class qformat_learnwise in Quiz 6.5

@package questionbank @subpackage importexport

Hierarchy

• class \qformat_default
  • class \qformat_learnwise

File

includes/moodle/question/format/learnwise/format.php, line 13

class qformat_learnwise extends qformat_default {
  function provide_import() {
    return true;
  }
  function readquestions($lines) {
    $questions = array();
    $currentquestion = array();
    foreach ($lines as $line) {
      $line = trim($line);
      $currentquestion[] = $line;
      if ($question = $this
        ->readquestion($currentquestion)) {
        $questions[] = $question;
        $currentquestion = array();
      }
    }
    return $questions;
  }
  function readquestion($lines) {
    $text = implode(' ', $lines);
    $text = str_replace(array(
      '\\t',
      '\\n',
      '\\r',
      '\'',
    ), array(
      '',
      '',
      '',
      '\\\'',
    ), $text);
    $startpos = strpos($text, '<question type');
    $endpos = strpos($text, '</question>');
    if ($startpos === false || $endpos === false) {
      return false;
    }
    preg_match("/<question type=[\"\\']([^\"\\']+)[\"\\']>/i", $text, $matches);
    $type = strtolower($matches[1]);

    // multichoice or multianswerchoice
    $questiontext = $this
      ->unhtmlentities($this
      ->stringbetween($text, '<text>', '</text>'));
    $questionhint = $this
      ->unhtmlentities($this
      ->stringbetween($text, '<hint>', '</hint>'));
    $questionaward = $this
      ->stringbetween($text, '<award>', '</award>');
    $optionlist = $this
      ->stringbetween($text, '<answer>', '</answer>');
    $optionlist = explode('<option', $optionlist);
    $n = 0;
    $optionscorrect = array();
    $optionstext = array();
    if ($type == 'multichoice') {
      foreach ($optionlist as $option) {
        $correct = $this
          ->stringbetween($option, ' correct="', '">');
        $answer = $this
          ->stringbetween($option, '">', '</option>');
        $optionscorrect[$n] = $correct;
        $optionstext[$n] = $this
          ->unhtmlentities($answer);
        ++$n;
      }
    }
    else {
      if ($type == 'multianswerchoice') {
        $numcorrect = 0;
        $totalaward = 0;
        $optionsaward = array();
        foreach ($optionlist as $option) {
          preg_match("/correct=\"([^\"]*)\"/i", $option, $correctmatch);
          preg_match("/award=\"([^\"]*)\"/i", $option, $awardmatch);
          $correct = $correctmatch[1];
          $award = $awardmatch[1];
          if ($correct == 'yes') {
            $totalaward += $award;
            ++$numcorrect;
          }
          $answer = $this
            ->stringbetween($option, '">', '</option>');
          $optionscorrect[$n] = $correct;
          $optionstext[$n] = $this
            ->unhtmlentities($answer);
          $optionsaward[$n] = $award;
          ++$n;
        }
      }
      else {
        echo "<p>I don't understand this question type (type = <strong>{$type}</strong>).</p>\n";
      }
    }
    $question = $this
      ->defaultquestion();
    $question->qtype = MULTICHOICE;
    $question->name = substr($questiontext, 0, 30);
    if (strlen($questiontext) > 30) {
      $question->name .= '...';
    }
    $question->questiontext = $questiontext;
    $question->single = $type == 'multichoice' ? 1 : 0;
    $question->feedback[] = '';
    $question->fraction = array();
    $question->answer = array();
    for ($n = 0; $n < count($optionstext); ++$n) {
      if ($optionstext[$n]) {
        if (!isset($numcorrect)) {

          // single answer
          if ($optionscorrect[$n] == 'yes') {
            $fraction = (int) $questionaward;
          }
          else {
            $fraction = 0;
          }
        }
        else {

          // mulitple answers
          if ($optionscorrect[$n] == 'yes') {
            $fraction = $optionsaward[$n] / $totalaward;
          }
          else {
            $fraction = -$optionsaward[$n] / count($optionstext);
          }
        }
        $question->fraction[] = $fraction;
        $question->answer[] = $optionstext[$n];
        $question->feedback[] = '';

