libdir/xmlize.php");
//require_once("xmlize.php");
/*
define("SHORTANSWER", "1");
define("TRUEFALSE", "2");
define("MULTICHOICE", "3");
define("MATCH", "5");
define("DESCRIPTION", "7");
define("NUMERICAL", "8");
define("MULTIANSWER", "9");
define("CALCULATED", "10");
*/
class qformat_examview extends qformat_default {
var $qtypes = array('tf' => TRUEFALSE,
'mc' => MULTICHOICE,
'yn' => TRUEFALSE,
'co' => SHORTANSWER,
'ma' => MATCH,
'mtf' => 99,
'nr' => NUMERICAL,
'pr' => 99,
'es' => 99,
'ca' => 99,
'ot' => 99
);
var $matching_questions = array();
function provide_import() {
return true;
}
function print_matching_questions()
{
foreach($this->matching_questions as $key => $value) {
print("$key => $value->questiontext
");
print("Questions:");
foreach($value->subquestions as $qkey => $qvalue) {
print("- $qkey => $qvalue
");
}
print("
");
print("Choices:");
foreach($value->subchoices as $ckey => $cvalue) {
print("- $ckey => $cvalue
");
}
print("
");
print("Answers:");
foreach($value->subanswers as $akey => $avalue) {
print("- $akey => $avalue
");
}
print("
");
}
}
function parse_matching_groups($matching_groups)
{
if (empty($matching_groups)) {
return;
}
foreach($matching_groups as $match_group) {
$newgroup = NULL;
$groupname = trim($match_group['@']['name']);
$questiontext = $this->ArrayTagToString($match_group['#']['text']['0']['#']);
$newgroup->questiontext = trim($questiontext);
$newgroup->subchoices = array();
$newgroup->subquestions = array();
$newgroup->subanswers = array();
$choices = $match_group['#']['choices']['0']['#'];
foreach($choices as $key => $value) {
if (strpos(trim($key),'choice-') !== FALSE) {
$key = strtoupper(trim(str_replace('choice-', '', $key)));
$newgroup->subchoices[$key] = trim($value['0']['#']);
}
}
$this->matching_questions[$groupname] = $newgroup;
}
}
function parse_ma($qrec, $groupname)
{
$match_group = $this->matching_questions[$groupname];
$phrase = trim($qrec['text']['0']['#']);
$answer = trim($qrec['answer']['0']['#']);
$match_group->subquestions[] = $phrase;
$match_group->subanswers[] = $match_group->subchoices[$answer];
$this->matching_questions[$groupname] = $match_group;
return NULL;
}
function process_matches(&$questions)
{
if (empty($this->matching_questions)) {
return;
}
foreach($this->matching_questions as $match_group) {
$question = $this->defaultquestion();
$htmltext = $this->htmlPrepare($match_group->questiontext);
$htmltext = addslashes($htmltext);
$question->questiontext = $htmltext;
$question->name = $question->questiontext;
$question->qtype = MATCH;
// No images with this format
// print($question->questiontext.' '.$question->id."
");
$question->subquestions = array();
$question->subanswers = array();
foreach($match_group->subquestions as $key => $value) {
$htmltext = $this->htmlPrepare($value);
$htmltext = addslashes($htmltext);
$question->subquestions[] = $htmltext;
$htmltext = $this->htmlPrepare($match_group->subanswers[$key]);
$htmltext = addslashes($htmltext);
$question->subanswers[] = $htmltext;
}
$questions[] = $question;
}
}
// cleans unicode characters from string
// add to the array unicode_array as necessary
function cleanUnicode($text) {
//$unicode_array = array("ߣ" => "'");
//return strtr($text, $unicode_array);
return str_replace('’', "'", $text);
}
function readquestions($lines)
{
/// Parses an array of lines into an array of questions,
/// where each item is a question object as defined by
/// readquestion().
