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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   * True/false
  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  /** True/False question type */
  29  define("LESSON_PAGE_TRUEFALSE",     "2");
  30  
  31  class lesson_page_type_truefalse extends lesson_page {
  32  
  33      protected $type = lesson_page::TYPE_QUESTION;
  34      protected $typeidstring = 'truefalse';
  35      protected $typeid = LESSON_PAGE_TRUEFALSE;
  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          $answers = $this->get_answers();
  53          foreach ($answers as $key => $answer) {
  54              $answers[$key] = parent::rewrite_answers_urls($answer);
  55          }
  56          shuffle($answers);
  57  
  58          $params = array('answers'=>$answers, 'lessonid'=>$this->lesson->id, 'contents'=>$this->get_contents(), 'attempt'=>$attempt);
  59          $mform = new lesson_display_answer_form_truefalse($CFG->wwwroot.'/mod/lesson/continue.php', $params);
  60          $data = new stdClass;
  61          $data->id = $PAGE->cm->id;
  62          $data->pageid = $this->properties->id;
  63          $mform->set_data($data);
  64          return $mform->display();
  65      }
  66      public function check_answer() {
  67          global $DB, $CFG;
  68          $formattextdefoptions = new stdClass();
  69          $formattextdefoptions->noclean = true;
  70          $formattextdefoptions->para = false;
  71  
  72          $answers = $this->get_answers();
  73          shuffle($answers);
  74          $params = array('answers'=>$answers, 'lessonid'=>$this->lesson->id, 'contents'=>$this->get_contents());
  75          $mform = new lesson_display_answer_form_truefalse($CFG->wwwroot.'/mod/lesson/continue.php', $params);
  76          $data = $mform->get_data();
  77          require_sesskey();
  78  
  79          $result = parent::check_answer();
  80  
  81          if (empty($data->answerid)) {
  82              $result->noanswer = true;
  83              return $result;
  84          }
  85          $result->answerid = $data->answerid;
  86          $answer = $DB->get_record("lesson_answers", array("id" => $result->answerid), '*', MUST_EXIST);
  87          $answer = parent::rewrite_answers_urls($answer);
  88          if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
  89              $result->correctanswer = true;
  90          }
  91          if ($this->lesson->custom) {
  92              if ($answer->score > 0) {
  93                  $result->correctanswer = true;
  94              } else {
  95                  $result->correctanswer = false;
  96              }
  97          }
  98          $result->newpageid = $answer->jumpto;
  99          $result->response  = format_text($answer->response, $answer->responseformat, $formattextdefoptions);
 100          $result->studentanswer = $result->userresponse = $answer->answer;
 101          return $result;
 102      }
 103  
 104      public function display_answers(html_table $table) {
 105          $answers = $this->get_answers();
 106          $options = new stdClass();
 107          $options->noclean = true;
 108          $options->para = false;
 109          $i = 1;
 110          foreach ($answers as $answer) {
 111              $answer = parent::rewrite_answers_urls($answer);
 112              $cells = array();
 113              if ($this->lesson->custom && $answer->score > 0) {
 114                  // if the score is > 0, then it is correct
 115                  $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 116              } else if ($this->lesson->custom) {
 117                  $cells[] = '<span class="label">'.get_string("answer", "lesson")." $i</span>: \n";
 118              } else if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 119                  // underline correct answers
 120                  $cells[] = '<span class="correct">'.get_string("answer", "lesson")." $i</span>: \n";
 121              } else {
 122                  $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 123              }
 124              $cells[] = format_text($answer->answer, $answer->answerformat, $options);
 125              $table->data[] = new html_table_row($cells);
 126  
 127              $cells = array();
 128              $cells[] = "<span class=\"label\">".get_string("response", "lesson")." $i</span>";
 129              $cells[] = format_text($answer->response, $answer->responseformat, $options);
 130              $table->data[] = new html_table_row($cells);
 131  
 132              $cells = array();
 133              $cells[] = "<span class=\"label\">".get_string("score", "lesson").'</span>';
 134              $cells[] = $answer->score;
 135              $table->data[] = new html_table_row($cells);
 136  
 137              $cells = array();
