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moodle/admin/tool/qeupgradehelper/locallib.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/>.
/**
* Question engine upgrade helper library code.
*
* @package tool
* @subpackage qeupgradehelper
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Detect whether this site has been upgraded to the new question engine yet.
* @return bool whether the site has been upgraded.
*/
function tool_qeupgradehelper_is_upgraded() {
global $CFG, $DB;
$dbman = $DB->get_manager();
return is_readable($CFG->dirroot . '/question/engine/upgrade/upgradelib.php') &&
$dbman->table_exists('question_usages');
}
/**
* If the site has not yet been upgraded, display an error.
*/
function tool_qeupgradehelper_require_upgraded() {
if (!tool_qeupgradehelper_is_upgraded()) {
throw new moodle_exception('upgradedsiterequired', 'tool_qeupgradehelper',
tool_qeupgradehelper_url('index'));
}
}
/**
* If the site has been upgraded, display an error.
*/
function tool_qeupgradehelper_require_not_upgraded() {
if (tool_qeupgradehelper_is_upgraded()) {
throw new moodle_exception('notupgradedsiterequired', 'tool_qeupgradehelper',
tool_qeupgradehelper_url('index'));
}
}
/**
* Get the URL of a script within this plugin.
* @param string $script the script name, without .php. E.g. 'index'.
* @param array $params URL parameters (optional).
*/
function tool_qeupgradehelper_url($script, $params = array()) {
return new moodle_url('/admin/tool/qeupgradehelper/' . $script . '.php', $params);
}
/**
* Class to encapsulate one of the functionalities that this plugin offers.
*
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class tool_qeupgradehelper_action {
/** @var string the name of this action. */
public $name;
/** @var moodle_url the URL to launch this action. */
public $url;
/** @var string a description of this aciton. */
public $description;
/**
* Constructor to set the fields.
*/
protected function __construct($name, moodle_url $url, $description) {
$this->name = $name;
$this->url = $url;
$this->description = $description;
}
/**
* Make an action with standard values.
* @param string $shortname internal name of the action. Used to get strings
* and build a URL.
* @param array $params any URL params required.
*/
public static function make($shortname, $params = array()) {
return new self(
get_string($shortname, 'tool_qeupgradehelper'),
tool_qeupgradehelper_url($shortname, $params),
get_string($shortname . '_desc', 'tool_qeupgradehelper'));
}
}
/**
* A class to represent a list of quizzes with various information about
* attempts that can be displayed as a table.
*
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class tool_qeupgradehelper_quiz_list {
public $title;
public $intro;
public $quizacolheader;
public $sql;
public $quizlist = null;
public $totalquizas = 0;
public $totalqas = 0;
protected function __construct($title, $intro, $quizacolheader) {
global $DB;
$this->title = get_string($title, 'tool_qeupgradehelper');
$this->intro = get_string($intro, 'tool_qeupgradehelper');
$this->quizacolheader = get_string($quizacolheader, 'tool_qeupgradehelper');
$this->build_sql();
$this->quizlist = $DB->get_records_sql($this->sql);
}
protected function build_sql() {
$this->sql = '
SELECT
quiz.id,
quiz.name,
c.shortname,
c.id AS courseid,
COUNT(1) AS attemptcount,
SUM(qsesscounts.num) AS questionattempts
FROM {quiz_attempts} quiza
JOIN {quiz} quiz ON quiz.id = quiza.quiz
JOIN {course} c ON c.id = quiz.course
LEFT JOIN (
SELECT attemptid, COUNT(1) AS num
FROM {question_sessions}
GROUP BY attemptid
) qsesscounts ON qsesscounts.attemptid = quiza.uniqueid
WHERE quiza.preview = 0
' . $this->extra_where_clause() . '
GROUP BY quiz.id, quiz.name, c.shortname, c.id
ORDER BY c.shortname, quiz.name, quiz.id';
}
abstract protected function extra_where_clause();
public function get_col_headings() {
return array(
get_string('quizid', 'tool_qeupgradehelper'),
get_string('course'),
get_string('pluginname', 'quiz'),
$this->quizacolheader,
get_string('questionsessions', 'tool_qeupgradehelper'),
);
}
public function get_row($quizinfo) {
$this->totalquizas += $quizinfo->attemptcount;
$this->totalqas += $quizinfo->questionattempts;
return array(
$quizinfo->id,
html_writer::link(new moodle_url('/course/view.php',
array('id' => $quizinfo->courseid)), format_string($quizinfo->shortname)),
html_writer::link(new moodle_url('/mod/quiz/view.php',
array('q' => $quizinfo->id)), format_string($quizinfo->name)),
$quizinfo->attemptcount,
$quizinfo->questionattempts ? $quizinfo->questionattempts : 0,
);
}
public function get_row_class($quizinfo) {
return null;
}
public function get_total_row() {
return array(
'',
html_writer::tag('b', get_string('total')),
'',
html_writer::tag('b', $this->totalquizas),
html_writer::tag('b', $this->totalqas),
);
}
public function is_empty() {
return empty($this->quizlist);
}
}
/**
* A list of quizzes that still need to be upgraded after the main upgrade.
