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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  defined('MOODLE_INTERNAL') OR die('not allowed');
  18  require_once($CFG->dirroot.'/mod/feedback/item/feedback_item_class.php');
  19  
  20  define('FEEDBACK_MULTICHOICE_TYPE_SEP', '>>>>>');
  21  define('FEEDBACK_MULTICHOICE_LINE_SEP', '|');
  22  define('FEEDBACK_MULTICHOICE_ADJUST_SEP', '<<<<<');
  23  define('FEEDBACK_MULTICHOICE_IGNOREEMPTY', 'i');
  24  define('FEEDBACK_MULTICHOICE_HIDENOSELECT', 'h');
  25  
  26  class feedback_item_multichoice extends feedback_item_base {
  27      protected $type = "multichoice";
  28  
  29      public function build_editform($item, $feedback, $cm) {
  30          global $DB, $CFG;
  31          require_once ('multichoice_form.php');
  32  
  33          //get the lastposition number of the feedback_items
  34          $position = $item->position;
  35          $lastposition = $DB->count_records('feedback_item', array('feedback'=>$feedback->id));
  36          if ($position == -1) {
  37              $i_formselect_last = $lastposition + 1;
  38              $i_formselect_value = $lastposition + 1;
  39              $item->position = $lastposition + 1;
  40          } else {
  41              $i_formselect_last = $lastposition;
  42              $i_formselect_value = $item->position;
  43          }
  44          //the elements for position dropdownlist
  45          $positionlist = array_slice(range(0, $i_formselect_last), 1, $i_formselect_last, true);
  46  
  47          $item->presentation = empty($item->presentation) ? '' : $item->presentation;
  48          $info = $this->get_info($item);
  49  
  50          $item->ignoreempty = $this->ignoreempty($item);
  51          $item->hidenoselect = $this->hidenoselect($item);
  52  
  53          //all items for dependitem
  54          $feedbackitems = feedback_get_depend_candidates_for_item($feedback, $item);
  55          $commonparams = array('cmid'=>$cm->id,
  56                               'id'=>isset($item->id) ? $item->id : null,
  57                               'typ'=>$item->typ,
  58                               'items'=>$feedbackitems,
  59                               'feedback'=>$feedback->id);
  60  
  61          //build the form
  62          $customdata = array('item' => $item,
  63                              'common' => $commonparams,
  64                              'positionlist' => $positionlist,
  65                              'position' => $position,
  66                              'info' => $info);
  67  
  68          $this->item_form = new feedback_multichoice_form('edit_item.php', $customdata);
  69      }
  70  
  71      public function save_item() {
  72          global $DB;
  73  
  74          if (!$this->get_data()) {
  75              return false;
  76          }
  77          $item = $this->item;
  78  
  79          if (isset($item->clone_item) AND $item->clone_item) {
  80              $item->id = ''; //to clone this item
  81              $item->position++;
  82          }
  83  
  84          $this->set_ignoreempty($item, $item->ignoreempty);
  85          $this->set_hidenoselect($item, $item->hidenoselect);
  86  
  87          $item->hasvalue = $this->get_hasvalue();
  88          if (!$item->id) {
  89              $item->id = $DB->insert_record('feedback_item', $item);
  90          } else {
  91              $DB->update_record('feedback_item', $item);
  92          }
  93  
  94          return $DB->get_record('feedback_item', array('id'=>$item->id));
  95      }
  96  
  97  
  98      //gets an array with three values(typ, name, XXX)
  99      //XXX is an object with answertext, answercount and quotient
 100  
 101      /**
 102       * Helper function for collected data, both for analysis page and export to excel
 103       *
 104       * @param stdClass $item the db-object from feedback_item
 105       * @param int $groupid
 106       * @param int $courseid
 107       * @return array|null
 108       */
 109      protected function get_analysed($item, $groupid = false, $courseid = false) {
 110          $info = $this->get_info($item);
 111  
 112          $analysed_item = array();
 113          $analysed_item[] = $item->typ;
 114          $analysed_item[] = format_string($item->name);
 115  
 116          //get the possible answers
 117          $answers = null;
 118          $answers = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
 119          if (!is_array($answers)) {
 120              return null;
 121          }
 122  
 123          //get the values
 124          $values = feedback_get_group_values($item, $groupid, $courseid, $this->ignoreempty($item));
 125          if (!$values) {
 126              return null;
 127          }
 128  
 129          //get answertext, answercount and quotient for each answer
 130          $analysed_answer = array();
 131          if ($info->subtype == 'c') {
 132              $sizeofanswers = count($answers);
 133              for ($i = 1; $i <= $sizeofanswers; $i++) {
 134                  $ans = new stdClass();
 135                  $ans->answertext = $answers[$i-1];
 136                  $ans->answercount = 0;
 137                  foreach ($values as $value) {
 138                      //ist die Antwort gleich dem index der Antworten + 1?
