forked from jmvedrine/moodle-qformat_canvas
/
format.php
1103 lines (1018 loc) · 46.1 KB
/
format.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Canvas IMSQTI XML question importer.
*
* @package qformat_canvas
* @copyright 2014 Jean-Michel Vedrine
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir . '/xmlize.php');
if (!class_exists('qformat_default')) {
// This is ugly, but this class is also (ab)used by mod/lesson, which defines
// a different base class in mod/lesson/format.php. Thefore, we can only
// include the proper base class conditionally like this. (We have to include
// the base class like this, otherwise it breaks third-party question types.)
// This may be reviewd, and a better fix found one day.
require_once($CFG->dirroot . '/question/format.php');
}
class qformat_canvas extends qformat_based_on_xml {
public function provide_import() {
return true;
}
public function mime_type() {
return 'application/xml';
}
/**
* For now this is just a wrapper for cleaninput.
* @param string text text to parse and recode
* @return array with keys text, format, itemid.
*/
public function cleaned_text_field($text) {
return array('text' => $this->cleaninput($text), 'format' => FORMAT_HTML);
}
/**
* Parse the xml document into an array of questions
* this *could* burn memory - but it won't happen that much
* so fingers crossed!
* @param $lines array of lines from the input file.
* @return array (of objects) questions objects.
*/
public function readquestions($lines) {
question_bank::get_qtype('multianswer'); // Ensure the multianswer code is loaded.
$text = implode(' ', $lines);
unset($lines);
// This converts xml to big nasty data structure,
// the 0 means keep white space as it is.
try {
$xml = xmlize($text, 0, 'UTF-8', true);
} catch (xml_format_exception $e) {
$this->error($e->getMessage(), '');
return false;
}
$questions = array();
// First step : we are only interested in the <item> tags.
$questionsdata = $this->getpath($xml,
array('questestinterop', '#', 'assessment', 0, '#', 'section', 0, '#', 'item'),
array(), false);
// Each <item> tag contains data related to a single question.
foreach ($questionsdata as $questiondata) {
// Second step : parse each question data into the intermediate
// rawquestion structure array.
// Warning : rawquestions are not Moodle questions.
$rawquestion = $this->create_raw_question($questiondata);
// Third step : convert a rawquestion into a Moodle question.
switch($rawquestion->qtype) {
case 'multiple_choice_question':
$this->process_mc($rawquestion, $questions);
break;
case 'multiple_answers_question':
$this->process_ma($rawquestion, $questions);
break;
case 'true_false_question':
$this->process_tf($rawquestion, $questions);
break;
case 'short_answer_question':
$this->process_sa($rawquestion, $questions);
break;
case 'essay_question':
case 'file_upload_question':
$this->process_essay($rawquestion, $questions);
break;
case 'matching_question':
$this->process_matching($rawquestion, $questions);
break;
case 'multiple_dropdowns_question':
case 'fill_in_multiple_blanks_question':
$this->process_multiple($rawquestion, $questions, $rawquestion->qtype);
break;
case 'numerical_question':
$this->process_num($rawquestion, $questions);
break;
case 'text_only_question':
$this->process_description($rawquestion, $questions);
break;
case 'calculated_question':
$this->process_calculated($rawquestion, $questions);
default:
$this->error(get_string('unknownorunhandledtype', 'question', $rawquestion->qtype));
break;
}
}
return $questions;
}
/**
* Creates a cleaner object to deal with for processing into Moodle.
* The object returned is NOT a moodle question object.
