feat(init): First commit

pkg/utils/domain.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	"fmt"
+	"strings"
+)
+
+func GetZone(domain string) (string, error) {
+	splt := strings.Split(domain, ".")
+	if len(splt) == 1 {
+		return "", fmt.Errorf("invalid domain %s", domain)
+	}
+
+	if len(splt) == 2 {
+		return domain, nil
+	}
+
+	return splt[len(splt)-2] + "." + splt[len(splt)-1], nil
+}
+
+func GetSubdomain(domain string) (string, error) {
+	top, err := GetZone(domain)
+	if err != nil {
+		return "", err
+	}
+
+	sub := strings.TrimSuffix(domain, top)
+	return strings.TrimSuffix(sub, "."), nil
+}