 138              $cells[] = "<span class=\"label\">".get_string("jump", "lesson").'</span>';
 139              $cells[] = $this->get_jump_name($answer->jumpto);
 140              $table->data[] = new html_table_row($cells);
 141  
 142              if ($i === 1){
 143                  $table->data[count($table->data)-1]->cells[0]->style = 'width:20%;';
 144              }
 145  
 146              $i++;
 147          }
 148          return $table;
 149      }
 150  
 151      /**
 152       * Updates the page and its answers
 153       *
 154       * @global moodle_database $DB
 155       * @global moodle_page $PAGE
 156       * @param stdClass $properties
 157       * @return bool
 158       */
 159      public function update($properties, $context = null, $maxbytes = null) {
 160          global $DB, $PAGE;
 161          $answers  = $this->get_answers();
 162          $properties->id = $this->properties->id;
 163          $properties->lessonid = $this->lesson->id;
 164          $properties->timemodified = time();
 165          $properties = file_postupdate_standard_editor($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);
 166          $DB->update_record("lesson_pages", $properties);
 167  
 168          // need to reset offset for correct and wrong responses
 169          $this->lesson->maxanswers = 2;
 170          for ($i = 0; $i < $this->lesson->maxanswers; $i++) {
 171              if (!array_key_exists($i, $this->answers)) {
 172                  $this->answers[$i] = new stdClass;
 173                  $this->answers[$i]->lessonid = $this->lesson->id;
 174                  $this->answers[$i]->pageid = $this->id;
 175                  $this->answers[$i]->timecreated = $this->timecreated;
 176              }
 177  
 178              if (!empty($properties->answer_editor[$i]) && is_array($properties->answer_editor[$i])) {
 179                  $this->answers[$i]->answer = $properties->answer_editor[$i]['text'];
 180                  $this->answers[$i]->answerformat = $properties->answer_editor[$i]['format'];
 181              }
 182  
 183              if (!empty($properties->response_editor[$i]) && is_array($properties->response_editor[$i])) {
 184                  $this->answers[$i]->response = $properties->response_editor[$i]['text'];
 185                  $this->answers[$i]->responseformat = $properties->response_editor[$i]['format'];
 186              }
 187  
 188              // we don't need to check for isset here because properties called it's own isset method.
 189              if ($this->answers[$i]->answer != '') {
 190                  if (isset($properties->jumpto[$i])) {
 191                      $this->answers[$i]->jumpto = $properties->jumpto[$i];
 192                  }
 193                  if ($this->lesson->custom && isset($properties->score[$i])) {
 194                      $this->answers[$i]->score = $properties->score[$i];
 195                  }
 196                  if (!isset($this->answers[$i]->id)) {
 197                      $this->answers[$i]->id =  $DB->insert_record("lesson_answers", $this->answers[$i]);
 198                  } else {
 199                      $DB->update_record("lesson_answers", $this->answers[$i]->properties());
 200                  }
 201                  // Save files in answers and responses.
 202                  $this->save_answers_files($context, $maxbytes, $this->answers[$i],
 203                          $properties->answer_editor[$i], $properties->response_editor[$i]);
 204              } else if (isset($this->answers[$i]->id)) {
 205                  $DB->delete_records('lesson_answers', array('id'=>$this->answers[$i]->id));
 206                  unset($this->answers[$i]);
 207              }
 208          }
 209          return true;
 210      }
 211  
 212      public function stats(array &$pagestats, $tries) {
 213          if(count($tries) > $this->lesson->maxattempts) { // if there are more tries than the max that is allowed, grab the last "legal" attempt
 214              $temp = $tries[$this->lesson->maxattempts - 1];
 215          } else {
 216              // else, user attempted the question less than the max, so grab the last one
 217              $temp = end($tries);
 218          }
 219          if ($this->properties->qoption) {
 220              $userresponse = explode(",", $temp->useranswer);
 221              foreach ($userresponse as $response) {
 222                  if (isset($pagestats[$temp->pageid][$response])) {
 223                      $pagestats[$temp->pageid][$response]++;
 224                  } else {
 225                      $pagestats[$temp->pageid][$response] = 1;
 226                  }
 227              }
 228          } else {
 229              if (isset($pagestats[$temp->pageid][$temp->answerid])) {
 230                  $pagestats[$temp->pageid][$temp->answerid]++;
