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19  
20  package org.apache.james.transport.mailets.listservcommands;
21  
22  import org.apache.avalon.framework.configuration.Configuration;
23  import org.apache.avalon.framework.configuration.ConfigurationException;
24  import org.apache.james.services.UsersRepository;
25  import org.apache.james.transport.mailets.ICommandListservManager;
26  import org.apache.james.util.XMLResources;
27  import org.apache.mailet.Mail;
28  import org.apache.mailet.MailAddress;
29  
30  import javax.mail.MessagingException;
31  import java.util.Properties;
32  
33  /***
34   * UnSubscribe handles the unsubscribe command.
35   * It is configured by:
36   * <pre>&lt;command name="unsubscribe" class="UnSubscribe"/&gt;</pre>
37   *
38   * <br />
39   * <br />
40   *
41   * It uses the formatted text-based resources for its return mail body:
42   * <ul>
43   *  <li>unsubscribe
44   * </ul>
45   *
46   * <br />
47   * <br />
48   * After formatting the text, the message is delivered with {@link #sendStandardReply}
49   *
50   * Note, prior to formatting and sending any text, the user is checked to see that they
51   * are currently subscribed to this list.  If so, they will be sent a confirmation mail to
52   * be processed by {@link UnSubscribeConfirm}
53   *
54   * @version CVS $Revision: 494012 $ $Date: 2007-01-08 10:23:58 +0000 (lun, 08 gen 2007) $
55   * @since 2.2.0
56   * @see UnSubscribeConfirm
57   */
58  public class UnSubscribe extends BaseCommand {
59  
60      //For resources
61      protected XMLResources xmlResources;
62  
63      public void init(ICommandListservManager commandListservManager, Configuration configuration) throws ConfigurationException {
64          super.init(commandListservManager, configuration);
65          xmlResources = initXMLResources(new String[]{"unsubscribe"})[0];
66      }
67  
68      /***
69       * After ensuring that the user is currently subscribed, confirmation mail
70       * will be sent to be processed by {@link UnSubscribeConfirm}.
71       * @param mail
72       * @throws MessagingException
73       */
74      public void onCommand(Mail mail) throws MessagingException {
75          if (checkSubscriptionStatus(mail)) {
76              //send confirmation mail
77              Properties props = getStandardProperties();
78              props.put("SENDER_ADDR", mail.getSender().toString());
79  
80              String confirmationMail = xmlResources.getString("text", props);
81              String subject = xmlResources.getString("confirm.unsubscribe.subject", props);
82              String replyAddress = xmlResources.getString("confirm.unsubscribe.address", props);
83  
84              sendStandardReply(mail, subject, confirmationMail, replyAddress);
85          }
86      }
87  
88      /***
89       * Checks to see that this user is already subscribed, if not return false and send a message
90       * @param mail
91       * @return false if the user isn't subscribed, true otherwise
92       * @throws MessagingException
93       */
94      protected boolean checkSubscriptionStatus(Mail mail) throws MessagingException {
95          MailAddress mailAddress = mail.getSender();
96          UsersRepository usersRepository = getUsersRepository();
97          if (!usersRepository.contains(mailAddress.toString())) {
98              getCommandListservManager().onError(mail,
99                      "Invalid request",
100                     xmlResources.getString("not.subscribed", getStandardProperties()));
101             return false;
102         }
103         return true;
104     }
105 }