Merge pull request #7 from arifszn/feat/rule-FloatNumber

feat: rule float number

Author: arifszn

README.md

@@ -49,6 +49,7 @@ public function rules()
 - [`Btc Address`](#btcaddress)
 - [`Credit Card`](#creditcard)
 - [`Data URI`](#datauri)
+- [`Float Number`](#floatnumber)
 - [`Image URL`](#imageurl)
 - [`Phone`](#phone)
 - [`Without Spaces`](#withoutspaces)
@@ -159,6 +160,21 @@ public function rules()
 }
 ```
 
+### `FloatNumber`
+
+The field under validation must be a float number.
+
+```php
+use Arifszn\AdvancedValidation\Rules\FloatNumber;
+
+public function rules()
+{
+    return [
+        'foo' => [new FloatNumber()],
+    ];
+}
+```
+
 ### `ImageURL`
 
 The field under validation must be a valid image URL.

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.',
+    '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.',
     'without_spaces' => 'The :attribute must not contain spaces.',

src/Rules/FloatNumber.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace Arifszn\AdvancedValidation\Rules;
+
+use Illuminate\Contracts\Validation\Rule;
+
+/**
+ * The field under validation must be a float number.
+ *
+ * @package Arifszn\AdvancedValidation\Rules
+ */
+class FloatNumber implements Rule
+{
+    /**
+     * @var string
+     */
+    private $errorMessage;
+
+    /**
+     * Create a new rule instance.
+     *
+     * @param string|null $errorMessage   Custom error message.
+     * @return void
+     */
+    public function __construct(string $errorMessage = null)
+    {
+        $this->errorMessage = $errorMessage;
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param string $attribute
+     * @param mixed $value
+     * @return bool
+     */
+    public function passes($attribute, $value)
+    {
+        $regex = '/^(?:[-+])?(?:[0-9]+)?(?:\\.[0-9]*)?(?:[eE][\\+\\-]?(?:[0-9]+))?$/';
+
+        if ($value === '' || $value === '.' || $value === '-' || $value === '+') {
+            return false;
+        }
+
+        $value = str_replace(',', '.', $value);
+
+        return is_numeric($value) && preg_match($regex, $value);
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return string
+     */
+    public function message()
+    {
+        return $this->errorMessage ? $this->errorMessage : trans('advancedValidation::validation.float_number');
+    }
+}

tests/Rules/FloatNumberTest.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Arifszn\AdvancedValidation\Tests\Rules;
+
+use Arifszn\AdvancedValidation\Rules\FloatNumber;
+use Arifszn\AdvancedValidation\Tests\TestCase;
+
+class FloatNumberTest extends TestCase
+{
+    /**
+     * @dataProvider provider
+     */
+    public function testValidation($result, $value)
+    {
+        $this->assertEquals($result, (new FloatNumber())->passes('foo', $value));
+    }
+
+    public function provider()
+    {
+        return [
+            [true, '123'],
+            [true, '123.'],
+            [true, '123.123'],
+            [true, '-123.123'],
+            [true, '-0.123'],
+            [true, '+0.123'],
+            [true, '0.123'],
+            [true, '.0'],
+            [true, '-.123'],
+            [true, '+.123'],
+            [true, '01.123'],
+            [true, '-0.22250738585072011e-307'],
+
+            [false, '+'],
+            [false, '-'],
+            [false, ' '],
+            [false, ''],
+            [false, '.'],
+            [false, 'foo'],
+            [false, '20.foo'],
+            [false, '2020-01-06T14:31:00.135Z'],
+        ];
+    }
+}