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493 lines
20 KiB
493 lines
20 KiB
2 years ago
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<?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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* Blackboard V5 and V6 question importer.
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*
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* @package qformat_blackboard_six
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* @copyright 2003 Scott Elliott
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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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* Blackboard pool question importer class.
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*
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* @package qformat_blackboard_six
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* @copyright 2003 Scott Elliott
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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_blackboard_six_pool extends qformat_blackboard_six_base {
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/**
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* @var bool Is the current question's question text escaped HTML
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* (true for most if not all Blackboard files).
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*/
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public $ishtml = true;
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/**
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* Parse the xml document into an array of questions
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*
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* This *could* burn memory - but it won't happen that much
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* so fingers crossed!
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*
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* @param array $text array of lines from the input file.
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* @return array (of objects) questions objects.
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*/
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protected function readquestions($text) {
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// This converts xml to big nasty data structure,
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// the 0 means keep white space as it is.
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try {
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$xml = xmlize($text, 0, 'UTF-8', true);
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} catch (xml_format_exception $e) {
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$this->error($e->getMessage(), '');
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return false;
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}
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$questions = array();
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$this->process_category($xml, $questions);
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$this->process_tf($xml, $questions);
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$this->process_mc($xml, $questions);
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$this->process_ma($xml, $questions);
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$this->process_fib($xml, $questions);
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$this->process_matching($xml, $questions);
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$this->process_essay($xml, $questions);
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return $questions;
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}
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/**
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* Do question import processing common to every qtype.
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*
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* @param array $questiondata the xml tree related to the current question
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* @return object initialized question object.
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*/
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public function process_common($questiondata) {
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// This routine initialises the question object.
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$question = $this->defaultquestion();
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// Determine if the question is already escaped html.
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$this->ishtml = $this->getpath($questiondata,
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array('#', 'BODY', 0, '#', 'FLAGS', 0, '#', 'ISHTML', 0, '@', 'value'),
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false, false);
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// Put questiontext in question object.
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$text = $this->getpath($questiondata,
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array('#', 'BODY', 0, '#', 'TEXT', 0, '#'),
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'', true, get_string('importnotext', 'qformat_blackboard_six'));
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$questiontext = $this->cleaned_text_field($text);
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$question->questiontext = $questiontext['text'];
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$question->questiontextformat = $questiontext['format']; // Needed because add_blank_combined_feedback uses it.
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if (isset($questiontext['itemid'])) {
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$question->questiontextitemid = $questiontext['itemid'];
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}
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// Put name in question object. We must ensure it is not empty and it is less than 250 chars.
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$id = $this->getpath($questiondata, array('@', 'id'), '', true);
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$question->name = $this->create_default_question_name($question->questiontext,
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get_string('defaultname', 'qformat_blackboard_six' , $id));
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$question->generalfeedback = '';
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$question->generalfeedbackformat = FORMAT_HTML;
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$question->generalfeedbackfiles = array();
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// TODO : read the mark from the POOL TITLE QUESTIONLIST section.
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$question->defaultmark = 1;
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return $question;
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}
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/**
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* Add a category question entry based on the pool file title
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* @param array $xml the xml tree
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* @param array $questions the questions already parsed
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*/
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public function process_category($xml, &$questions) {
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$title = $this->getpath($xml, array('POOL', '#', 'TITLE', 0, '@', 'value'), '', true);
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$dummyquestion = new stdClass();
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$dummyquestion->qtype = 'category';
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$dummyquestion->category = $this->cleaninput($this->clean_question_name($title));
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$questions[] = $dummyquestion;
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}
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/**
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* Process Essay Questions
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* @param array $xml the xml tree
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* @param array $questions the questions already parsed
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*/
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public function process_essay($xml, &$questions) {
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if ($this->getpath($xml, array('POOL', '#', 'QUESTION_ESSAY'), false, false)) {
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$essayquestions = $this->getpath($xml,
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array('POOL', '#', 'QUESTION_ESSAY'), false, false);
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} else {
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return;
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}
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foreach ($essayquestions as $thisquestion) {
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$question = $this->process_common($thisquestion);
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$question->qtype = 'essay';
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$question->answer = '';
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$answer = $this->getpath($thisquestion,
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array('#', 'ANSWER', 0, '#', 'TEXT', 0, '#'), '', true);
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$question->graderinfo = $this->cleaned_text_field($answer);
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$question->responsetemplate = $this->text_field('');
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$question->feedback = '';
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$question->responseformat = 'editor';
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$question->responserequired = 1;
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$question->responsefieldlines = 15;
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$question->attachments = 0;
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$question->attachmentsrequired = 0;
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$question->fraction = 0;
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$questions[] = $question;
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}
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}
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/**
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* Process True / False Questions
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* @param array $xml the xml tree
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* @param array $questions the questions already parsed
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*/
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public function process_tf($xml, &$questions) {
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if ($this->getpath($xml, array('POOL', '#', 'QUESTION_TRUEFALSE'), false, false)) {
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$tfquestions = $this->getpath($xml,
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array('POOL', '#', 'QUESTION_TRUEFALSE'), false, false);
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} else {
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return;
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}
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foreach ($tfquestions as $thisquestion) {
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$question = $this->process_common($thisquestion);
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$question->qtype = 'truefalse';
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$question->single = 1; // Only one answer is allowed.
