send: return error when recipients list is empty

Avoid sending messages with no recipients.

Fixes: https://todo.sr.ht/~rjarry/aerc/182
Signed-off-by: Robin Jarry <robin@jarry.cc>
Tested-by: Bence Ferdinandy <bence@ferdinandy.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/commands/compose/send.go b/commands/compose/send.go
index 7eeb124c..e53b01a3 100644
--- a/commands/compose/send.go
+++ b/commands/compose/send.go
@@ -79,6 +79,9 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
 	if err != nil {
 		return errors.Wrap(err, "listRecipients")
 	}
+	if len(rcpts) == 0 {
+		return errors.New("Cannot send message with no recipients")
+	}
 
 	uri, err := url.Parse(outgoing)
 	if err != nil {