[Summary view]

Differences Between: [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   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_RADIORATED_ADJUST_SEP', '<<<<<');
  21  
  22  define('FEEDBACK_MULTICHOICERATED_MAXCOUNT', 10); //count of possible items
  23  define('FEEDBACK_MULTICHOICERATED_VALUE_SEP', '####');
  24  define('FEEDBACK_MULTICHOICERATED_VALUE_SEP2', '/');
  25  define('FEEDBACK_MULTICHOICERATED_TYPE_SEP', '>>>>>');
  26  define('FEEDBACK_MULTICHOICERATED_LINE_SEP', '|');
  27  define('FEEDBACK_MULTICHOICERATED_ADJUST_SEP', '<<<<<');
  28  define('FEEDBACK_MULTICHOICERATED_IGNOREEMPTY', 'i');
  29  define('FEEDBACK_MULTICHOICERATED_HIDENOSELECT', 'h');
  30  
  31  class feedback_item_multichoicerated extends feedback_item_base {
  32      protected $type = "multichoicerated";
  33  
  34      public function build_editform($item, $feedback, $cm) {
  35          global $DB, $CFG;
  36          require_once ('multichoicerated_form.php');
  37  
  38          //get the lastposition number of the feedback_items
  39          $position = $item->position;
  40          $lastposition = $DB->count_records('feedback_item', array('feedback'=>$feedback->id));
  41          if ($position == -1) {
  42              $i_formselect_last = $lastposition + 1;
  43              $i_formselect_value = $lastposition + 1;
  44              $item->position = $lastposition + 1;
  45          } else {
  46              $i_formselect_last = $lastposition;
  47              $i_formselect_value = $item->position;
  48          }
  49          //the elements for position dropdownlist
  50          $positionlist = array_slice(range(0, $i_formselect_last), 1, $i_formselect_last, true);
  51  
  52          $item->presentation = empty($item->presentation) ? '' : $item->presentation;
  53          $info = $this->get_info($item);
  54  
  55          $item->ignoreempty = $this->ignoreempty($item);
  56          $item->hidenoselect = $this->hidenoselect($item);
  57  
  58          //all items for dependitem
  59          $feedbackitems = feedback_get_depend_candidates_for_item($feedback, $item);
  60          $commonparams = array('cmid'=>$cm->id,
  61                               'id'=>isset($item->id) ? $item->id : null,
  62                               'typ'=>$item->typ,
  63                               'items'=>$feedbackitems,
  64                               'feedback'=>$feedback->id);
  65  
  66          //build the form
  67          $customdata = array('item' => $item,
  68                              'common' => $commonparams,
  69                              'positionlist' => $positionlist,
  70                              'position' => $position,
  71                              'info' => $info);
  72  
  73          $this->item_form = new feedback_multichoicerated_form('edit_item.php', $customdata);
  74      }
  75  
  76      public function save_item() {
  77          global $DB;
  78  
  79          if (!$this->get_data()) {
  80              return false;
  81          }
  82          $item = $this->item;
  83  
  84          if (isset($item->clone_item) AND $item->clone_item) {
  85              $item->id = ''; //to clone this item
  86              $item->position++;
  87          }
  88  
  89          $this->set_ignoreempty($item, $item->ignoreempty);
  90          $this->set_hidenoselect($item, $item->hidenoselect);
  91  
  92          $item->hasvalue = $this->get_hasvalue();
  93          if (!$item->id) {
  94              $item->id = $DB->insert_record('feedback_item', $item);
  95          } else {
  96              $DB->update_record('feedback_item', $item);
  97          }
  98  
  99          return $DB->get_record('feedback_item', array('id'=>$item->id));
 100      }
 101  
 102  
 103      /**
 104       * Helper function for collected data, both for analysis page and export to excel
 105       *
 106       * @param stdClass $item the db-object from feedback_item
 107       * @param int $groupid
 108       * @param int $courseid
 109       * @return array
 110       */
 111      protected function get_analysed($item, $groupid = false, $courseid = false) {
 112          $analysed_item = array();
 113          $analysed_item[] = $item->typ;
 114          $analysed_item[] = $item->name;
 115  
 116          //die moeglichen Antworten extrahieren
 117          $info = $this->get_info($item);