 231              } else {
 232                  $pagestats[$temp->pageid][$temp->answerid] = 1;
 233              }
 234          }
 235          if (isset($pagestats[$temp->pageid]["total"])) {
 236              $pagestats[$temp->pageid]["total"]++;
 237          } else {
 238              $pagestats[$temp->pageid]["total"] = 1;
 239          }
 240          return true;
 241      }
 242  
 243      public function report_answers($answerpage, $answerdata, $useranswer, $pagestats, &$i, &$n) {
 244          $answers = $this->get_answers();
 245          $formattextdefoptions = new stdClass(); //I'll use it widely in this page
 246          $formattextdefoptions->para = false;
 247          $formattextdefoptions->noclean = true;
 248          foreach ($answers as $answer) {
 249              $answer = parent::rewrite_answers_urls($answer);
 250              if ($this->properties->qoption) {
 251                  if ($useranswer == null) {
 252                      $userresponse = array();
 253                  } else {
 254                      $userresponse = explode(",", $useranswer->useranswer);
 255                  }
 256                  if (in_array($answer->id, $userresponse)) {
 257                      // make checked
 258                      $data = "<input  readonly=\"readonly\" disabled=\"disabled\" name=\"answer[$i]\" checked=\"checked\" type=\"checkbox\" value=\"1\" />";
 259                      if (!isset($answerdata->response)) {
 260                          if ($answer->response == null) {
 261                              if ($useranswer->correct) {
 262                                  $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 263                              } else {
 264                                  $answerdata->response = get_string("thatsthewronganswer", "lesson");
 265                              }
 266                          } else {
 267                              $answerdata->response = format_text($answer->response, $answer->responseformat, $formattextdefoptions);
 268                          }
 269                      }
 270                      if (!isset($answerdata->score)) {
 271                          if ($this->lesson->custom) {
 272                              $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 273                          } elseif ($useranswer->correct) {
 274                              $answerdata->score = get_string("receivedcredit", "lesson");
 275                          } else {
 276                              $answerdata->score = get_string("didnotreceivecredit", "lesson");
 277                          }
 278                      }
 279                  } else {
 280                      // unchecked
 281                      $data = "<input type=\"checkbox\" readonly=\"readonly\" name=\"answer[$i]\" value=\"0\" disabled=\"disabled\" />";
 282                  }
 283                  if (($answer->score > 0 && $this->lesson->custom) || ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto) && !$this->lesson->custom)) {
 284                      $data .= "<div class=highlight>".format_text($answer->answer, $answer->answerformat, $formattextdefoptions)."</div>";
 285                  } else {
 286                      $data .= format_text($answer->answer, $answer->answerformat, $formattextdefoptions);
 287                  }
 288              } else {
 289                  if ($useranswer != null and $answer->id == $useranswer->answerid) {
 290                      // make checked
 291                      $data = "<input  readonly=\"readonly\" disabled=\"disabled\" name=\"answer[$i]\" checked=\"checked\" type=\"checkbox\" value=\"1\" />";
 292                      if ($answer->response == null) {
 293                          if ($useranswer->correct) {
 294                              $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 295                          } else {
 296                              $answerdata->response = get_string("thatsthewronganswer", "lesson");
 297                          }
 298                      } else {
 299                          $answerdata->response = format_text($answer->response, $answer->responseformat, $formattextdefoptions);
 300                      }
 301                      if ($this->lesson->custom) {
 302                          $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 303                      } elseif ($useranswer->correct) {
 304                          $answerdata->score = get_string("receivedcredit", "lesson");
 305                      } else {
 306                          $answerdata->score = get_string("didnotreceivecredit", "lesson");
 307                      }
 308                  } else {
 309                      // unchecked
 310                      $data = "<input type=\"checkbox\" readonly=\"readonly\" name=\"answer[$i]\" value=\"0\" disabled=\"disabled\" />";