$questions = array();
$currentquestion = array();
$text = implode($lines, ' ');
$text = $this->cleanUnicode($text);
$xml = xmlize($text, 0);
$this->parse_matching_groups($xml['examview']['#']['matching-group']);
$questionNode = $xml['examview']['#']['question'];
foreach($questionNode as $currentquestion) {
if ($question = $this->readquestion($currentquestion)) {
$questions[] = $question;
}
}
// print('
');
// $this->print_matching_questions();
$this->process_matches($questions);
// print('
');
return $questions;
}
// end readquestions
function htmlPrepare($htmltext)
{
$text = trim($text);
$text = s($htmltext);
//$htmltext = nl2br($text);
return $text;
}
function ArrayTagToString($aTag)
{
if (!is_array($aTag)) {
return $aTag;
}
$out = '';
foreach($aTag as $key => $value) {
if (is_array($value)) {
$out = $out.$this->ArrayTagToString($value);
} else {
$out = $value;
}
}
return $out;
}
function readquestion($qrec)
{
$type = trim($qrec['@']['type']);
$question = $this->defaultquestion();
$question->qtype = $this->qtypes[$type];
$question->single = 1;
// Only one answer is allowed
$htmltext = $this->ArrayTagToString($qrec['#']['text'][0]['#']);
$htmltext = $this->htmlPrepare($htmltext);
$htmltext = addslashes($htmltext);
$question->questiontext = $htmltext;
$question->name = $question->questiontext;
switch ($question->qtype) {
case MULTICHOICE:
$question = $this->parse_mc($qrec['#'], $question);
break;
case MATCH:
$groupname = trim($qrec['@']['group']);
$question = $this->parse_ma($qrec['#'], $groupname);
break;
case TRUEFALSE:
$question = $this->parse_tf_yn($qrec['#'], $question);
break;
case SHORTANSWER:
$question = $this->parse_co($qrec['#'], $question);
break;
case NUMERICAL:
$question = $this->parse_nr($qrec['#'], $question);
break;
break;
default:
print("Question type ".$type." import not supported for ".$question->questiontext."
");
$question = NULL;
}
// end switch ($question->qtype)
return $question;
}
// end readquestion
function parse_tf_yn($qrec, $question)
{
$choices = array('T' => 1, 'Y' => 1, 'F' => 0, 'N' => 0 );
$answer = trim($qrec['answer'][0]['#']);
$question->answer = $choices[$answer];
if ($question->answer == 1) {
$question->feedbacktrue = 'Correct';
$question->feedbackfalse = 'Incorrect';
} else {
$question->feedbacktrue = 'Incorrect';
$question->feedbackfalse = 'Correct';
}
return $question;
}
function parse_mc($qrec, $question)
{
$answer = 'choice-'.strtolower(trim($qrec['answer'][0]['#']));
$choices = $qrec['choices'][0]['#'];
foreach($choices as $key => $value) {
if (strpos(trim($key),'choice-') !== FALSE) {
$question->answer[$key] = $this->htmlPrepare($value[0]['#']);
if (strcmp($key, $answer) == 0) {
$question->fraction[$key] = 1;
$question->feedback[$key] = 'Correct';
} else {
$question->fraction[$key] = 0;
$question->feedback[$key] = 'Incorrect';
}
}
}
return $question;
}
function parse_co($qrec, $question)
{
$question->usecase = 0;
$answer = trim($qrec['answer'][0]['#']);
$answers = explode("\n",$answer);
foreach($answers as $key => $value) {
$value = trim($value);
if (strlen($value) > 0) {
$question->answer[$key] = addslashes($value);
$question->fraction[$key] = 1;
$question->feedback[$key] = "Correct";
}
}
return $question;
}
function parse_nr($qrec, $question)
{
$answer = trim($qrec['answer'][0]['#']);
$answers = explode("\n",$answer);
foreach($answers as $key => $value) {
$value = trim($value);
if (is_numeric($value)) {
$errormargin = 0;
$question->answer[$key] = $value;
$question->fraction[$key] = 1;
$question->feedback[$key] = "Correct";
$question->min[$key] = $question->answer[$key] - $errormargin;
$question->max[$key] = $question->answer[$key] + $errormargin;
}
}
return $question;
}
}
// end class
?>