', '', $contentsparts[1]);
 482              $mform->addGroup($contentsgroup, '', '', '', false);
 483          } else {
 484              $mform->addElement('html', $OUTPUT->container($contents, 'contents'));
 485              $mform->addElement('text', 'answer', get_string('youranswer', 'lesson'), $attrs);
 486  
 487          }
 488          $mform->setType('answer', PARAM_TEXT);
 489  
 490          if ($hasattempt) {
 491              $this->add_action_buttons(null, get_string("nextpage", "lesson"));
 492          } else {
 493              $this->add_action_buttons(null, get_string("submit", "lesson"));
 494          }
 495      }
 496  
 497  }