]*?>.*?'si", // remove javascript
"'<[\/\!]*?[^>]*?>'si", // remove HTML tags
"'([\r\n])[\s]+'", // remove spaces
"'&(quot|#34);'i", // remove HTML entites
"'&(amp|#38);'i",
"'&(lt|#60);'i",
"'&(gt|#62);'i",
"'&(nbsp|#160);'i",
"'&(iexcl|#161);'i",
"'&(cent|#162);'i",
"'&(pound|#163);'i",
"'&(copy|#169);'i",
"'(\d+);'e"); // Evaluate like PHP
$replace = array ("",
"",
"\\1",
"\"",
"&",
"<",
"?>",
" ",
chr(161),
chr(162),
chr(163),
chr(169),
"chr(\\1)");
return preg_replace ($search, $replace, $string);
}
function qformat_webct_convert_formula($formula) {
// Remove empty space, as it would cause problems otherwise:
$formula = str_replace(' ', '', $formula);
// Remove paranthesis after e,E and *10**:
while (ereg('[0-9.](e|E|\\*10\\*\\*)\\([+-]?[0-9]+\\)', $formula, $regs)) {
$formula = str_replace(
$regs[0], ereg_replace('[)(]', '', $regs[0]), $formula);
}
// Replace *10** with e where possible
while (ereg(
'(^[+-]?|[^eE][+-]|[^0-9eE+-])[0-9.]+\\*10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)',
$formula, $regs)) {
$formula = str_replace(
$regs[0], str_replace('*10**', 'e', $regs[0]), $formula);
}
// Replace other 10** with 1e where possible
while (ereg('(^|[^0-9.eE])10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)', $formula, $regs)) {
$formula = str_replace(
$regs[0], str_replace('10**', '1e', $regs[0]), $formula);
}
// Replace all other base**exp with the PHP equivalent function pow(base,exp)
// (Pretty tricky to exchange an operator with a function)
while (2 == count($splits = explode('**', $formula, 2))) {
// Find $base
if (ereg('^(.*[^0-9.eE])?(([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?|\\{[^}]*\\})$',
$splits[0], $regs)) {
// The simple cases
$base = $regs[2];
$splits[0] = $regs[1];
} else if (ereg('\\)$', $splits[0])) {
// Find the start of this parenthesis
$deep = 1;
for ($i = 1 ; $deep ; ++$i) {
if (!ereg('^(.*[^[:alnum:]_])?([[:alnum:]_]*([)(])([^)(]*[)(]){'.$i.'})$',
$splits[0], $regs)) {
error("Parenthesis before ** is not properly started in $splits[0]**");
}
if ('(' == $regs[3]) {
--$deep;
} else if (')' == $regs[3]) {
++$deep;
} else {
error("Impossible character $regs[3] detected as parenthesis character");
}
}
$base = $regs[2];
$splits[0] = $regs[1];
} else {
error("Bad base before **: $splits[0]**");
}
// Find $exp (similar to above but a little easier)
if (ereg('^([+-]?(\\{[^}]\\}|([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?))(.*)',
$splits[1], $regs)) {
// The simple case
$exp = $regs[1];
$splits[1] = $regs[6];
} else if (ereg('^[+-]?[[:alnum:]_]*\\(', $splits[1])) {
// Find the end of the parenthesis
$deep = 1;
for ($i = 1 ; $deep ; ++$i) {
if (!ereg('^([+-]?[[:alnum:]_]*([)(][^)(]*){'.$i.'}([)(]))(.*)',
$splits[1], $regs)) {
error("Parenthesis after ** is not properly closed in **$splits[1]");
}
if (')' == $regs[3]) {
--$deep;
} else if ('(' == $regs[3]) {
++$deep;
} else {
error("Impossible character $regs[3] detected as parenthesis character");
}
}
$exp = $regs[1];
$splits[1] = $regs[4];
}
// Replace it!
