Mark sent messages as "seen" in maildir

- Add maildir flags to complement a messages imap flags
- Set the "seen" flag on sent messages when using the maildir backend
- Cleanup AppendMessage interface to use models.Flag for both IMAP and
  maildir

worker/imap/fetch.go

@@ -91,7 +91,7 @@ func (imapw *IMAPWorker) handleFetchMessages(
 					Info: &models.MessageInfo{
 						BodyStructure: translateBodyStructure(_msg.BodyStructure),
 						Envelope:      translateEnvelope(_msg.Envelope),
-						Flags:         translateFlags(_msg.Flags),
+						Flags:         translateImapFlags(_msg.Flags),
 						InternalDate:  _msg.InternalDate,
 						RFC822Headers: header,
 						Uid:           _msg.Uid,
@@ -115,7 +115,7 @@ func (imapw *IMAPWorker) handleFetchMessages(
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
 					Info: &models.MessageInfo{
-						Flags: translateFlags(_msg.Flags),
+						Flags: translateImapFlags(_msg.Flags),
 						Uid:   _msg.Uid,
 					},
 				}, nil)
@@ -136,7 +136,7 @@ func (imapw *IMAPWorker) handleFetchMessages(
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
 					Info: &models.MessageInfo{
-						Flags: translateFlags(_msg.Flags),
+						Flags: translateImapFlags(_msg.Flags),
 						Uid:   _msg.Uid,
 					},
 				}, nil)

worker/imap/imap.go

@@ -89,7 +89,7 @@ func translateAddresses(addrs []*imap.Address) []*models.Address {
 	return converted
 }
 
-var flagMap = map[string]models.Flag{
+var imapToFlag = map[string]models.Flag{
 	imap.SeenFlag:     models.SeenFlag,
 	imap.RecentFlag:   models.RecentFlag,
 	imap.AnsweredFlag: models.AnsweredFlag,
@@ -97,12 +97,30 @@ var flagMap = map[string]models.Flag{
 	imap.FlaggedFlag:  models.FlaggedFlag,
 }
 
-func translateFlags(imapFlags []string) []models.Flag {
+var flagToImap = map[models.Flag]string{
+	models.SeenFlag:     imap.SeenFlag,
+	models.RecentFlag:   imap.RecentFlag,
+	models.AnsweredFlag: imap.AnsweredFlag,
+	models.DeletedFlag:  imap.DeletedFlag,
+	models.FlaggedFlag:  imap.FlaggedFlag,
+}
+
+func translateImapFlags(imapFlags []string) []models.Flag {
 	var flags []models.Flag
 	for _, imapFlag := range imapFlags {
-		if flag, ok := flagMap[imapFlag]; ok {
+		if flag, ok := imapToFlag[imapFlag]; ok {
 			flags = append(flags, flag)
 		}
 	}
 	return flags
 }
+
+func translateFlags(flags []models.Flag) []string {
+	var imapFlags []string
+	for _, flag := range flags {
+		if imapFlag, ok := flagToImap[flag]; ok {
+			imapFlags = append(imapFlags, imapFlag)
+		}
+	}
+	return imapFlags
+}

worker/imap/movecopy.go

@@ -28,7 +28,7 @@ func (m appendLiteral) Len() int {
 }
 
 func (imapw *IMAPWorker) handleAppendMessage(msg *types.AppendMessage) {
-	if err := imapw.client.Append(msg.Destination, msg.Flags, msg.Date,
+	if err := imapw.client.Append(msg.Destination, translateFlags(msg.Flags), msg.Date,
 		&appendLiteral{
 			Reader: msg.Reader,
 			Length: msg.Length,

worker/imap/worker.go

@@ -222,7 +222,7 @@ func (w *IMAPWorker) handleImapUpdate(update client.Update) {
 			Info: &models.MessageInfo{
 				BodyStructure: translateBodyStructure(msg.BodyStructure),
 				Envelope:      translateEnvelope(msg.Envelope),
-				Flags:         translateFlags(msg.Flags),
+				Flags:         translateImapFlags(msg.Flags),
 				InternalDate:  msg.InternalDate,
 				Uid:           msg.Uid,
 			},

worker/maildir/message.go

@@ -45,7 +45,7 @@ func (m Message) ModelFlags() ([]models.Flag, error) {
 	if err != nil {
 		return nil, err
 	}
-	return translateFlags(flags), nil
+	return translateMaildirFlags(flags), nil
 }
 
