move structs in right packages + impl sender service to build and send e-mail

services/sender.go

@@ -0,0 +1,39 @@
+package services
+
+import (
+	cfg "mailsrv/config"
+	"mailsrv/mail"
+
+	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
+	"net/smtp"
+)
+
+type Sender struct {
+	SMTPConfig cfg.SMTPConfig
+	logger     log.Logger
+	// fetch this directory to collect `.json` e-mail format
+	OutboxPath string
+}
+
+func NewSender(logger log.Logger, config cfg.SMTPConfig, outboxPath string) Sender {
+	logger = log.With(logger, "actor", "sender")
+	return Sender{
+		SMTPConfig: config,
+		logger:     logger,
+		OutboxPath: outboxPath,
+	}
+}
+
+func (s Sender) SendMail(email mail.Email) error {
+	auth := smtp.PlainAuth("", s.SMTPConfig.User, s.SMTPConfig.Password, s.SMTPConfig.Url)
+	s.logger.Log("action", "authentication succeed")
+
+	if err := smtp.SendMail(s.SMTPConfig.GetFullUrl(), auth, email.Sender, email.Receivers, email.Generate()); err != nil {
+		level.Error(s.logger).Log("msg", "error while sending email", "err", err)
+		return err
+	}
+
+	s.logger.Log("msg", "mail send successfully")
+	return nil
+}