$formula = "$splits[0]pow($base,$exp)$splits[1]";
}
// Nothing more is known to need to be converted
return $formula;
}
class qformat_webct extends qformat_default {
function provide_import() {
return true;
}
function readquestions ($lines) {
global $QTYPES ;
// $qtypecalculated = new qformat_webct_modified_calculated_qtype();
$webctnumberregex =
'[+-]?([0-9]+(\\.[0-9]*)?|\\.[0-9]+)((e|E|\\*10\\*\\*)([+-]?[0-9]+|\\([+-]?[0-9]+\\)))?';
$questions = array();
$errors = array();
$warnings = array();
$webct_options = array();
$ignore_rest_of_question = FALSE;
$nLineCounter = 0;
$nQuestionStartLine = 0;
$bIsHTMLText = FALSE;
$lines[] = ":EOF:"; // for an easiest processing of the last line
// $question = $this->defaultquestion();
foreach ($lines as $line) {
$nLineCounter++;
$line = iconv("Windows-1252","UTF-8",$line);
// Processing multiples lines strings
if (isset($questiontext) and is_string($questiontext)) {
if (ereg("^:",$line)) {
$question->questiontext = addslashes(trim($questiontext));
unset($questiontext);
}
else {
$questiontext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($answertext) and is_string($answertext)) {
if (ereg("^:",$line)) {
$answertext = addslashes(trim($answertext));
$question->answer[$currentchoice] = $answertext;
$question->subanswers[$currentchoice] = $answertext;
unset($answertext);
}
else {
$answertext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($responsetext) and is_string($responsetext)) {
if (ereg("^:",$line)) {
$question->subquestions[$currentchoice] = addslashes(trim($responsetext));
unset($responsetext);
}
else {
$responsetext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($feedbacktext) and is_string($feedbacktext)) {
if (ereg("^:",$line)) {
$question->feedback[$currentchoice] = addslashes(trim($feedbacktext));
unset($feedbacktext);
}
else {
$feedbacktext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($generalfeedbacktext) and is_string($generalfeedbacktext)) {
if (ereg("^:",$line)) {
$question->tempgeneralfeedback= addslashes(trim($generalfeedbacktext));
unset($generalfeedbacktext);
}
else {
$generalfeedbacktext .= str_replace('\:', ':', $line);
continue;
}
}
$line = trim($line);
if (eregi("^:(TYPE|EOF):",$line)) {
// New Question or End of File
if (isset($question)) { // if previous question exists, complete, check and save it
// Setup default value of missing fields
if (!isset($question->name)) {
$question->name = $question->questiontext;
}
if (strlen($question->name) > 255) {
$question->name = substr($question->name,0,250)."...";
$warnings[] = get_string("questionnametoolong", "quiz", $nQuestionStartLine);
}
if (!isset($question->defaultgrade)) {
$question->defaultgrade = 1;
}
if (!isset($question->image)) {
$question->image = "";
}
// Perform sanity checks
$QuestionOK = TRUE;
if (strlen($question->questiontext) == 0) {
$warnings[] = get_string("missingquestion", "quiz", $nQuestionStartLine);
$QuestionOK = FALSE;
}
if (sizeof($question->answer) < 1) { // a question must have at least 1 answer
$errors[] = get_string("missinganswer", "quiz", $nQuestionStartLine);
$QuestionOK = FALSE;
}
else {
// Create empty feedback array
foreach ($question->answer as $key => $dataanswer) {
if(!isset( $question->feedback[$key])){
$question->feedback[$key] = '';
}
}
// this tempgeneralfeedback allows the code to work with versions from 1.6 to 1.9
// when question->generalfeedback is undefined, the webct feedback is added to each answer feedback
if (isset($question->tempgeneralfeedback)){
if (isset($question->generalfeedback)) {
$question->generalfeedback = $question->tempgeneralfeedback;
} else {
foreach ($question->answer as $key => $dataanswer) {
if ($question->tempgeneralfeedback !=''){
$question->feedback[$key] = $question->tempgeneralfeedback.'
