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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Web CT question importer.
*
* @package qformat_webct
* @copyright 2004 ASP Consulting http://www.asp-consulting.net
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Manipulate HTML editites in a string. Used by WebCT import.
* @param string $string
* @return string
*/
function unhtmlentities($string) {
$search = array ("'<script[?>]*?>.*?</script>'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);
}
/**
* Helper function for WebCT import.
* @param unknown_type $formula
*/
function qformat_webct_convert_formula($formula) {
// Remove empty space, as it would cause problems otherwise.
$formula = str_replace(' ', '', $formula);
// Remove paranthesis after e,E and *10**.
while (preg_match('~[0-9.](e|E|\\*10\\*\\*)\\([+-]?[0-9]+\\)~', $formula, $regs)) {
$formula = str_replace(
$regs[0], preg_replace('/[)(]/', '', $regs[0]), $formula);
}
// Replace *10** with e where possible.
while (preg_match('~(^[+-]?|[^eE][+-]|[^0-9eE+-])[0-9.]+\\*10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)~',
$formula, $regs)) {
$formula = str_replace(
$regs[0], str_replace('*10**', 'e', $regs[0]), $formula);
}
// Replace other 10** with 1e where possible.
while (preg_match('~(^|[^0-9.eE])10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)~', $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 $base.
if (preg_match('~^(.*[^0-9.eE])?(([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?|\\{[^}]*\\})$~',
$splits[0], $regs)) {
// The simple cases.
$base = $regs[2];
$splits[0] = $regs[1];
} else if (preg_match('~\\)$~', $splits[0])) {
// Find the start of this parenthesis.
$deep = 1;
for ($i = 1; $deep; ++$i) {
if (!preg_match('~^(.*[^[:alnum:]_])?([[:alnum:]_]*([)(])([^)(]*[)(]){'.$i.'})$~',
$splits[0], $regs)) {
print_error('parenthesisinproperstart', 'question', '', $splits[0]);
}
if ('(' == $regs[3]) {
--$deep;
} else if (')' == $regs[3]) {
++$deep;
} else {
print_error('impossiblechar', 'question', '', $regs[3]);
}
}
$base = $regs[2];
$splits[0] = $regs[1];
} else {
print_error('badbase', 'question', '', $splits[0]);
}
// Find $exp (similar to above but a little easier).
if (preg_match('~^([+-]?(\\{[^}]\\}|([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?))(.*)~',
$splits[1], $regs)) {
// The simple case.
$exp = $regs[1];
$splits[1] = $regs[6];
} else if (preg_match('~^[+-]?[[:alnum:]_]*\\(~', $splits[1])) {
// Find the end of the parenthesis.
$deep = 1;
for ($i = 1; $deep; ++$i) {
if (!preg_match('~^([+-]?[[:alnum:]_]*([)(][^)(]*){'.$i.'}([)(]))(.*)~',
$splits[1], $regs)) {
print_error('parenthesisinproperclose', 'question', '', $splits[1]);
}
if (')' == $regs[3]) {
--$deep;
} else if ('(' == $regs[3]) {
++$deep;
} else {
print_error('impossiblechar', 'question');
}
}
$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;
}
/**
* Web CT question importer.
*
* @copyright 2004 ASP Consulting http://www.asp-consulting.net
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qformat_webct extends qformat_default {
/** @var string path to the temporary directory. */
public $tempdir = '';
/**
* This plugin provide import
* @return bool true
*/
public function provide_import() {
return true;
}
public function can_import_file($file) {
$mimetypes = array(
mimeinfo('type', '.txt'),
mimeinfo('type', '.zip')
);
return in_array($file->get_mimetype(), $mimetypes);
}
public function mime_type() {
return mimeinfo('type', '.zip');
}
/**
* Store an image file in a draft filearea
* @param array $text, if itemid element don't exists it will be created
* @param string tempdir path to root of image tree
* @param string filepathinsidetempdir path to image in the tree
* @param string filename image's name
* @return string new name of the image as it was stored
*/
protected function store_file_for_text_field(&$text, $tempdir, $filepathinsidetempdir, $filename) {
global $USER;
$fs = get_file_storage();
if (empty($text['itemid'])) {
$text['itemid'] = file_get_unused_draft_itemid();
}
// As question file areas don't support subdirs,
// convert path to filename.