 118          $lines = null;
 119          $lines = explode (FEEDBACK_MULTICHOICERATED_LINE_SEP, $info->presentation);
 120          if (!is_array($lines)) {
 121              return null;
 122          }
 123  
 124          //die Werte holen
 125          $values = feedback_get_group_values($item, $groupid, $courseid, $this->ignoreempty($item));
 126          if (!$values) {
 127              return null;
 128          }
 129          //schleife ueber den Werten und ueber die Antwortmoeglichkeiten
 130  
 131          $analysed_answer = array();
 132          $sizeoflines = count($lines);
 133          for ($i = 1; $i <= $sizeoflines; $i++) {
 134              $item_values = explode(FEEDBACK_MULTICHOICERATED_VALUE_SEP, $lines[$i-1]);
 135              $ans = new stdClass();
 136              $ans->answertext = $item_values[1];
 137              $avg = 0.0;
 138              $anscount = 0;
 139              foreach ($values as $value) {
 140                  //ist die Antwort gleich dem index der Antworten + 1?
 141                  if ($value->value == $i) {
 142                      $avg += $item_values[0]; //erst alle Werte aufsummieren
 143                      $anscount++;
 144                  }
 145              }
 146              $ans->answercount = $anscount;
 147              $ans->avg = doubleval($avg) / doubleval(count($values));
 148              $ans->value = $item_values[0];
 149              $ans->quotient = $ans->answercount / count($values);
 150              $analysed_answer[] = $ans;
 151          }
 152          $analysed_item[] = $analysed_answer;
 153          return $analysed_item;
 154      }
 155  
 156      public function get_printval($item, $value) {
 157          $printval = '';
 158  
 159          if (!isset($value->value)) {
 160              return $printval;
 161          }
 162  
 163          $info = $this->get_info($item);
 164  
 165          $presentation = explode (FEEDBACK_MULTICHOICERATED_LINE_SEP, $info->presentation);
 166          $index = 1;
 167          foreach ($presentation as $pres) {
 168              if ($value->value == $index) {
 169                  $item_label = explode(FEEDBACK_MULTICHOICERATED_VALUE_SEP, $pres);
 170                  $printval = format_string($item_label[1]);
 171                  break;
 172              }
 173              $index++;
 174          }
 175          return $printval;
 176      }
 177  
 178      public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
 179          global $OUTPUT;
 180          $analysed_item = $this->get_analysed($item, $groupid, $courseid);
 181          if ($analysed_item) {
 182              echo "<table class=\"analysis itemtype_{$item->typ}\">";
 183              echo '<tr><th colspan="2" align="left">';
 184              echo $itemnr . ' ';
 185              if (strval($item->label) !== '') {
 186                  echo '('. format_string($item->label).') ';
 187              }
 188              echo format_string($analysed_item[1]);
 189              echo '</th></tr>';
 190              echo '</table>';
 191              $analysed_vals = $analysed_item[2];
 192              $avg = 0.0;
 193              $count = 0;
 194              $data = [];
 195              foreach ($analysed_vals as $val) {
 196                  $avg += $val->avg;
 197                  $quotient = format_float($val->quotient * 100, 2);
 198                  $answertext = '('.$val->value.') ' . format_text(trim($val->answertext), FORMAT_HTML,
 199                          array('noclean' => true, 'para' => false));
 200  
 201                  if ($val->quotient > 0) {
 202                      $strquotient = ' ('.$quotient.' %)';
 203                  } else {
 204                      $strquotient = '';
 205                  }
 206  
 207                  $data['labels'][$count] = $answertext;
 208                  $data['series'][$count] = $val->answercount;
 209                  $data['series_labels'][$count] = $val->answercount . $strquotient;
 210                  $count++;
 211              }
 212              $chart = new \core\chart_bar();
 213              $chart->set_horizontal(true);
 214              $series = new \core\chart_series(format_string(get_string("responses", "feedback")), $data['series']);
 215              $series->set_labels($data['series_labels']);
 216              $chart->add_series($series);
