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question.php
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question.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/>.
/**
* Transcription question definition class.
*
* @package qtype
* @subpackage transcription
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Represents a short answer question.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qtype_transcription_question extends question_graded_by_strategy
implements question_response_answer_comparer {
/** @var boolean whether answers should be graded case-sensitively. */
public $usecase;
/** @var array of question_answer. */
public $answers = array();
public function __construct() {
global $PAGE;
$path = '/question/type/transcription';
//$PAGE->requires->js($path.'/js/IPA_buttons.js', true);
$PAGE->requires->jquery();
//$PAGE->requires->js($path.'/js/IPA_buttons_upgrade.js', true);
$PAGE->requires->js($path.'/js/inline.js', true);
parent::__construct(new question_first_matching_answer_grading_strategy($this));
}
public function get_expected_data() {
return array('answer' => PARAM_RAW_TRIMMED);
}
public function summarise_response(array $response) {
if (isset($response['answer'])) {
return $response['answer'];
} else {
return null;
}
}
public function is_complete_response(array $response) {
return array_key_exists('answer', $response) &&
($response['answer'] || $response['answer'] === '0');
}
public function get_validation_error(array $response) {
if ($this->is_gradable_response($response)) {
return '';
}
return get_string('pleaseenterananswer', 'qtype_transcription');
}
public function is_same_response(array $prevresponse, array $newresponse) {
return question_utils::arrays_same_at_key_missing_is_blank(
$prevresponse, $newresponse, 'answer');
}
public function get_answers() {
return $this->answers;
}
public function compare_response_with_answer(array $response, question_answer $answer) {
return self::compare_string_with_wildcard(
$response['answer'], $answer->answer, !$this->usecase);
}
public static function compare_string_with_wildcard($string, $pattern, $ignorecase) {
// Break the string on non-escaped asterisks.
$bits = preg_split('/(?<!\\\\)\*/', $pattern);
// Escape regexp special characters in the bits.
$excapedbits = array();
foreach ($bits as $bit) {
$excapedbits[] = preg_quote(str_replace('\*', '*', $bit));
}
// Put it back together to make the regexp.
$regexp = '|^' . implode('.*', $excapedbits) . '$|u';
// Make the match insensitive if requested to.
if ($ignorecase) {
$regexp .= 'i';
}
return preg_match($regexp, trim($string));
}
public function get_correct_response() {
$response = parent::get_correct_response();
if ($response) {
$response['answer'] = $this->clean_response($response['answer']);
}
return $response;
}
public function clean_response($answer) {
// Break the string on non-escaped asterisks.
$bits = preg_split('/(?<!\\\\)\*/', $answer);
// Unescape *s in the bits.
$cleanbits = array();
foreach ($bits as $bit) {
$cleanbits[] = str_replace('\*', '*', $bit);
}
// Put it back together with spaces to look nice.
return trim(implode(' ', $cleanbits));
}
public function check_file_access($qa, $options, $component, $filearea,
$args, $forcedownload) {
if ($component == 'question' && $filearea == 'answerfeedback') {
$currentanswer = $qa->get_last_qt_var('answer');
$answer = $qa->get_question()->get_matching_answer(array('answer' => $currentanswer));
$answerid = reset($args); // itemid is answer id.
return $options->feedback && $answerid == $answer->id;
} else if ($component == 'question' && $filearea == 'hint') {
return $this->check_hint_file_access($qa, $options, $args);
} else {
return parent::check_file_access($qa, $options, $component, $filearea,
$args, $forcedownload);
}
}
}