// So that images with same name can be imported.
$newfilename = clean_param(str_replace('/', '__', $filepathinsidetempdir . '__' . $filename), PARAM_FILE);
$filerecord = array(
'contextid' => context_user::instance($USER->id)->id,
'component' => 'user',
'filearea' => 'draft',
'itemid' => $text['itemid'],
'filepath' => '/',
'filename' => $newfilename,
);
$fs->create_file_from_pathname($filerecord, $tempdir . '/' . $filepathinsidetempdir . '/' . $filename);
return $newfilename;
}
/**
* Given an HTML text with references to images files,
* store all images in a draft filearea,
* and return an array with all urls in text recoded,
* format set to FORMAT_HTML, and itemid set to filearea itemid
* @param string text text to parse and recode
* @return array with keys text, format, itemid.
*/
public function text_field($text) {
$data = array();
// Step one, find all file refs then add to array.
preg_match_all('|<img[^>]+src="([^"]*)"|i', $text, $out); // Find all src refs.
$filepaths = array();
foreach ($out[1] as $path) {
$fullpath = $this->tempdir . '/' . $path;
if (is_readable($fullpath) && !in_array($path, $filepaths)) {
$dirpath = dirname($path);
$filename = basename($path);
$newfilename = $this->store_file_for_text_field($data, $this->tempdir, $dirpath, $filename);
$text = preg_replace("|{$path}|", "@@PLUGINFILE@@/" . $newfilename, $text);
$filepaths[] = $path;
}
}
$data['text'] = $text;
$data['format'] = FORMAT_HTML;
return $data;
}
/**
* Does any post-processing that may be desired
* Clean the temporary directory if a zip file was imported
* @return bool success
*/
public function importpostprocess() {
if (!empty($this->tempdir)) {
fulldelete($this->tempdir);
}
return true;
}
/**
* Return content of all files containing questions,
* as an array one element for each file found,
* For each file, the corresponding element is an array of lines.
* @param string filename name of file
* @return mixed contents array or false on failure
*/
public function readdata($filename) {
// Find if we are importing a .txt file.
if (strtolower(pathinfo($filename, PATHINFO_EXTENSION)) == 'txt') {
if (!is_readable($filename)) {
$this->error(get_string('filenotreadable', 'error'));
return false;
}
return file($filename);
}
// We are importing a zip file.
// Create name for temporary directory.
$this->tempdir = make_request_directory();
if (is_readable($filename)) {
if (!copy($filename, $this->tempdir . '/webct.zip')) {
$this->error(get_string('cannotcopybackup', 'question'));
fulldelete($this->tempdir);
return false;
}
$packer = get_file_packer('application/zip');
if ($packer->extract_to_pathname($this->tempdir . '/webct.zip', $this->tempdir, null, null, true)) {
$dir = $this->tempdir;
if ((($handle = opendir($dir))) == false) {
// The directory could not be opened.
fulldelete($this->tempdir);
return false;
}
// Create arrays to store files and directories.
