migrate orion repo into monorepo structure

go/internal/utils/emails.go

@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"errors"
+	"net/mail"
+	"strings"
+)
+
+func NormalizeEmail(email string) (string, error) {
+	if email == "" {
+		return "", errors.New("email empty")
+	}
+
+	lower := strings.ToLower(email)
+	lower = strings.TrimSpace(lower)
+
+	parsed, err := mail.ParseAddress(lower)
+	if err != nil {
+		return "", err
+	}
+
+	return parsed.Address, nil
+}
+
+func IsValidEmail(email string) bool {
+	_, err := mail.ParseAddress(email)
+	return err == nil
+}