changes:

- added unit tests
    - put all subcmds into one file
    - use io.Writer for output, better for testing
    - added upload form support
    - added api docs
    - generalized db engine
    - added mail notify support for forms
    - enhanced server/SetupAuthStore() to also look up form ids
    - added form template (put into .go file by Makefile
    - renamed project

api/mail.go

@@ -0,0 +1,54 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+package api
+
+import (
+	"fmt"
+	"github.com/tlinden/ephemerup/cfg"
+	"net/smtp"
+)
+
+var mailtpl string = `To: %s\r
+From: %s\r
+Subject: %s\r
+\r
+%s\r
+`
+
+/*
+   Send  an  email  via  an   external  mail  gateway.  SMTP  Auth  is
+   required. Errors may occur with  a time delay, like server timeouts
+   etc. So only call it detached via go routine.
+*/
+func Sendmail(c *cfg.Config, recipient string, body string, subject string) error {
+	// Message.
+	message := []byte(fmt.Sprintf(mailtpl, recipient, c.Mail.From, subject, body))
+
+	// Authentication.
+	auth := smtp.PlainAuth("", c.Mail.From, c.Mail.Password, c.Mail.Server)
+
+	// Sending email.
+	Log("Trying to send mail to %s via %s:%s with subject %s",
+		recipient, c.Mail.Server, c.Mail.Port, subject)
+	err := smtp.SendMail(c.Mail.Server+":"+c.Mail.Port, auth, c.Mail.From, []string{recipient}, []byte(message))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}