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📁 classes
📁 db
📁 lang
📄 lib.php(2.37 KB)
📄 report.php(43.1 KB)
📄 statistics_form.php(2.47 KB)
📄 statistics_question_table.php(6.38 KB)
📄 statistics_table.php(22.26 KB)
📄 statisticslib.php(3.71 KB)
📁 tests
📄 upgrade.txt(1.01 KB)
📄 version.php(1 KB)

Editing: statisticslib.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/>.

/**
 * Common functions for the quiz statistics report.
 *
 * @package    quiz_statistics
 * @copyright  2013 The Open University
 * @author     James Pratt me@jamiep.org
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use mod_quiz\quiz_attempt;

defined('MOODLE_INTERNAL') || die;

/**
 * SQL to fetch relevant 'quiz_attempts' records.
 *
 * @param int    $quizid        quiz id to get attempts for
 * @param \core\dml\sql_join $groupstudentsjoins Contains joins, wheres, params, empty if not using groups
 * @param string $whichattempts which attempts to use, represented internally as one of the constants as used in
 *                                   $quiz->grademethod ie.
 *                                   QUIZ_GRADEAVERAGE, QUIZ_GRADEHIGHEST, QUIZ_ATTEMPTLAST or QUIZ_ATTEMPTFIRST
 *                                   we calculate stats based on which attempts would affect the grade for each student.
 * @param bool   $includeungraded whether to fetch ungraded attempts too
 * @return array FROM and WHERE sql fragments and sql params
 */
function quiz_statistics_attempts_sql($quizid, \core\dml\sql_join $groupstudentsjoins,
        $whichattempts = QUIZ_GRADEAVERAGE, $includeungraded = false) {
    $fromqa = "{quiz_attempts} quiza ";
    $whereqa = 'quiza.quiz = :quizid AND quiza.preview = 0 AND quiza.state = :quizstatefinished';
    $qaparams = ['quizid' => (int)$quizid, 'quizstatefinished' => quiz_attempt::FINISHED];

if (!empty($groupstudentsjoins->joins)) {
        $fromqa .= "\nJOIN {user} u ON u.id = quiza.userid
            {$groupstudentsjoins->joins} ";
        $whereqa .= " AND {$groupstudentsjoins->wheres}";
        $qaparams += $groupstudentsjoins->params;
    }

$whichattemptsql = quiz_report_grade_method_sql($whichattempts);
    if ($whichattemptsql) {
        $whereqa .= ' AND ' . $whichattemptsql;
    }

if (!$includeungraded) {
        $whereqa .= ' AND quiza.sumgrades IS NOT NULL';
    }

return [$fromqa, $whereqa, $qaparams];
}

/**
 * Return a {@link qubaid_condition} from the values returned by {@link quiz_statistics_attempts_sql}.
 *
 * @param int     $quizid
 * @param \core\dml\sql_join $groupstudentsjoins Contains joins, wheres, params
 * @param string $whichattempts which attempts to use, represented internally as one of the constants as used in
 *                                   $quiz->grademethod ie.
 *                                   QUIZ_GRADEAVERAGE, QUIZ_GRADEHIGHEST, QUIZ_ATTEMPTLAST or QUIZ_ATTEMPTFIRST
 *                                   we calculate stats based on which attempts would affect the grade for each student.
 * @param bool    $includeungraded
 * @return        \qubaid_join
 */
function quiz_statistics_qubaids_condition($quizid, \core\dml\sql_join $groupstudentsjoins,
        $whichattempts = QUIZ_GRADEAVERAGE, $includeungraded = false) {
    list($fromqa, $whereqa, $qaparams) = quiz_statistics_attempts_sql(
            $quizid, $groupstudentsjoins, $whichattempts, $includeungraded);
    return new qubaid_join($fromqa, 'quiza.uniqueid', $whereqa, $qaparams);
}

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