Add generic authorization class

app/Core/Security/Authorization.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Kanboard\Core\Security;
+
+/**
+ * Authorization Handler
+ *
+ * @package  security
+ * @author   Frederic Guillot
+ */
+class Authorization
+{
+    /**
+     * Access Map
+     *
+     * @access private
+     * @var AccessMap
+     */
+    private $acl;
+
+    /**
+     * Constructor
+     *
+     * @access public
+     * @param  AccessMap  $acl
+     */
+    public function __construct(AccessMap $acl)
+    {
+        $this->acl = $acl;
+    }
+
+    /**
+     * Check if the given role is allowed to access to the specified resource
+     *
+     * @access public
+     * @param  string  $controller
+     * @param  string  $method
+     * @param  string  $role
+     * @return boolean
+     */
+    public function isAllowed($controller, $method, $role)
+    {
+        $roles = $this->acl->getRoles($controller, $method);
+        return in_array($role, $roles);
+    }
+}