init

vendor/workerman/validation/library/Rules/Factor.php

@@ -0,0 +1,61 @@
+<?php
+
+/*
+ * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Rules;
+
+use function abs;
+use function is_integer;
+use function is_numeric;
+
+/**
+ * Validates if the input is a factor of the defined dividend.
+ *
+ * @author Danilo Correa <danilosilva87@gmail.com>
+ * @author David Meister <thedavidmeister@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+final class Factor extends AbstractRule
+{
+    /**
+     * @var int
+     */
+    private $dividend;
+
+    /**
+     * Initializes the rule.
+     */
+    public function __construct(int $dividend)
+    {
+        $this->dividend = $dividend;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        // Every integer is a factor of zero, and zero is the only integer that
+        // has zero for a factor.
+        if ($this->dividend === 0) {
+            return true;
+        }
+
+        // Factors must be integers that are not zero.
+        if (!is_numeric($input) || (int) $input != $input || $input == 0) {
+            return false;
+        }
+
+        $input = (int) abs((int) $input);
+        $dividend = (int) abs($this->dividend);
+
+        // The dividend divided by the input must be an integer if input is a
+        // factor of the dividend.
+        return is_integer($dividend / $input);
+    }
+}