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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   * Numerical
  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  /** Numerical question type */
  29  define("LESSON_PAGE_NUMERICAL",     "8");
  30  
  31  class lesson_page_type_numerical extends lesson_page {
  32  
  33      protected $type = lesson_page::TYPE_QUESTION;
  34      protected $typeidstring = 'numerical';
  35      protected $typeid = LESSON_PAGE_NUMERICAL;
  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      public function check_answer() {
  75          global $CFG;
  76          $result = parent::check_answer();
  77  
  78          $mform = new lesson_display_answer_form_shortanswer($CFG->wwwroot.'/mod/lesson/continue.php', array('contents'=>$this->get_contents()));
  79          $data = $mform->get_data();
  80          require_sesskey();
  81  
  82          $formattextdefoptions = new stdClass();
  83          $formattextdefoptions->noclean = true;
  84          $formattextdefoptions->para = false;
  85  
  86          // set defaults
  87          $result->response = '';
  88          $result->newpageid = 0;
  89  
  90          if (isset($data->answer)) {
  91              // just doing default PARAM_RAW, not doing PARAM_INT because it could be a float
  92              $result->useranswer = (float)$data->answer;
  93          } else {
  94              $result->noanswer = true;
  95              return $result;
  96          }
  97          $result->studentanswer = $result->userresponse = $result->useranswer;
  98          $answers = $this->get_answers();
  99          foreach ($answers as $answer) {
 100              $answer = parent::rewrite_answers_urls($answer);
 101              if (strpos($answer->answer, ':')) {
 102                  // there's a pairs of values
 103                  list($min, $max) = explode(':', $answer->answer);
 104                  $minimum = (float) $min;
 105                  $maximum = (float) $max;
 106              } else {
 107                  // there's only one value
 108                  $minimum = (float) $answer->answer;
 109                  $maximum = $minimum;
 110              }
 111              if (($result->useranswer >= $minimum) && ($result->useranswer <= $maximum)) {
 112                  $result->newpageid = $answer->jumpto;
 113                  $result->response = format_text($answer->response, $answer->responseformat, $formattextdefoptions);
 114                  if ($this->lesson->jumpto_is_correct($this->properties->id, $result->newpageid)) {
 115                      $result->correctanswer = true;
 116                  }
 117                  if ($this->lesson->custom) {
 118                      if ($answer->score > 0) {
 119                          $result->correctanswer = true;
 120                      } else {
 121                          $result->correctanswer = false;
 122                      }
 123                  }
 124                  $result->answerid = $answer->id;
 125                  return $result;
 126              }
 127          }
 128          return $result;
 129      }
 130  
 131      public function display_answers(html_table $table) {
 132          $answers = $this->get_answers();
 133          $options = new stdClass;
 134          $options->noclean = true;
 135          $options->para = false;
 136          $i = 1;
 137          foreach ($answers as $answer) {
 138              $answer = parent::rewrite_answers_urls($answer, false);
 139              $cells = array();
 140              if ($this->lesson->custom && $answer->score > 0) {
 141                  // if the score is > 0, then it is correct
 142                  $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 143              } else if ($this->lesson->custom) {
 144                  $cells[] = '<span class="label">'.get_string("answer", "lesson")." $i</span>: \n";
 145              } else if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
 146                  // underline correct answers
 147                  $cells[] = '<span class="correct">'.get_string("answer", "lesson")." $i</span>: \n";
 148              } else {
 149                  $cells[] = '<span class="labelcorrect">'.get_string("answer", "lesson")." $i</span>: \n";
 150              }
 151              $cells[] = format_text($answer->answer, $answer->answerformat, $options);
 152              $table->data[] = new html_table_row($cells);
 153  
 154              $cells = array();
 155              $cells[] = "<span class=\"label\">".get_string("response", "lesson")." $i</span>";
 156              $cells[] = format_text($answer->response, $answer->responseformat, $options);
 157              $table->data[] = new html_table_row($cells);
 158  
 159              $cells = array();
 160              $cells[] = "<span class=\"label\">".get_string("score", "lesson").'</span>';
 161              $cells[] = $answer->score;
 162              $table->data[] = new html_table_row($cells);
 163  
 164              $cells = array();
 165              $cells[] = "<span class=\"label\">".get_string("jump", "lesson").'</span>';
 166              $cells[] = $this->get_jump_name($answer->jumpto);
 167              $table->data[] = new html_table_row($cells);
 168              if ($i === 1){
 169                  $table->data[count($table->data)-1]->cells[0]->style = 'width:20%;';
 170              }
 171              $i++;
 172          }
 173          return $table;
 174      }
 175      public function stats(array &$pagestats, $tries) {
 176          if(count($tries) > $this->lesson->maxattempts) { // if there are more tries than the max that is allowed, grab the last "legal" attempt
 177              $temp = $tries[$this->lesson->maxattempts - 1];
 178          } else {
 179              // else, user attempted the question less than the max, so grab the last one
 180              $temp = end($tries);
 181          }
 182          if (isset($pagestats[$temp->pageid][$temp->useranswer])) {
 183              $pagestats[$temp->pageid][$temp->useranswer]++;
 184          } else {
 185              $pagestats[$temp->pageid][$temp->useranswer] = 1;
 186          }
 187          if (isset($pagestats[$temp->pageid]["total"])) {
 188              $pagestats[$temp->pageid]["total"]++;
 189          } else {
 190              $pagestats[$temp->pageid]["total"] = 1;
 191          }
 192          return true;
 193      }
 194  
 195      public function report_answers($answerpage, $answerdata, $useranswer, $pagestats, &$i, &$n) {
 196          $answers = $this->get_answers();
 197          $formattextdefoptions = new stdClass;
 198          $formattextdefoptions->para = false;  //I'll use it widely in this page
 199          foreach ($answers as $answer) {
 200              if ($useranswer == null && $i == 0) {
 201                  // I have the $i == 0 because it is easier to blast through it all at once.
