/************************************************************************
    * Copyright (c) 2000-2006 The Apache Software Foundation.             *
    * All rights reserved.                                                *
    * ------------------------------------------------------------------- *
    * 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.                      *
   ***********************************************************************/
  
  package org.apache.james.transport.mailets;
  
  import org.apache.avalon.cornerstone.services.store.Store;
  import org.apache.avalon.framework.configuration.DefaultConfiguration;
  import org.apache.avalon.framework.service.ServiceException;
  import org.apache.avalon.framework.service.ServiceManager;
  import org.apache.james.Constants;
  import org.apache.james.services.MailRepository;
  import org.apache.mailet.GenericMailet;
  import org.apache.mailet.Mail;
  
  import javax.mail.MessagingException;
  
  import java.util.Iterator;
  
  /***
   * Re-spools Mail found in the specified Repository.
   *
   * <mailet match="RecipientIs=respool@localhost" class="FromRepository">
   *    &lt;repositoryPath&gt; <i>repository path</i> &lt;/repositoryPath&gt;
   *    &lt;processor&gt; <i>target processor</i> &lt;/repositoryPath&gt;
   *    &lt;delete&t; [true|<b>false</b>] &lt;/delete&gt;
   * &lt;/mailet&gt;
   *
   * @version This is $Revision: 382444 $
   */
  public class FromRepository extends GenericMailet {
  
      /***
       * The repository from where this mailet spools mail.
       */
      private MailRepository repository;
  
      /***
       * Whether this mailet should delete messages after being spooled
       */
      private boolean delete = false;
  
      /***
       * The path to the repository
       */
      private String repositoryPath;
  
      /***
       * The processor that will handle the re-spooled message(s)
       */
      private String processor;
  
      /***
       * Initialize the mailet, loading configuration information.
       */
      public void init() {
          repositoryPath = getInitParameter("repositoryPath");
          processor = (getInitParameter("processor") == null) ? Mail.DEFAULT : getInitParameter("processor");
  
          try {
              delete = (getInitParameter("delete") == null) ? false : new Boolean(getInitParameter("delete")).booleanValue();
          } catch (Exception e) {
              // Ignore exception, default to false
          }
  
          ServiceManager compMgr = (ServiceManager)getMailetContext().getAttribute(Constants.AVALON_COMPONENT_MANAGER);
          try {
              Store mailstore = (Store) compMgr.lookup(Store.ROLE);
              DefaultConfiguration mailConf
                  = new DefaultConfiguration("repository", "generated:ToRepository");
              mailConf.setAttribute("destinationURL", repositoryPath);
              mailConf.setAttribute("type", "MAIL");
              repository = (MailRepository) mailstore.select(mailConf);
          } catch (ServiceException cnfe) {
              log("Failed to retrieve Store component:" + cnfe.getMessage());
          } catch (Exception e) {
              log("Failed to retrieve Store component:" + e.getMessage());
          }
      }
  
      /***
       * Spool mail from a particular repository.
       *
       * @param triggering e-mail (eventually parameterize via the
       * trigger message)
       */
     public void service(Mail trigger) throws MessagingException {
         trigger.setState(Mail.GHOST);
         java.util.Collection processed = new java.util.ArrayList();
         Iterator list = repository.list();
         while (list.hasNext()) {
             String key = (String) list.next();
             try {
                 Mail mail =  repository.retrieve(key);
                 if (mail != null && mail.getRecipients() != null) {
                     log((new StringBuffer(160).append("Spooling mail ").append(mail.getName()).append(" from ").append(repositoryPath)).toString());
 
                     /*
                     log("Return-Path: " + mail.getMessage().getHeader(RFC2822Headers.RETURN_PATH, ", "));
                     log("Sender: " + mail.getSender());
                     log("To: " + mail.getMessage().getHeader(RFC2822Headers.TO, ", "));
                     log("Recipients: ");
                     for (Iterator i = mail.getRecipients().iterator(); i.hasNext(); ) {
                         log("    " + ((MailAddress)i.next()).toString());
                     };
                     */
 
                     mail.setAttribute("FromRepository", Boolean.TRUE);
                     mail.setState(processor);
                     getMailetContext().sendMail(mail);
                     if (delete) processed.add(key);
                 }
             } catch (MessagingException e) {
                 log((new StringBuffer(160).append("Unable to re-spool mail ").append(key).append(" from ").append(repositoryPath)).toString(), e);
             }
         }
 
         if (delete) {
             Iterator delList = processed.iterator();
             while (delList.hasNext()) {
                 repository.remove((String)delList.next());
             }
         }
     }
 
     /***
      * Return a string describing this mailet.
      *
      * @return a string describing this mailet
      */
     public String getMailetInfo() {
         return "FromRepository Mailet";
     }
 }