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$choices = $this->getpath($thisquestion, array('#', 'ANSWER'), array(), false);
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$correctanswer = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'CORRECTANSWER', 0, '@', 'answer_id'),
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'', true);
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// First choice is true, second is false.
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$id = $this->getpath($choices[0], array('@', 'id'), '', true);
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$correctfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_CORRECT', 0, '#'),
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'', true);
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$incorrectfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_INCORRECT', 0, '#'),
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'', true);
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if (strcmp($id, $correctanswer) == 0) { // True is correct.
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$question->answer = 1;
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$question->feedbacktrue = $this->cleaned_text_field($correctfeedback);
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$question->feedbackfalse = $this->cleaned_text_field($incorrectfeedback);
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} else { // False is correct.
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$question->answer = 0;
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$question->feedbacktrue = $this->cleaned_text_field($incorrectfeedback);
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$question->feedbackfalse = $this->cleaned_text_field($correctfeedback);
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}
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$question->correctanswer = $question->answer;
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$questions[] = $question;
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}
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}
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/**
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* Process Multiple Choice Questions with single answer
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* @param array $xml the xml tree
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* @param array $questions the questions already parsed
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*/
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public function process_mc($xml, &$questions) {
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if ($this->getpath($xml, array('POOL', '#', 'QUESTION_MULTIPLECHOICE'), false, false)) {
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$mcquestions = $this->getpath($xml,
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array('POOL', '#', 'QUESTION_MULTIPLECHOICE'), false, false);
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} else {
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return;
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}
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foreach ($mcquestions as $thisquestion) {
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$question = $this->process_common($thisquestion);
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$correctfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_CORRECT', 0, '#'),
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'', true);
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$incorrectfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_INCORRECT', 0, '#'),
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'', true);
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$question->correctfeedback = $this->cleaned_text_field($correctfeedback);
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$question->partiallycorrectfeedback = $this->text_field('');
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$question->incorrectfeedback = $this->cleaned_text_field($incorrectfeedback);
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$question->qtype = 'multichoice';
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$question->single = 1; // Only one answer is allowed.
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$choices = $this->getpath($thisquestion, array('#', 'ANSWER'), false, false);
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$correctanswerid = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'CORRECTANSWER', 0, '@', 'answer_id'),
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'', true);
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foreach ($choices as $choice) {
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$choicetext = $this->getpath($choice, array('#', 'TEXT', 0, '#'), '', true);
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// Put this choice in the question object.
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$question->answer[] = $this->cleaned_text_field($choicetext);
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$choiceid = $this->getpath($choice, array('@', 'id'), '', true);
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// If choice is the right answer, give 100% mark, otherwise give 0%.
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if (strcmp ($choiceid, $correctanswerid) == 0) {
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$question->fraction[] = 1;
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} else {
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$question->fraction[] = 0;
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}
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// There is never feedback specific to each choice.
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$question->feedback[] = $this->text_field('');
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}
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$questions[] = $question;
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}
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}
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/**
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* Process Multiple Choice Questions With Multiple Answers
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* @param array $xml the xml tree
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* @param array $questions the questions already parsed
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*/
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public function process_ma($xml, &$questions) {
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if ($this->getpath($xml, array('POOL', '#', 'QUESTION_MULTIPLEANSWER'), false, false)) {
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$maquestions = $this->getpath($xml,
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array('POOL', '#', 'QUESTION_MULTIPLEANSWER'), false, false);
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} else {
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return;
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}
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foreach ($maquestions as $thisquestion) {
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$question = $this->process_common($thisquestion);
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$correctfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_CORRECT', 0, '#'),
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'', true);
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$incorrectfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_INCORRECT', 0, '#'),
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'', true);
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$question->correctfeedback = $this->cleaned_text_field($correctfeedback);
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// As there is no partially correct feedback we use incorrect one.
