mirror of
https://github.com/moodle/moodle.git
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0ae982231f
Classes now have discrete names and methods to identify import/export capability added. Detecting function factored out into locallib.php
664 lines
28 KiB
PHP
664 lines
28 KiB
PHP
<?php // $Id$
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///////////////////////////////////////////////////////////////////////////
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// //
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// WebCT FORMAT //
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// //
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///////////////////////////////////////////////////////////////////////////
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// //
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// NOTICE OF COPYRIGHT //
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// //
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// Part of Moodle - Modular Object-Oriented Dynamic Learning Environment //
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// http://moodle.com //
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// //
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// Copyright (C) 2004 ASP Consulting http://www.asp-consulting.net //
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// //
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// This program 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 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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// Based on format.php, included by ../../import.php
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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, $string);
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}
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class quiz_format_webct_modified_calculated_qtype extends quiz_calculated_qtype {
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// We need to make a modification of this qtype so that
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// it will be able to save webct style calculated questions
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// The difference between webct and Moodle is that webct
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// pass the individual data items as part of the question
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// while Moodle core treat them separately
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function save_question_options($question, $options = false) {
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if (false !== $options) {
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// function is called from save_question...
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return parent::save_question_options($question, $options);
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}
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// function is called from format.php...
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$datasetdatas = $question->datasets;
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// Set dataset
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$form->dataset = array();
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foreach ($datasetdatas as $datasetname => $notimportant) {
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// Literal - question local - name
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$form->dataset[] = "1-0-$datasetname";
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}
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$subtypeoptions->answers = $question->answers;
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$subtypeoptions->units = $question->units;
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unset($question->datasets);
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unset($question->answers);
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unset($question->units);
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$this->save_question($question, $form, 'not used', $subtypeoptions);
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// Save dataset options and items...
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// Get datasetdefinitions
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global $CFG;
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$datasetdefs = get_records_sql(
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"SELECT a.*
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FROM {$CFG->prefix}quiz_dataset_definitions a,
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{$CFG->prefix}quiz_question_datasets b
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WHERE a.id = b.datasetdefinition
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AND b.question = '$question->id' ");
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foreach ($datasetdefs as $datasetdef) {
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$datasetdata = $datasetdatas[$datasetdef->name];
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// Set items and retrieve ->itemcout
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$item->definition = $datasetdef->id;
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for ($item->number=1 ; isset($datasetdata->items["$item->number"]) ; ++$item->number) {
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$item->value = $datasetdata->items["$item->number"];
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if (!insert_record('quiz_dataset_items', $item)) {
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error("Unable to insert dataset item $item->number with $item->value for $datasetdef->name");
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}
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}
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$datasetdef->itemcount = $item->number - 1;
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// Retrieve ->options
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if (is_numeric($datasetdata->min) && is_numeric($datasetdata->max)
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&& $datasetdata->min <= $datasetdata->max) {
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if (is_numeric($datasetdata->dec)) {
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$dec = max(0, ceil($datasetdata->dec));
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} else {
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$dec = 1; // A try
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}
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$datasetdef->options = "uniform:$datasetdata->min:$datasetdata->max:$dec";
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} else {
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$datasetdef->options = '';
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}
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// Save definition
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if ($datasetdef->itemcount || $datasetdef->options) {
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if (!update_record('quiz_dataset_definitions', $datasetdef)) {
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error("Unable to update dataset definition $datasetdef->name on question $question->id");
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}
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}
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}
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// Done
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return true;
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}
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}
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$QUIZ_QTYPES[CALCULATED] = new quiz_format_webct_modified_calculated_qtype();
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function quiz_format_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 (ereg('[0-9.](e|E|\\*10\\*\\*)\\([+-]?[0-9]+\\)', $formula, $regs)) {
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$formula = str_replace(
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$regs[0], ereg_replace('[)(]', '', $regs[0]), $formula);
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}
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// Replace *10** with e where possible
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while (ereg(
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'(^[+-]?|[^eE][+-]|[^0-9eE+-])[0-9.]+\\*10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)',
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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]), $formula);
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}
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// Replace other 10** with 1e where possible
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while (ereg('(^|[^0-9.eE])10\\*\\*[+-]?[0-9]+([^0-9.eE]|$)', $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 $base
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if (ereg('^(.*[^0-9.eE])?(([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?|\\{[^}]*\\})$',