$dirfiles = array();
$dirsubdirs = array();
$slash = '/';
// Loop through all directory entries, and construct two temporary arrays containing files and sub directories.
while (false !== ($entry = readdir($handle))) {
if (is_dir($dir. $slash .$entry) && $entry != '..' && $entry != '.') {
$dirsubdirs[] = $dir. $slash .$entry;
} else if ($entry != '..' && $entry != '.') {
$dirfiles[] = $dir. $slash .$entry;
}
}
if ((($handle = opendir($dirsubdirs[0]))) == false) {
// The directory could not be opened.
fulldelete($this->tempdir);
return false;
}
while (false !== ($entry = readdir($handle))) {
if (is_dir($dirsubdirs[0]. $slash .$entry) && $entry != '..' && $entry != '.') {
$dirsubdirs[] = $dirsubdirs[0]. $slash .$entry;
} else if ($entry != '..' && $entry != '.') {
$dirfiles[] = $dirsubdirs[0]. $slash .$entry;
}
}
return file($dirfiles[1]);
} else {
$this->error(get_string('cannotunzip', 'question'));
fulldelete($this->tempdir);
}
} else {
$this->error(get_string('cannotreaduploadfile', 'error'));
fulldelete($this->tempdir);
}
return false;
}
public function readquestions ($lines) {
$webctnumberregex =
'[+-]?([0-9]+(\\.[0-9]*)?|\\.[0-9]+)((e|E|\\*10\\*\\*)([+-]?[0-9]+|\\([+-]?[0-9]+\\)))?';
$questions = array();
$warnings = array();
$webctoptions = array();
$ignorerestofquestion = false;
$nlinecounter = 0;
$nquestionstartline = 0;
$bishtmltext = false;
$lines[] = ":EOF:"; // For an easiest processing of the last line.
// We don't call defaultquestion() here, it will be called later.
foreach ($lines as $line) {
$nlinecounter++;
$line = core_text::convert($line, 'windows-1252', 'utf-8');
// Processing multiples lines strings.
if (isset($questiontext) and is_string($questiontext)) {
if (preg_match("~^:~", $line)) {
$questiontext = $this->text_field(trim($questiontext));
$question->questiontext = $questiontext['text'];
$question->questiontextformat = $questiontext['format'];
if (isset($questiontext['itemid'])) {
$question->questiontextitemid = $questiontext['itemid'];
}
unset($questiontext);
} else {
$questiontext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($answertext) and is_string($answertext)) {
if (preg_match("~^:~", $line)) {
$answertext = trim($answertext);
if ($question->qtype == 'multichoice' || $question->qtype == 'match' ) {
$question->answer[$currentchoice] = $this->text_field($answertext);
$question->subanswers[$currentchoice] = $question->answer[$currentchoice];
} else {
$question->answer[$currentchoice] = $answertext;
$question->subanswers[$currentchoice] = $answertext;
}
unset($answertext);
} else {
$answertext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($responsetext) and is_string($responsetext)) {
if (preg_match("~^:~", $line)) {
$question->subquestions[$currentchoice] = trim($responsetext);
unset($responsetext);
} else {
$responsetext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($feedbacktext) and is_string($feedbacktext)) {
if (preg_match("~^:~", $line)) {
$question->feedback[$currentchoice] = $this->text_field(trim($feedbacktext));
unset($feedbacktext);
} else {
$feedbacktext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($generalfeedbacktext) and is_string($generalfeedbacktext)) {
if (preg_match("~^:~", $line)) {
$question->tempgeneralfeedback = trim($generalfeedbacktext);
unset($generalfeedbacktext);
} else {
$generalfeedbacktext .= str_replace('\:', ':', $line);
continue;
}
}
if (isset($graderinfo) and is_string($graderinfo)) {
if (preg_match("~^:~", $line)) {
$question->graderinfo['text'] = trim($graderinfo);
$question->graderinfo['format'] = FORMAT_HTML;
unset($graderinfo);
} else {
$graderinfo .= str_replace('\:', ':', $line);
continue;
}
}
$line = trim($line);
if (preg_match("~^:(TYPE|EOF):~i", $line)) {
// New Question or End of File.
if (isset($question)) { // If previous question exists, complete, check and save it.
// Setup default value of missing fields.
if (!isset($question->name)) {
$question->name = $this->create_default_question_name(
$question->questiontext, get_string('questionname', 'question'));
}
if (!isset($question->defaultmark)) {
$question->defaultmark = 1;
}
if (!isset($question->image)) {
$question->image = '';
}
// Perform sanity checks.
