maildir: set the forwarded flag when forwarding msgs

The maildir backend was ignoring the passed/forwarded flag. Allow for
this flag to be set and synced to the server (if the server admits it).

Changelog-added: The maildir backend now honors the forwarded/passed
 flag.
Signed-off-by: inwit <inwit@sindominio.net>
Acked-by: Robin Jarry <robin@jarry.cc>

3 files changed, 36 insertions, 7 deletions

diff --git a/worker/lib/maildir.go b/worker/lib/maildir.go
index a4a0ecd5..aada524f 100644
--- a/worker/lib/maildir.go
+++ b/worker/lib/maildir.go
@@ -119,16 +119,16 @@ var MaildirToFlag = map[maildir.Flag]models.Flags{
 	maildir.FlagTrashed: models.DeletedFlag,
 	maildir.FlagFlagged: models.FlaggedFlag,
 	maildir.FlagDraft:   models.DraftFlag,
-	// maildir.FlagPassed Flag = 'P'
+	maildir.FlagPassed:  models.ForwardedFlag,
 }
 
 var FlagToMaildir = map[models.Flags]maildir.Flag{
-	models.AnsweredFlag: maildir.FlagReplied,
-	models.SeenFlag:     maildir.FlagSeen,
-	models.DeletedFlag:  maildir.FlagTrashed,
-	models.FlaggedFlag:  maildir.FlagFlagged,
-	models.DraftFlag:    maildir.FlagDraft,
-	// maildir.FlagPassed Flag = 'P'
+	models.AnsweredFlag:  maildir.FlagReplied,
+	models.SeenFlag:      maildir.FlagSeen,
+	models.DeletedFlag:   maildir.FlagTrashed,
+	models.FlaggedFlag:   maildir.FlagFlagged,
+	models.DraftFlag:     maildir.FlagDraft,
+	models.ForwardedFlag: maildir.FlagPassed,
 }
 
 func FromMaildirFlags(maildirFlags []maildir.Flag) models.Flags {
diff --git a/worker/maildir/message.go b/worker/maildir/message.go
index 6bc54cac..1d8d26b9 100644
--- a/worker/maildir/message.go
+++ b/worker/maildir/message.go
@@ -62,6 +62,12 @@ func (m Message) SetOneFlag(flag maildir.Flag, enable bool) error {
 	return m.SetFlags(newFlags)
 }
 
+// MarkForwarded either adds or removes the maildir.FlagForwarded flag
+// from the message.
+func (m Message) MarkForwarded(forwarded bool) error {
+	return m.SetOneFlag(maildir.FlagPassed, forwarded)
+}
+
 // MarkReplied either adds or removes the maildir.FlagReplied flag from the
 // message.
 func (m Message) MarkReplied(answered bool) error {
diff --git a/worker/maildir/worker.go b/worker/maildir/worker.go
index 7ff5093d..2c5bc893 100644
--- a/worker/maildir/worker.go
+++ b/worker/maildir/worker.go
@@ -317,6 +317,8 @@ func (w *Worker) handleMessage(msg types.WorkerMessage) error {
 		return w.handleFlagMessages(msg)
 	case *types.AnsweredMessages:
 		return w.handleAnsweredMessages(msg)
+	case *types.ForwardedMessages:
+		return w.handleForwardedMessages(msg)
 	case *types.CopyMessages:
 		return w.handleCopyMessages(msg)
 	case *types.MoveMessages:
@@ -782,6 +784,27 @@ func (w *Worker) handleAnsweredMessages(msg *types.AnsweredMessages) error {
 	return nil
 }
 
+func (w *Worker) handleForwardedMessages(msg *types.ForwardedMessages) error {
+	for _, uid := range msg.Uids {
+		m, err := w.c.Message(*w.selected, uid)
+		if err != nil {
+			w.worker.Errorf("could not get message: %v", err)
+			w.err(msg, err)
+			continue
+		}
+		if err := m.MarkForwarded(msg.Forwarded); err != nil {
+			w.worker.Errorf("could not mark message as answered: %v", err)
+			w.err(msg, err)
+			continue
+		}
+
+		w.worker.PostMessage(&types.DirectoryInfo{
+			Info: w.getDirectoryInfo(w.selectedName),
+		}, nil)
+	}
+	return nil
+}
+
 func (w *Worker) handleFlagMessages(msg *types.FlagMessages) error {
 	for _, uid := range msg.Uids {
 		m, err := w.c.Message(*w.selected, uid)