prompt 4

internal/mailer/mailer.go

@@ -0,0 +1,19 @@
+package mailer
+
+import (
+	"context"
+
+	"trustcontact/internal/config"
+)
+
+type Mailer interface {
+	Send(ctx context.Context, to, subject, htmlBody, textBody string) error
+}
+
+func NewMailer(cfg *config.Config) (Mailer, error) {
+	if cfg.Env == config.EnvDevelop {
+		return NewSinkMailer(cfg.EmailSinkDir)
+	}
+
+	return NewSMTPMailer(cfg)
+}