Factor IMAP-specific structs out of UI models

Before, we were using several IMAP-specific concepts to represent
information being displayed in the UI. Factor these structures out of
the IMAP package to make it easier for other backends to provide the
required information.

3 files changed, 83 insertions, 8 deletions

diff --git a/worker/imap/fetch.go b/worker/imap/fetch.go
index fe25977..1745ead 100644
--- a/worker/imap/fetch.go
+++ b/worker/imap/fetch.go
@@ -82,9 +82,9 @@ func (imapw *IMAPWorker) handleFetchMessages(
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
 					Info: &models.MessageInfo{
-						BodyStructure: _msg.BodyStructure,
-						Envelope:      _msg.Envelope,
-						Flags:         _msg.Flags,
+						BodyStructure: translateBodyStructure(_msg.BodyStructure),
+						Envelope:      translateEnvelope(_msg.Envelope),
+						Flags:         translateFlags(_msg.Flags),
 						InternalDate:  _msg.InternalDate,
 						RFC822Headers: header,
 						Uid:           _msg.Uid,
@@ -103,7 +103,7 @@ func (imapw *IMAPWorker) handleFetchMessages(
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
 					Info: &models.MessageInfo{
-						Flags: _msg.Flags,
+						Flags: translateFlags(_msg.Flags),
 						Uid:   _msg.Uid,
 					},
 				}, nil)
@@ -120,7 +120,7 @@ func (imapw *IMAPWorker) handleFetchMessages(
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
 					Info: &models.MessageInfo{
-						Flags: _msg.Flags,
+						Flags: translateFlags(_msg.Flags),
 						Uid:   _msg.Uid,
 					},
 				}, nil)
diff --git a/worker/imap/imap.go b/worker/imap/imap.go
index 28bac93..06bcd00 100644
--- a/worker/imap/imap.go
+++ b/worker/imap/imap.go
@@ -2,6 +2,8 @@ package imap
 
 import (
 	"github.com/emersion/go-imap"
+
+	"git.sr.ht/~sircmpwn/aerc/models"
 )
 
 func toSeqSet(uids []uint32) *imap.SeqSet {
@@ -11,3 +13,76 @@ func toSeqSet(uids []uint32) *imap.SeqSet {
 	}
 	return &set
 }
+
+func translateBodyStructure(bs *imap.BodyStructure) *models.BodyStructure {
+	if bs == nil {
+		return nil
+	}
+	var parts []*models.BodyStructure
+	for _, part := range bs.Parts {
+		parts = append(parts, translateBodyStructure(part))
+	}
+	return &models.BodyStructure{
+		MIMEType:          bs.MIMEType,
+		MIMESubType:       bs.MIMESubType,
+		Params:            bs.Params,
+		Description:       bs.Description,
+		Encoding:          bs.Encoding,
+		Parts:             parts,
+		Disposition:       bs.Disposition,
+		DispositionParams: bs.DispositionParams,
+	}
+}
+
+func translateEnvelope(e *imap.Envelope) *models.Envelope {
+	if e == nil {
+		return nil
+	}
+	return &models.Envelope{
+		Date:      e.Date,
+		Subject:   e.Subject,
+		From:      translateAddresses(e.From),
+		ReplyTo:   translateAddresses(e.ReplyTo),
+		To:        translateAddresses(e.To),
+		Cc:        translateAddresses(e.Cc),
+		Bcc:       translateAddresses(e.Bcc),
+		MessageId: e.MessageId,
+	}
+}
+
+func translateAddress(a *imap.Address) *models.Address {
+	if a == nil {
+		return nil
+	}
+	return &models.Address{
+		Name:    a.PersonalName,
+		Mailbox: a.MailboxName,
+		Host:    a.HostName,
+	}
+}
+
+func translateAddresses(addrs []*imap.Address) []*models.Address {
+	var converted []*models.Address
+	for _, addr := range addrs {
+		converted = append(converted, translateAddress(addr))
+	}
+	return converted
+}
+
+var flagMap = map[string]models.Flag{
+	imap.SeenFlag:     models.SeenFlag,
+	imap.RecentFlag:   models.RecentFlag,
+	imap.AnsweredFlag: models.AnsweredFlag,
+	imap.DeletedFlag:  models.DeletedFlag,
+	imap.FlaggedFlag:  models.FlaggedFlag,
+}
+
+func translateFlags(imapFlags []string) []models.Flag {
+	var flags []models.Flag
+	for _, imapFlag := range imapFlags {
+		if flag, ok := flagMap[imapFlag]; ok {
+			flags = append(flags, flag)
+		}
+	}
+	return flags
+}
diff --git a/worker/imap/worker.go b/worker/imap/worker.go
index 9ddaa47..88f8b37 100644
--- a/worker/imap/worker.go
+++ b/worker/imap/worker.go
@@ -187,9 +187,9 @@ func (w *IMAPWorker) handleImapUpdate(update client.Update) {
 		}
 		w.worker.PostMessage(&types.MessageInfo{
 			Info: &models.MessageInfo{
-				BodyStructure: msg.BodyStructure,
-				Envelope:      msg.Envelope,
-				Flags:         msg.Flags,
+				BodyStructure: translateBodyStructure(msg.BodyStructure),
+				Envelope:      translateEnvelope(msg.Envelope),
+				Flags:         translateFlags(msg.Flags),
 				InternalDate:  msg.InternalDate,
 				Uid:           msg.Uid,
 			},