More work on filters.

app/Http/Filters/GuestFilter.php

+<?php namespace App\Http\Filters;
+
+use Illuminate\Contracts\Routing\ResponseFactory;
+
+class GuestFilter {
+
+	/**
+	 * The authenticator implementation.
+	 *
+	 * @var Authenticator
+	 */
+	protected $auth;
+
+    /**
+     * The response factory implementation.
+     *
+     * @var ResponseFactory
+     */
+    protected $response;
+
+	/**
+	 * Create a new filter instance.
+	 *
+	 * @param  Authenticator  $auth
+	 * @return void
+	 */
+	public function __construct(Authenticator $auth,
+                                ResponseFacotry $response)
+	{
+		$this->auth = $auth;
+		$this->response = $response;
+	}
+
+	/**
+	 * Run the request filter.
+	 *
+	 * @return mixed
+	 */
+	public function filter()
+	{
+		if ($this->auth->check())
+		{
+			return $this->response->redirectTo('/');
+		}
+	}
+
+}
\ No newline at end of file