*
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class tool_qeupgradehelper_upgradable_quiz_list extends tool_qeupgradehelper_quiz_list {
public function __construct() {
parent::__construct('quizzeswithunconverted', 'listtodointro', 'attemptstoconvert');
}
protected function extra_where_clause() {
return 'AND quiza.needsupgradetonewqe = 1';
}
public function get_col_headings() {
$headings = parent::get_col_headings();
$headings[] = get_string('action', 'tool_qeupgradehelper');
return $headings;
}
public function get_row($quizinfo) {
$row = parent::get_row($quizinfo);
$row[] = html_writer::link(tool_qeupgradehelper_url('convertquiz', array('quizid' => $quizinfo->id)),
get_string('convertquiz', 'tool_qeupgradehelper'));
return $row;
}
}
/**
* A list of quizzes that still need to be upgraded after the main upgrade.
*
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class tool_qeupgradehelper_resettable_quiz_list extends tool_qeupgradehelper_quiz_list {
public function __construct() {
parent::__construct('quizzesthatcanbereset', 'listupgradedintro', 'convertedattempts');
}
protected function extra_where_clause() {
return 'AND quiza.needsupgradetonewqe = 0
AND EXISTS(SELECT 1 FROM {question_states}
WHERE attempt = quiza.uniqueid)';
}
public function get_col_headings() {
$headings = parent::get_col_headings();
$headings[] = get_string('action', 'tool_qeupgradehelper');
return $headings;
}
public function get_row($quizinfo) {
$row = parent::get_row($quizinfo);
$row[] = html_writer::link(tool_qeupgradehelper_url('resetquiz', array('quizid' => $quizinfo->id)),
get_string('resetquiz', 'tool_qeupgradehelper'));
return $row;
}
}
/**
* A list of quizzes that will be upgraded during the main upgrade.
*
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class tool_qeupgradehelper_pre_upgrade_quiz_list extends tool_qeupgradehelper_quiz_list {
public function __construct() {
parent::__construct('quizzestobeupgraded', 'listpreupgradeintro', 'numberofattempts');
}
protected function extra_where_clause() {
return '';
}
}
/**
* A list of quizzes that will be upgraded during the main upgrade, when the
* partialupgrade.php script is being used.
