more verification email elaboration (#50, #51)

controller/verify.go

@@ -0,0 +1,41 @@
+package controller
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/openziti-test-kitchen/zrok/controller/email_ui"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"html/template"
+	"net/smtp"
+)
+
+type verificationEmail struct {
+	EmailAddress string
+	VerifyUrl    string
+}
+
+func sendVerificationEmail(emailAddress, token string, cfg *Config) error {
+	t, err := template.ParseFS(email_ui.FS, "verify.gohtml")
+	if err != nil {
+		return errors.Wrap(err, "error parsing email verification template")
+	}
+	buf := new(bytes.Buffer)
+	err = t.Execute(buf, &verificationEmail{
+		EmailAddress: emailAddress,
+		VerifyUrl:    cfg.Registration.RegistrationUrlTemplate + "/" + token,
+	})
+	if err != nil {
+		return errors.Wrap(err, "error executing email verification template")
+	}
+
+	auth := smtp.PlainAuth("", cfg.Email.Username, cfg.Email.Password, cfg.Email.Host)
+	to := []string{emailAddress}
+	err = smtp.SendMail(fmt.Sprintf("%v:%d", cfg.Email.Host, cfg.Email.Port), auth, cfg.Registration.EmailFrom, to, buf.Bytes())
+	if err != nil {
+		return errors.Wrap(err, "error sending email verification")
+	}
+
+	logrus.Infof("verification email sent to '%v'", emailAddress)
+	return nil
+}