feat(invoice): add send route

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
+}