PHP7 DataMapper

Structural/DataMapper/User.php

@@ -2,56 +2,34 @@
 
 namespace DesignPatterns\Structural\DataMapper;
 
-/**
- * DataMapper pattern.
- *
- * This is our representation of a DataBase record in the memory (Entity)
- *
- * Validation would also go in this object
- */
 class User
 {
     /**
-     * @var int
+     * @var string
      */
-    protected $userId;
+    private $username;
 
     /**
      * @var string
      */
-    protected $username;
+    private $email;
 
-    /**
-     * @var string
-     */
-    protected $email;
-
-    /**
-     * @param null $id
-     * @param null $username
-     * @param null $email
-     */
-    public function __construct($id = null, $username = null, $email = null)
+    public static function fromState(array $state): User
     {
-        $this->setUserID($id);
-        $this->setUsername($username);
-        $this->setEmail($email);
+        // validate state before accessing keys!
+
+        return new self(
+            $state['username'],
+            $state['email']
+        );
     }
 
-    /**
-     * @return int
-     */
-    public function getUserId()
+    public function __construct(string $username, string $email)
     {
-        return $this->userId;
-    }
+        // validate parameters before setting them!
 
-    /**
-     * @param int $userId
-     */
-    public function setUserID($userId)
-    {
-        $this->userId = $userId;
+        $this->username = $username;
+        $this->email = $email;
     }
 
     /**
@@ -62,14 +40,6 @@ class User
         return $this->username;
     }
 
-    /**
-     * @param string $username
-     */
-    public function setUsername($username)
-    {
-        $this->username = $username;
-    }
-
     /**
      * @return string
      */
@@ -77,12 +47,4 @@ class User
     {
         return $this->email;
     }
-
-    /**
-     * @param string $email
-     */
-    public function setEmail($email)
-    {
-        $this->email = $email;
-    }
 }