3 files changed, 52 insertions, 45 deletions
diff --git a/src/Jasny/Auth.php b/src/Jasny/Auth.php
index 107883f..855960b 100644
--- a/src/Jasny/Auth.php
+++ b/src/Jasny/Auth.php
@@ -3,11 +3,29 @@
 namespace Jasny;
 
 use Jasny\Auth\User;
+use Jasny\Auth\Fetching;
 
 /**
  * Authentication and access control
+ * 
+ * <code>
+ * class MyAuth extends Jasny\Auth
+ * {
+ *     use Jasny\Auth\Sessions;
+ * 
+ *     public static function fetchUserById($id)
+ *     {
+ *         ...
+ *     }
+ * 
+ *     public static function fetchUserByUsername($username)
+ *     {
+ *         ...
+ *     }
+ * }
+ * </code>
  */
-abstract class Auth
+abstract class Auth implements Fetching
 {
     /**
      * Secret word for creating a verification hash
@@ -23,33 +41,22 @@ abstract class Auth
     
     
     /**
-     * Fetch a user by ID
-     * 
-     * @param int $id
-     * @return User
-     */
-    abstract public static function fetchUserById($id);
-
-    /**
-     * Fetch a user by username
-     * 
-     * @param string $username
-     * @return User
-     */
-    abstract public static function fetchUserByUsername($username);
-    
-    
-    /**
      * Persist the current user id across requests
      */
-    abstract protected static function persistCurrentUser();
+    protected static function persistCurrentUser()
+    {
+        // Black hole
+    }
     
     /**
      * Get current authenticated user id
      * 
      * @return mixed
      */
-    abstract protected static function getCurrentUserId();
+    protected static function getCurrentUserId()
+    {
+        return null;
+    }
     
     
     /**
diff --git a/src/Jasny/Auth/Fetching.php b/src/Jasny/Auth/Fetching.php
new file mode 100644
index 0000000..3d1c01d
--- /dev/null
+++ b/src/Jasny/Auth/Fetching.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace Auth;
+
+/**
+ * Methods that need to be implemented for fetching user info
+ */
+interface Fetching
+{
+    /**
+     * Fetch a user by ID
+     * 
+     * @param int $id
+     * @return User
+     */
+    public static function fetchUserById($id);
+
+    /**
+     * Fetch a user by username
+     * 
+     * @param string $username
+     * @return User
+     */
+    public static function fetchUserByUsername($username);
+}
diff --git a/src/Jasny/Auth/NoSessions.php b/src/Jasny/Auth/NoSessions.php
deleted file mode 100644
index 82d106d..0000000
--- a/src/Jasny/Auth/NoSessions.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-namespace Jasny\Auth;
-
-/**
- * Don't persist the authenticated user
- */
-trait NoSessions
-{
-    /**
-     * Don't persist
-     */
-    protected static function persistCurrentUser()
-    { }
-    
-    /**
-     * There is never a persisted user id
-     * 
-     * @return null
-     */
-    protected static function getCurrentUserId()
-    {
-        return null;
-    }
-}