'.$question->feedback[$key];
}
}
}
unset($question->tempgeneralfeedback);
}
$maxfraction = -1;
$totalfraction = 0;
foreach($question->fraction as $fraction) {
if ($fraction > 0) {
$totalfraction += $fraction;
}
if ($fraction > $maxfraction) {
$maxfraction = $fraction;
}
}
switch ($question->qtype) {
case SHORTANSWER:
if ($maxfraction != 1) {
$maxfraction = $maxfraction * 100;
$errors[] = "'$question->name': ".get_string("wronggrade", "quiz", $nLineCounter).' '.get_string("fractionsnomax", "quiz", $maxfraction);
$QuestionOK = FALSE;
}
break;
case MULTICHOICE:
if ($question->single) {
if ($maxfraction != 1) {
$maxfraction = $maxfraction * 100;
$errors[] = "'$question->name': ".get_string("wronggrade", "quiz", $nLineCounter).' '.get_string("fractionsnomax", "quiz", $maxfraction);
$QuestionOK = FALSE;
}
} else {
$totalfraction = round($totalfraction,2);
if ($totalfraction != 1) {
$totalfraction = $totalfraction * 100;
$errors[] = "'$question->name': ".get_string("wronggrade", "quiz", $nLineCounter).' '.get_string("fractionsaddwrong", "quiz", $totalfraction);
$QuestionOK = FALSE;
}
}
break;
case CALCULATED:
foreach ($question->answers as $answer) {
if ($formulaerror =qtype_calculated_find_formula_errors($answer)) { //$QTYPES['calculated']->
$warnings[] = "'$question->name': ". $formulaerror;
$QuestionOK = FALSE;
}
}
foreach ($question->dataset as $dataset) {
$dataset->itemcount=count($dataset->datasetitem);
}
$question->import_process=TRUE ;
unset($question->answer); //not used in calculated question
break;
case MATCH:
// MDL-10680:
// switch subquestions and subanswers
foreach ($question->subquestions as $id=>$subquestion) {
$temp = $question->subquestions[$id];
$question->subquestions[$id] = $question->subanswers[$id];
$question->subanswers[$id] = $temp;
}
if (count($question->answer) < 3){
// add a dummy missing question
$question->name = 'Dummy question added '.$question->name ;
$question->answer[] = 'dummy';
$question->subanswers[] = 'dummy';
$question->subquestions[] = 'dummy';
$question->fraction[] = '0.0';
$question->feedback[] = '';
}
break;
default:
// No problemo
}
}
if ($QuestionOK) {
// echo "
"; print_r ($question); $questions[] = $question; // store it unset($question); // and prepare a new one $question = $this->defaultquestion(); } } $nQuestionStartLine = $nLineCounter; } // Processing Question Header if (eregi("^:TYPE:MC:1(.*)",$line,$webct_options)) { // Multiple Choice Question with only one good answer $question = $this->defaultquestion(); $question->feedback = array(); $question->qtype = MULTICHOICE; $question->single = 1; // Only one answer is allowed $ignore_rest_of_question = FALSE; continue; } if (eregi("^:TYPE:MC:N(.*)",$line,$webct_options)) { // Multiple Choice Question with several good answers $question = $this->defaultquestion(); $question->feedback = array(); $question->qtype = MULTICHOICE; $question->single = 0; // Many answers allowed $ignore_rest_of_question = FALSE; continue; } if (eregi("^:TYPE:S",$line)) { // Short Answer Question $question = $this->defaultquestion(); $question->feedback = array(); $question->qtype = SHORTANSWER; $question->usecase = 0; // Ignore case $ignore_rest_of_question = FALSE; continue; } if (eregi("^:TYPE:C",$line)) { // Calculated Question /* $warnings[] = get_string("calculatedquestion", "quiz", $nLineCounter); unset($question); $ignore_rest_of_question = TRUE; // Question Type not handled by Moodle */ $question = $this->defaultquestion(); $question->qtype = CALCULATED; $question->answers = array(); // No problem as they go as :FORMULA: from webct $question->units = array(); $question->dataset = array(); // To make us pass the end-of-question sanity checks $question->answer = array('dummy'); $question->fraction = array('1.0'); $question->feedback = array(); $currentchoice = -1; $ignore_rest_of_question = FALSE; continue; } if (eregi("^:TYPE:M",$line)) { // Match Question $question = $this->defaultquestion(); $question->qtype = MATCH; $question->feedback = array(); $ignore_rest_of_question = FALSE; // match question processing is not debugged continue; } if (eregi("^:TYPE:P",$line)) { // Paragraph Question $warnings[] = get_string("paragraphquestion", "quiz", $nLineCounter); unset($question); $ignore_rest_of_question = TRUE; // Question Type not handled by Moodle continue; } if (eregi("^:TYPE:",$line)) { // Unknow Question $warnings[] = get_string("unknowntype", "quiz", $nLineCounter); unset($question); $ignore_rest_of_question = TRUE; // Question Type not handled by Moodle continue; } if ($ignore_rest_of_question) { continue; } if (eregi("^:TITLE:(.*)",$line,$webct_options)) { $name = trim($webct_options[1]); if (strlen($name) > 255) { $name = substr($name,0,250)."..."; $warnings[] = get_string("questionnametoolong", "quiz", $nLineCounter); } $question->name = addslashes($name); continue; } if (eregi("^:IMAGE:(.*)",$line,$webct_options)) { $filename = trim($webct_options[1]); if (eregi("^http://",$filename)) { $question->image = $filename; } continue; } // Need to put the parsing of calculated items here to avoid ambitiuosness: // if question isn't defined yet there is nothing to do here (avoid notices) if (!isset($question)) { continue; } if (isset($question->qtype ) && CALCULATED == $question->qtype && ereg( "^:([[:lower:]].*|::.*)-(MIN|MAX|DEC|VAL([0-9]+))::?:?($webctnumberregex)", $line, $webct_options)) { $datasetname = ereg_replace('^::', '', $webct_options[1]); $datasetvalue = qformat_webct_convert_formula($webct_options[4]); switch ($webct_options[2]) { case 'MIN': $question->dataset[$datasetname]->min = $datasetvalue; break; case 'MAX': $question->dataset[$datasetname]->max = $datasetvalue; break; case 'DEC': $datasetvalue = floor($datasetvalue); // int only! $question->dataset[$datasetname]->length = max(0, $datasetvalue); break; default: // The VAL case: $question->dataset[$datasetname]->datasetitem[$webct_options[3]] = new stdClass(); $question->dataset[$datasetname]->datasetitem[$webct_options[3]]->itemnumber = $webct_options[3]; $question->dataset[$datasetname]->datasetitem[$webct_options[3]]->value = $datasetvalue; break; } continue; } $bIsHTMLText = eregi(":H$",$line); // True if next lines are coded in HTML if (eregi("^:QUESTION",$line)) { $questiontext=""; // Start gathering next lines continue; } if (eregi("^:ANSWER([0-9]+):([^:]+):([0-9\.\-]+):(.*)",$line,$webct_options)) { /// SHORTANSWER $currentchoice=$webct_options[1]; $answertext=$webct_options[2]; // Start gathering next lines $question->fraction[$currentchoice]=($webct_options[3]/100); continue; } if (eregi("^:ANSWER([0-9]+):([0-9\.\-]+)",$line,$webct_options)) { $answertext=""; // Start gathering next lines $currentchoice=$webct_options[1]; $question->fraction[$currentchoice]=($webct_options[2]/100); continue; } if (eregi('^:FORMULA:(.