/**
    * This file Copyright (c) 2003-2012 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.audit;
  
  import info.magnolia.objectfactory.Components;
  
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Class for auditory logging, it's optional to define it, configured in mgnl-beans.properties.
   *
   * @version $Id$
   */
  public class AuditLoggingManager {
  
      private List<LogConfiguration> logConfigurations = new ArrayList<LogConfiguration>();
  
      private String defaultSeparator = ", ";
  
      private static Logger applog = LoggerFactory.getLogger(AuditLoggingManager.class);
  
      public static AuditLoggingManager getInstance() {
          try {
              return Components.getComponent(AuditLoggingManager.class);
          } catch (Exception e) {
              // if not defined skip and return null
              applog.info("Class AuditLoggingManager not defined");
              return null;
          }
      }
  
      public void addLogConfigurations(LogConfiguration action) {
          this.logConfigurations.add(action);
      }
  
      public List<LogConfiguration> getLogConfigurations() {
          return logConfigurations;
      }
  
      public void setLogConfigurations(List<LogConfiguration> logConfigurations) {
          this.logConfigurations = logConfigurations;
      }
  
      public LogConfiguration getLogConfiguration(String action) {
          Iterator<LogConfiguration> iterator = this.logConfigurations.iterator();
          while (iterator.hasNext()) {
              final LogConfiguration trail = iterator.next();
              if (StringUtils.equals(trail.getName(), action)) {
                  return trail;
              }
          }
          return null;
      }
  
      /**
       * AuditLogging is active when at least one of log configurations is active.
       */
      public boolean isAuditLoggingActive() {
          Iterator<LogConfiguration> iterator = this.logConfigurations.iterator();
          while (iterator.hasNext()) {
              final LogConfiguration trail = iterator.next();
              if (trail.isActive()) {
                 return true;
             }
         }
         return false;
     }
 
     public void log(String action, String[] data) {
         StringBuilder message = new StringBuilder();
         LogConfiguration trail = this.getLogConfiguration(action);
         if (trail == null) {
             applog.trace("Can't get log configuration");
         } else {
             String separator = defaultSeparator;
             if (!StringUtils.isEmpty(trail.getSeparator())) {
                 separator = trail.getSeparator();
             }
             message.append(separator).append(action);
             if (trail.isActive()) {
                 for (int i = 0; i < data.length; i++) {
                     if (StringUtils.isNotEmpty(data[i])) {
                         message.append(separator).append(data[i]);
                     }
 
                 }
                 org.apache.log4j.Logger.getLogger(trail.getLogName()).log(LoggingLevel.AUDIT_TRAIL, message.toString());
             }
         }
     }
 
     public String getDefaultSeparator() {
         return defaultSeparator;
     }
 
     public void setDefaultSeparator(String defaultSeparator) {
         this.defaultSeparator = defaultSeparator;
     }
 }