* @param array $quest XML <item> question data
* @return object rawquestion
*/
public function create_raw_question($quest) {
$rawquestion = new stdClass();
$meta = $this->getpath($quest,
array('#', 'itemmetadata', 0, '#', 'qtimetadata', 0, '#', 'qtimetadatafield'),
false, false);
$rawquestion->qtype = $this->find_metadata($meta, 'question_type');
$rawquestion->defaultmark = $this->find_metadata($meta, 'points_possible', 1);
$rawquestion->title = $this->cleaninput($this->getpath($quest,
array('@', 'title'),
'', true));
$rawquestion->id = $this->getpath($quest,
array('@', 'ident'),
'', true);
$presentation = new stdClass();
$presentation->blocks = $this->getpath($quest,
array('#', 'presentation'),
array(), false);
foreach ($presentation->blocks as $pblock) {
$block = new stdClass();
$this->process_block($pblock, $block);
$rawquestion->question = $block;
switch($rawquestion->qtype) {
case 'multiple_choice_question':
case 'multiple_answers_question':
case 'true_false_question':
$rawchoices = $this->getpath($pblock,
array('#', 'response_lid', 0, '#', 'render_choice', 0, '#', 'response_label'),
array(), false);
$choices = array();
$this->process_choices($rawchoices, $choices);
$rawquestion->choices = $choices;
break;
case 'fill_in_multiple_blanks_question':
case 'multiple_dropdowns_question':
$parts = $this->getpath($pblock,
array('#', 'response_lid'),
array(), false);
$rawparts = array();
foreach ($parts as $part) {
$block = new stdClass();
$this->process_block($part, $block);
$rawchoices = $this->getpath($part,
array( '#', 'render_choice', 0, '#', 'response_label'),
array(), false);
$choices = array();
$this->process_choices($rawchoices, $choices);
$rawparts[$block->text] = $choices;
}
$rawquestion->choices = $rawparts;
break;
case 'matching_question':
$rawsubquestions = $this->getpath($pblock,
array('#', 'response_lid'),
array(), false);
$this->process_subquestions($rawsubquestions, $subquestions);
$rawquestion->subquestions = $subquestions;
break;
case 'short_answer_question':
// TODO process response_str tag if necessary.
break;
case 'numerical_question':
break;
case 'file_upload_question':
case 'essay_question':
case 'text_only_question':
default:
// Nothing to do here.
break;
}
}
if ($rawquestion->qtype != 'text_only_question'
&& $rawquestion->qtype != 'essay_question'
&& $rawquestion->qtype != 'file_upload_question') {
// Determine response processing.
$resprocessing = $this->getpath($quest,
array('#', 'resprocessing'),
array(), false);
$respconditions = $this->getpath($resprocessing[0],
array('#', 'respcondition'),
array(), false);
$rawquestion->maxmark = (float)$this->getpath($resprocessing[0],
array('#', 'outcomes', 0, '#', 'decvar', 0, '@', 'maxvalue'),
array(), false);
$rawquestion->minmark = (float)$this->getpath($resprocessing[0],
array('#', 'outcomes', 0, '#', 'decvar', 0, '@', 'minvalue'),
array(), false);
$rawquestion->varname = (float)$this->getpath($resprocessing[0],
array('#', 'outcomes', 0, '#', 'decvar', 0, '@', 'varname'),
array(), false);
$responses = array();
if ($rawquestion->qtype == 'matching_question') {
$this->process_matching_responses($respconditions, $responses);
} else if ($rawquestion->qtype == 'numerical_question') {
$this->process_num_responses($respconditions, $responses);
} else {
$this->process_responses($respconditions, $responses);
}
$rawquestion->responses = $responses;
}
$feedbackset = $this->getpath($quest,
array('#', 'itemfeedback'),
array(), false);
$feedbacks = array();
$this->process_feedback($feedbackset, $feedbacks);
$rawquestion->feedback = $feedbacks;
return $rawquestion;
}
/**
* Helper function to process an XML block into an object.
* Can call himself recursively if necessary to parse this branch of the XML tree.
* @param array $curblock XML block to parse
* @return object $block parsed
*/
public function process_block($curblock, $block) {
// Foe now all blocks are of type Block.
$curtype = 'Block';
switch($curtype) {
case 'Block':
if ($this->getpath($curblock,
array('#', 'material', 0, '#', 'mattext'),
false, false)) {
$block->text = $this->getpath($curblock,
array('#', 'material', 0, '#', 'mattext', 0, '#'),
'', true);
} else if ($this->getpath($curblock,
array('#', 'material', 0, '#', 'mat_extension', 0, '#', 'mat_formattedtext'),
false, false)) {
$block->text = $this->getpath($curblock,
array('#', 'material', 0, '#', 'mat_extension', 0, '#', 'mat_formattedtext', 0, '#'),
'', true);
} else if ($this->getpath($curblock,
array('#', 'response_label'),
false, false)) {
// This is a response label block.