$questionok = true;
if (strlen($question->questiontext) == 0) {
$warnings[] = get_string('missingquestion', 'qformat_webct', $nquestionstartline);
$questionok = false;
}
if (count($question->answer) < 1) { // A question must have at least 1 answer.
$this->error(get_string('missinganswer', 'qformat_webct', $nquestionstartline), '', $question->name);
$questionok = false;
} else {
// Create empty feedback array.
foreach ($question->answer as $key => $dataanswer) {
if (!isset($question->feedback[$key])) {
$question->feedback[$key]['text'] = '';
$question->feedback[$key]['format'] = FORMAT_HTML;
}
}
// 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)) {
$generalfeedback = $this->text_field($question->tempgeneralfeedback);
$question->generalfeedback = $generalfeedback['text'];
$question->generalfeedbackformat = $generalfeedback['format'];
if (isset($generalfeedback['itemid'])) {
$question->genralfeedbackitemid = $generalfeedback['itemid'];
}
} else {
foreach ($question->answer as $key => $dataanswer) {
if ($question->tempgeneralfeedback != '') {
$question->feedback[$key]['text'] = $question->tempgeneralfeedback
.'<br/>'.$question->feedback[$key]['text'];
}
}
}
unset($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;
$this->error(get_string('wronggrade', 'qformat_webct', $nlinecounter)
.' '.get_string('fractionsnomax', 'question', $maxfraction), '', $question->name);;
$questionok = false;
}
break;
case 'multichoice':
$question = $this->add_blank_combined_feedback($question);
if ($question->single) {
if ($maxfraction != 1) {
$maxfraction = $maxfraction * 100;
$this->error(get_string('wronggrade', 'qformat_webct', $nlinecounter)
.' '.get_string('fractionsnomax', 'question', $maxfraction), '', $question->name);
$questionok = false;
}
} else {
$totalfraction = round($totalfraction, 2);
if ($totalfraction != 1) {
$totalfraction = $totalfraction * 100;
$this->error(get_string('wronggrade', 'qformat_webct', $nlinecounter)
.' '.get_string('fractionsaddwrong', 'qtype_multichoice', $totalfraction),
'', $question->name);
$questionok = false;
}
}
break;
case 'calculated':
foreach ($question->answer as $answer) {
if ($formulaerror = qtype_calculated_find_formula_errors($answer)) {
$warnings[] = "'{$question->name}': ". $formulaerror;
$questionok = false;
}
}
foreach ($question->dataset as $dataset) {
$dataset->itemcount = count($dataset->datasetitem);
}
$question->import_process = true;
break;
case 'match':
// MDL-10680:
// Switch subquestions and subanswers.
$question = $this->add_blank_combined_feedback($question);
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) {
$questions[] = $question; // Store it.
unset($question); // And prepare a new one.
$question = $this->defaultquestion();
}
}
$nquestionstartline = $nlinecounter;
}
// Processing Question Header.
if (preg_match("~^:TYPE:MC:1(.*)~i", $line, $webctoptions)) {
// 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.
$ignorerestofquestion = false;
continue;
}
if (preg_match("~^:TYPE:MC:N(.*)~i", $line, $webctoptions)) {
// Multiple Choice Question with several good answers.
$question = $this->defaultquestion();
$question->feedback = array();
$question->qtype = 'multichoice';
$question->single = 0; // Many answers allowed.
$ignorerestofquestion = false;
continue;
}
if (preg_match("~^:TYPE:S~i", $line)) {
// Short Answer Question.
$question = $this->defaultquestion();
$question->feedback = array();
$question->qtype = 'shortanswer';
$question->usecase = 0; // Ignore case.
$ignorerestofquestion = false;
continue;
}
if (preg_match("~^:TYPE:C~i", $line)) {
// Calculated Question.
$question = $this->defaultquestion();
$question->qtype = 'calculated';
$question->answer = array(); // No problem as they go as :FORMULA: from webct.
