Add zipcode validator as a shortcort to regexp validator.

README.md

@@ -193,8 +193,12 @@ the function $validator->validateObject(Validatable) may be used.
 ###UrlValidator
  - usage: "url"
  - behavior: This a validly formatted URL.  Not RFC inclusive but should check most common types.
+
+ ###ZipcodeValidator
+  - usage: "zipcode"
+  - behavior: Validate zipcodes in the format of "12345", "12345-6789", or "123456789".  This validates only US zipcodes.
+  - TODO: Fix such that a country code can be accepted as an argument; build in this support.  US as default.
 
 ##TODO
- - Other validators?
- - Database object injection
+ - Unique Value Validator: Requires database object injection
 

src/Tdphillipsjr/Validator/ZipcodeValidator.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Tdphillipsjr\Validator;
+
+/**
+ * Determine if $data is a valid zipcode.  This only validates US zipcodes.
+ * Zipcodes may be 5 digits, 9 digits, or 9 digits with a hyphen.
+ */
+class ZipcodeValidator extends BaseValidator
+{
+    public function __construct($data)
+    {
+        parent::__construct($data, array());
+    }
+
+    /**
+     * This is not an RFC exhaustive validation, but it should match the most commonly
+     * used url formats. 
+     *
+     * @return boolean
+     * @throws Validator\ValidationException
+     */
+    public function validate()
+    {
+        $pattern = '/^\d{5}([\-]?\d{4})?$/';
+        if (!preg_match($pattern, $this->_data)) $this->addError('Zip code is not in a valid US format.');
+
+        return !sizeof($this->_errors);
+    }
+}

tests/Tdphillipsjr/Validator/ZipcodeValidatorTest.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Tdphillipsjr\Validator;
+
+use Tdphillipsjr\Validator\ZipcodeValidator;
+
+class ZipcodeValidatorTest extends \PHPUnit_Framework_TestCase
+{
+    public function testFiveDigitPass()
+    {
+        $data = 12345;
+        $validator = new ZipcodeValidator($data);
+        $this->assertTrue($validator->validate());
+    }
+
+    public function testNineDigitPass()
+    {
+        $data = 123456789;
+        $validator = new ZipcodeValidator($data);
+        $this->assertTrue($validator->validate());
+    }
+
+    public function testNineDigitHyphenPass()
+    {
+        $data = '12345-6789';
+        $validator = new ZipcodeValidator($data);
+        $this->assertTrue($validator->validate());
+    }
+
+    public function testShortFail()
+    {
+        $data = 1234;
+        $validator = new ZipcodeValidator($data);
+        $validator->setThrow(false);
+        $this->assertFalse($validator->validate());
+    }
+
+    public function testLetterFail()
+    {
+        $data = '12c45';
+        $validator = new ZipcodeValidator($data);
+        $validator->setThrow(false);
+        $this->assertFalse($validator->validate());
+    }
+
+    public function testBadSymfolFail()
+    {
+        $data = '12345&6789';
+        $validator = new ZipcodeValidator($data);
+        $validator->setThrow(false);
+        $this->assertFalse($validator->validate());
+    }
+}
+?>