$subblocks = $this->getpath($curblock,
array('#', 'response_label', 0),
array(), false);
if (!isset($block->ident)) {
if ($this->getpath($subblocks,
array('@', 'ident'), '', true)) {
$block->ident = $this->getpath($subblocks,
array('@', 'ident'), '', true);
}
}
foreach ($this->getpath($subblocks,
array('#', 'flow_mat'), array(), false) as $subblock) {
$this->process_block($subblock, $block);
}
} else {
if ($this->getpath($curblock,
array('#', 'flow_mat'), false, false)
|| $this->getpath($curblock,
array('#', 'flow'), false, false)) {
if ($this->getpath($curblock,
array('#', 'flow_mat'), false, false)) {
$subblocks = $this->getpath($curblock,
array('#', 'flow_mat'), array(), false);
} else if ($this->getpath($curblock,
array('#', 'flow'), false, false)) {
$subblocks = $this->getpath($curblock,
array('#', 'flow'), array(), false);
}
foreach ($subblocks as $sblock) {
// This will recursively grab the sub blocks which should be of one of the other types.
$this->process_block($sblock, $block);
}
}
}
break;
}
return $block;
}
protected function find_metadata($data, $label, $default = '') {
$metadatas = $this->getpath($data,
array('#', 'itemmetadata', 0, '#', 'qtimetadata', 0, '#', 'qtimetadatafield'),
false, false);
foreach ($data as $metadata) {
if ($this->getpath($metadata,
array('#', 'fieldlabel', 0, '#'),
false, false) == $label) {
return $this->getpath($metadata,
array('#', 'fieldentry', 0, '#'),
'', true);
}
}
return $default;
}
/**
* Preprocess XML blocks containing data for questions' choices.
* Called by {@link create_raw_question()}
* for matching, multichoice and fill in the blank questions.
* @param array $bbchoices XML block to parse
* @param array $choices array of choices suitable for a rawquestion.
*/
protected function process_choices($bbchoices, &$choices) {
foreach ($bbchoices as $choice) {
$curchoice = new stdClass();
if ($this->getpath($choice,
array('@', 'ident'), '', true)) {
$curchoice->ident = $this->getpath($choice,
array('@', 'ident'), '', true);
} else { // For multiple answers.
$curchoice->ident = $this->getpath($choice,
array('#', 'response_label', 0), array(), false);
}
if ($this->getpath($choice,
array('#', 'flow_mat', 0), false, false)) {
$curblock = $this->getpath($choice,
array('#', 'flow_mat', 0), false, false);
$this->process_block($curblock, $curchoice);
} else {
$this->process_block($choice, $curchoice);
}
$choices[$curchoice->ident] = $curchoice;
}
}
/**
* Preprocess XML blocks containing data for matching questions subquestions.
* Called by {@link create_raw_question()}
* for matching questions.
* @param array $awsubqestions XML block to parse
* @param array $subquestions array of subquestions suitable for a matching rawquestion.
*/
protected function process_subquestions($rawsubqestions, &$subqestions) {
foreach ($rawsubqestions as $rawsubq) {
$cursubq = new stdClass();
if ($this->getpath($rawsubq,
array('@', 'ident'), '', true)) {
$cursubq->ident = $this->getpath($rawsubq,
array('@', 'ident'), '', true);
}
$this->process_block($rawsubq, $cursubq);
$rawchoices = $this->getpath($rawsubq,
array('#', 'render_choice', 0, '#', 'response_label'), array(), false);
$choices = array();
$this->process_choices($rawchoices, $choices);
$cursubq->choices = $choices;
$subqestions[] = $cursubq;
}
}
/**
* Preprocess XML blocks containing data for subanswers
* Called by {@link create_raw_question()}
* for matching questions only.
* @param array $bbresponses XML block to parse
* @param array $responses array of responses suitable for a matching rawquestion.
*/
protected function process_matching_responses($bbresponses, &$responses) {
foreach ($bbresponses as $bbresponse) {
$response = new stdClass;
if ($this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'varequal'), false, false)) {
$response->correct = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'varequal', 0, '#'), '', true);
$response->ident = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'varequal', 0, '@', 'respident'), '', true);
}
$responses[] = $response;
}
}
/**
* Preprocess XML blocks containing data for responses processing.
* Called by {@link create_raw_question()}
* for all questions types except matching and numerical.
* @param array $bbresponses XML block to parse
* @param array $responses array of responses suitable for a rawquestion.