 217              $chart->set_labels($data['labels']);
 218              echo $OUTPUT->render($chart);
 219  
 220              $avg = format_float($avg, 2);
 221              echo '<tr><td align="left" colspan="2"><b>';
 222              echo get_string('average', 'feedback').': '.$avg.'</b>';
 223              echo '</td></tr>';
 224          }
 225      }
 226  
 227      public function excelprint_item(&$worksheet, $row_offset,
 228                               $xls_formats, $item,
 229                               $groupid, $courseid = false) {
 230  
 231          $analysed_item = $this->get_analysed($item, $groupid, $courseid);
 232  
 233          $data = $analysed_item[2];
 234  
 235          //write the item
 236          $worksheet->write_string($row_offset, 0, $item->label, $xls_formats->head2);
 237          $worksheet->write_string($row_offset, 1, $analysed_item[1], $xls_formats->head2);
 238          if (is_array($data)) {
 239              $avg = 0.0;
 240              $sizeofdata = count($data);
 241              for ($i = 0; $i < $sizeofdata; $i++) {
 242                  $analysed_data = $data[$i];
 243  
 244                  $worksheet->write_string($row_offset,
 245                                  $i + 2,
 246                                  trim($analysed_data->answertext).' ('.$analysed_data->value.')',
 247                                  $xls_formats->value_bold);
 248  
 249                  $worksheet->write_number($row_offset + 1,
 250                                  $i + 2,
 251                                  $analysed_data->answercount,
 252                                  $xls_formats->default);
 253  
 254                  $avg += $analysed_data->avg;
 255              }
 256              //mittelwert anzeigen
 257              $worksheet->write_string($row_offset,
 258                                  count($data) + 2,
 259                                  get_string('average', 'feedback'),
 260                                  $xls_formats->value_bold);
 261  
 262              $worksheet->write_number($row_offset + 1,
 263                                  count($data) + 2,
 264                                  $avg,
 265                                  $xls_formats->value_bold);
 266          }
 267          $row_offset +=2;
 268          return $row_offset;
 269      }
 270  
 271      /**
 272       * Options for the multichoice element
 273       * @param stdClass $item
 274       * @return array
 275       */
 276      protected function get_options($item) {
 277          $info = $this->get_info($item);
 278          $lines = explode(FEEDBACK_MULTICHOICERATED_LINE_SEP, $info->presentation);
 279          $options = array();
 280          foreach ($lines as $idx => $line) {
 281              list($weight, $optiontext) = explode(FEEDBACK_MULTICHOICERATED_VALUE_SEP, $line);
 282              $a = new stdclass();
 283              $a->weight = $weight;
 284              $a->name = format_text($optiontext, FORMAT_HTML, array('noclean' => true, 'para' => false));
 285              $options[$idx + 1] = get_string('multichoiceoption', 'feedback', $a);
 286          }
 287          if ($info->subtype === 'r' && !$this->hidenoselect($item)) {
 288              $options = array(0 => get_string('not_selected', 'feedback')) + $options;
 289          }
 290  
 291          return $options;
 292      }
 293  
 294      /**
 295       * Adds an input element to the complete form
 296       *
 297       * @param stdClass $item
 298       * @param mod_feedback_complete_form $form
 299       */
 300      public function complete_form_element($item, $form) {
 301          $info = $this->get_info($item);
 302          $name = $this->get_display_name($item);
 303          $class = 'multichoicerated-' . $info->subtype;
 304          $inputname = $item->typ . '_' . $item->id;
 305          $options = $this->get_options($item);
 306          if ($info->subtype === 'd' || $form->is_frozen()) {
 307              $el = $form->add_form_element($item,
 308                      ['select', $inputname, $name, array('' => '') + $options, array('class' => $class)]);
 309          } else {
 310              $objs = array();
 311              if (!array_key_exists(0, $options)) {
 312                  // Always add '0' as hidden element, otherwise form submit data may not have this element.