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$question->partiallycorrectfeedback = $this->cleaned_text_field($incorrectfeedback);
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$question->incorrectfeedback = $this->cleaned_text_field($incorrectfeedback);
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$question->qtype = 'multichoice';
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$question->defaultmark = 1;
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$question->single = 0; // More than one answers allowed.
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$choices = $this->getpath($thisquestion, array('#', 'ANSWER'), false, false);
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$correctanswerids = array();
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foreach ($this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'CORRECTANSWER'), false, false) as $correctanswer) {
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if ($correctanswer) {
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$correctanswerids[] = $this->getpath($correctanswer,
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array('@', 'answer_id'),
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'', true);
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}
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}
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$fraction = 1 / count($correctanswerids);
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foreach ($choices as $choice) {
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$choicetext = $this->getpath($choice, array('#', 'TEXT', 0, '#'), '', true);
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// Put this choice in the question object.
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$question->answer[] = $this->cleaned_text_field($choicetext);
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$choiceid = $this->getpath($choice, array('@', 'id'), '', true);
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$iscorrect = in_array($choiceid, $correctanswerids);
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if ($iscorrect) {
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$question->fraction[] = $fraction;
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} else {
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$question->fraction[] = 0;
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}
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// There is never feedback specific to each choice.
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$question->feedback[] = $this->text_field('');
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}
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$questions[] = $question;
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}
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}
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/**
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* Process Fill in the Blank Questions
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* @param array $xml the xml tree
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* @param array $questions the questions already parsed
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*/
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public function process_fib($xml, &$questions) {
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if ($this->getpath($xml, array('POOL', '#', 'QUESTION_FILLINBLANK'), false, false)) {
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$fibquestions = $this->getpath($xml,
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array('POOL', '#', 'QUESTION_FILLINBLANK'), false, false);
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} else {
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return;
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}
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foreach ($fibquestions as $thisquestion) {
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$question = $this->process_common($thisquestion);
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$question->qtype = 'shortanswer';
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$question->usecase = 0; // Ignore case.
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$correctfeedback = $this->getpath($thisquestion,
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array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_CORRECT', 0, '#'),
|
||
|
|
'', true);
|
||
|
|
$incorrectfeedback = $this->getpath($thisquestion,
|
||
|
|
array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_INCORRECT', 0, '#'),
|
||
|
|
'', true);
|
||
|
|
$answers = $this->getpath($thisquestion, array('#', 'ANSWER'), false, false);
|
||
|
|
foreach ($answers as $answer) {
|
||
|
|
$question->answer[] = $this->getpath($answer,
|
||
|
|
array('#', 'TEXT', 0, '#'), '', true);
|
||
|
|
$question->fraction[] = 1;
|
||
|
|
$question->feedback[] = $this->cleaned_text_field($correctfeedback);
|
||
|
|
}
|
||
|
|
$question->answer[] = '*';
|
||
|
|
$question->fraction[] = 0;
|
||
|
|
$question->feedback[] = $this->cleaned_text_field($incorrectfeedback);
|
||
|
|
|
||
|
|
$questions[] = $question;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Process Matching Questions
|
||
|
|
* @param array $xml the xml tree
|
||
|
|
* @param array $questions the questions already parsed
|
||
|
|
*/
|
||
|
|
public function process_matching($xml, &$questions) {
|
||
|
|
if ($this->getpath($xml, array('POOL', '#', 'QUESTION_MATCH'), false, false)) {
|
||
|
|
$matchquestions = $this->getpath($xml,
|
||
|
|
array('POOL', '#', 'QUESTION_MATCH'), false, false);
|
||
|
|
} else {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// Blackboard questions can't be imported in core Moodle without a loss in data,
|
||
|
|
// as core match question don't allow HTML in subanswers. The contributed ddmatch
|
||
|
|
// question type support HTML in subanswers.
|
||
|
|
// The ddmatch question type is not part of core, so we need to check if it is defined.