*/
protected function process_responses($bbresponses, &$responses) {
foreach ($bbresponses as $bbresponse) {
$response = new stdClass();
if ($this->getpath($bbresponse,
array('@', 'title'), '', true)) {
$response->title = $this->getpath($bbresponse,
array('@', 'title'), '', true);
} else {
$response->title = $this->getpath($bbresponse,
array('#', 'displayfeedback', 0, '@', 'linkrefid'), '', true);
}
$response->ident = array();
if ($this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'other', 0, '#'), false, false)) {
$response->ident[0] = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'other', 0, '#'), array(), false);
} else if ($this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'and'), false, false)) {
$responseset = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'and', 0, '#'), array(), false);
foreach ($responseset as $rsid => $rs) {
if ($rsid == 'varequal') {
if (is_array($rs)) {
foreach ($rs as $resp) {
$response->ident[] = $this->getpath($resp, array('#'), '', true);
}
}
}
if (!isset($response->respident) and $this->getpath($rs, array('@', 'respident'), false, false)) {
$response->respident = $this->getpath($rs,
array('@', 'respident'), '', true);
}
}
} else {
$responseset = $this->getpath($bbresponse,
array('#', 'conditionvar'), array(), false);
foreach ($responseset as $rs) {
$resp = $this->getpath($rs, array('#', 'varequal'), array(), false);
if (is_array($resp)) {
foreach ($resp as $ans) {
$response->ident[] = $this->getpath($ans, array('#'), '', true);
if ($this->getpath($ans, array('@', 'respident'), false, false)) {
$response->respident[] = $this->getpath($ans,
array('@', 'respident'), '', true);
} else {
$response->respident[] = '';
}
}
} else {
$response->ident[] = $this->getpath($rs, array('#', 'varequal', 0, '#'), '', true);
}
if ($this->getpath($rs, array('#', 'varequal', 0, '@', 'respident'), false, false)) {
$response->respident = $this->getpath($rs,
array('#', 'varequal', 0, '@', 'respident'), '', true);
}
}
}
if ($this->getpath($bbresponse,
array('#', 'displayfeedback', 0, '@', 'linkrefid'), false, false)) {
$response->feedback = $this->getpath($bbresponse,
array('#', 'displayfeedback', 0, '@', 'linkrefid'), '', true);
}
// Determine what mark to give to this response.
if ($this->getpath($bbresponse,
array('#', 'setvar', 0, '#'), false, false)) {
$response->mark = (float)$this->getpath($bbresponse,
array('#', 'setvar', 0, '#'), '', true);
if ($response->mark > 0.0) {
$response->title = 'correct';
} else {
$response->title = 'incorrect';
}
}
$responses[] = $response;
}
}
/**
* Preprocess XML blocks containing data for responses processing.
* Called by {@link create_raw_question()}
* for numerical questions type.
* @param array $bbresponses XML block to parse
* @param array $responses array of responses suitable for a rawquestion.
*/
protected function process_num_responses($bbresponses, &$responses) {
foreach ($bbresponses as $bbresponse) {
$response = new stdClass();
if ($this->getpath($bbresponse,
array('@', 'title'), '', true)) {
$response->title = $this->getpath($bbresponse,
array('@', 'title'), '', true);
} else {
$response->title = $this->getpath($bbresponse,
array('#', 'displayfeedback', 0, '@', 'linkrefid'), '', true);
}
$response->value = array();
$response->minvalue = array();
$response->maxvalue = array();
if ($this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'other', 0, '#'), false, false)) {
$response->ident = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'other', 0, '#'), '', true);
} else if ($this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'or'), false, false)) {
$responseset = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#', 'or', 0, '#'), array(), false);
foreach ($responseset as $rsid => $rs) {
if ($rsid === 'varequal') {
if (is_array($rs)) {
foreach ($rs as $resp) {
$response->value[] = $this->getpath($resp, array('#'), '', true);
}
}
} else if ($rsid === 'and') {
$limits = $this->getpath($rs,
array(0, '#'), array(), false);
foreach ($limits as $limitop => $limit) {
if ($limitop === 'varlte') {
$response->maxvalue[] = $this->getpath($limit, array(0, '#'), '', true);
} else if ($limitop === 'vargte') {
$response->minvalue[] = $this->getpath($limit, array(0, '#'), '', true);
}
}
}
}
} else {
$responseset = $this->getpath($bbresponse,
array('#', 'conditionvar', 0, '#'), array(), false);
foreach ($responseset as $rsid => $rs) {
if ($rsid === 'varlte') {
$response->maxvalue[] = $this->getpath($rs, array(0, '#'), '', true);
} else if ($rsid === 'vargte') {
$response->minvalue[] = $this->getpath($rs, array(0, '#'), '', true);
}
}
}
if ($this->getpath($bbresponse,
array('#', 'displayfeedback', 0, '@', 'linkrefid'), false, false)) {
$response->feedback = $this->getpath($bbresponse,
array('#', 'displayfeedback', 0, '@', 'linkrefid'), '', true);
}
// Determine what mark to give to this response.