*
* @copyright 2011 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class tool_qeupgradehelper_pre_upgrade_quiz_list_restricted extends tool_qeupgradehelper_pre_upgrade_quiz_list {
protected $quizids;
protected $restrictedtotalquizas = 0;
protected $restrictedtotalqas = 0;
public function __construct($quizids) {
parent::__construct();
$this->quizids = $quizids;
}
public function get_row_class($quizinfo) {
if (!in_array($quizinfo->id, $this->quizids)) {
return 'dimmed';
} else {
return parent::get_row_class($quizinfo);
}
}
public function get_col_headings() {
$headings = parent::get_col_headings();
$headings[] = get_string('includedintheupgrade', 'tool_qeupgradehelper');
return $headings;
}
public function get_row($quizinfo) {
$row = parent::get_row($quizinfo);
if (in_array($quizinfo->id, $this->quizids)) {
$this->restrictedtotalquizas += $quizinfo->attemptcount;
$this->restrictedtotalqas += $quizinfo->questionattempts;
$row[] = get_string('yes');
} else {
$row[] = get_string('no');
}
return $row;
}
protected function out_of($restrictedtotal, $fulltotal) {
$a = new stdClass();
$a->some = $a->some = html_writer::tag('b', $restrictedtotal);
$a->total = $fulltotal;
return get_string('outof', 'tool_qeupgradehelper', $a);
}
public function get_total_row() {
return array(
'',
html_writer::tag('b', get_string('total')),
'',
$this->out_of($this->restrictedtotalquizas, $this->totalquizas),
$this->out_of($this->restrictedtotalqas, $this->totalqas),
);
}
}
/**
* List the number of quiz attempts that were never upgraded from 1.4 -> 1.5.
* @return int the number of such attempts.
*/
function tool_qeupgradehelper_get_num_very_old_attempts() {
global $DB;
return $DB->count_records_sql('
SELECT COUNT(1)
FROM {quiz_attempts} quiza
WHERE uniqueid IN (
SELECT DISTINCT qst.attempt
FROM {question_states} qst
LEFT JOIN {question_sessions} qsess ON
qst.question = qsess.questionid AND qst.attempt = qsess.attemptid
WHERE qsess.id IS NULL)');
}
/**
* Get the information about a quiz to be upgraded.
* @param integer $quizid the quiz id.
* @return object the information about that quiz, as for
* {@link tool_qeupgradehelper_get_upgradable_quizzes()}.
*/
function tool_qeupgradehelper_get_quiz($quizid) {
global $DB;
return $DB->get_record_sql("
SELECT
quiz.id,
quiz.name,
c.shortname,
c.id AS courseid,
COUNT(1) AS numtoconvert
FROM {quiz_attempts} quiza
JOIN {quiz} quiz ON quiz.id = quiza.quiz
JOIN {course} c ON c.id = quiz.course
WHERE quiza.preview = 0
AND quiza.needsupgradetonewqe = 1
AND quiz.id = ?
GROUP BY quiz.id, quiz.name, c.shortname, c.id
ORDER BY c.shortname, quiz.name, quiz.id", array($quizid));
}
/**
* Get the information about a quiz to be upgraded.
* @param integer $quizid the quiz id.
* @return object the information about that quiz, as for
* {@link tool_qeupgradehelper_get_resettable_quizzes()}, but with extra fields
* totalattempts and resettableattempts.
*/
function tool_qeupgradehelper_get_resettable_quiz($quizid) {
global $DB;
return $DB->get_record_sql("
SELECT
quiz.id,
quiz.name,
c.shortname,
c.id AS courseid,
COUNT(1) AS totalattempts,
SUM(CASE WHEN quiza.needsupgradetonewqe = 0 AND
oldtimemodified.time IS NOT NULL THEN 1 ELSE 0 END) AS convertedattempts,
SUM(CASE WHEN quiza.needsupgradetonewqe = 0 AND
newtimemodified.time IS NULL OR oldtimemodified.time >= newtimemodified.time
THEN 1 ELSE 0 END) AS resettableattempts
FROM {quiz_attempts} quiza
JOIN {quiz} quiz ON quiz.id = quiza.quiz
JOIN {course} c ON c.id = quiz.course
LEFT JOIN (
SELECT attempt, MAX(timestamp) AS time
FROM {question_states}
GROUP BY attempt
) AS oldtimemodified ON oldtimemodified.attempt = quiza.uniqueid
LEFT JOIN (
SELECT qa.questionusageid, MAX(qas.timecreated) AS time
FROM {question_attempts} qa
JOIN {question_attempt_steps} qas ON qas.questionattemptid = qa.id
GROUP BY qa.questionusageid
) AS newtimemodified ON newtimemodified.questionusageid = quiza.uniqueid
WHERE quiza.preview = 0
AND quiz.id = ?
