Current File : /home/vacivi36/ava/question/bank/usage/classes/helper.php
<?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/>.
namespace qbank_usage;
/**
* Helper class for usage.
*
* @package qbank_usage
* @copyright 2021 Catalyst IT Australia Pty Ltd
* @author Safat Shahin <safatshahin@catalyst-au.net>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class helper {
/**
* Get the usage count for a question.
*
* @param \question_definition $question
* @return int
*/
public static function get_question_entry_usage_count($question) {
global $DB;
$sql = 'SELECT COUNT(*) FROM (' . self::question_usage_sql() . ') quizid';
return $DB->count_records_sql($sql, [$question->id, $question->questionbankentryid, 'mod_quiz', 'slot']);
}
/**
* Get the sql for usage data.
*
* @return string
*/
public static function question_usage_sql(): string {
$sqlset = "(". self::get_question_attempt_usage_sql() .")".
"UNION".
"(". self::get_question_bank_usage_sql() .")";
return $sqlset;
}
/**
* Get question attempt count for the question.
*
* @param int $questionid
* @param int $quizid
* @return int
*/
public static function get_question_attempts_count_in_quiz(int $questionid, $quizid = null): int {
global $DB;
if ($quizid) {
$sql = 'SELECT COUNT(qatt.id)
FROM {quiz} qz
JOIN {quiz_attempts} qa ON qa.quiz = qz.id
JOIN {question_usages} qu ON qu.id = qa.uniqueid
JOIN {question_attempts} qatt ON qatt.questionusageid = qu.id
JOIN {question} q ON q.id = qatt.questionid
WHERE qatt.questionid = :questionid
AND qa.preview = 0
AND qz.id = :quizid';
$param = ['questionid' => $questionid, 'quizid' => $quizid];
} else {
$sql = 'SELECT COUNT(qatt.id)
FROM {quiz_slots} qs
JOIN {quiz_attempts} qa ON qa.quiz = qs.quizid
JOIN {question_usages} qu ON qu.id = qa.uniqueid
JOIN {question_attempts} qatt ON qatt.questionusageid = qu.id
JOIN {question} q ON q.id = qatt.questionid
WHERE qatt.questionid = ?
AND qa.preview = 0';
$param = ['questionid' => $questionid];
}
return $DB->count_records_sql($sql, $param);
}
/**
* Get the question bank usage sql.
*
* The resulting string which represents a sql query has then to be
* called accompanying a $params array which includes the necessary
* parameters in the correct order which are the question id, then
* the component and finally the question area.
*
* @return string
*/
public static function get_question_bank_usage_sql(): string {
$sql = "SELECT qz.id as quizid,
qz.name as modulename,
qz.course as courseid
FROM {quiz_slots} slot
JOIN {quiz} qz ON qz.id = slot.quizid
JOIN {question_references} qr ON qr.itemid = slot.id
JOIN {question_bank_entries} qbe ON qbe.id = qr.questionbankentryid
JOIN {question_versions} qv ON qv.questionbankentryid = qbe.id
WHERE qv.questionbankentryid = ?
AND qr.component = ?
AND qr.questionarea = ?";
return $sql;
}
/**
* Get the question attempt usage sql.
*
* The resulting string which represents a sql query has then to be
* called accompanying a $params array which includes the necessary
* parameter, the question id.
*
* @return string
*/
public static function get_question_attempt_usage_sql(): string {
$sql = "SELECT qz.id as quizid,
qz.name as modulename,
qz.course as courseid
FROM {quiz} qz
JOIN {quiz_attempts} qa ON qa.quiz = qz.id
JOIN {question_usages} qu ON qu.id = qa.uniqueid
JOIN {question_attempts} qatt ON qatt.questionusageid = qu.id
JOIN {question} q ON q.id = qatt.questionid
WHERE qa.preview = 0
AND q.id = ?";
return $sql;
}
/**
* Get the question last used sql.
*
* @return string
*/
public static function get_question_last_used_sql(): string {
$sql = "SELECT MAX(qa.timemodified) as lastused
FROM {quiz} qz
JOIN {quiz_attempts} qa ON qa.quiz = qz.id
JOIN {question_usages} qu ON qu.id = qa.uniqueid
JOIN {question_attempts} qatt ON qatt.questionusageid = qu.id
JOIN {question} q ON q.id = qatt.questionid
WHERE qa.preview = 0
AND q.id = ?";
return $sql;
}
}
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