Posibility to set multiple devices for one user

.gitignore

@@ -1,3 +1,4 @@
 vendor/
 composer.lock
 .DS_Store
+.idea/

library/Pushy/User.php

@@ -24,9 +24,9 @@ class User
     /**
      * User's device name
      *
-     * @var string
+     * @var array
      */
-    protected $deviceName;
+    protected $deviceName = array();
 
     /**
      * Instantiate a user object
@@ -38,7 +38,10 @@ public function __construct($id = null, $deviceName = null)
     {
         // Set user Id and device
         $this->setId($id);
-        $this->setDeviceName($deviceName);
+
+        if ($deviceName) {
+            $this->setDeviceName($deviceName);
+        }
     }
 
     /**
@@ -79,7 +82,7 @@ public function setId($id)
      */
     public function getDeviceName()
     {
-        return $this->deviceName;
+        return implode(',', $this->deviceName);
     }
 
     /**
@@ -98,8 +101,10 @@ public function setDeviceName($deviceName)
                 . ' and contain character set [A-Za-z0-9-]'
             );
         }
-
-        $this->deviceName = (string) $deviceName;
+
+        if (!in_array($deviceName, $this->deviceName)) {
+            $this->deviceName[] = (string) $deviceName;
+        }
 
         return $this;
     }

tests/Pushy/Test/UserTest.php

@@ -75,6 +75,23 @@ public function testGetSetDeviceName()
         $this->assertEquals($deviceName, $this->user->getDeviceName());
     }
 
+    /**
+     * Test: Get/Set Multiple Device Name
+     *
+     * @covers \Pushy\User::getDeviceName
+     * @covers \Pushy\User::setDeviceName
+     */
+    public function testGetSetMultipleDeviceName()
+    {
+        $deviceName = 'test-device';
+        $deviceName2 = 'my-test';
+
+        $this->user->setDeviceName($deviceName)
+                   ->setDeviceName($deviceName2);
+
+        $this->assertEquals($deviceName . ',' . $deviceName2, $this->user->getDeviceName());
+    }
+
     /**
      * Test: Set device name with an invalid value
      *