if ($this->getpath($bbresponse,
array('#', 'setvar', 0, '#'), false, false)) {
$response->mark = (float)$this->getpath($bbresponse,
array('#', 'setvar', 0, '#'), '', true);
if ($response->mark > 0.0) {
$response->title = 'correct';
} else {
$response->title = 'incorrect';
}
}
$responses[] = $response;
}
}
/**
* Preprocess XML blocks containing data for responses feedbacks.
* Called by {@link create_raw_question()}
* for all questions types.
* @param array $feedbackset XML block to parse
* @param array $feedbacks array of feedbacks suitable for a rawquestion.
*/
public function process_feedback($feedbackset, &$feedbacks) {
foreach ($feedbackset as $bbfeedback) {
$feedback = new stdClass();
$feedback->ident = $this->getpath($bbfeedback,
array('@', 'ident'), '', true);
$feedback->text = '';
if ($this->getpath($bbfeedback,
array('#', 'flow_mat', 0), false, false)) {
$this->process_block($this->getpath($bbfeedback,
array('#', 'flow_mat', 0), false, false), $feedback);
} else if ($this->getpath($bbfeedback,
array('#', 'solution', 0, '#', 'solutionmaterial', 0, '#', 'flow_mat', 0), false, false)) {
$this->process_block($this->getpath($bbfeedback,
array('#', 'solution', 0, '#', 'solutionmaterial', 0, '#', 'flow_mat', 0), false, false), $feedback);
}
$feedbacks[$feedback->ident] = $feedback;
}
}
/**
* Create common parts of question
* @param object $quest rawquestion
* @return object Moodle question.
*/
public function process_common($quest) {
$question = $this->defaultquestion();
$text = $this->cleaninput($quest->question->text);
if ($quest->title) {
$question->name = $this->cleaninput($quest->title);
} else {
$question->name = $this->create_default_question_name($text,
get_string('defaultname', 'qformat_canvas' , $quest->id));
}
$question->questiontext = $text;
$question->questiontextformat = FORMAT_HTML;
$question->generalfeedback = '';
$question->generalfeedbackformat = FORMAT_HTML;
return $question;
}
/** Pocess different feebacks
* @param object $quest rawquestion
* @param object $question current Moodle question
* @param boolean addcombined
*/
protected function process_qfeedbacks($quest, &$question, $addcombined=true) {
$feedback = new stdClass();
foreach ($quest->feedback as $fb) {
$feedback->{$fb->ident} = trim($fb->text);
}
if (isset($feedback->general_fb)) {
$question->generalfeedback = $feedback->general_fb;
}
if ($addcombined) {
if (isset($feedback->correct_fb)) {
$question->correctfeedback['text'] = $feedback->correct_fb;
}
if (isset($feedback->general_incorrect_fb)) {
$question->incorrectfeedback['text'] = $feedback->general_incorrect_fb;
}
}
}
protected function process_answer_feedback($quest, $ident) {
if (isset($quest->feedback[$ident])) {
return $this->cleaned_text_field($quest->feedback[$ident]->text);
} else {
return $this->cleaned_text_field('');
}
}
/**
* Process a multichoice singke answer question
* Parse a multichoice single answer rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param $questions array of Moodle questions already done.
*/
protected function process_mc($quest, &$questions) {
$gradeoptionsfull = question_bank::fraction_options_full();
$question = $this->process_common($quest);
$question->qtype = 'multichoice';
$question = $this->add_blank_combined_feedback($question);
$question->single = 1;
$answers = $quest->responses;
$correctanswers = array();
foreach ($answers as $answer) {
if ($answer->title == 'correct') {
$answerset = $answer->ident;
foreach ($answerset as $ans) {
$correctanswers[$ans] = 1;
}
}
}
$this->process_qfeedbacks($quest, $question, true);
$i = 0;
foreach ($quest->choices as $cid => $choice) {
$question->answer[$i] = $this->cleaned_text_field(trim($choice->text));
if (array_key_exists($choice->ident, $correctanswers)) {
// Correct answer.
