Tim Hunt
4d18892676
Sadly, this involves a small API change, but I don't believe anyone was using the argument I had to remove (because we were sometimes passing a wrong value, and there is not way to compute the right value at that point in the code.) Also sadly, the code to compute the context we are importing into is now rather spaghetti-like, but it works.
314 lines
9.9 KiB
PHP
314 lines
9.9 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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* Examview question importer.
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*
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* @package qformat
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* @subpackage examview
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* @copyright 2005 Howard Miller
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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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require_once ($CFG->libdir . '/xmlize.php');
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/**
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* Examview question importer.
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*
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* @copyright 2005 Howard Miller
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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_examview extends qformat_default {
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public $qtypes = array(
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'tf' => TRUEFALSE,
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'mc' => MULTICHOICE,
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'yn' => TRUEFALSE,
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'co' => SHORTANSWER,
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'ma' => MATCH,
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'mtf' => 99,
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'nr' => NUMERICAL,
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'pr' => 99,
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'es' => 99,
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'ca' => 99,
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'ot' => 99,
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'sa' => ESSAY
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);
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public $matching_questions = array();
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function provide_import() {
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return true;
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}
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/**
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* unxmlise reconstructs part of the xml data structure in order
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* to identify the actual data therein
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* @param array $xml section of the xml data structure
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* @return string data with evrything else removed
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*/
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function unxmlise( $xml ) {
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// if it's not an array then it's probably just data
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if (!is_array($xml)) {
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$text = s($xml);
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}
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else {
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// otherwise parse the array
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$text = '';
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foreach ($xml as $tag=>$data) {
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// if tag is '@' then it's attributes and we don't care
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if ($tag!=='@') {
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$text = $text . $this->unxmlise( $data );
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}
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}
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}
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// currently we throw the tags we found
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$text = strip_tags($text);
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return $text;
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}
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function parse_matching_groups($matching_groups)
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{
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if (empty($matching_groups)) {
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return;
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}
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foreach($matching_groups as $match_group) {
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$newgroup = NULL;
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$groupname = trim($match_group['@']['name']);
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$questiontext = $this->unxmlise($match_group['#']['text'][0]['#']);
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$newgroup->questiontext = trim($questiontext);
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$newgroup->subchoices = array();
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$newgroup->subquestions = array();
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$newgroup->subanswers = array();
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$choices = $match_group['#']['choices']['0']['#'];
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foreach($choices as $key => $value) {
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if (strpos(trim($key),'choice-') !== FALSE) {
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$key = strtoupper(trim(str_replace('choice-', '', $key)));
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$newgroup->subchoices[$key] = trim($value['0']['#']);
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}
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}
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$this->matching_questions[$groupname] = $newgroup;
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}
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}
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function parse_ma($qrec, $groupname)
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{
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$match_group = $this->matching_questions[$groupname];
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$phrase = trim($this->unxmlise($qrec['text']['0']['#']));
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$answer = trim($this->unxmlise($qrec['answer']['0']['#']));
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$answer = strip_tags( $answer );
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$match_group->subquestions[] = $phrase;
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$match_group->subanswers[] = $match_group->subchoices[$answer];
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$this->matching_questions[$groupname] = $match_group;
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return NULL;
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}
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function process_matches(&$questions)
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{
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if (empty($this->matching_questions)) {
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return;
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}
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foreach($this->matching_questions as $match_group) {
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$question = $this->defaultquestion();
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$htmltext = s($match_group->questiontext);
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$question->questiontext = $htmltext;
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$question->name = $question->questiontext;
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$question->qtype = MATCH;
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$question->subquestions = array();
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$question->subanswers = array();
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foreach($match_group->subquestions as $key => $value) {
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$htmltext = s($value);
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$question->subquestions[] = $htmltext;
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$htmltext = s($match_group->subanswers[$key]);
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$question->subanswers[] = $htmltext;
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}
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$questions[] = $question;
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}
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}
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function cleanUnicode($text) {
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return str_replace('’', "'", $text);
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}
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protected function readquestions($lines) {
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/// Parses an array of lines into an array of questions,
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/// where each item is a question object as defined by
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/// readquestion().