 202                  if (isset($pagestats[$this->properties->id])) {
 203                      $stats = $pagestats[$this->properties->id];
 204                      $total = $stats["total"];
 205                      unset($stats["total"]);
 206                      foreach ($stats as $valentered => $ntimes) {
 207                          $data = '<input type="text" size="50" disabled="disabled" readonly="readonly" value="'.s($valentered).'" />';
 208                          $percent = $ntimes / $total * 100;
 209                          $percent = round($percent, 2);
 210                          $percent .= "% ".get_string("enteredthis", "lesson");
 211                          $answerdata->answers[] = array($data, $percent);
 212                      }
 213                  } else {
 214                      $answerdata->answers[] = array(get_string("nooneansweredthisquestion", "lesson"), " ");
 215                  }
 216                  $i++;
 217              } else if ($useranswer != null && ($answer->id == $useranswer->answerid || ($answer == end($answers) && empty($answerdata)))) {
 218                   // get in here when what the user entered is not one of the answers
 219                  $data = '<input type="text" size="50" disabled="disabled" readonly="readonly" value="'.s($useranswer->useranswer).'">';
 220                  if (isset($pagestats[$this->properties->id][$useranswer->useranswer])) {
 221                      $percent = $pagestats[$this->properties->id][$useranswer->useranswer] / $pagestats[$this->properties->id]["total"] * 100;
 222                      $percent = round($percent, 2);
 223                      $percent .= "% ".get_string("enteredthis", "lesson");
 224                  } else {
 225                      $percent = get_string("nooneenteredthis", "lesson");
 226                  }
 227                  $answerdata->answers[] = array($data, $percent);
 228  
 229                  if ($answer->id == $useranswer->answerid) {
 230                      if ($answer->response == null) {
 231                          if ($useranswer->correct) {
 232                              $answerdata->response = get_string("thatsthecorrectanswer", "lesson");
 233                          } else {
 234                              $answerdata->response = get_string("thatsthewronganswer", "lesson");
 235                          }
 236                      } else {
 237                          $answerdata->response = $answer->response;
 238                      }
 239                      if ($this->lesson->custom) {
 240                          $answerdata->score = get_string("pointsearned", "lesson").": ".$answer->score;
 241                      } elseif ($useranswer->correct) {
 242                          $answerdata->score = get_string("receivedcredit", "lesson");
 243                      } else {
 244                          $answerdata->score = get_string("didnotreceivecredit", "lesson");
 245                      }
 246                  } else {
 247                      $answerdata->response = get_string("thatsthewronganswer", "lesson");
 248                      if ($this->lesson->custom) {
 249                          $answerdata->score = get_string("pointsearned", "lesson").": 0";
 250                      } else {
 251                          $answerdata->score = get_string("didnotreceivecredit", "lesson");
 252                      }
 253                  }
 254              }
 255              $answerpage->answerdata = $answerdata;
 256          }
 257          return $answerpage;
 258      }
 259  }
 260  
 261  class lesson_add_page_form_numerical extends lesson_add_page_form_base {
 262  
 263      public $qtype = 'numerical';
 264      public $qtypestring = 'numerical';
 265      protected $answerformat = '';
 266      protected $responseformat = LESSON_ANSWER_HTML;
 267  
 268      public function custom_definition() {
 269          for ($i = 0; $i < $this->_customdata['lesson']->maxanswers; $i++) {
 270              $this->_form->addElement('header', 'answertitle'.$i, get_string('answer').' '.($i+1));
 271              $this->add_answer($i, null, ($i < 1));
 272              $this->add_response($i);
 273              $this->add_jumpto($i, null, ($i == 0 ? LESSON_NEXTPAGE : LESSON_THISPAGE));
 274              $this->add_score($i, null, ($i===0)?1:0);
 275          }
 276      }
 277  }
 278  
 279  class lesson_display_answer_form_numerical extends moodleform {
 280  
 281      public function definition() {
 282          global $USER, $OUTPUT;
 283          $mform = $this->_form;
 284          $contents = $this->_customdata['contents'];
 285  
 286          // Disable shortforms.
 287          $mform->setDisableShortforms();
 288  
 289          $mform->addElement('header', 'pageheader');
 290  
 291          $mform->addElement('html', $OUTPUT->container($contents, 'contents'));
 292  
 293          $hasattempt = false;
 294          $attrs = array('size'=>'50', 'maxlength'=>'200');
 295          if (isset($this->_customdata['lessonid'])) {
 296              $lessonid = $this->_customdata['lessonid'];
 297              if (isset($USER->modattempts[$lessonid]->useranswer)) {
 298                  $attrs['readonly'] = 'readonly';
 299                  $hasattempt = true;
 300              }
 301          }
 302          $options = new stdClass;
 303          $options->para = false;
 304          $options->noclean = true;
 305  
 306          $mform->addElement('hidden', 'id');
 307          $mform->setType('id', PARAM_INT);
 308  
 309          $mform->addElement('hidden', 'pageid');
 310          $mform->setType('pageid', PARAM_INT);
 311  
 312          $mform->addElement('text', 'answer', get_string('youranswer', 'lesson'), $attrs);
 313          $mform->setType('answer', PARAM_FLOAT);
 314  
 315          if ($hasattempt) {
 316              $this->add_action_buttons(null, get_string("nextpage", "lesson"));
 317          } else {
 318              $this->add_action_buttons(null, get_string("submit", "lesson"));
 319          }
 320      }
 321  
 322  }