Jean-Michel Vedrine
661 lines
29 KiB
PHP
661 lines
29 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Web CT question importer.
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*
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* @package qformat_webct
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* @copyright 2004 ASP Consulting http://www.asp-consulting.net
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/**
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* Manipulate HTML editites in a string. Used by WebCT import.
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* @param string $string
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* @return string
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*/
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function unhtmlentities($string) {
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$search = array ("'<script[?>]*?>.*?</script>'si", // Remove javascript.
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"'<[\/\!]*?[^<?>]*?>'si", // Remove HTML tags.
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"'([\r\n])[\s]+'", // Remove spaces.
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"'&(quot|#34);'i", // Remove HTML entites.
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"'&(amp|#38);'i",
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"'&(lt|#60);'i",
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"'&(gt|#62);'i",
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"'&(nbsp|#160);'i",
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"'&(iexcl|#161);'i",
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"'&(cent|#162);'i",
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"'&(pound|#163);'i",
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"'&(copy|#169);'i",
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"'&#(\d+);'e"); // Evaluate like PHP.
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$replace = array ("",
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"",
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"\\1",
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"\"",
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"&",
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"<",
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"?>",
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" ",
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chr(161),
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chr(162),
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chr(163),
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chr(169),
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"chr(\\1)");
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return preg_replace ($search, $replace, $string);
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}
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/**
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* Helper function for WebCT import.
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* @param unknown_type $formula
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*/
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function qformat_webct_convert_formula($formula) {
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// Remove empty space, as it would cause problems otherwise.
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$formula = str_replace(' ', '', $formula);
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// Remove paranthesis after e,E and *10**.
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while (preg_match('~[0-9.](e|E|\\*10\\*\\*)\\([+-]?[0-9]+\\)~', $formula, $regs)) {
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$formula = str_replace(
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$regs[0], preg_replace('/[)(]/', '', $regs[0]), $formula);
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}
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// Replace *10** with e where possible.
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while (preg_match('~(^[+-]?|[^eE][+-]|[^0-9eE+-])[0-9.]+\\*10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)~',
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$formula, $regs)) {
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$formula = str_replace(
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$regs[0], str_replace('*10**', 'e', $regs[0]), $formula);
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}
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// Replace other 10** with 1e where possible.
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while (preg_match('~(^|[^0-9.eE])10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)~', $formula, $regs)) {
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$formula = str_replace(
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$regs[0], str_replace('10**', '1e', $regs[0]), $formula);
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}
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// Replace all other base**exp with the PHP equivalent function pow(base,exp)
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// (Pretty tricky to exchange an operator with a function).
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while (2 == count($splits = explode('**', $formula, 2))) {
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// Find $base.
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if (preg_match('~^(.*[^0-9.eE])?(([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?|\\{[^}]*\\})$~',
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$splits[0], $regs)) {
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// The simple cases.
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$base = $regs[2];
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$splits[0] = $regs[1];
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} else if (preg_match('~\\)$~', $splits[0])) {
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// Find the start of this parenthesis.
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$deep = 1;
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for ($i = 1; $deep; ++$i) {
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if (!preg_match('~^(.*[^[:alnum:]_])?([[:alnum:]_]*([)(])([^)(]*[)(]){'.$i.'})$~',
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$splits[0], $regs)) {
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print_error("parenthesisinproperstart", 'question', '', $splits[0]);
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}
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if ('(' == $regs[3]) {
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--$deep;
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} else if (')' == $regs[3]) {
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++$deep;
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} else {
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print_error('impossiblechar', 'question', '', $regs[3]);
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}
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}
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$base = $regs[2];
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$splits[0] = $regs[1];
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} else {
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print_error('badbase', 'question', '', $splits[0]);
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}
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// Find $exp (similar to above but a little easier).
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if (preg_match('~^([+-]?(\\{[^}]\\}|([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?))(.*)~',
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$splits[1], $regs)) {
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// The simple case.
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$exp = $regs[1];
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$splits[1] = $regs[6];
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} else if (preg_match('~^[+-]?[[:alnum:]_]*\\(~', $splits[1])) {
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// Find the end of the parenthesis.