        // no feedback in this type
      }
    }
    return $question;
  }
  function stringbetween($text, $start, $end) {
    $startpos = strpos($text, $start) + strlen($start);
    $endpos = strpos($text, $end);
    if ($startpos <= $endpos) {
      return substr($text, $startpos, $endpos - $startpos);
    }
  }
  function unhtmlentities($string) {
    $transtable = get_html_translation_table(HTML_ENTITIES);
    $transtable = array_flip($transtable);
    return strtr($string, $transtable);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
qformat_default::$canaccessbackupdata		property
qformat_default::$category		property
qformat_default::$catfromfile		property
qformat_default::$cattofile		property
qformat_default::$contextfromfile		property
qformat_default::$contexttofile		property
qformat_default::$course		property
qformat_default::$displayerrors		property
qformat_default::$filename		property
qformat_default::$importerrors		property
qformat_default::$matchgrades		property
qformat_default::$questionids		property
qformat_default::$questions		property
qformat_default::$realfilename		property
qformat_default::$stoponerror		property
qformat_default::$translator		property
qformat_default::count_questions		function	Count all non-category questions in the questions array.
qformat_default::create_category_path		function	find and/or create the category described by a delimited list e.g. $course$/tom/dick/harry or tom/dick/harry
qformat_default::defaultquestion		function	return an "empty" question Somewhere to specify question parameters that are not handled by import but are required db fields. This should not be overridden.
qformat_default::error		function	Handle parsing error
qformat_default::exportpostprocess		function	Do an post-processing that may be required
qformat_default::exportpreprocess		function	Do any pre-processing that may be required	1
qformat_default::exportprocess		function	Do the export For most types this should not need to be overrided	1
qformat_default::export_file_extension		function	Return the files extension appropriate for this type override if you don't want .txt	3
qformat_default::format_question_text		function	where question specifies a moodle (text) format this performs the conversion.
qformat_default::get_category_path		function	get the category as a path (e.g., tom/dick/harry)
qformat_default::importimagefile		function	Import an image file encoded in base64 format
qformat_default::importpostprocess		function	Override if any post-processing is required	2
qformat_default::importpreprocess		function	Perform any required pre-processing	2
qformat_default::importprocess		function	Process the file This method should not normally be overidden	1
qformat_default::presave_process		function	Enable any processing to be done on the content just prior to the file being saved default is to do nothing	2
qformat_default::provide_export		function		4
qformat_default::question_get_export_dir		function	get directory into which export is going
qformat_default::readdata		function	Return complete file within an array, one item per line	1
qformat_default::setCategory		function	set the category
qformat_default::setCatfromfile		function	set catfromfile
qformat_default::setCattofile		function	set cattofile
qformat_default::setContextfromfile		function	set contextfromfile
qformat_default::setContexts		function	set an array of contexts.
qformat_default::setContexttofile		function	set contexttofile
qformat_default::setCourse		function	set the course class variable
qformat_default::setFilename		function	set the filename
qformat_default::setMatchgrades		function	set matchgrades
qformat_default::setQuestions		function	Set the specific questions to export. Should not include questions with parents (sub questions of cloze question type). Only used for question export.
qformat_default::setRealfilename		function	set the "real" filename (this is what the user typed, regardless of wha happened next)
qformat_default::setStoponerror		function	set stoponerror
qformat_default::set_can_access_backupdata		function
qformat_default::try_exporting_using_qtypes		function	Provide export functionality for plugin questiontypes Do not override
qformat_default::try_importing_using_qtypes		function	Import for questiontype plugins Do not override.
qformat_default::writequestion		function	convert a single question object into text output in the given format. This must be overriden	4
qformat_learnwise::provide_import		function	Overrides qformat_default::provide_import
qformat_learnwise::readquestion		function	Given the data known to define a question in this format, this function converts it into a question object suitable for processing and insertion into Moodle. Overrides qformat_default::readquestion
qformat_learnwise::readquestions		function	Parses an array of lines into an array of questions, where each item is a question object as defined by readquestion(). Questions are defined as anything between blank lines. Overrides qformat_default::readquestions
qformat_learnwise::stringbetween		function
qformat_learnwise::unhtmlentities		function