add noop email sender

internal/email/noop.go

@@ -0,0 +1,57 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package email
+
+// NewNoopSender returns a no-op email sender that will just execute the given sendCallback
+// every time it would otherwise send an email.
+//
+// The 'data' parameter in the callback will be either a ConfirmData or a ResetData struct.
+//
+// Passing a nil function is also acceptable, in which case the send functions will just return nil.
+func NewNoopSender(sendCallback func (toAddress string, data interface{})) Sender {
+	return &noopSender{
+		sendCallback: sendCallback,
+	}
+}
+
+type noopSender struct {
+	sendCallback func (toAddress string, data interface{})
+}
+
+func (s *noopSender) SendConfirmEmail(toAddress string, data ConfirmData) error {
+	if s.sendCallback != nil {
+		s.sendCallback(toAddress, data)
+	}
+	return nil
+}
+
+func (s *noopSender) SendResetEmail(toAddress string, data ResetData) error {
+	if s.sendCallback != nil {
+		s.sendCallback(toAddress, data)
+	}
+	return nil
+}
+
+func (s *noopSender) ExecuteTemplate(templateName string, data interface{}) (string, error) {
+	return "", nil
+}
+
+func (s *noopSender) AssembleMessage(mailSubject string, mailBody string, mailTo string) []byte {
+	return []byte{}
+}