rename account data keys, rearrange code

bot/email.go

@@ -12,6 +12,15 @@ import (
 	"gitlab.com/etke.cc/postmoogle/utils"
 )
 
+// account data key
+const acMessagePrefix = "cc.etke.postmoogle.message"
+
+// event keys
+const (
+	eventMessageIDkey = "cc.etke.postmoogle.messageID"
+	eventInReplyToKey = "cc.etke.postmoogle.inReplyTo"
+)
+
 func email2content(email *utils.Email, cfg roomsettings, threadID id.EventID) *event.Content {
 	var text strings.Builder
 	if !cfg.NoSender() {
@@ -115,3 +124,31 @@ func (b *Bot) sendFiles(ctx context.Context, roomID id.RoomID, files []*utils.Fi
 		}
 	}
 }
+
+func (b *Bot) getThreadID(roomID id.RoomID, messageID string) id.EventID {
+	key := acMessagePrefix + "." + messageID
+	data := map[string]id.EventID{}
+	err := b.lp.GetClient().GetRoomAccountData(roomID, key, &data)
+	if err != nil {
+		if !strings.Contains(err.Error(), "M_NOT_FOUND") {
+			b.log.Error("cannot retrieve account data %s: %v", key, err)
+			return ""
+		}
+	}
+
+	return data["eventID"]
+}
+
+func (b *Bot) setThreadID(roomID id.RoomID, messageID string, eventID id.EventID) {
+	key := acMessagePrefix + "." + messageID
+	data := map[string]id.EventID{
+		"eventID": eventID,
+	}
+
+	err := b.lp.GetClient().SetRoomAccountData(roomID, key, data)
+	if err != nil {
+		if !strings.Contains(err.Error(), "M_NOT_FOUND") {
+			b.log.Error("cannot save account data %s: %v", key, err)
+		}
+	}
+}