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$deep = 1;
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for ($i = 1; $deep; ++$i) {
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if (!preg_match('~^([+-]?[[:alnum:]_]*([)(][^)(]*){'.$i.'}([)(]))(.*)~',
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$splits[1], $regs)) {
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print_error("parenthesisinproperclose", 'question', '', $splits[1]);
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}
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if (')' == $regs[3]) {
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--$deep;
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} else if ('(' == $regs[3]) {
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++$deep;
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} else {
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print_error("impossiblechar", 'question');
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}
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}
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$exp = $regs[1];
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$splits[1] = $regs[4];
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}
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// Replace it!
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$formula = "$splits[0]pow($base,$exp)$splits[1]";
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}
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// Nothing more is known to need to be converted.
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return $formula;
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}
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/**
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* Web CT question importer.
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*
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* @copyright 2004 ASP Consulting http://www.asp-consulting.net
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class qformat_webct extends qformat_default {
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public function provide_import() {
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return true;
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}
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protected function readquestions($lines) {
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$webctnumberregex =
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'[+-]?([0-9]+(\\.[0-9]*)?|\\.[0-9]+)((e|E|\\*10\\*\\*)([+-]?[0-9]+|\\([+-]?[0-9]+\\)))?';
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$questions = array();
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$errors = array();
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$warnings = array();
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$webctoptions = array();
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$ignorerestofquestion = false;
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$nlinecounter = 0;
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$nquestionstartline = 0;
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$bishtmltext = false;
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$lines[] = ":EOF:"; // For an easiest processing of the last line.
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// We don't call defaultquestion() here, it will be called later.
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foreach ($lines as $line) {
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$nlinecounter++;
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$line = iconv("Windows-1252", "UTF-8", $line);
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// Processing multiples lines strings.
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if (isset($questiontext) and is_string($questiontext)) {
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if (preg_match("~^:~", $line)) {
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$question->questiontext = trim($questiontext);
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unset($questiontext);
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} else {
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$questiontext .= str_replace('\:', ':', $line);
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continue;
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}
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}
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if (isset($answertext) and is_string($answertext)) {
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if (preg_match("~^:~", $line)) {
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$answertext = trim($answertext);
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$question->answer[$currentchoice] = $answertext;
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$question->subanswers[$currentchoice] = $answertext;
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unset($answertext);
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} else {
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$answertext .= str_replace('\:', ':', $line);
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continue;
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}
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}
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if (isset($responsetext) and is_string($responsetext)) {
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if (preg_match("~^:~", $line)) {
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$question->subquestions[$currentchoice] = trim($responsetext);
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unset($responsetext);
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} else {
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$responsetext .= str_replace('\:', ':', $line);
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continue;
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}
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}
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if (isset($feedbacktext) and is_string($feedbacktext)) {
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if (preg_match("~^:~", $line)) {
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$question->feedback[$currentchoice] = trim($feedbacktext);
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unset($feedbacktext);
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} else {
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$feedbacktext .= str_replace('\:', ':', $line);
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continue;
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}
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}
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if (isset($generalfeedbacktext) and is_string($generalfeedbacktext)) {
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if (preg_match("~^:~", $line)) {
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$question->tempgeneralfeedback= trim($generalfeedbacktext);
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unset($generalfeedbacktext);
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} else {
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$generalfeedbacktext .= str_replace('\:', ':', $line);
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continue;
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}
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}
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$line = trim($line);
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if (preg_match("~^:(TYPE|EOF):~i", $line)) {
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// New Question or End of File.
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if (isset($question)) { // If previous question exists, complete, check and save it.
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// Setup default value of missing fields.
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if (!isset($question->name)) {
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$question->name = $this->create_default_question_name(
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$question->questiontext, get_string('questionname', 'question'));
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}
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if (!isset($question->defaultmark)) {
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$question->defaultmark = 1;
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}
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if (!isset($question->image)) {
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$question->image = "";
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}
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// Perform sanity checks.
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$questionok = true;
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if (strlen($question->questiontext) == 0) {
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$warnings[] = get_string('missingquestion', 'qformat_webct', $nquestionstartline);
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$questionok = false;
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}
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if (count($question->answer) < 1) { // A question must have at least 1 answer.
