Add test mail command (#571)

Add test mail command

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: vikunja/api#571

pkg/cmd/testmail.go

@@ -0,0 +1,42 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-2020 Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	"code.vikunja.io/api/pkg/log"
+	"code.vikunja.io/api/pkg/mail"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(testmailCmd)
+}
+
+var testmailCmd = &cobra.Command{
+	Use:   "testmail [email]",
+	Short: "Send a test mail using the configured smtp connection",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		log.Info("Sending testmail...")
+		email := args[0]
+		if err := mail.SendTestMail(email); err != nil {
+			log.Errorf("Error sending test mail: %s", err.Error())
+			return
+		}
+		log.Info("Testmail successfully sent.")
+	},
+}

pkg/mail/mail.go

@@ -27,6 +27,16 @@ import (
 // Queue is the mail queue
 var Queue chan *gomail.Message
 
+func getDialer() *gomail.Dialer {
+	d := gomail.NewDialer(config.MailerHost.GetString(), config.MailerPort.GetInt(), config.MailerUsername.GetString(), config.MailerPassword.GetString())
+	// #nosec
+	d.TLSConfig = &tls.Config{
+		InsecureSkipVerify: config.MailerSkipTLSVerify.GetBool(),
+		ServerName:         config.MailerHost.GetString(),
+	}
+	return d
+}
+
 // StartMailDaemon starts the mail daemon
 func StartMailDaemon() {
 	Queue = make(chan *gomail.Message, config.MailerQueuelength.GetInt())
@@ -41,9 +51,7 @@ func StartMailDaemon() {
 	}
 
 	go func() {
-		d := gomail.NewDialer(config.MailerHost.GetString(), config.MailerPort.GetInt(), config.MailerUsername.GetString(), config.MailerPassword.GetString())
-		// #nosec
-		d.TLSConfig = &tls.Config{InsecureSkipVerify: config.MailerSkipTLSVerify.GetBool()}
+		d := getDialer()
 
 		var s gomail.SendCloser
 		var err error

pkg/mail/send_mail.go

@@ -53,6 +53,30 @@ type header struct {
 	Content string
 }
 
+// SendTestMail sends a test mail to a receipient.
+// It works without a queue.
+func SendTestMail(to string) error {
+	if config.MailerHost.GetString() == "" {
+		log.Warning("Mailer seems to be not configured! Please see the config docs for more details.")
+		return nil
+	}
+
+	d := getDialer()
+	s, err := d.Dial()
+	if err != nil {
+		return err
+	}
+	defer s.Close()
+
+	m := gomail.NewMessage()
+	m.SetHeader("From", config.MailerFromEmail.GetString())
+	m.SetHeader("To", to)
+	m.SetHeader("Subject", "Test from Vikunja")
+	m.SetBody("text/plain", "This is a test mail! If you got this, Vikunja is correctly set up to send emails.")
+
+	return gomail.Send(s, m)
+}
+
 // SendMail puts a mail in the queue
 func SendMail(opts *Opts) {
 	m := gomail.NewMessage()