Use []uint32 instead of imap.SeqSet

A sequence-set is an IMAP-specific implementation detail. Throughout the
UI, aerc simply operates using lists of opaque identifiers. In order to
loosen the coupling between the UI and IMAP in particular, replace most
usages of imap.SeqSet with []uint32, leaving the translation to a SeqSet
to the IMAP backend as needed.

5 files changed, 30 insertions, 16 deletions

diff --git a/worker/imap/fetch.go b/worker/imap/fetch.go
index d5bb9aa..fe25977 100644
--- a/worker/imap/fetch.go
+++ b/worker/imap/fetch.go
@@ -31,8 +31,7 @@ func (imapw *IMAPWorker) handleFetchMessageHeaders(
 		imap.FetchUid,
 		section.FetchItem(),
 	}
-
-	imapw.handleFetchMessages(msg, &msg.Uids, items, section)
+	imapw.handleFetchMessages(msg, msg.Uids, items, section)
 }
 
 func (imapw *IMAPWorker) handleFetchMessageBodyPart(
@@ -46,9 +45,7 @@ func (imapw *IMAPWorker) handleFetchMessageBodyPart(
 		imap.FetchUid,
 		section.FetchItem(),
 	}
-	uids := imap.SeqSet{}
-	uids.AddNum(msg.Uid)
-	imapw.handleFetchMessages(msg, &uids, items, section)
+	imapw.handleFetchMessages(msg, []uint32{msg.Uid}, items, section)
 }
 
 func (imapw *IMAPWorker) handleFetchFullMessages(
@@ -61,11 +58,11 @@ func (imapw *IMAPWorker) handleFetchFullMessages(
 		imap.FetchUid,
 		section.FetchItem(),
 	}
-	imapw.handleFetchMessages(msg, &msg.Uids, items, section)
+	imapw.handleFetchMessages(msg, msg.Uids, items, section)
 }
 
 func (imapw *IMAPWorker) handleFetchMessages(
-	msg types.WorkerMessage, uids *imap.SeqSet, items []imap.FetchItem,
+	msg types.WorkerMessage, uids []uint32, items []imap.FetchItem,
 	section *imap.BodySectionName) {
 
 	messages := make(chan *imap.Message)
@@ -132,7 +129,8 @@ func (imapw *IMAPWorker) handleFetchMessages(
 		done <- nil
 	}()
 
-	if err := imapw.client.UidFetch(uids, items, messages); err != nil {
+	set := toSeqSet(uids)
+	if err := imapw.client.UidFetch(set, items, messages); err != nil {
 		imapw.worker.PostMessage(&types.Error{
 			Message: types.RespondTo(msg),
 			Error:   err,
diff --git a/worker/imap/flags.go b/worker/imap/flags.go
index 0122d8e..57211a6 100644
--- a/worker/imap/flags.go
+++ b/worker/imap/flags.go
@@ -9,7 +9,8 @@ import (
 func (imapw *IMAPWorker) handleDeleteMessages(msg *types.DeleteMessages) {
 	item := imap.FormatFlagsOp(imap.AddFlags, true)
 	flags := []interface{}{imap.DeletedFlag}
-	if err := imapw.client.UidStore(&msg.Uids, item, flags, nil); err != nil {
+	uids := toSeqSet(msg.Uids)
+	if err := imapw.client.UidStore(uids, item, flags, nil); err != nil {
 		imapw.worker.PostMessage(&types.Error{
 			Message: types.RespondTo(msg),
 			Error:   err,
@@ -49,7 +50,8 @@ func (imapw *IMAPWorker) handleReadMessages(msg *types.ReadMessages) {
 		item = imap.FormatFlagsOp(imap.RemoveFlags, true)
 		flags = []interface{}{imap.SeenFlag}
 	}
-	if err := imapw.client.UidStore(&msg.Uids, item, flags, nil); err != nil {
+	uids := toSeqSet(msg.Uids)
+	if err := imapw.client.UidStore(uids, item, flags, nil); err != nil {
 		imapw.worker.PostMessage(&types.Error{
 			Message: types.RespondTo(msg),
 			Error:   err,
diff --git a/worker/imap/imap.go b/worker/imap/imap.go
new file mode 100644
index 0000000..28bac93
--- /dev/null
+++ b/worker/imap/imap.go
@@ -0,0 +1,13 @@
+package imap
+
+import (
+	"github.com/emersion/go-imap"
+)
+
+func toSeqSet(uids []uint32) *imap.SeqSet {
+	var set imap.SeqSet
+	for _, uid := range uids {
+		set.AddNum(uid)
+	}
+	return &set
+}
diff --git a/worker/imap/movecopy.go b/worker/imap/movecopy.go
index 6cf3fe1..b01dab7 100644
--- a/worker/imap/movecopy.go
+++ b/worker/imap/movecopy.go
@@ -7,7 +7,8 @@ import (
 )
 
 func (imapw *IMAPWorker) handleCopyMessages(msg *types.CopyMessages) {
-	if err := imapw.client.UidCopy(&msg.Uids, msg.Destination); err != nil {
+	uids := toSeqSet(msg.Uids)
+	if err := imapw.client.UidCopy(uids, msg.Destination); err != nil {
 		imapw.worker.PostMessage(&types.Error{
 			Message: types.RespondTo(msg),
 			Error:   err,
diff --git a/worker/types/messages.go b/worker/types/messages.go
index 7eac896..3d2bd05 100644
--- a/worker/types/messages.go
+++ b/worker/types/messages.go
@@ -94,12 +94,12 @@ type CreateDirectory struct {
 
 type FetchMessageHeaders struct {
 	Message
-	Uids imap.SeqSet
+	Uids []uint32
 }
 
 type FetchFullMessages struct {
 	Message
-	Uids imap.SeqSet
+	Uids []uint32
 }
 
 type FetchMessageBodyPart struct {
@@ -110,20 +110,20 @@ type FetchMessageBodyPart struct {
 
 type DeleteMessages struct {
 	Message
-	Uids imap.SeqSet
+	Uids []uint32
 }
 
 // Marks messages as read or unread
 type ReadMessages struct {
 	Message
 	Read bool
-	Uids imap.SeqSet
+	Uids []uint32
 }
 
 type CopyMessages struct {
 	Message
 	Destination string
-	Uids        imap.SeqSet
+	Uids        []uint32
 }
 
 type AppendMessage struct {