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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] = $regs[1];
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} else if (ereg('\\)$', $splits[0])) {
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// Find the start of this parenthesis
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$deep = 1;
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for ($i = 1 ; $deep ; ++$i) {
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if (!ereg('^(.*[^[:alnum:]_])?([[:alnum:]_]*([)(])([^)(]*[)(]){'.$i.'})$',
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$splits[0], $regs)) {
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error("Parenthesis before ** is not properly started in $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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error("Impossible character $regs[3] detected as parenthesis character");
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}
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}
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$base = $regs[2];
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$splits[0] = $regs[1];
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} else {
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error("Bad base before **: $splits[0]**");
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}
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// Find $exp (similar to above but a little easier)
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if (ereg('^([+-]?(\\{[^}]\\}|([0-9]+(\\.[0-9]*)?|\\.[0-9]+)([eE][+-]?[0-9]+)?))(.*)',
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$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 (ereg('^[+-]?[[: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 (!ereg('^([+-]?[[:alnum:]_]*([)(][^)(]*){'.$i.'}([)(]))(.*)',
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$splits[1], $regs)) {
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error("Parenthesis after ** is not properly closed in **$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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error("Impossible character $regs[3] detected as parenthesis character");
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}
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}
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$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 $formula;
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}
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class quiz_format_webct extends quiz_default_format {
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function provide_import() {
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return true;
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}
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function readquestions ($lines) {
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$qtypecalculated = new quiz_format_webct_modified_calculated_qtype();
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$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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$warnings = array();
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$webct_options = array();
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$ignore_rest_of_question = FALSE;
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$nLineCounter = 0;
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$nQuestionStartLine = 0;
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$bIsHTMLText = FALSE;
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$lines[] = ":EOF:"; // for an easiest processing of the last line
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foreach ($lines as $line) {
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$nLineCounter++;
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// Processing multiples lines strings
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if (isset($questiontext) and is_string($questiontext)) {
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if (ereg("^:",$line)) {
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$question->questiontext = addslashes(trim($questiontext));
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unset($questiontext);
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}
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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($answertext)) {
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if (ereg("^:",$line)) {
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$answertext = addslashes(trim($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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}
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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($responsetext)) {
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if (ereg("^:",$line)) {
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$question->subquestions[$currentchoice] = addslashes(trim($responsetext));
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unset($responsetext);
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}
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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($feedbacktext)) {
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if (ereg("^:",$line)) {
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$question->feedback[$currentchoice] = addslashes(trim($feedbacktext));
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unset($feedbacktext);
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}
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else {
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$feedbacktext .= str_replace('\:', ':', $line);
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continue;
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}
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}
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$line = trim($line);
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if (eregi("^:(TYPE|EOF):",$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 = $question->questiontext;
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}
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if (strlen($question->name) > 255) {
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$question->name = substr($question->name,0,250)."...";
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$warnings[] = get_string("questionnametoolong", "quiz", $nQuestionStartLine);
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}
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if (!isset($question->defaultgrade)) {
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$question->defaultgrade = 1;
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}
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if (!isset($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", "quiz", $nQuestionStartLine);
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$QuestionOK = FALSE;
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}
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if (sizeof($question->answer) < 1) { // a question must have at least 1 answer
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$errors[] = get_string("missinganswer", "quiz", $nQuestionStartLine);
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$QuestionOK = FALSE;
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}
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else {
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// Perform string length check
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foreach ($question->answer as $key => $dataanswer) {
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if (strlen($dataanswer) > 255) {
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$question->answer[$key] = substr($dataanswer,0,250)."...";
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$warnings[] = get_string("answertoolong", "quiz", $nQuestionStartLine);
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}
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}
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$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", "quiz", $nLineCounter).get_string("fractionsnomax", "quiz", $maxfraction);
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$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", "quiz", $nLineCounter).get_string("fractionsnomax", "quiz", $maxfraction);
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$QuestionOK = FALSE;
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}
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} else {
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$totalfraction = round($totalfraction,2);
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if ($totalfraction != 1) {
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echo "<p>$totalfraction</p>";
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$totalfraction = $totalfraction * 100;