 313                  $objs[] = ['hidden', $inputname];
 314              }
 315              foreach ($options as $idx => $label) {
 316                  $objs[] = ['radio', $inputname, '', $label, $idx];
 317              }
 318              // Span to hold the element id. The id is used for drag and drop reordering.
 319              $objs[] = ['static', '', '', html_writer::span('', '', ['id' => 'feedback_item_' . $item->id])];
 320              $separator = $info->horizontal ? ' ' : '<br>';
 321              $class .= ' multichoicerated-' . ($info->horizontal ? 'horizontal' : 'vertical');
 322              $el = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
 323              $form->set_element_type($inputname, PARAM_INT);
 324  
 325              // Set previously input values.
 326              $form->set_element_default($inputname, $form->get_item_value($item));
 327  
 328              // Process "required" rule.
 329              if ($item->required) {
 330                  $form->add_validation_rule(function($values, $files) use ($item) {
 331                      $inputname = $item->typ . '_' . $item->id;
 332                      return empty($values[$inputname]) ? array('group_' . $inputname => get_string('required')) : true;
 333                  });
 334              }
 335          }
 336      }
 337  
 338      /**
 339       * Compares the dbvalue with the dependvalue
 340       *
 341       * @param stdClass $item
 342       * @param string $dbvalue is the value input by user in the format as it is stored in the db
 343       * @param string $dependvalue is the value that it needs to be compared against
 344       */
 345      public function compare_value($item, $dbvalue, $dependvalue) {
 346  
 347          if (is_array($dbvalue)) {
 348              $dbvalues = $dbvalue;
 349          } else {
 350              $dbvalues = explode(FEEDBACK_MULTICHOICERATED_LINE_SEP, $dbvalue);
 351          }
 352  
 353          $info = $this->get_info($item);
 354          $presentation = explode (FEEDBACK_MULTICHOICERATED_LINE_SEP, $info->presentation);
 355          $index = 1;
 356          foreach ($presentation as $pres) {
 357              $presvalues = explode(FEEDBACK_MULTICHOICERATED_VALUE_SEP, $pres);
 358  
 359              foreach ($dbvalues as $dbval) {
 360                  if ($dbval == $index AND trim($presvalues[1]) == $dependvalue) {
 361                      return true;
 362                  }
 363              }
 364              $index++;
 365          }
 366          return false;
 367      }
 368  
 369      public function get_info($item) {
 370          $presentation = empty($item->presentation) ? '' : $item->presentation;
 371  
 372          $info = new stdClass();
 373          //check the subtype of the multichoice
 374          //it can be check(c), radio(r) or dropdown(d)
 375          $info->subtype = '';
 376          $info->presentation = '';
 377          $info->horizontal = false;
 378  
 379          $parts = explode(FEEDBACK_MULTICHOICERATED_TYPE_SEP, $item->presentation);
 380          @list($info->subtype, $info->presentation) = $parts;
 381  
 382          if (!isset($info->subtype)) {
 383              $info->subtype = 'r';
 384          }
 385  
 386          if ($info->subtype != 'd') {
 387              $parts = explode(FEEDBACK_MULTICHOICERATED_ADJUST_SEP, $info->presentation);
 388              @list($info->presentation, $info->horizontal) = $parts;
 389  
 390              if (isset($info->horizontal) AND $info->horizontal == 1) {
 391                  $info->horizontal = true;
 392              } else {
 393                  $info->horizontal = false;
 394              }
 395          }
 396  
 397          $info->values = $this->prepare_presentation_values_print($info->presentation,
 398                                                      FEEDBACK_MULTICHOICERATED_VALUE_SEP,
 399                                                      FEEDBACK_MULTICHOICERATED_VALUE_SEP2);
 400          return $info;
 401      }
 402  