 139                      $vallist = explode(FEEDBACK_MULTICHOICE_LINE_SEP, $value->value);
 140                      foreach ($vallist as $val) {
 141                          if ($val == $i) {
 142                              $ans->answercount++;
 143                          }
 144                      }
 145                  }
 146                  $ans->quotient = $ans->answercount / count($values);
 147                  $analysed_answer[] = $ans;
 148              }
 149          } else {
 150              $sizeofanswers = count($answers);
 151              for ($i = 1; $i <= $sizeofanswers; $i++) {
 152                  $ans = new stdClass();
 153                  $ans->answertext = $answers[$i-1];
 154                  $ans->answercount = 0;
 155                  foreach ($values as $value) {
 156                      //ist die Antwort gleich dem index der Antworten + 1?
 157                      if ($value->value == $i) {
 158                          $ans->answercount++;
 159                      }
 160                  }
 161                  $ans->quotient = $ans->answercount / count($values);
 162                  $analysed_answer[] = $ans;
 163              }
 164          }
 165          $analysed_item[] = $analysed_answer;
 166          return $analysed_item;
 167      }
 168  
 169      public function get_printval($item, $value) {
 170          $info = $this->get_info($item);
 171  
 172          $printval = '';
 173  
 174          if (!isset($value->value)) {
 175              return $printval;
 176          }
 177  
 178          $presentation = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
 179  
 180          if ($info->subtype == 'c') {
 181              $vallist = array_values(explode (FEEDBACK_MULTICHOICE_LINE_SEP, $value->value));
 182              $sizeofvallist = count($vallist);
 183              $sizeofpresentation = count($presentation);
 184              for ($i = 0; $i < $sizeofvallist; $i++) {
 185                  for ($k = 0; $k < $sizeofpresentation; $k++) {
 186                      if ($vallist[$i] == ($k + 1)) {//Die Werte beginnen bei 1, das Array aber mit 0
 187                          $printval .= trim(format_string($presentation[$k])) . chr(10);
 188                          break;
 189                      }
 190                  }
 191              }
 192          } else {
 193              $index = 1;
 194              foreach ($presentation as $pres) {
 195                  if ($value->value == $index) {
 196                      $printval = format_string($pres);
 197                      break;
 198                  }
 199                  $index++;
 200              }
 201          }
 202          return $printval;
 203      }
 204  
 205      public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
 206          global $OUTPUT;
 207  
 208          $analysed_item = $this->get_analysed($item, $groupid, $courseid);
 209          if ($analysed_item) {
 210              $itemname = $analysed_item[1];
 211              echo "<table class=\"analysis itemtype_{$item->typ}\">";
 212              echo '<tr><th class="text-left">';
 213              echo $itemnr . ' ';
 214              if (strval($item->label) !== '') {
 215                  echo '('. format_string($item->label).') ';
 216              }
 217              echo format_string($itemname);
 218              echo '</th></tr>';
 219  
 220              $analysed_vals = $analysed_item[2];
 221              $count = 0;
 222              $data = [];
 223              foreach ($analysed_vals as $val) {
 224                  $quotient = format_float($val->quotient * 100, 2);
 225                  $strquotient = '';
 226                  if ($val->quotient > 0) {
 227                      $strquotient = ' ('. $quotient . ' %)';
 228                  }
 229                  $answertext = format_text(trim($val->answertext), FORMAT_HTML,
 230                          array('noclean' => true, 'para' => false));
 231  
 232                  $data['labels'][$count] = $answertext;
 233                  $data['series'][$count] = $val->answercount;
 234                  $data['series_labels'][$count] = $val->answercount . $strquotient;
