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ab3732f91f
SPDX IDs are shorter than licensing notes previously used, and adhere better to FOSS standards. It is also machine-readable.
95 lines
2 KiB
PHP
95 lines
2 KiB
PHP
<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Rules;
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use Respect\Validation\Exceptions\ComponentException;
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use function array_values;
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use function count;
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use function is_array;
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use function is_string;
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use function sprintf;
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use function str_split;
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/**
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* Validates whether the input is sorted in a certain order or not.
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*
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* @author Henrique Moody <henriquemoody@gmail.com>
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* @author Mikhail Vyrtsev <reeywhaar@gmail.com>
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*/
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final class Sorted extends AbstractRule
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{
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public const ASCENDING = 'ASC';
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public const DESCENDING = 'DESC';
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/**
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* @var string
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*/
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private $direction;
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public function __construct(string $direction)
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{
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if ($direction !== self::ASCENDING && $direction !== self::DESCENDING) {
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throw new ComponentException(
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sprintf('Direction should be either "%s" or "%s"', self::ASCENDING, self::DESCENDING)
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);
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}
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$this->direction = $direction;
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}
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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if (!is_array($input) && !is_string($input)) {
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return false;
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}
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$values = $this->getValues($input);
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$count = count($values);
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for ($position = 1; $position < $count; ++$position) {
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if (!$this->isSorted($values[$position], $values[$position - 1])) {
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return false;
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}
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}
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return true;
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}
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/**
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* @param mixed $current
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* @param mixed $last
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*/
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private function isSorted($current, $last): bool
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{
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if ($this->direction === self::ASCENDING) {
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return $current > $last;
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}
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return $current < $last;
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}
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/**
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* @param string|mixed[] $input
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*
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* @return mixed[]
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*/
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private function getValues($input): array
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{
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if (is_array($input)) {
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return array_values($input);
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}
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return str_split($input);
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}
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}
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