Add email service for sending emails

models/email.go

@@ -0,0 +1,56 @@
+package models
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/go-mail/mail/v2"
+)
+
+var (
+	defaultSender = os.Getenv("LENSLOCKED_EMAIL_FROM")
+)
+
+type Email struct {
+	To      string
+	Subject string
+	Text    string
+	Html    string
+}
+
+type EmailService struct {
+	DefaultSender string
+
+	dialer *mail.Dialer
+}
+
+func NewEmailService(host string, port int, username, pass, sender string) *EmailService {
+	es := EmailService{
+		dialer:        mail.NewDialer(host, port, username, pass),
+		DefaultSender: sender,
+	}
+	return &es
+}
+
+func (es *EmailService) Send(email Email) error {
+	msg := mail.NewMessage()
+
+	msg.SetHeader("To", email.To)
+	msg.SetHeader("From", es.DefaultSender)
+	msg.SetHeader("Subject", email.Subject)
+
+	if email.Html != "" && email.Text != "" {
+		msg.SetBody("text/plain", email.Text)
+		msg.AddAlternative("text/html", email.Html)
+	} else if email.Text != "" {
+		msg.SetBody("text/plain", email.Text)
+	} else if email.Html != "" {
+		msg.SetBody("text/html", email.Html)
+	}
+
+	err := es.dialer.DialAndSend(msg)
+	if err != nil {
+		return fmt.Errorf("send: %w", err)
+	}
+	return nil
+}