/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.
*/

package org.apache.hadoop.yarn.webapp.view;

import org.apache.hadoop.classification.InterfaceAudience;

@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
public class HeaderBlock extends HtmlBlock {

  @Override protected void render(Block html) {
    String loggedIn = ""; 
    if (request().getRemoteUser() != null) {
      loggedIn = "Logged in as: " + request().getRemoteUser();
    }
    html.
      div("#header.ui-widget").
        div("#user").
          _(loggedIn)._().
        div("#logo").
          img("/static/hadoop-st.png")._().
        h1($(TITLE))._();
  }
}