GROUP BY quiz.id, quiz.name, c.shortname, c.id", array($quizid));
}
/**
* Get a question session id form a quiz attempt id and a question id.
* @param int $attemptid a quiz attempt id.
* @param int $questionid a question id.
* @return int the question session id.
*/
function tool_qeupgradehelper_get_session_id($attemptid, $questionid) {
global $DB;
$attempt = $DB->get_record('quiz_attempts', array('id' => $attemptid));
if (!$attempt) {
return null;
}
return $DB->get_field('question_sessions', 'id',
array('attemptid' => $attempt->uniqueid, 'questionid' => $questionid));
}
/**
* Identify the question session id of a question attempt matching certain
* requirements.
* @param integer $behaviour 0 = deferred feedback, 1 = interactive.
* @param string $statehistory of states, last first. E.g. 620.
* @param string $qtype question type.
* @return integer question_session.id.
*/
function tool_qeupgradehelper_find_test_case($behaviour, $statehistory, $qtype, $extratests) {
global $DB;
$params = array(
'qtype' => $qtype,
'statehistory' => $statehistory
);
if ($behaviour == 'deferredfeedback') {
$extrawhere = '';
$params['optionflags'] = 0;
} else if ($behaviour == 'adaptive') {
$extrawhere = 'AND penaltyscheme = :penaltyscheme';
$params['optionflags'] = 0;
$params['penaltyscheme'] = 0;
} else {
$extrawhere = 'AND penaltyscheme = :penaltyscheme';
$params['optionflags'] = 0;
$params['penaltyscheme'] = 1;
}
$possibleids = $DB->get_records_sql_menu('
SELECT
qsess.id,
1
FROM {question_sessions} qsess
JOIN {question_states} qst ON qst.attempt = qsess.attemptid
AND qst.question = qsess.questionid
JOIN {quiz_attempts} quiza ON quiza.uniqueid = qsess.attemptid
JOIN {quiz} quiz ON quiz.id = quiza.quiz
JOIN {question} q ON q.id = qsess.questionid
WHERE q.qtype = :qtype
AND quiz.optionflags = :optionflags
' . $extrawhere . '
GROUP BY
qsess.id
HAVING SUM(
(CASE WHEN qst.event = 10 THEN 1 ELSE qst.event END) *
POWER(10, CAST(qst.seq_number AS NUMERIC(110,0)))
) = :statehistory' . $extratests, $params, 0, 100);
if (!$possibleids) {
return null;
}
return array_rand($possibleids);
}
/**
* Grab all the data that upgrade will need for upgrading one
* attempt at one question from the old DB.
*/
function tool_qeupgradehelper_generate_unit_test($questionsessionid, $namesuffix) {
global $DB;
$qsession = $DB->get_record('question_sessions', array('id' => $questionsessionid));
$attempt = $DB->get_record('quiz_attempts', array('uniqueid' => $qsession->attemptid));
$quiz = $DB->get_record('quiz', array('id' => $attempt->quiz));
$qstates = $DB->get_records('question_states',
array('attempt' => $qsession->attemptid, 'question' => $qsession->questionid),
'seq_number, id');
$question = tool_qeupgradehelper_load_question($qsession->questionid, $quiz->id);
if (!tool_qeupgradehelper_is_upgraded()) {
if (!$quiz->optionflags) {
$quiz->preferredbehaviour = 'deferredfeedback';
} else if ($quiz->penaltyscheme) {
$quiz->preferredbehaviour = 'adaptive';
} else {
$quiz->preferredbehaviour = 'adaptivenopenalty';
}
unset($quiz->optionflags);
unset($quiz->penaltyscheme);
$question->defaultmark = $question->defaultgrade;
unset($question->defaultgrade);
}
$attempt->needsupgradetonewqe = 1;
echo '<textarea readonly="readonly" rows="80" cols="120" >' . "
public function test_{$question->qtype}_{$quiz->preferredbehaviour}_{$namesuffix}() {
";
tool_qeupgradehelper_display_convert_attempt_input($quiz, $attempt,
$question, $qsession, $qstates);