 311                  }
 312                  if (($answer->score > 0 && $this->lesson->custom) || ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto) && !$this->lesson->custom)) {
 313                      $data .= "<div class=\"highlight\">".format_text($answer->answer, $answer->answerformat, $formattextdefoptions)."</div>";
 314                  } else {
 315                      $data .= format_text($answer->answer, $answer->answerformat, $formattextdefoptions);
 316                  }
 317              }
 318              if (isset($pagestats[$this->properties->id][$answer->id])) {
 319                  $percent = $pagestats[$this->properties->id][$answer->id] / $pagestats[$this->properties->id]["total"] * 100;
 320                  $percent = round($percent, 2);
 321                  $percent .= "% ".get_string("checkedthisone", "lesson");
 322              } else {
 323                  $percent = get_string("noonecheckedthis", "lesson");
 324              }
 325  
 326              $answerdata->answers[] = array($data, $percent);
 327              $answerpage->answerdata = $answerdata;
 328          }
 329          return $answerpage;
 330      }
 331  }
 332  
 333  class lesson_add_page_form_truefalse extends lesson_add_page_form_base {
 334  
 335      public $qtype = 'truefalse';
 336      public $qtypestring = 'truefalse';
 337  
 338      public function custom_definition() {
 339          $this->_form->addElement('header', 'answertitle0', get_string('correctresponse', 'lesson'));
 340          $this->add_answer(0, null, true);
 341          $this->add_response(0);
 342          $this->add_jumpto(0, get_string('correctanswerjump', 'lesson'), LESSON_NEXTPAGE);
 343          $this->add_score(0, get_string('correctanswerscore', 'lesson'), 1);
 344  
 345          $this->_form->addElement('header', 'answertitle1', get_string('wrongresponse', 'lesson'));
 346          $this->add_answer(1, null, true);
 347          $this->add_response(1);
 348          $this->add_jumpto(1, get_string('wronganswerjump', 'lesson'), LESSON_THISPAGE);
 349          $this->add_score(1, get_string('wronganswerscore', 'lesson'), 0);
 350      }
 351  }
 352  
 353  class lesson_display_answer_form_truefalse extends moodleform {
 354  
 355      public function definition() {
 356          global $USER, $OUTPUT;
 357          $mform = $this->_form;
 358          $answers = $this->_customdata['answers'];
 359          $lessonid = $this->_customdata['lessonid'];
 360          $contents = $this->_customdata['contents'];
 361          if (array_key_exists('attempt', $this->_customdata)) {
 362              $attempt = $this->_customdata['attempt'];
 363          } else {
 364              $attempt = new stdClass();
 365              $attempt->answerid = null;
 366          }
 367  
 368          $mform->addElement('header', 'pageheader');
 369  
 370          $mform->addElement('html', $OUTPUT->container($contents, 'contents'));
 371  
 372          $hasattempt = false;
 373          $disabled = '';
 374          if (isset($USER->modattempts[$lessonid]) && !empty($USER->modattempts[$lessonid])) {
 375              $hasattempt = true;
 376              $disabled = array('disabled' => 'disabled');
 377          }
 378  
 379          $options = new stdClass();
 380          $options->para = false;
 381          $options->noclean = true;
 382  
 383          $mform->addElement('hidden', 'id');
 384          $mform->setType('id', PARAM_INT);
 385  
 386          $mform->addElement('hidden', 'pageid');
 387          $mform->setType('pageid', PARAM_INT);
 388  
 389          $i = 0;
 390          foreach ($answers as $answer) {
 391              $mform->addElement('html', '<div class="answeroption">');
 392              $ansid = 'answerid';
 393              if ($hasattempt) {
 394                  $ansid = 'answer_id';
 395              }
 396  
 397              $mform->addElement('radio', $ansid, null, format_text($answer->answer, $answer->answerformat, $options), $answer->id, $disabled);
 398              $mform->setType($ansid, PARAM_INT);
 399              if ($hasattempt && $answer->id == $USER->modattempts[$lessonid]->answerid) {
 400                  $mform->setDefault($ansid, $attempt->answerid);
 401                  $mform->addElement('hidden', 'answerid', $answer->id);
 402                  $mform->setType('answerid', PARAM_INT);
 403              }
 404              $mform->addElement('html', '</div>');
 405              $i++;
 406          }
 407  
 408          if ($hasattempt) {
 409              $this->add_action_buttons(null, get_string("nextpage", "lesson"));
 410          } else {
 411              $this->add_action_buttons(null, get_string("submit", "lesson"));
 412          }
 413  
 414      }
 415  
 416  }