Add "logged in" access check

src/mibew/libs/classes/Mibew/AccessControl/Check/LoggedInCheck.php

@@ -0,0 +1,31 @@
+<?php
+/*
+ * Copyright 2005-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Mibew\AccessControl\Check;
+
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Checks if operator from the request is logged in.
+ */
+class LoggedInCheck
+{
+    public function __invoke(Request $request)
+    {
+        return (bool)$request->attributes->get('_operator');
+    }
+}