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$errors[] = get_string('missinganswer', 'qformat_webct', $nquestionstartline);
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$questionok = false;
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} else {
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// Create empty feedback array.
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foreach ($question->answer as $key => $dataanswer) {
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if (!isset($question->feedback[$key])) {
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$question->feedback[$key] = '';
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}
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}
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// This tempgeneralfeedback allows the code to work with versions from 1.6 to 1.9.
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// When question->generalfeedback is undefined, the webct feedback is added to each answer feedback.
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if (isset($question->tempgeneralfeedback)) {
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if (isset($question->generalfeedback)) {
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$question->generalfeedback = $question->tempgeneralfeedback;
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} else {
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foreach ($question->answer as $key => $dataanswer) {
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if ($question->tempgeneralfeedback !='') {
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$question->feedback[$key] = $question->tempgeneralfeedback
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.'<br/>'.$question->feedback[$key];
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}
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}
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}
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unset($question->tempgeneralfeedback);
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}
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$maxfraction = -1;
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$totalfraction = 0;
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foreach ($question->fraction as $fraction) {
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if ($fraction > 0) {
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$totalfraction += $fraction;
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}
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if ($fraction > $maxfraction) {
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$maxfraction = $fraction;
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}
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}
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switch ($question->qtype) {
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case 'shortanswer':
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if ($maxfraction != 1) {
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$maxfraction = $maxfraction * 100;
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$errors[] = "'$question->name': ".get_string('wronggrade', 'qformat_webct', $nlinecounter)
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.' '.get_string('fractionsnomax', 'question', $maxfraction);
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$questionok = false;
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}
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break;
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case 'multichoice':
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if ($question->single) {
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if ($maxfraction != 1) {
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$maxfraction = $maxfraction * 100;
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$errors[] = "'$question->name': ".get_string('wronggrade', 'qformat_webct', $nlinecounter)
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.' '.get_string('fractionsnomax', 'question', $maxfraction);
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$questionok = false;
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}
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} else {
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$totalfraction = round($totalfraction, 2);
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if ($totalfraction != 1) {
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$totalfraction = $totalfraction * 100;
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$errors[] = "'$question->name': ".get_string('wronggrade', 'qformat_webct', $nlinecounter)
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.' '.get_string('fractionsaddwrong', 'question', $totalfraction);
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$questionok = false;
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}
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}
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break;
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case 'calculated':
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foreach ($question->answers as $answer) {
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if ($formulaerror = qtype_calculated_find_formula_errors($answer)) {
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$warnings[] = "'$question->name': ". $formulaerror;
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$questionok = false;
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}
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}
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foreach ($question->dataset as $dataset) {
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$dataset->itemcount=count($dataset->datasetitem);
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}
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$question->import_process = true;
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unset($question->answer); // Not used in calculated question.
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break;
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case 'match':
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// MDL-10680:
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// Switch subquestions and subanswers.
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foreach ($question->subquestions as $id => $subquestion) {
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$temp = $question->subquestions[$id];
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$question->subquestions[$id] = $question->subanswers[$id];
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$question->subanswers[$id] = $temp;
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}
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if (count($question->answer) < 3) {
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// Add a dummy missing question.
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$question->name = 'Dummy question added '.$question->name;
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$question->answer[] = 'dummy';
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$question->subanswers[] = 'dummy';
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$question->subquestions[] = 'dummy';
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$question->fraction[] = '0.0';
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$question->feedback[] = '';
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}
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break;
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default:
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// No problemo.
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}
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}
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if ($questionok) {
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$questions[] = $question; // Store it.
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unset($question); // And prepare a new one.
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$question = $this->defaultquestion();
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}
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}
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$nquestionstartline = $nlinecounter;
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}
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// Processing Question Header.
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if (preg_match("~^:TYPE:MC:1(.*)~i", $line, $webctoptions)) {
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// Multiple Choice Question with only one good answer.
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$question = $this->defaultquestion();
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$question->feedback = array();
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$question->qtype = 'multichoice';
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$question->single = 1; // Only one answer is allowed.
