org.argeo.slc.mail/src/org/argeo/slc/mail/EmailUtils.java

   1 package org.argeo.slc.mail;
   2
   3 import java.util.Date;
   4
   5 import javax.mail.Address;
   6 import javax.mail.Flags;
   7 import javax.mail.Message;
   8 import javax.mail.MessagingException;
   9 import javax.mail.internet.InternetAddress;
  10 import javax.mail.internet.MimeMessage;
  11
  12 /** Utilities around emails. */
  13 public class EmailUtils {
  14         public final static String INBOX = "Inbox";
  15         public final static String MESSAGE_ID = "Message-ID";
  16
  17         public static String getMessageId(Message msg) {
  18                 try {
  19                         return msg instanceof MimeMessage ? ((MimeMessage) msg).getMessageID() : "<N/A>";
  20                 } catch (MessagingException e) {
  21                         throw new IllegalStateException("Cannot extract message id from " + msg, e);
  22                 }
  23         }
  24
  25         public static String describe(Message msg) {
  26                 try {
  27                         return "Message " + msg.getMessageNumber() + " " + msg.getSentDate().toInstant() + " " + getMessageId(msg);
  28                 } catch (MessagingException e) {
  29                         throw new IllegalStateException("Cannot describe " + msg, e);
  30                 }
  31         }
  32
  33         static void setHeadersFromFlags(MimeMessage msg, Flags flags) {
  34                 try {
  35                         StringBuilder status = new StringBuilder();
  36                         if (flags.contains(Flags.Flag.SEEN))
  37                                 status.append('R');
  38                         if (!flags.contains(Flags.Flag.RECENT))
  39                                 status.append('O');
  40                         if (status.length() > 0)
  41                                 msg.setHeader("Status", status.toString());
  42                         else
  43                                 msg.removeHeader("Status");
  44
  45                         boolean sims = false;
  46                         String s = msg.getHeader("X-Status", null);
  47                         // is it a SIMS 2.0 format X-Status header?
  48                         sims = s != null && s.length() == 4 && s.indexOf('$') >= 0;
  49                         //status.setLength(0);
  50                         if (flags.contains(Flags.Flag.DELETED))
  51                                 status.append('D');
  52                         else if (sims)
  53                                 status.append('$');
  54                         if (flags.contains(Flags.Flag.FLAGGED))
  55                                 status.append('F');
  56                         else if (sims)
  57                                 status.append('$');
  58                         if (flags.contains(Flags.Flag.ANSWERED))
  59                                 status.append('A');
  60                         else if (sims)
  61                                 status.append('$');
  62                         if (flags.contains(Flags.Flag.DRAFT))
  63                                 status.append('T');
  64                         else if (sims)
  65                                 status.append('$');
  66                         if (status.length() > 0)
  67                                 msg.setHeader("X-Status", status.toString());
  68                         else
  69                                 msg.removeHeader("X-Status");
  70
  71                         String[] userFlags = flags.getUserFlags();
  72                         if (userFlags.length > 0) {
  73                                 status.setLength(0);
  74                                 for (int i = 0; i < userFlags.length; i++)
  75                                         status.append(userFlags[i]).append(' ');
  76                                 status.setLength(status.length() - 1); // smash trailing space
  77                                 msg.setHeader("X-Keywords", status.toString());
  78                         }
  79                         if (flags.contains(Flags.Flag.DELETED)) {
  80                                 s = msg.getHeader("X-Dt-Delete-Time", null);
  81                                 if (s == null)
  82                                         // XXX - should be time
  83                                         msg.setHeader("X-Dt-Delete-Time", "1");
  84                         }
  85                 } catch (MessagingException e) {
  86                         // ignore it
  87                 }
  88         }
  89
  90     protected static String getUnixFrom(MimeMessage msg) {
  91         Address[] afrom;
  92         String from;
  93         Date ddate;
  94         String date;
  95         try {
  96             if ((afrom = msg.getFrom()) == null ||
  97                     !(afrom[0] instanceof InternetAddress) ||
  98                     (from = ((InternetAddress)afrom[0]).getAddress()) == null)
  99                 from = "UNKNOWN";
 100             if ((ddate = msg.getReceivedDate()) == null ||
 101                     (ddate = msg.getSentDate()) == null)
 102                 ddate = new Date();
 103         } catch (MessagingException e) {
 104             from = "UNKNOWN";
 105             ddate = new Date();
 106         }
 107         date = ddate.toString();
 108         // date is of the form "Sat Aug 12 02:30:00 PDT 1995"
 109         // need to strip out the timezone
 110         return "From " + from + " " +
 111                 date.substring(0, 20) + date.substring(24);
 112     }
 113
 114         /** Singleton. */
 115         private EmailUtils() {
 116         }
 117 }