feat(invoice): add send route

internal/email/model.go

@@ -0,0 +1,17 @@
+package email
+
+import "io"
+
+type Mail struct {
+	To          []string
+	Cc          []string
+	Bcc         []string
+	Subject     string
+	Body        string
+	Attachments []Attachment
+}
+type Attachment struct {
+	Name     string
+	MimeType string
+	Content  io.Reader
+}

internal/email/resource.go

@@ -0,0 +1,52 @@
+package email
+
+import (
+	"crypto/tls"
+	"net/smtp"
+
+	"github.com/jordan-wright/email"
+)
+
+type Config struct {
+	SMTP SMTPConfig
+	From string
+}
+
+type SMTPConfig struct {
+	Host     string
+	Port     string
+	User     string
+	Password string
+}
+
+type Service struct {
+	from string
+	pool *email.Pool
+	cfg  Config
+}
+
+func New(cfg Config) (s *Service, err error) {
+	p, err := email.NewPool(
+		cfg.SMTP.Host+":"+cfg.SMTP.Port,
+		1,
+		smtp.PlainAuth(
+			"",
+			cfg.SMTP.User,
+			cfg.SMTP.Password,
+			cfg.SMTP.Host,
+		), &tls.Config{
+			InsecureSkipVerify: true,          // set false in production
+			ServerName:         cfg.SMTP.Host, // must match the SMTP host
+		})
+	if err != nil {
+		return
+	}
+
+	s = &Service{
+		from: cfg.From,
+		pool: p,
+		cfg:  cfg,
+	}
+
+	return
+}

internal/email/send.go

@@ -0,0 +1,34 @@
+package email
+
+import (
+	"crypto/tls"
+	"net/smtp"
+
+	"github.com/jordan-wright/email"
+)
+
+func (s Service) Send(m Mail) (err error) {
+	e := email.NewEmail()
+	e.To = m.To
+	e.Cc = m.Cc
+	e.Bcc = m.Bcc
+	e.From = s.from
+	e.Subject = m.Subject
+	e.Text = []byte(m.Body)
+
+	for _, a := range m.Attachments {
+		e.Attach(a.Content, a.Name, a.MimeType)
+	}
+	err = e.SendWithTLS(s.cfg.SMTP.Host+":"+s.cfg.SMTP.Port, smtp.PlainAuth(
+		s.cfg.SMTP.User,
+		s.cfg.SMTP.User,
+		s.cfg.SMTP.Password,
+		s.cfg.SMTP.Host,
+	), &tls.Config{
+		ServerName: s.cfg.SMTP.Host,
+	})
+
+	// err = s.pool.Send(e, time.Second*5)
+
+	return
+}