Add rule DivisibleBy

Author: arifszn

resources/lang/en/validation.php

@@ -9,6 +9,7 @@
     'btc_address' => 'The :attribute must be a valid BTC address.',
     'credit_card' => 'The :attribute must be a valid credit card number.',
     'data_uri' => 'The :attribute must have data uri format.',
+    'divisible_by' => 'The :attribute must be divisible by :number.',
     'float_number' => 'The :attribute must be a float number',
     'image_url' => 'The :attribute must be a valid image URL.',
     'phone' => 'The :attribute must be a valid phone number.',

src/Rules/DivisibleBy.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace Arifszn\AdvancedValidation\Rules;
+
+use Illuminate\Contracts\Validation\Rule;
+
+/**
+ * The field under validation must be divisible by another.
+ *
+ * @package Arifszn\AdvancedValidation\Rules
+ */
+class DivisibleBy implements Rule
+{
+    /**
+     * @var string
+     */
+    private $errorMessage;
+
+    /**
+     * @var int
+     */
+    private $number;
+
+    /**
+     * @var string
+     */
+    private $attribute;
+
+    /**
+     * Create a new rule instance.
+     *
+     * @param int $number   Divisible by number.
+     * @param string|null $errorMessage   Custom error message.
+     * @return void
+     */
+    public function __construct(int $number, string $errorMessage = null)
+    {
+        $this->number = $number;
+        $this->errorMessage = $errorMessage;
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param string $attribute
+     * @param mixed $value
+     * @return bool
+     */
+    public function passes($attribute, $value)
+    {
+        $this->attribute = $attribute;
+
+        return (floatval($value) !== 0.0) && (floatval($value) % intval($this->number, 10) === 0);
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return string
+     */
+    public function message()
+    {
+        return $this->errorMessage ? $this->errorMessage : trans('advancedValidation::validation.divisible_by', [
+            'attribute' => $this->attribute,
+            'number' => $this->number
+        ]);
+    }
+}