$question->units = array();
$question->dataset = array();
$question->fraction = array('1.0');
$question->feedback = array();
$currentchoice = -1;
$ignorerestofquestion = false;
continue;
}
if (preg_match("~^:TYPE:M~i", $line)) {
// Match Question.
$question = $this->defaultquestion();
$question->qtype = 'match';
$question->feedback = array();
$ignorerestofquestion = false; // Match question processing is not debugged.
continue;
}
if (preg_match("~^:TYPE:P~i", $line)) {
// Paragraph Question.
$question = $this->defaultquestion();
$question->qtype = 'essay';
$question->responseformat = 'editor';
$question->responserequired = 1;
$question->responsefieldlines = 15;
$question->attachments = 0;
$question->attachmentsrequired = 0;
$question->graderinfo = array(
'text' => '',
'format' => FORMAT_HTML,
);
$question->feedback = array();
$question->generalfeedback = '';
$question->generalfeedbackformat = FORMAT_HTML;
$question->generalfeedbackfiles = array();
$question->responsetemplate = $this->text_field('');
$question->questiontextformat = FORMAT_HTML;
$ignorerestofquestion = false;
// To make us pass the end-of-question sanity checks.
$question->answer = array('dummy');
$question->fraction = array('1.0');
continue;
}
if (preg_match("~^:TYPE:~i", $line)) {
// Unknow question type.
$warnings[] = get_string('unknowntype', 'qformat_webct', $nlinecounter);
unset($question);
$ignorerestofquestion = true; // Question Type not handled by Moodle.
continue;
}
if ($ignorerestofquestion) {
continue;
}
if (preg_match("~^:TITLE:(.*)~i", $line, $webctoptions)) {
$name = trim($webctoptions[1]);
$question->name = $this->clean_question_name($name);
continue;
}
if (preg_match("~^:IMAGE:(.*)~i", $line, $webctoptions)) {
$filename = trim($webctoptions[1]);
if (preg_match("~^http://~i", $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' == $question->qtype && preg_match(
"~^:([[:lower:]].*|::.*)-(MIN|MAX|DEC|VAL([0-9]+))::?:?({$webctnumberregex})~", $line, $webctoptions)) {
$datasetname = preg_replace('/^::/', '', $webctoptions[1]);
$datasetvalue = qformat_webct_convert_formula($webctoptions[4]);
switch ($webctoptions[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[$webctoptions[3]] = new stdClass();
$question->dataset[$datasetname]->datasetitem[$webctoptions[3]]->itemnumber = $webctoptions[3];
$question->dataset[$datasetname]->datasetitem[$webctoptions[3]]->value = $datasetvalue;
break;
}
continue;
}
$bishtmltext = preg_match("~:H$~i", $line); // True if next lines are coded in HTML.
if (preg_match("~^:QUESTION~i", $line)) {
$questiontext = ''; // Start gathering next lines.
continue;
}
if (preg_match("~^:ANSWER([0-9]+):([^:]+):([0-9\.\-]+):(.*)~i", $line, $webctoptions)) { // Shortanswer.
$currentchoice = $webctoptions[1];
$answertext = $webctoptions[2]; // Start gathering next lines.
$question->fraction[$currentchoice] = ($webctoptions[3]/100);
continue;
}
if (preg_match("~^:ANSWER([0-9]+):([0-9\.\-]+)~i", $line, $webctoptions)) {
$answertext = ''; // Start gathering next lines.
$currentchoice = $webctoptions[1];
$question->fraction[$currentchoice] = ($webctoptions[2]/100);
continue;
}
if (preg_match('~^:ANSWER:~i', $line)) { // Essay.
$graderinfo = ''; // Start gathering next lines.
continue;
}
if (preg_match('~^:FORMULA:(.*)~i', $line, $webctoptions)) {
// Answer for a calculated question.