|
||
|
|
$ddmatchisinstalled = question_bank::is_qtype_installed('ddmatch');
|
||
|
|
|
||
|
|
foreach ($matchquestions as $thisquestion) {
|
||
|
|
|
||
|
|
$question = $this->process_common($thisquestion);
|
||
|
|
if ($ddmatchisinstalled) {
|
||
|
|
$question->qtype = 'ddmatch';
|
||
|
|
} else {
|
||
|
|
$question->qtype = 'match';
|
||
|
|
}
|
||
|
|
|
||
|
|
$correctfeedback = $this->getpath($thisquestion,
|
||
|
|
array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_CORRECT', 0, '#'),
|
||
|
|
'', true);
|
||
|
|
$incorrectfeedback = $this->getpath($thisquestion,
|
||
|
|
array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_INCORRECT', 0, '#'),
|
||
|
|
'', true);
|
||
|
|
$question->correctfeedback = $this->cleaned_text_field($correctfeedback);
|
||
|
|
// As there is no partially correct feedback we use incorrect one.
|
||
|
|
$question->partiallycorrectfeedback = $this->cleaned_text_field($incorrectfeedback);
|
||
|
|
$question->incorrectfeedback = $this->cleaned_text_field($incorrectfeedback);
|
||
|
|
|
||
|
|
$choices = $this->getpath($thisquestion,
|
||
|
|
array('#', 'CHOICE'), false, false); // Blackboard "choices" are Moodle subanswers.
|
||
|
|
$answers = $this->getpath($thisquestion,
|
||
|
|
array('#', 'ANSWER'), false, false); // Blackboard "answers" are Moodle subquestions.
|
||
|
|
$correctanswers = $this->getpath($thisquestion,
|
||
|
|
array('#', 'GRADABLE', 0, '#', 'CORRECTANSWER'), false, false); // Mapping between choices and answers.
|
||
|
|
$mappings = array();
|
||
|
|
foreach ($correctanswers as $correctanswer) {
|
||
|
|
if ($correctanswer) {
|
||
|
|
$correctchoiceid = $this->getpath($correctanswer,
|
||
|
|
array('@', 'choice_id'), '', true);
|
||
|
|
$correctanswerid = $this->getpath($correctanswer,
|
||
|
|
array('@', 'answer_id'),
|
||
|
|
'', true);
|
||
|
|
$mappings[$correctanswerid] = $correctchoiceid;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($choices as $choice) {
|
||
|
|
if ($ddmatchisinstalled) {
|
||
|
|
$choicetext = $this->cleaned_text_field($this->getpath($choice,
|
||
|
|
array('#', 'TEXT', 0, '#'), '', true));
|
||
|
|
} else {
|
||
|
|
$choicetext = trim(strip_tags($this->getpath($choice,
|
||
|
|
array('#', 'TEXT', 0, '#'), '', true)));
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($choicetext != '') { // Only import non empty subanswers.
|
||
|
|
$subquestion = '';
|
||
|
|
$choiceid = $this->getpath($choice,
|
||
|
|
array('@', 'id'), '', true);
|
||
|
|
$fiber = array_search($choiceid, $mappings);
|
||
|
|
$fiber = array_keys ($mappings, $choiceid);
|
||
|
|
foreach ($fiber as $correctanswerid) {
|
||
|
|
// We have found a correspondance for this choice so we need to take the associated answer.
|
||
|
|
foreach ($answers as $answer) {
|
||
|
|
$currentanswerid = $this->getpath($answer,
|
||
|
|
array('@', 'id'), '', true);
|
||
|
|
if (strcmp ($currentanswerid, $correctanswerid) == 0) {
|
||
|
|
$subquestion = $this->getpath($answer,
|
||
|
|
array('#', 'TEXT', 0, '#'), '', true);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$question->subquestions[] = $this->cleaned_text_field($subquestion);
|
||
|
|
$question->subanswers[] = $choicetext;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($subquestion == '') { // Then in this case, $choice is a distractor.
|
||
|
|
$question->subquestions[] = $this->text_field('');
|
||
|
|
$question->subanswers[] = $choicetext;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Verify that this matching question has enough subquestions and subanswers.
|
||
|
|
$subquestioncount = 0;
|
||
|
|
$subanswercount = 0;
|
||
|
|
$subanswers = $question->subanswers;
|
||
|
|
foreach ($question->subquestions as $key => $subquestion) {
|
||
|
|
$subquestion = $subquestion['text'];
|
||
|
|
$subanswer = $subanswers[$key];
|
||
|
|
if ($subquestion != '') {
|
||
|
|
$subquestioncount++;
|
||
|
|
}
|
||
|
|
$subanswercount++;
|
||
|
|
}
|
||
|
|
if ($subquestioncount < 2 || $subanswercount < 3) {
|
||
|
|
$this->error(get_string('notenoughtsubans', 'qformat_blackboard_six', $question->questiontext));
|
||
|
|
} else {
|
||
|
|
$questions[] = $question;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|