[php][user_email-04_email_address_vo] Move logic to EmailAddress

Author: rgomezcasas

examples/php/php-user_email-04_email_address_vo/src/Controller/NewsletterController.php

@@ -4,14 +4,15 @@
 
 namespace CodelyTv\Controller;
 
+use CodelyTv\Model\EmailAddress;
 use CodelyTv\Model\Newsletter;
 use CodelyTv\Model\User;
 
 final class NewsletterController
 {
     public function post(string $emailAddress): Newsletter
     {
-        User::ensureEmailIsValid($emailAddress);
+        User::ensureEmailIsValid(new EmailAddress($emailAddress));
 
         return new Newsletter($emailAddress);
     }

examples/php/php-user_email-04_email_address_vo/src/Controller/UserController.php

@@ -4,12 +4,13 @@
 
 namespace CodelyTv\Controller;
 
+use CodelyTv\Model\EmailAddress;
 use CodelyTv\Model\User;
 
 final class UserController
 {
     public function post(string $emailAddress): User
     {
-        return new User($emailAddress);
+        return new User(new EmailAddress($emailAddress));
     }
 }

examples/php/php-user_email-04_email_address_vo/src/Model/EmailAddress.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Model;
+
+use InvalidArgumentException;
+
+final class EmailAddress
+{
+    private string $value;
+
+    public function __construct(string $value)
+    {
+        $this->ensureEmailIsNotEmpty($value);
+        $this->ensureEmailIsFormattedCorrectly($value);
+
+        $this->value = $value;
+    }
+
+    public function emailHasCommonProvider(): bool
+    {
+        return strpos($this->value(), '@yahoo')
+               || strpos($this->value(), '@gmail')
+               || strpos($this->value(), '@outlook');
+    }
+
+    public function value(): string
+    {
+        return $this->value;
+    }
+
+    private function ensureEmailIsNotEmpty(string $emailAddress): void
+    {
+        if ('' === $emailAddress) {
+            throw new InvalidArgumentException('The email address is empty');
+        }
+    }
+
+    private function ensureEmailIsFormattedCorrectly(string $emailAddress): void
+    {
+        if (!filter_var($emailAddress, FILTER_VALIDATE_EMAIL)) {
+            throw new InvalidArgumentException("The email address <$emailAddress> is not valid");
+        }
+    }
+}

examples/php/php-user_email-04_email_address_vo/src/Model/User.php

@@ -8,49 +8,25 @@
 
 final class User
 {
-    private string $emailAddress;
+    private EmailAddress $emailAddress;
 
-    public function __construct(string $emailAddress)
+    public function __construct(EmailAddress $emailAddress)
     {
         self::ensureEmailIsValid($emailAddress);
 
         $this->emailAddress = $emailAddress;
     }
 
-    public static function ensureEmailIsValid(string $emailAddress): void
+    public static function ensureEmailIsValid(EmailAddress $emailAddress): void
     {
-        self::ensureEmailIsNotEmpty($emailAddress);
-        self::ensureEmailIsFormattedCorrectly($emailAddress);
-        self::ensureEmailHasCommonProvider($emailAddress);
-    }
-
-    private static function ensureEmailIsNotEmpty(string $emailAddress): void
-    {
-        if ('' === $emailAddress) {
-            throw new InvalidArgumentException('The email address is empty');
-        }
-    }
-
-    private static function ensureEmailIsFormattedCorrectly(string $emailAddress): void
-    {
-        if (!filter_var($emailAddress, FILTER_VALIDATE_EMAIL)) {
-            throw new InvalidArgumentException("The email address <$emailAddress> is not valid");
-        }
-    }
-
-    private static function emailHasCommonProvider(string $emailAddress): bool
-    {
-        return strpos($emailAddress, '@yahoo') || strpos($emailAddress, '@gmail') || strpos($emailAddress, '@outlook');
-    }
-
-    private static function ensureEmailHasCommonProvider(string $emailAddress): void
-    {
-        if (!self::emailHasCommonProvider($emailAddress)) {
-            throw new InvalidArgumentException("The email address <$emailAddress> has not a common provider");
+        if (!$emailAddress->emailHasCommonProvider()) {
+            throw new InvalidArgumentException(
+                "The email address <{$emailAddress->value()}> has not a common provider"
+            );
         }
     }
 
-    public function emailAddress(): string
+    public function emailAddress(): EmailAddress
     {
         return $this->emailAddress;
     }

examples/php/php-user_email-04_email_address_vo/tests/Controller/UserControllerTest.php

@@ -5,6 +5,7 @@
 namespace CodelyTv\Tests\Controller;
 
 use CodelyTv\Controller\UserController;
+use CodelyTv\Model\EmailAddress;
 use CodelyTv\Model\User;
 use InvalidArgumentException;
 use PHPUnit\Framework\TestCase;
@@ -18,7 +19,7 @@ public function it_should_create_a_valid_user(): void
 
         $emailAddress = 'codely@gmail.com';
 
-        self::assertEquals(new User('codely@gmail.com'), $controller->post($emailAddress));
+        self::assertEquals(new User(new EmailAddress('codely@gmail.com')), $controller->post($emailAddress));
     }
 
     /** @test */