++$currentchoice;
$question->answer[$currentchoice] =
qformat_webct_convert_formula($webctoptions[1]);
// Default settings.
$question->fraction[$currentchoice] = 1.0;
$question->tolerance[$currentchoice] = 0.0;
$question->tolerancetype[$currentchoice] = 2; // Nominal (units in webct).
$question->feedback[$currentchoice]['text'] = '';
$question->feedback[$currentchoice]['format'] = FORMAT_HTML;
$question->correctanswerlength[$currentchoice] = 4;
$datasetnames =
question_bank::get_qtype('calculated')->find_dataset_names($webctoptions[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 (preg_match("~^:L([0-9]+)~i", $line, $webctoptions)) {
$answertext = ''; // Start gathering next lines.
$currentchoice = $webctoptions[1];
$question->fraction[$currentchoice] = 1;
continue;
}
if (preg_match("~^:R([0-9]+)~i", $line, $webctoptions)) {
$responsetext = ''; // Start gathering next lines.
$currentchoice = $webctoptions[1];
continue;
}
if (preg_match("~^:REASON([0-9]+):?~i", $line, $webctoptions)) {
$feedbacktext = ''; // Start gathering next lines.
$currentchoice = $webctoptions[1];
continue;
}
if (preg_match("~^:FEEDBACK([0-9]+):?~i", $line, $webctoptions)) {
$generalfeedbacktext = ''; // Start gathering next lines.
$currentchoice = $webctoptions[1];
continue;
}
if (preg_match('~^:FEEDBACK:(.*)~i', $line, $webctoptions)) {
$generalfeedbacktext = ''; // Start gathering next lines.
continue;
}
if (preg_match('~^:LAYOUT:(.*)~i', $line, $webctoptions)) {
// Ignore since layout in question_multichoice is no more used in Moodle.
// $webctoptions[1] contains either vertical or horizontal.
continue;
}
if (isset($question->qtype ) && 'calculated' == $question->qtype
&& preg_match('~^:ANS-DEC:([1-9][0-9]*)~i', $line, $webctoptions)) {
// We can but hope that this always appear before the ANSTYPE property.
$question->correctanswerlength[$currentchoice] = $webctoptions[1];
continue;
}
if (isset($question->qtype )&& 'calculated' == $question->qtype
&& preg_match("~^:TOL:({$webctnumberregex})~i", $line, $webctoptions)) {
// We can but hope that this always appear before the TOL property.
$question->tolerance[$currentchoice] =
qformat_webct_convert_formula($webctoptions[1]);
continue;
}
if (isset($question->qtype )&& 'calculated' == $question->qtype && preg_match('~^:TOLTYPE:percent~i', $line)) {
// Percentage case is handled as relative in Moodle.
$question->tolerance[$currentchoice] /= 100;
$question->tolerancetype[$currentchoice] = 1; // Relative.
continue;
}
if (preg_match('~^:UNITS:(.+)~i', $line, $webctoptions)
and $webctunits = trim($webctoptions[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) && preg_match('~^:UNITREQ:(.*)~i', $line, $webctoptions)
&& !$webctoptions[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) && preg_match('~^:UNITCASE:~i', $line)) {
// This could be important but I was not able to figure out how
// it works so I ignore it for now.
continue;
}
if (isset($question->qtype )&& 'calculated' == $question->qtype && preg_match('~^:ANSTYPE:dec~i', $line)) {
$question->correctanswerformat[$currentchoice] = '1';
continue;
}
if (isset($question->qtype )&& 'calculated' == $question->qtype && preg_match('~^:ANSTYPE:sig~i', $line)) {
$question->correctanswerformat[$currentchoice] = '2';
continue;
}
}
if (count($warnings) > 0) {
echo '<p>'.get_string('warningsdetected', 'qformat_webct', count($warnings)).'</p><ul>';
foreach ($warnings as $warning) {
echo "<li>{$warning}</li>";
}
echo '</ul>';
}
return $questions;
}
}