notmuch: add IndexFile and DeleteMessage methods to notmuch.DB

The new IndexFile and DeleteMessage allow dynamically inserting and
removing files to/from a notmuch database.

Signed-off-by: Julian Pidancet <julian.pidancet@oracle.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Acked-by: Tim Culverhouse <tim@timculverhouse.com>

worker/notmuch/lib/database.go

@@ -250,6 +250,35 @@ func (db *DB) MsgFilenames(key string) ([]string, error) {
 	return filenames, err
 }
 
+func (db *DB) DeleteMessage(filename string) error {
+	return db.withConnection(true, func(ndb *notmuch.DB) error {
+		err := ndb.RemoveMessage(filename)
+		if err != nil && !errors.Is(err, notmuch.ErrDuplicateMessageID) {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func (db *DB) IndexFile(filename string) (string, error) {
+	var key string
+
+	err := db.withConnection(true, func(ndb *notmuch.DB) error {
+		msg, err := ndb.AddMessage(filename)
+		if err != nil && !errors.Is(err, notmuch.ErrDuplicateMessageID) {
+			return err
+		}
+		defer msg.Close()
+		if err := msg.MaildirFlagsToTags(); err != nil {
+			return err
+		}
+		key = msg.ID()
+		return nil
+	})
+	return key, err
+}
+
 func (db *DB) msgModify(key string,
 	cb func(*notmuch.Message) error,
 ) error {