if ($question->qtype == 'random') {
list($randombit, $realanswer) = explode('-', reset($qstates)->answer, 2);
$newquestionid = substr($randombit, 6);
$newquestion = tool_qeupgradehelper_load_question($newquestionid);
$newquestion->maxmark = $question->maxmark;
echo tool_qeupgradehelper_format_var('$realquestion', $newquestion);
echo ' $this->loader->put_question_in_cache($realquestion);
';
}
echo '
$qa = $this->updater->convert_question_attempt($quiz, $attempt, $question, $qsession, $qstates);
$expectedqa = (object) array(';
echo "
'behaviour' => '{$quiz->preferredbehaviour}',
'questionid' => {$question->id},
'variant' => 1,
'maxmark' => {$question->maxmark},
'minfraction' => 0,
'flagged' => 0,
'questionsummary' => '',
'rightanswer' => '',
'responsesummary' => '',
'timemodified' => 0,
'steps' => array(";
foreach ($qstates as $state) {
echo "
{$state->seq_number} => (object) array(
'sequencenumber' => {$state->seq_number},
'state' => '',
'fraction' => null,
'timecreated' => {$state->timestamp},
'userid' => {$attempt->userid},
'data' => array(),
),";
}
echo '
),
);
$this->compare_qas($expectedqa, $qa);
}
</textarea>';
}
function tool_qeupgradehelper_format_var($name, $var) {
$out = var_export($var, true);
$out = str_replace('<', '&lt;', $out);
$out = str_replace('ADOFetchObj::__set_state(array(', '(object) array(', $out);
$out = str_replace('stdClass::__set_state(array(', '(object) array(', $out);
$out = str_replace('array (', 'array(', $out);
$out = preg_replace('/=> \n\s*/', '=> ', $out);
$out = str_replace(')),', '),', $out);
$out = str_replace('))', ')', $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n (?! )/', "\n ", $out);
$out = preg_replace('/\n(?! )/', "\n ", $out);
$out = preg_replace('/\bNULL\b/', 'null', $out);
return " $name = $out;\n";
}
function tool_qeupgradehelper_display_convert_attempt_input($quiz, $attempt,
$question, $qsession, $qstates) {
echo tool_qeupgradehelper_format_var('$quiz', $quiz);
echo tool_qeupgradehelper_format_var('$attempt', $attempt);
echo tool_qeupgradehelper_format_var('$question', $question);
echo tool_qeupgradehelper_format_var('$qsession', $qsession);
echo tool_qeupgradehelper_format_var('$qstates', $qstates);
}
function tool_qeupgradehelper_load_question($questionid, $quizid) {
global $CFG, $DB;
$question = $DB->get_record_sql('
SELECT q.*, qqi.grade AS maxmark
FROM {question} q
JOIN {quiz_question_instances} qqi ON qqi.question = q.id
WHERE q.id = :questionid AND qqi.quiz = :quizid',
array('questionid' => $questionid, 'quizid' => $quizid));
if (tool_qeupgradehelper_is_upgraded()) {
require_once($CFG->dirroot . '/question/engine/bank.php');
$qtype = question_bank::get_qtype($question->qtype, false);
} else {
global $QTYPES;
if (!array_key_exists($question->qtype, $QTYPES)) {
$question->qtype = 'missingtype';
$question->questiontext = '<p>' . get_string('warningmissingtype', 'quiz') . '</p>' . $question->questiontext;
}
$qtype = $QTYPES[$question->qtype];
}
$qtype->get_question_options($question);
return $question;
}
function tool_qeupgradehelper_get_quiz_for_upgrade() {
global $DB;
return $DB->get_record_sql("SELECT quiz.id
FROM {quiz_attempts} quiza
JOIN {quiz} quiz ON quiz.id = quiza.quiz
JOIN {course} c ON c.id = quiz.course
WHERE quiza.preview = 0 AND quiza.needsupgradetonewqe = 1
GROUP BY quiz.id, quiz.name, c.shortname, c.id
ORDER BY MAX(quiza.timemodified) DESC", array(), IGNORE_MULTIPLE);
}
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