 403      public function prepare_presentation_values($linesep1,
 404                                           $linesep2,
 405                                           $valuestring,
 406                                           $valuesep1,
 407                                           $valuesep2) {
 408  
 409          $lines = explode($linesep1, $valuestring);
 410          $newlines = array();
 411          foreach ($lines as $line) {
 412              $value = '';
 413              $text = '';
 414              if (strpos($line, $valuesep1) === false) {
 415                  $value = 0;
 416                  $text = $line;
 417              } else {
 418                  @list($value, $text) = explode($valuesep1, $line, 2);
 419              }
 420  
 421              $value = intval($value);
 422              $newlines[] = $value.$valuesep2.$text;
 423          }
 424          $newlines = implode($linesep2, $newlines);
 425          return $newlines;
 426      }
 427  
 428      public function prepare_presentation_values_print($valuestring, $valuesep1, $valuesep2) {
 429          $valuestring = str_replace(array("\n","\r"), "", $valuestring);
 430          return $this->prepare_presentation_values(FEEDBACK_MULTICHOICERATED_LINE_SEP,
 431                                                    "\n",
 432                                                    $valuestring,
 433                                                    $valuesep1,
 434                                                    $valuesep2);
 435      }
 436  
 437      public function prepare_presentation_values_save($valuestring, $valuesep1, $valuesep2) {
 438          $valuestring = str_replace("\r", "\n", $valuestring);
 439          $valuestring = str_replace("\n\n", "\n", $valuestring);
 440          return $this->prepare_presentation_values("\n",
 441                          FEEDBACK_MULTICHOICERATED_LINE_SEP,
 442                          $valuestring,
 443                          $valuesep1,
 444                          $valuesep2);
 445      }
 446  
 447      public function set_ignoreempty($item, $ignoreempty=true) {
 448          $item->options = str_replace(FEEDBACK_MULTICHOICERATED_IGNOREEMPTY, '', $item->options);
 449          if ($ignoreempty) {
 450              $item->options .= FEEDBACK_MULTICHOICERATED_IGNOREEMPTY;
 451          }
 452      }
 453  
 454      public function ignoreempty($item) {
 455          if (strstr($item->options, FEEDBACK_MULTICHOICERATED_IGNOREEMPTY)) {
 456              return true;
 457          }
 458          return false;
 459      }
 460  
 461      public function set_hidenoselect($item, $hidenoselect=true) {
 462          $item->options = str_replace(FEEDBACK_MULTICHOICERATED_HIDENOSELECT, '', $item->options);
 463          if ($hidenoselect) {
 464              $item->options .= FEEDBACK_MULTICHOICERATED_HIDENOSELECT;
 465          }
 466      }
 467  
 468      public function hidenoselect($item) {
 469          if (strstr($item->options, FEEDBACK_MULTICHOICERATED_HIDENOSELECT)) {
 470              return true;
 471          }
 472          return false;
 473      }
 474  
 475      /**
 476       * Return the analysis data ready for external functions.
 477       *
 478       * @param stdClass $item     the item (question) information
 479       * @param int      $groupid  the group id to filter data (optional)
 480       * @param int      $courseid the course id (optional)
 481       * @return array an array of data with non scalar types json encoded
 482       * @since  Moodle 3.3
 483       */
 484      public function get_analysed_for_external($item, $groupid = false, $courseid = false) {
 485  
 486          $externaldata = array();
 487          $data = $this->get_analysed($item, $groupid, $courseid);
 488  
 489          if (!empty($data[2]) && is_array($data[2])) {
 490              foreach ($data[2] as $d) {
 491                  $externaldata[] = json_encode($d);
 492              }
 493          }
 494          return $externaldata;
 495      }
 496  }