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$errors[] = "'$question->name': ".get_string("wronggrade", "quiz", $nLineCounter).get_string("fractionsaddwrong", "quiz", $totalfraction);
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$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 = quiz_qtype_calculated_find_formula_errors($answer->answer)) {
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$warnings[] = "'$question->name': ". $formulaerror;
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$QuestionOK = FALSE;
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}
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}
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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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}
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}
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$nQuestionStartLine = $nLineCounter;
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}
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// Processing Question Header
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if (eregi("^:TYPE:MC:1(.*)",$line,$webct_options)) {
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// Multiple Choice Question with only one good answer
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$question->qtype = MULTICHOICE;
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$question->single = 1; // Only one answer is allowed
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$ignore_rest_of_question = FALSE;
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continue;
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}
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if (eregi("^:TYPE:MC:N(.*)",$line,$webct_options)) {
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// Multiple Choice Question with several good answers
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$question->qtype = MULTICHOICE;
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$question->single = 0; // Many answers allowed
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$ignore_rest_of_question = FALSE;
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continue;
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}
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if (eregi("^:TYPE:S",$line)) {
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// Short Answer Question
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$question->qtype = SHORTANSWER;
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$question->usecase = 0; // Ignore case
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$ignore_rest_of_question = FALSE;
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continue;
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}
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if (eregi("^:TYPE:C",$line)) {
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// Calculated Question
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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->datasets = 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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$currentchoice = -1;
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$ignore_rest_of_question = FALSE;
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continue;
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}
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if (eregi("^:TYPE:M",$line)) {
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// Match Question
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$question->qtype = MATCH;
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$ignore_rest_of_question = FALSE; // match question processing is not debugged
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continue;
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}
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if (eregi("^:TYPE:P",$line)) {
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// Paragraph Question
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$warnings[] = get_string("paragraphquestion", "quiz", $nLineCounter);
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$ignore_rest_of_question = TRUE; // Question Type not handled by Moodle
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continue;
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}
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if (eregi("^:TYPE:",$line)) {
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// Unknow Question
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$warnings[] = get_string("unknowntype", "quiz", $nLineCounter);
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$ignore_rest_of_question = TRUE; // Question Type not handled by Moodle
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continue;
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}
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if ($ignore_rest_of_question) {
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continue;
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}
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if (eregi("^:TITLE:(.*)",$line,$webct_options)) {
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$name = trim($webct_options[1]);
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if (strlen($name) > 255) {
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$name = substr($name,0,250)."...";
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$warnings[] = get_string("questionnametoolong", "quiz", $nLineCounter);
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}
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$question->name = addslashes($name);
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continue;
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}
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if (eregi("^:IMAGE:(.*)",$line,$webct_options)) {
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$filename = trim($webct_options[1]);
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if (eregi("^http://",$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:
|
|
if (CALCULATED == $question->qtype && ereg(
|
|
"^:([[:lower:]].*|::.*)-(MIN|MAX|DEC|VAL([0-9]+))::?:?($webctnumberregex)", $line, $webct_options)) {
|
|
$datasetname = ereg_replace('^::', '', $webct_options[1]);
|
|
$datasetvalue = quiz_format_webct_convert_formula($webct_options[4]);
|
|
switch ($webct_options[2]) {
|
|
case 'MIN':
|
|
$question->datasets[$datasetname]->min = $datasetvalue;
|
|
break;
|
|
case 'MAX':
|
|
$question->datasets[$datasetname]->max = $datasetvalue;
|
|
break;
|
|
case 'DEC':
|
|
$datasetvalue = floor($datasetvalue); // int only!
|
|
$question->datasets[$datasetname]->dec = max(0, $datasetvalue);
|
|
break;
|
|
default:
|
|
// The VAL case:
|
|
$question->datasets[$datasetname]->items[$webct_options[3]] = $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]->answer =
|
|
quiz_format_webct_convert_formula($webct_options[1]);
|
|
|
|
// Default settings:
|
|
$question->answers[$currentchoice]->fraction = 1.0;
|
|
$question->answers[$currentchoice]->tolerance = 0.0;
|
|
$question->answers[$currentchoice]->tolerancetype = 2; // nominal (units in webct)
|
|
$question->answers[$currentchoice]->feedback = '';
|
|
$question->answers[$currentchoice]->correctanswerlength = 4;
|
|
|
|
$datasetnames = $qtypecalculated->find_dataset_names($webct_options[1]);
|
|
foreach ($datasetnames as $datasetname) {
|
|
$question->datasets[$datasetname]->items = array();
|
|
}
|
|
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 (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
|
|
$question->answers[$currentchoice]->correctanswerlength = $webct_options[1];
|
|
continue;
|
|
}
|
|
|
|
if (CALCULATED == $question->qtype && eregi("^:TOL:($webctnumberregex)", $line, $webct_options)) {
|
|
// We can but hope that this always appear before the TOL property
|
|
$question->answers[$currentchoice]->tolerance =
|
|
quiz_format_webct_convert_formula($webct_options[1]);
|
|
continue;
|
|
}
|
|
|
|
if (CALCULATED == $question->qtype && eregi('^:TOLTYPE:percent', $line)) {
|
|
// Percentage case is handled as relative in Moodle:
|
|
$question->answers[$currentchoice]->tolerance /= 100;
|
|
$question->answers[$currentchoice]->tolerancetype = 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 (CALCULATED == $question->qtype && eregi('^:ANSTYPE:dec', $line)) {
|
|
// Houston - we have a problem
|
|
// Moodle does not support this - we try something defensively by
|
|
// setting the correct answer length to 5, it shoud be enough for
|
|
// most cases
|
|
$question->answers[$currentchoice]->correctanswerlength = 5;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (sizeof($errors) > 0) {
|
|
echo "<p>".get_string("errorsdetected", "quiz", sizeof($errors))."</p><ul>";
|
|
foreach($errors as $error) {
|
|
echo "<li>$error</li>";
|
|
}
|
|
echo "</ul>";
|
|
unset($questions); // no questions imported
|
|
}
|
|
|
|
if (sizeof($warnings) > 0) {
|
|
echo "<p>".get_string("warningsdetected", "quiz", sizeof($warnings))."</p><ul>";
|
|
foreach($warnings as $warning) {
|
|
echo "<li>$warning</li>";
|
|
}
|
|
echo "</ul>";
|
|
}
|
|
return $questions;
|
|
}
|
|
}
|
|
|
|
?>
|