$question->fraction[$i] = 1;
} else {
// Wrong answer.
$question->fraction[$i] = 0;
}
$question->feedback[$i] = $this->process_answer_feedback($quest, $choice->ident .'_fb');
$i++;
}
$questions[] = $question;
}
/**
* Process a Multichoice multi question
* Parse a multichoice multiple answer rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param $questions array of Moodle questions already done.
*/
protected function process_ma($quest, &$questions) {
$gradeoptionsfull = question_bank::fraction_options_full();
$question = $this->process_common($quest);
$question->qtype = 'multichoice';
$question = $this->add_blank_combined_feedback($question);
$question->single = 0;
$answers = $quest->responses;
$correctanswers = array();
foreach ($answers as $answer) {
if ($answer->title == 'correct') {
$answerset = $answer->ident;
foreach ($answerset as $ans) {
$correctanswers[$ans] = 1;
}
}
}
$this->process_qfeedbacks($quest, $question, true);
$correctanswersum = array_sum($correctanswers);
$i = 0;
foreach ($quest->choices as $cid => $choice) {
$question->answer[$i] = $this->cleaned_text_field(trim($choice->text));
if (array_key_exists($choice->ident, $correctanswers)) {
// Correct answer.
$question->fraction[$i] =
match_grade_options($gradeoptionsfull, $correctanswers[$choice->ident] / $correctanswersum, 'nearest');
} else {
// Wrong answer.
$question->fraction[$i] = 0;
}
$question->feedback[$i] = $this->process_answer_feedback($quest, $choice->ident .'_fb');
$i++;
}
$questions[] = $question;
}
/**
* Process Short Answer Questions
* Parse a fillintheblank rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param array $questions array of Moodle questions already done.
*/
protected function process_sa($quest, &$questions) {
$question = $this->process_common($quest);
$question->qtype = 'shortanswer';
$question->usecase = 0; // Ignore case.
$this->process_qfeedbacks($quest, $question, false);
$answers = array();
$fractions = array();
$feedbacks = array();
// Find the correct answers.
foreach ($quest->responses as $response) {
if ($response->title == 'correct') {
foreach ($response->ident as $correctresponse) {
if ($correctresponse != '') {
$answers[] = $correctresponse;
$fractions[] = 1;
$feedbacks[] = $this->text_field('');
}
}
}
}
// Set the answer feedbacks.
foreach ($quest->responses as $response) {
if ($response->title != 'correct') {
foreach ($response->ident as $correctresponse) {
if ($correctresponse != '') {
foreach ($answers as $aid => $ans) {
if ($ans === $correctresponse) {
$feedbacks[$aid] = $this->process_answer_feedback($quest, $response->title);
}
}
}
}
}
}
// Adding catchall to so that students can see feedback for incorrect answers when they enter something,
// the instructor did not enter.
$answers[] = '*';
$fractions[] = 0;
if (isset($feedback['incorrect'])) {
$feedbacks[] = $this->cleaned_text_field($feedback['incorrect']);
} else {
$feedbacks[] = $this->text_field('');
}
$question->answer = $answers;
$question->fraction = $fractions;
$question->feedback = $feedbacks;
if (!empty($question)) {
$questions[] = $question;
}
}
/**
* Process Essay Questions
* Parse an essay rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param $questions array of Moodle questions already done.
*/
public function process_essay($quest, &$questions) {
$question = $this->process_common($quest);
$question->qtype = 'essay';
$question->fraction[] = 1;
$question->defaultmark = 1;
if ($quest->qtype == 'file_upload_question') {
$question->attachments = 1;
$question->attachmentsrequired = 1;
$question->responserequired = 0;
$question->responseformat = 'editor';
$question->responsefieldlines = 15;
} else {
$question->attachments = 0;
$question->attachmentsrequired = 0;
$question->responserequired = 1;
$question->responseformat = 'editor';
$question->responsefieldlines = 15;
}
$question->graderinfo = $this->text_field('');
$question->responsetemplate = $this->text_field('');
$questions[] = $question;
}
/**
* Process Matching Questions
* Parse a matching rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param array $questions array of Moodle questions already done.