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$ignorerestofquestion = false;
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continue;
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}
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if (preg_match("~^:TYPE:MC:N(.*)~i", $line, $webctoptions)) {
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// Multiple Choice Question with several good answers.
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$question = $this->defaultquestion();
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$question->feedback = array();
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$question->qtype = 'multichoice';
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$question->single = 0; // Many answers allowed.
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$ignorerestofquestion = false;
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continue;
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}
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if (preg_match("~^:TYPE:S~i", $line)) {
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// Short Answer Question.
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$question = $this->defaultquestion();
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$question->feedback = array();
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$question->qtype = 'shortanswer';
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$question->usecase = 0; // Ignore case.
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$ignorerestofquestion = false;
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continue;
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}
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if (preg_match("~^:TYPE:C~i", $line)) {
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// Calculated Question.
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$question = $this->defaultquestion();
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$question->qtype = 'calculated';
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$question->answers = array(); // No problem as they go as :FORMULA: from webct.
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$question->units = array();
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$question->dataset = array();
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// To make us pass the end-of-question sanity checks.
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$question->answer = array('dummy');
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$question->fraction = array('1.0');
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$question->feedback = array();
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$currentchoice = -1;
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$ignorerestofquestion = false;
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continue;
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}
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if (preg_match("~^:TYPE:M~i", $line)) {
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// Match Question.
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$question = $this->defaultquestion();
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$question->qtype = 'match';
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$question->feedback = array();
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$ignorerestofquestion = false; // Match question processing is not debugged.
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continue;
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}
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if (preg_match("~^:TYPE:P~i", $line)) {
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// Paragraph question (essay).
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$warnings[] = get_string("paragraphquestion", "qformat_webct", $nlinecounter);
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unset($question);
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$ignorerestofquestion = true; // Question Type not handled by Moodle.
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continue;
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}
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if (preg_match("~^:TYPE:~i", $line)) {
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// Unknow question type.
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$warnings[] = get_string('unknowntype', 'qformat_webct', $nlinecounter);
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unset($question);
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$ignorerestofquestion = true; // Question Type not handled by Moodle.
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continue;
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}
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if ($ignorerestofquestion) {
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continue;
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}
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if (preg_match("~^:TITLE:(.*)~i", $line, $webctoptions)) {
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$name = trim($webctoptions[1]);
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$question->name = $this->clean_question_name($name);
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continue;
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}
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if (preg_match("~^:IMAGE:(.*)~i", $line, $webctoptions)) {
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$filename = trim($webctoptions[1]);
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if (preg_match("~^http://~i", $filename)) {
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$question->image = $filename;
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}
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continue;
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}
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// Need to put the parsing of calculated items here to avoid ambitiuosness:
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// if question isn't defined yet there is nothing to do here (avoid notices).
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if (!isset($question)) {
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continue;
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}
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if (isset($question->qtype ) && 'calculated' == $question->qtype && preg_match(
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"~^:([[:lower:]].*|::.*)-(MIN|MAX|DEC|VAL([0-9]+))::?:?($webctnumberregex)~", $line, $webctoptions)) {
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$datasetname = preg_replace('/^::/', '', $webctoptions[1]);
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$datasetvalue = qformat_webct_convert_formula($webctoptions[4]);
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switch ($webctoptions[2]) {
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case 'MIN':
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$question->dataset[$datasetname]->min = $datasetvalue;
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break;
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case 'MAX':
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$question->dataset[$datasetname]->max = $datasetvalue;
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break;
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case 'DEC':
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$datasetvalue = floor($datasetvalue); // Int only!
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$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('~^:FORMULA:(.*)~i', $line, $webctoptions)) {
|
|
// Answer for a calculated question.
|
|
++$currentchoice;
|
|
$question->answers[$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] = '';
|
|
$question->correctanswerlength[$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($errors) > 0) {
|
|
echo '<p>'.get_string('errorsdetected', 'qformat_webct', count($errors)).'</p><ul>';
|
|
foreach ($errors as $error) {
|
|
echo "<li>$error</li>";
|
|
}
|
|
echo '</ul>';
|
|
unset($questions); // No questions imported.
|
|
}
|
|
|
|
if (count($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;
|
|
}
|
|
}
|