Add digits_between rule

Author: phannaly

src/Rules/DigitsBetween.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Rakit\Validation\Rules;
+
+use Rakit\Validation\Rule;
+
+class DigitsBetween extends Rule
+{
+
+    protected $message = "The :attribute must have a length between the given :min and :max";
+
+    protected $fillable_params = ['min', 'max'];
+
+    public function check($value)
+    {
+    	$this->requireParameters($this->fillable_params);
+
+        $min = (int) $this->parameter('min');
+        $max = (int) $this->parameter('max');
+
+        $length = strlen((string) $value);
+
+        return ! preg_match('/[^0-9]/', $value)
+                    && $length >= $min && $length <= $max;
+    }
+
+}

src/Validator.php

@@ -107,7 +107,8 @@ protected function registerBaseValidators()
             'lowercase'                 => new Rules\Lowercase,
             'uppercase'                 => new Rules\Uppercase,
             'json'                      => new Rules\Json,
-            'digits'                      => new Rules\Digits,
+            'digits'                    => new Rules\Digits,
+            'digits_between'            => new Rules\DigitsBetween,
             'defaults'                  => new Rules\Defaults,
             'default'                   => new Rules\Defaults, // alias of defaults
         ];

tests/Rules/DigitsBetweenTest.php

@@ -0,0 +1,29 @@
+<?php
+
+use Rakit\Validation\Rules\DigitsBetween;
+
+class DigitsBetweenTest extends PHPUnit_Framework_TestCase
+{
+
+    public function setUp()
+    {
+        $this->rule = new DigitsBetween;
+    }
+
+    public function testValids()
+    {
+        $this->assertTrue($this->rule->fillParameters([2, 6])->check(12345));
+        $this->assertTrue($this->rule->fillParameters([2, 3])->check(12));
+        $this->assertTrue($this->rule->fillParameters([2, 3])->check(123));
+        $this->assertTrue($this->rule->fillParameters([3, 5])->check('12345'));
+    }
+
+    public function testInvalids()
+    {
+        $this->assertFalse($this->rule->fillParameters([4, 6])->check(12));
+        $this->assertFalse($this->rule->fillParameters([1, 3])->check(12345));
+        $this->assertFalse($this->rule->fillParameters([1, 3])->check(12345));
+        $this->assertFalse($this->rule->fillParameters([3, 6])->check('foobar'));
+    }
+
+}