make Mailer an interface

auth/pwdless/emails.go

@@ -0,0 +1,28 @@
+package pwdless
+
+import (
+	"os"
+	"time"
+
+	"github.com/dhax/go-base/email"
+)
+
+// ContentLoginToken defines content for login token email template.
+type ContentLoginToken struct {
+	Email  string
+	Name   string
+	URL    string
+	Token  string
+	Expiry time.Time
+}
+
+// LoginTokenEmail creates and sends a login token email with provided template content.
+func LoginTokenEmail(name, address string, content ContentLoginToken) email.Message {
+	return email.Message{
+		From:     email.NewEmail(os.Getenv("EMAIL_FROM_NAME"), os.Getenv("EMAIL_FROM_ADDRESS")),
+		To:       email.NewEmail(name, address),
+		Subject:  "Login Token",
+		Template: "loginToken",
+		Content:  content,
+	}
+}