feat: new emails design

internal/infrastructure/mailer/mailRepository.go

@@ -22,6 +22,32 @@ func NewMailRepository(smtp config.SmtpSettings) *MailRepository {
 	return &MailRepository{smtp: smtp}
 }
 
+const defaultSubject = "RenewCMS | Action required"
+
+func (m MailRepository) Render(templateName string, data any) (string, string, error) {
+	subject := defaultSubject
+	switch templateName {
+	case "verification":
+		subject = "Verify your RenewCMS account"
+	case "password-reset":
+		subject = "Reset your RenewCMS password"
+	}
+
+	tmpl, err := template.ParseFS(mailTemplateFiles, "templates/"+templateName+".html")
+	if err != nil {
+		log.Println("error when template.ParseFS:", err)
+		return subject, "", err
+	}
+
+	var body bytes.Buffer
+	if err := tmpl.Execute(&body, data); err != nil {
+		log.Println("error when tmpl.Execute:", err)
+		return subject, "", err
+	}
+
+	return subject, body.String(), nil
+}
+
 func (m MailRepository) Send(receiverAddress string, templateName string, data any) error {
 	login := m.smtp.Login
 	sender := m.smtp.Sender
@@ -31,16 +57,8 @@ func (m MailRepository) Send(receiverAddress string, templateName string, data a
 
 	d := gomail.NewDialer(smtpHost, smtpPort, login, password)
 
-	tmpl, err := template.ParseFS(mailTemplateFiles, "templates/"+templateName+".html")
+	subject, body, err := m.Render(templateName, data)
 	if err != nil {
-		log.Println("error when template.ParseFS:", err)
-		return err
-	}
-
-	var body bytes.Buffer
-	err = tmpl.Execute(&body, data)
-	if err != nil {
-		log.Println("error when tmpl.Execute:", err)
 		return err
 	}
 
@@ -48,9 +66,9 @@ func (m MailRepository) Send(receiverAddress string, templateName string, data a
 	msg.SetHeaders(map[string][]string{
 		"From":    {"RenewCMS <" + sender + ">"},
 		"To":      {receiverAddress},
-		"Subject": {"RenewCMS | Action required"},
+		"Subject": {subject},
 	})
-	msg.SetBody("text/html", body.String())
+	msg.SetBody("text/html", body)
 
 	if err := d.DialAndSend(msg); err != nil {
 		log.Println("error when sending email:", err)