*/
public function process_matching($quest, &$questions) {
$question = $this->process_common($quest);
$question = $this->add_blank_combined_feedback($question);
$question->qtype = 'match';
$this->process_qfeedbacks($quest, $question, true);
// Construction of the array holding correct choice fo each subquestion.
$correctchoices = array();
// Construction of the array holding all possible choices.
$allchoices = array();
foreach ($quest->subquestions as $subq) {
foreach ($quest->responses as $resp) {
if (isset($resp->ident) && $resp->ident == $subq->ident) {
$correct = $resp->correct;
}
}
$correctchoices[$subq->ident] = $subq->choices[$correct]->text;
foreach ($subq->choices as $choice) {
if (!in_array($choice->text, $allchoices)) {
$allchoices[] = $choice->text;
}
}
}
foreach ($allchoices as $choice) {
if ($choice != '') { // Only import non empty subanswers.
$subanswer = html_to_text($this->cleaninput($choice), 0);
$subquestion = '';
// Fin all subquestions ident having this choice as correct.
$fiber = array_keys ($correctchoices, $choice);
foreach ($fiber as $subqid) {
// We have found a correspondance for this choice so we need to take the associated subquestion.
foreach ($quest->subquestions as $subq) {
if (strcmp ($subq->ident, $subqid) == 0) {
$subquestion = $subq->text;
break;
}
}
$question->subquestions[] = $this->cleaned_text_field($subquestion);
$question->subanswers[] = $subanswer;
}
if ($subquestion == '') { // Then in this case, $choice is a distractor.
$question->subquestions[] = $this->text_field('');
$question->subanswers[] = $subanswer;
}
}
}
// 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_canvas', $question->questiontext));
} else {
$questions[] = $question;
}
}
/**
* Process True / False Questions
* Parse a truefalse rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param array $questions array of Moodle questions already done
*/
protected function process_tf($quest, &$questions) {
$question = $this->process_common($quest);
$question->qtype = 'truefalse';
$question->single = 1; // Only one answer is allowed.
$question->penalty = 1; // Penalty = 1 for truefalse questions.
$this->process_qfeedbacks($quest, $question, false);
$responses = $quest->responses;
foreach ($responses as $response) {
if ($response->title == 'correct') {
$correctresponseid = $response->ident[0];
foreach ($quest->choices as $cid => $choice) {
if ($cid == $correctresponseid) {
$correctresponse = strtolower($choice->text);
} else {
$incorrectresponseid = $cid;
}
}
}
}
if ($correctresponse != 'false' && $correctresponse != 'faux'
&& $correctresponse != strtolower(get_string('false', 'qtype_truefalse'))) {
$correct = true;
} else {
$correct = false;
}
if ($correct) { // True is correct.
$question->answer = 1;
$question->feedbacktrue = $this->process_answer_feedback($quest, $correctresponseid .'_fb');
$question->feedbackfalse = $this->process_answer_feedback($quest, $incorrectresponseid .'_fb');
} else { // False is correct.
$question->answer = 0;
$question->feedbacktrue = $this->process_answer_feedback($quest, $incorrectresponseid .'_fb');
$question->feedbackfalse = $this->process_answer_feedback($quest, $correctresponseid .'_fb');
}
$question->correctanswer = $question->answer;
$questions[] = $question;
}
/**
* Process description Questions
* Parse a description rawquestion and add the result
* to the array of questions already parsed.
* @param object $quest rawquestion
* @param $questions array of Moodle questions already done.
*/
public function process_description($quest, &$questions) {
$question = $this->process_common($quest);
$question->qtype = 'description';
$question->defaultmark = 0;
$question->length = 0;
$questions[] = $question;
}
/**
* Escape all characters used as control chars in cloze questions.
* @param string $string text to escape
* @return escaped text
*/
protected function escape_text($string) {
$controlchars = array('}', '#', '~', '/', '"', '\\');
$escapedchars = array('\\}', '\\#', '\\~', '\\/', '\\"', '\\\\');
$string = str_replace($controlchars, $escapedchars, $string);
return $string;
}
protected function construct_subquestion($placeholder, $choices, $responses, $subqtype) {
$correctanswer = array();
foreach ($responses as $response) {
if ($response->title == 'correct' && $response->respident == 'response_' . $placeholder) {