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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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namespace qbank_statistics;
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/**
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* Helper for statistics
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*
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* @package qbank_statistics
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* @copyright 2021 Catalyst IT Australia Pty Ltd
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* @author Nathan Nguyen <nathannguyen@catalyst-au.net>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class helper {
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/**
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* @var float Threshold to determine 'Needs checking?'
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*/
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private const NEED_FOR_REVISION_LOWER_THRESHOLD = 30;
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/**
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* @var float Threshold to determine 'Needs checking?'
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*/
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private const NEED_FOR_REVISION_UPPER_THRESHOLD = 50;
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/**
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* @deprecated since Moodle 4.3 please use the method from statistics_bulk_loader.
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*/
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#[\core\attribute\deprecated(
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'statistics_bulk_loader or get_required_statistics_fields',
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since: '4.3',
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mdl: 'MDL-75576',
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final: true
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)]
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public static function calculate_average_question_facility(int $questionid): ?float {
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ariadna |
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\core\deprecation::emit_deprecation([self::class, __FUNCTION__]);
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}
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/**
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* @deprecated since Moodle 4.3 please use the method from statistics_bulk_loader.
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*/
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#[\core\attribute\deprecated(
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'statistics_bulk_loader or get_required_statistics_fields',
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since: '4.3',
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mdl: 'MDL-75576',
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final: true
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)]
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public static function calculate_average_question_discriminative_efficiency(int $questionid): ?float {
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\core\deprecation::emit_deprecation([self::class, __FUNCTION__]);
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efrain |
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}
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/**
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* @deprecated since Moodle 4.3 please use the method from statistics_bulk_loader.
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*/
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#[\core\attribute\deprecated(
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'statistics_bulk_loader or get_required_statistics_fields',
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since: '4.3',
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mdl: 'MDL-75576',
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final: true
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)]
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public static function calculate_average_question_discrimination_index(int $questionid): ?float {
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\core\deprecation::emit_deprecation([self::class, __FUNCTION__]);
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}
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/**
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* Format a number to a localised percentage with specified decimal points.
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*
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* @param float|null $number The number being formatted
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* @param bool $fraction An indicator for whether the number is a fraction or is already multiplied by 100
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* @param int $decimals Sets the number of decimal points
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* @return string
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* @throws \coding_exception
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*/
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public static function format_percentage(?float $number, bool $fraction = true, int $decimals = 2): string {
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if (is_null($number)) {
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return get_string('na', 'qbank_statistics');
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}
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$coefficient = $fraction ? 100 : 1;
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return get_string('percents', 'moodle', format_float($number * $coefficient, $decimals));
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}
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/**
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* Format discrimination index (Needs checking?).
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*
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* @param float|null $value stats value
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* @return array
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*/
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public static function format_discrimination_index(?float $value): array {
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if (is_null($value)) {
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$content = get_string('emptyvalue', 'qbank_statistics');
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$classes = '';
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} else if ($value < self::NEED_FOR_REVISION_LOWER_THRESHOLD) {
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$content = get_string('verylikely', 'qbank_statistics');
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$classes = 'alert-danger';
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} else if ($value < self::NEED_FOR_REVISION_UPPER_THRESHOLD) {
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$content = get_string('likely', 'qbank_statistics');
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$classes = 'alert-warning';
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} else {
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$content = get_string('unlikely', 'qbank_statistics');
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$classes = 'alert-success';
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}
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return [$content, $classes];
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}
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}
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