*)', $line, $webct_options)) { // Answer for a CALCULATED question ++$currentchoice; $question->answers[$currentchoice] = qformat_webct_convert_formula($webct_options[1]); // Default settings: $question->fraction[$currentchoice] = 1.0; $question->tolerance[$currentchoice] = 0.0; $question->tolerancetype[$currentchoice] = 2; // nominal (units in webct) $question->feedback[$currentchoice] = ''; $question->correctanswerlength[$currentchoice] = 4; $datasetnames = $QTYPES[CALCULATED]->find_dataset_names($webct_options[1]); foreach ($datasetnames as $datasetname) { $question->dataset[$datasetname] = new stdClass(); $question->dataset[$datasetname]->datasetitem = array(); $question->dataset[$datasetname]->name = $datasetname ; $question->dataset[$datasetname]->distribution = 'uniform'; $question->dataset[$datasetname]->status ='private'; } continue; } if (eregi("^:L([0-9]+)",$line,$webct_options)) { $answertext=""; // Start gathering next lines $currentchoice=$webct_options[1]; $question->fraction[$currentchoice]=1; continue; } if (eregi("^:R([0-9]+)",$line,$webct_options)) { $responsetext=""; // Start gathering next lines $currentchoice=$webct_options[1]; continue; } if (eregi("^:REASON([0-9]+):?",$line,$webct_options)) { $feedbacktext=""; // Start gathering next lines $currentchoice=$webct_options[1]; continue; } if (eregi("^:FEEDBACK([0-9]+):?",$line,$webct_options)) { $generalfeedbacktext=""; // Start gathering next lines $currentchoice=$webct_options[1]; continue; } if (eregi('^:FEEDBACK:(.*)',$line,$webct_options)) { $generalfeedbacktext=""; // Start gathering next lines continue; } if (eregi('^:LAYOUT:(.*)',$line,$webct_options)) { // ignore since layout in question_multichoice is no more used in moodle // $webct_options[1] contains either vertical or horizontal ; continue; } if (isset($question->qtype ) && CALCULATED == $question->qtype && eregi('^:ANS-DEC:([1-9][0-9]*)', $line, $webct_options)) { // We can but hope that this always appear before the ANSTYPE property $question->correctanswerlength[$currentchoice] = $webct_options[1]; continue; } if (isset($question->qtype )&& CALCULATED == $question->qtype && eregi("^:TOL:($webctnumberregex)", $line, $webct_options)) { // We can but hope that this always appear before the TOL property $question->tolerance[$currentchoice] = qformat_webct_convert_formula($webct_options[1]); continue; } if (isset($question->qtype )&& CALCULATED == $question->qtype && eregi('^:TOLTYPE:percent', $line)) { // Percentage case is handled as relative in Moodle: $question->tolerance[$currentchoice] /= 100; $question->tolerancetype[$currentchoice] = 1; // Relative continue; } if (eregi('^:UNITS:(.+)', $line, $webct_options) and $webctunits = trim($webct_options[1])) { // This is a guess - I really do not know how different webct units are separated... $webctunits = explode(':', $webctunits); $unitrec->multiplier = 1.0; // Webct does not seem to support this foreach ($webctunits as $webctunit) { $unitrec->unit = trim($webctunit); $question->units[] = $unitrec; } continue; } if (!empty($question->units) && eregi('^:UNITREQ:(.*)', $line, $webct_options) && !$webct_options[1]) { // There are units but units are not required so add the no unit alternative // We can but hope that the UNITS property always appear before this property $unitrec->unit = ''; $unitrec->multiplier = 1.0; $question->units[] = $unitrec; continue; } if (!empty($question->units) && eregi('^:UNITCASE:', $line)) { // This could be important but I was not able to figure out how // it works so I ignore it for now continue; } if (isset($question->qtype )&& CALCULATED == $question->qtype && eregi('^:ANSTYPE:dec', $line)) { $question->correctanswerformat[$currentchoice]='1'; continue; } if (isset($question->qtype )&& CALCULATED == $question->qtype && eregi('^:ANSTYPE:sig', $line)) { $question->correctanswerformat[$currentchoice]='2'; continue; } } if (sizeof($errors) > 0) { echo "".get_string("errorsdetected", "quiz", sizeof($errors))."
".get_string("warningsdetected", "quiz", sizeof($warnings))."