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 INBOX_UPPER_CASE = "INBOX";
  16         public final static String MESSAGE_ID = "Message-ID";
  17
  18         public static String getMessageId(Message msg) {
  19                 try {
  20                         return msg instanceof MimeMessage ? ((MimeMessage) msg).getMessageID() : "<N/A>";
  21                 } catch (MessagingException e) {
  22                         throw new IllegalStateException("Cannot extract message id from " + msg, e);
  23                 }
  24         }
  25
  26         public static String describe(Message msg) {
  27                 try {
  28                         return "Message " + msg.getMessageNumber() + " " + msg.getSentDate().toInstant() + " " + getMessageId(msg);
  29                 } catch (MessagingException e) {
  30                         throw new IllegalStateException("Cannot describe " + msg, e);
  31                 }
  32         }
  33
  34         static void setHeadersFromFlags(MimeMessage msg, Flags flags) {
  35                 try {
  36                         StringBuilder status = new StringBuilder();
  37                         if (flags.contains(Flags.Flag.SEEN))
  38                                 status.append('R');
  39                         if (!flags.contains(Flags.Flag.RECENT))
  40                                 status.append('O');
  41                         if (status.length() > 0)
  42                                 msg.setHeader("Status", status.toString());
  43                         else
  44                                 msg.removeHeader("Status");
  45
  46                         boolean sims = false;
  47                         String s = msg.getHeader("X-Status", null);
  48                         // is it a SIMS 2.0 format X-Status header?
  49                         sims = s != null && s.length() == 4 && s.indexOf('$') >= 0;
  50                         //status.setLength(0);
  51                         if (flags.contains(Flags.Flag.DELETED))
  52                                 status.append('D');
  53                         else if (sims)
  54                                 status.append('$');
  55                         if (flags.contains(Flags.Flag.FLAGGED))
  56                                 status.append('F');
  57                         else if (sims)
  58                                 status.append('$');
  59                         if (flags.contains(Flags.Flag.ANSWERED))
  60                                 status.append('A');
  61                         else if (sims)
  62                                 status.append('$');
  63                         if (flags.contains(Flags.Flag.DRAFT))
  64                                 status.append('T');
  65                         else if (sims)
  66                                 status.append('$');
  67                         if (status.length() > 0)
  68                                 msg.setHeader("X-Status", status.toString());
  69                         else
  70                                 msg.removeHeader("X-Status");
  71
  72                         String[] userFlags = flags.getUserFlags();
  73                         if (userFlags.length > 0) {
  74                                 status.setLength(0);
  75                                 for (int i = 0; i < userFlags.length; i++)
  76                                         status.append(userFlags[i]).append(' ');
  77                                 status.setLength(status.length() - 1); // smash trailing space
  78                                 msg.setHeader("X-Keywords", status.toString());
  79                         }
  80                         if (flags.contains(Flags.Flag.DELETED)) {
  81                                 s = msg.getHeader("X-Dt-Delete-Time", null);
  82                                 if (s == null)
  83                                         // XXX - should be time
  84                                         msg.setHeader("X-Dt-Delete-Time", "1");
  85                         }
  86                 } catch (MessagingException e) {
  87                         // ignore it
  88                 }
  89         }
  90
  91     protected static String getUnixFrom(MimeMessage msg) {
  92         Address[] afrom;
  93         String from;
  94         Date ddate;
  95         String date;
  96         try {
  97             if ((afrom = msg.getFrom()) == null ||
  98                     !(afrom[0] instanceof InternetAddress) ||
  99                     (from = ((InternetAddress)afrom[0]).getAddress()) == null)
 100                 from = "UNKNOWN";
 101             if ((ddate = msg.getReceivedDate()) == null ||
 102                     (ddate = msg.getSentDate()) == null)
 103                 ddate = new Date();
 104         } catch (MessagingException e) {
 105             from = "UNKNOWN";
 106             ddate = new Date();
 107         }
 108         date = ddate.toString();
 109         // date is of the form "Sat Aug 12 02:30:00 PDT 1995"
 110         // need to strip out the timezone
 111         return "From " + from + " " +
 112                 date.substring(0, 20) + date.substring(24);
 113     }
 114
 115         /** Singleton. */
 116         private EmailUtils() {
 117         }
 118 }