 235                  $count++;
 236              }
 237              $chart = new \core\chart_bar();
 238              $chart->set_horizontal(true);
 239              $series = new \core\chart_series(format_string(get_string("responses", "feedback")), $data['series']);
 240              $series->set_labels($data['series_labels']);
 241              $chart->add_series($series);
 242              $chart->set_labels($data['labels']);
 243  
 244              echo '<tr><td>'. $OUTPUT->render($chart) . '</td></tr>';
 245              echo "</table>";
 246          }
 247      }
 248  
 249      public function excelprint_item(&$worksheet, $row_offset,
 250                               $xls_formats, $item,
 251                               $groupid, $courseid = false) {
 252  
 253          $analysed_item = $this->get_analysed($item, $groupid, $courseid);
 254          if (!$analysed_item) {
 255              return $row_offset;
 256          }
 257  
 258          $data = $analysed_item[2];
 259  
 260          //frage schreiben
 261          $worksheet->write_string($row_offset, 0, $item->label, $xls_formats->head2);
 262          $worksheet->write_string($row_offset, 1, $analysed_item[1], $xls_formats->head2);
 263          if (is_array($data)) {
 264              $sizeofdata = count($data);
 265              for ($i = 0; $i < $sizeofdata; $i++) {
 266                  $analysed_data = $data[$i];
 267  
 268                  $worksheet->write_string($row_offset,
 269                                           $i + 2,
 270                                           trim($analysed_data->answertext),
 271                                           $xls_formats->head2);
 272  
 273                  $worksheet->write_number($row_offset + 1,
 274                                           $i + 2,
 275                                           $analysed_data->answercount,
 276                                           $xls_formats->default);
 277  
 278                  $worksheet->write_number($row_offset + 2,
 279                                           $i + 2,
 280                                           $analysed_data->quotient,
 281                                           $xls_formats->procent);
 282              }
 283          }
 284          $row_offset += 3;
 285          return $row_offset;
 286      }
 287  
 288      /**
 289       * Options for the multichoice element
 290       * @param stdClass $item
 291       * @return array
 292       */
 293      protected function get_options($item) {
 294          $info = $this->get_info($item);
 295          $presentation = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
 296          $options = array();
 297          foreach ($presentation as $idx => $optiontext) {
 298              $options[$idx + 1] = format_text($optiontext, FORMAT_HTML, array('noclean' => true, 'para' => false));
 299          }
 300          if ($info->subtype === 'r' && !$this->hidenoselect($item)) {
 301              $options = array(0 => get_string('not_selected', 'feedback')) + $options;
 302          }
 303  
 304          return $options;
 305      }
 306  
 307      /**
 308       * Adds an input element to the complete form
 309       *
 310       * This element has many options - it can be displayed as group or radio elements,
 311       * group of checkboxes or a dropdown list.
 312       *
 313       * @param stdClass $item
 314       * @param mod_feedback_complete_form $form
 315       */
 316      public function complete_form_element($item, $form) {
 317          $info = $this->get_info($item);
 318          $name = $this->get_display_name($item);
 319          $class = 'multichoice-' . $info->subtype;
 320          $inputname = $item->typ . '_' . $item->id;
 321          $options = $this->get_options($item);
 322          $separator = !empty($info->horizontal) ? ' ' : '<br>';
 323          $tmpvalue = $form->get_item_value($item) ?? 0; // Used for element defaults, so must be a valid value (not null).
 324  
 325          // Subtypes:
 326          // r = radio
 327          // c = checkbox
 328          // d = dropdown.
