/*
    * 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.myfaces.tobago.util;
  
  import org.apache.myfaces.tobago.ajax.AjaxUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.faces.application.NavigationHandler;
  import javax.faces.context.FacesContext;
  
  public class DebugNavigationHandler extends NavigationHandler {
  
    private static final Logger LOG = LoggerFactory.getLogger(DebugNavigationHandler.class);
  
    private NavigationHandler navigationHandler;
  
    public DebugNavigationHandler(NavigationHandler navigationHandler) {
      this.navigationHandler = navigationHandler;
    }
  
    public void handleNavigation(FacesContext facesContext, String fromAction, String outcome) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("Handle Navigation context: " + facesContext + " fromAction: '"
            + fromAction + "' outcome: '" + outcome + "'");
      }
  
      if (outcome != null && AjaxUtils.isAjaxRequest(facesContext)) {
          LOG.warn("An AJAX-Request should not have an outcome set: outcome='" + outcome + "'");
      }
  
      navigationHandler.handleNavigation(facesContext, fromAction, outcome);
  
      if (LOG.isDebugEnabled()) {
        LOG.debug("Handled Navigation context: " + facesContext + " fromAction: '"
            + fromAction + "' outcome: '" + outcome + "'");
      }
  
    }
  }