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$questions = array();
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$currentquestion = array();
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$text = implode($lines, ' ');
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$text = $this->cleanUnicode($text);
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$xml = xmlize($text, 0);
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if (!empty($xml['examview']['#']['matching-group'])) {
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$this->parse_matching_groups($xml['examview']['#']['matching-group']);
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}
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$questionNode = $xml['examview']['#']['question'];
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foreach($questionNode as $currentquestion) {
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if ($question = $this->readquestion($currentquestion)) {
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$questions[] = $question;
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}
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}
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$this->process_matches($questions);
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return $questions;
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}
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// end readquestions
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function readquestion($qrec)
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{
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$type = trim($qrec['@']['type']);
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$question = $this->defaultquestion();
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if (array_key_exists($type, $this->qtypes)) {
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$question->qtype = $this->qtypes[$type];
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}
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else {
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$question->qtype = null;
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}
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$question->single = 1;
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// Only one answer is allowed
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$htmltext = $this->unxmlise($qrec['#']['text'][0]['#']);
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$question->questiontext = $htmltext;
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$question->name = shorten_text( $question->questiontext, 250 );
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switch ($question->qtype) {
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case MULTICHOICE:
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$question = $this->parse_mc($qrec['#'], $question);
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break;
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case MATCH:
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$groupname = trim($qrec['@']['group']);
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$question = $this->parse_ma($qrec['#'], $groupname);
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break;
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case TRUEFALSE:
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$question = $this->parse_tf_yn($qrec['#'], $question);
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break;
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case SHORTANSWER:
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$question = $this->parse_co($qrec['#'], $question);
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break;
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case ESSAY:
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$question = $this->parse_sa($qrec['#'], $question);
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break;
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case NUMERICAL:
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$question = $this->parse_nr($qrec['#'], $question);
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break;
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break;
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default:
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print("<p>Question type ".$type." import not supported for ".$question->questiontext."<p>");
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$question = NULL;
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}
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// end switch ($question->qtype)
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return $question;
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}
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// end readquestion
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function parse_tf_yn($qrec, $question)
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{
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$choices = array('T' => 1, 'Y' => 1, 'F' => 0, 'N' => 0 );
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$answer = trim($qrec['answer'][0]['#']);
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$question->answer = $choices[$answer];
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$question->correctanswer = $question->answer;
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if ($question->answer == 1) {
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$question->feedbacktrue = 'Correct';
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$question->feedbackfalse = 'Incorrect';
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} else {
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$question->feedbacktrue = 'Incorrect';
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$question->feedbackfalse = 'Correct';
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}
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return $question;
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}
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function parse_mc($qrec, $question)
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{
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$answer = 'choice-'.strtolower(trim($qrec['answer'][0]['#']));
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$choices = $qrec['choices'][0]['#'];
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foreach($choices as $key => $value) {
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if (strpos(trim($key),'choice-') !== FALSE) {
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$question->answer[$key] = s($this->unxmlise($value[0]['#']));
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if (strcmp($key, $answer) == 0) {
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$question->fraction[$key] = 1;
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$question->feedback[$key] = 'Correct';
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} else {
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$question->fraction[$key] = 0;
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$question->feedback[$key] = 'Incorrect';
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}
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}
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}
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return $question;
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}
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function parse_co($qrec, $question)
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{
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$question->usecase = 0;
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$answer = trim($this->unxmlise($qrec['answer'][0]['#']));
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$answer = strip_tags( $answer );
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$answers = explode("\n",$answer);
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foreach($answers as $key => $value) {
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$value = trim($value);
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if (strlen($value) > 0) {
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$question->answer[$key] = $value;
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$question->fraction[$key] = 1;
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$question->feedback[$key] = "Correct";
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}
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}
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return $question;
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}
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function parse_sa($qrec, $question) {
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$feedback = trim($this->unxmlise($qrec['answer'][0]['#']));
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$question->feedback = $feedback;
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$question->fraction = 0;
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return $question;
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}
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function parse_nr($qrec, $question)
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{
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$answer = trim($this->unxmlise($qrec['answer'][0]['#']));
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$answer = strip_tags( $answer );
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$answers = explode("\n",$answer);
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foreach($answers as $key => $value) {
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$value = trim($value);
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if (is_numeric($value)) {
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$errormargin = 0;
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$question->answer[$key] = $value;
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$question->fraction[$key] = 1;
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$question->feedback[$key] = "Correct";
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$question->min[$key] = $question->answer[$key] - $errormargin;
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$question->max[$key] = $question->answer[$key] + $errormargin;
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}
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}
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return $question;
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}
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}
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// end class
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