 329          if ($info->subtype === 'd' || ($info->subtype === 'r' && $form->is_frozen())) {
 330              // Display as a dropdown in the complete form or a single value in the response view.
 331              $element = $form->add_form_element($item,
 332                      ['select', $inputname, $name, array(0 => '') + $options, array('class' => $class)],
 333                      false, false);
 334              $form->set_element_default($inputname, $tmpvalue);
 335              $form->set_element_type($inputname, PARAM_INT);
 336          } else if ($info->subtype === 'c' && $form->is_frozen()) {
 337              // Display list of checkbox values in the response view.
 338              $objs = [];
 339              foreach (explode(FEEDBACK_MULTICHOICE_LINE_SEP, $form->get_item_value($item)) as $v) {
 340                  $objs[] = ['static', $inputname."[$v]", '', isset($options[$v]) ? $options[$v] : ''];
 341              }
 342              $element = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
 343          } else {
 344              // Display group or radio or checkbox elements.
 345              $class .= ' multichoice-' . ($info->horizontal ? 'horizontal' : 'vertical');
 346              $objs = [];
 347              if ($info->subtype === 'c') {
 348                  // Checkboxes.
 349                  $objs[] = ['hidden', $inputname.'[0]', 0];
 350                  $form->set_element_type($inputname.'[0]', PARAM_INT);
 351                  foreach ($options as $idx => $label) {
 352                      $objs[] = ['advcheckbox', $inputname.'['.$idx.']', '', $label, null, array(0, $idx)];
 353                      $form->set_element_type($inputname.'['.$idx.']', PARAM_INT);
 354                  }
 355                  // Span to hold the element id. The id is used for drag and drop reordering.
 356                  $objs[] = ['static', '', '', html_writer::span('', '', ['id' => 'feedback_item_' . $item->id])];
 357                  $element = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
 358                  if ($tmpvalue) {
 359                      foreach (explode(FEEDBACK_MULTICHOICE_LINE_SEP, $tmpvalue) as $v) {
 360                          $form->set_element_default($inputname.'['.$v.']', $v);
 361                      }
 362                  }
 363              } else {
 364                  // Radio.
 365                  if (!array_key_exists(0, $options)) {
 366                      // Always add a hidden element to the group to guarantee we get a value in the submit data.
 367                      $objs[] = ['hidden', $inputname, 0];
 368                  }
 369                  foreach ($options as $idx => $label) {
 370                      $objs[] = ['radio', $inputname, '', $label, $idx];
 371                  }
 372                  // Span to hold the element id. The id is used for drag and drop reordering.
 373                  $objs[] = ['static', '', '', html_writer::span('', '', ['id' => 'feedback_item_' . $item->id])];
 374                  $element = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
 375                  $form->set_element_default($inputname, $tmpvalue);
 376                  $form->set_element_type($inputname, PARAM_INT);
 377              }
 378          }
 379  
 380          // Process 'required' rule.
 381          if ($item->required) {
 382              $elementname = $element->getName();
 383              $form->add_validation_rule(function($values) use ($elementname, $item) {
 384                  $inputname = $item->typ . '_' . $item->id;
 385                  return empty($values[$inputname]) || (is_array($values[$inputname]) && !array_filter($values[$inputname])) ?
 386                      array($elementname => get_string('required')) : true;
 387              });
 388          }
 389      }
 390  
 391      /**
 392       * Prepares value that user put in the form for storing in DB
 393       * @param array $value
 394       * @return string
 395       */
 396      public function create_value($value) {
 397          // Could be an array (multichoice checkbox) or single value (multichoice radio or dropdown).