 // SetFlags replaces the message's flags with a new set.
@@ -97,7 +97,7 @@ func (m Message) NewBodyPartReader(requestedParts []int) (io.Reader, error) {
 	return lib.FetchEntityPartReader(msg, requestedParts)
 }
 
-var flagMap = map[maildir.Flag]models.Flag{
+var maildirToFlag = map[maildir.Flag]models.Flag{
 	maildir.FlagReplied: models.AnsweredFlag,
 	maildir.FlagSeen:    models.SeenFlag,
 	maildir.FlagTrashed: models.DeletedFlag,
@@ -106,16 +106,35 @@ var flagMap = map[maildir.Flag]models.Flag{
 	// maildir.FlagPassed Flag = 'P'
 }
 
-func translateFlags(maildirFlags []maildir.Flag) []models.Flag {
+var flagToMaildir = map[models.Flag]maildir.Flag{
+	models.AnsweredFlag: maildir.FlagReplied,
+	models.SeenFlag:     maildir.FlagSeen,
+	models.DeletedFlag:  maildir.FlagTrashed,
+	models.FlaggedFlag:  maildir.FlagFlagged,
+	// maildir.FlagDraft Flag = 'D'
+	// maildir.FlagPassed Flag = 'P'
+}
+
+func translateMaildirFlags(maildirFlags []maildir.Flag) []models.Flag {
 	var flags []models.Flag
 	for _, maildirFlag := range maildirFlags {
-		if flag, ok := flagMap[maildirFlag]; ok {
+		if flag, ok := maildirToFlag[maildirFlag]; ok {
 			flags = append(flags, flag)
 		}
 	}
 	return flags
 }
 
+func translateFlags(flags []models.Flag) []maildir.Flag {
+	var maildirFlags []maildir.Flag
+	for _, flag := range flags {
+		if maildirFlag, ok := flagToMaildir[flag]; ok {
+			maildirFlags = append(maildirFlags, maildirFlag)
+		}
+	}
+	return maildirFlags
+}
+
 func (m Message) UID() uint32 {
 	return m.uid
 }

worker/maildir/worker.go

@@ -337,7 +337,7 @@ func (w *Worker) sort(uids []uint32, criteria []*types.SortCriterion) ([]uint32,
 
 func (w *Worker) handleCreateDirectory(msg *types.CreateDirectory) error {
 	dir := w.c.Dir(msg.Directory)
-	if err := dir.Create(); err != nil {
+	if err := dir.Init(); err != nil {
 		w.worker.Logger.Printf("could not create directory %s: %v",
 			msg.Directory, err)
 		return err
@@ -510,15 +510,16 @@ func (w *Worker) handleCopyMessages(msg *types.CopyMessages) error {
 }
 
 func (w *Worker) handleAppendMessage(msg *types.AppendMessage) error {
+	// since we are the "master" maildir process, we can modify the maildir directly
 	dest := w.c.Dir(msg.Destination)
-	delivery, err := dest.NewDelivery()
+	_, writer, err := dest.Create(translateFlags(msg.Flags))
 	if err != nil {
-		w.worker.Logger.Printf("could not deliver message to %s: %v",
+		w.worker.Logger.Printf("could not create message at %s: %v",
 			msg.Destination, err)
 		return err
 	}
-	defer delivery.Close()
-	if _, err := io.Copy(delivery, msg.Reader); err != nil {
+	defer writer.Close()
+	if _, err := io.Copy(writer, msg.Reader); err != nil {
 		w.worker.Logger.Printf("could not write message to destination: %v", err)
 		return err
 	}

worker/types/messages.go

@@ -131,7 +131,7 @@ type CopyMessages struct {
 type AppendMessage struct {
 	Message
 	Destination string
-	Flags       []string
+	Flags       []models.Flag
 	Date        time.Time
 	Reader      io.Reader
 	Length      int