 398          $value = is_array($value) ? $value : [$value];
 399  
 400          $value = array_unique(array_filter($value));
 401          return join(FEEDBACK_MULTICHOICE_LINE_SEP, $value);
 402      }
 403  
 404      /**
 405       * Compares the dbvalue with the dependvalue
 406       *
 407       * @param stdClass $item
 408       * @param string $dbvalue is the value input by user in the format as it is stored in the db
 409       * @param string $dependvalue is the value that it needs to be compared against
 410       */
 411      public function compare_value($item, $dbvalue, $dependvalue) {
 412  
 413          if (is_array($dbvalue)) {
 414              $dbvalues = $dbvalue;
 415          } else {
 416              $dbvalues = explode(FEEDBACK_MULTICHOICE_LINE_SEP, $dbvalue);
 417          }
 418  
 419          $info = $this->get_info($item);
 420          $presentation = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
 421          $index = 1;
 422          foreach ($presentation as $pres) {
 423              foreach ($dbvalues as $dbval) {
 424                  if ($dbval == $index AND trim($pres) == $dependvalue) {
 425                      return true;
 426                  }
 427              }
 428              $index++;
 429          }
 430          return false;
 431      }
 432  
 433      public function get_info($item) {
 434          $presentation = empty($item->presentation) ? '' : $item->presentation;
 435  
 436          $info = new stdClass();
 437          //check the subtype of the multichoice
 438          //it can be check(c), radio(r) or dropdown(d)
 439          $info->subtype = '';
 440          $info->presentation = '';
 441          $info->horizontal = false;
 442  
 443          $parts = explode(FEEDBACK_MULTICHOICE_TYPE_SEP, $item->presentation);
 444          $info->subtype = $parts[0];
 445          if (count($parts) > 1) {
 446              $info->presentation = $parts[1];
 447          }
 448          if (!isset($info->subtype)) {
 449              $info->subtype = 'r';
 450          }
 451  
 452          if ($info->subtype != 'd') {
 453              $parts = explode(FEEDBACK_MULTICHOICE_ADJUST_SEP, $info->presentation);
 454              $info->presentation = $parts[0];
 455              if (count($parts) > 1) {
 456                  $info->horizontal = $parts[1];
 457              }
 458              if (isset($info->horizontal) AND $info->horizontal == 1) {
 459                  $info->horizontal = true;
 460              } else {
 461                  $info->horizontal = false;
 462              }
 463          }
 464          return $info;
 465      }
 466  
 467      public function set_ignoreempty($item, $ignoreempty=true) {
 468          $item->options = str_replace(FEEDBACK_MULTICHOICE_IGNOREEMPTY, '', $item->options);
 469          if ($ignoreempty) {
 470              $item->options .= FEEDBACK_MULTICHOICE_IGNOREEMPTY;
 471          }
 472      }
 473  
 474      public function ignoreempty($item) {
 475          if (strstr($item->options, FEEDBACK_MULTICHOICE_IGNOREEMPTY)) {
 476              return true;
 477          }
 478          return false;
 479      }
 480  
 481      public function set_hidenoselect($item, $hidenoselect=true) {
 482          $item->options = str_replace(FEEDBACK_MULTICHOICE_HIDENOSELECT, '', $item->options);
 483          if ($hidenoselect) {
 484              $item->options .= FEEDBACK_MULTICHOICE_HIDENOSELECT;
 485          }
 486      }
 487  
 488      public function hidenoselect($item) {
 489          if (strstr($item->options, FEEDBACK_MULTICHOICE_HIDENOSELECT)) {
 490              return true;
 491          }
 492          return false;
 493      }
 494  
 495      /**
 496       * Return the analysis data ready for external functions.
 497       *
 498       * @param stdClass $item     the item (question) information
 499       * @param int      $groupid  the group id to filter data (optional)
 500       * @param int      $courseid the course id (optional)
 501       * @return array an array of data with non scalar types json encoded
 502       * @since  Moodle 3.3
 503       */
 504      public function get_analysed_for_external($item, $groupid = false, $courseid = false) {
 505  
 506          $externaldata = array();
 507          $data = $this->get_analysed($item, $groupid, $courseid);
 508  
 509          if ($data && !empty($data[2]) && is_array($data[2])) {
 510              foreach ($data[2] as $d) {
 511                  $externaldata[] = json_encode($d);
 512              }
 513          }
 514          return $externaldata;
 515      }
 516  }