package app

func transportAppendDNSRule(rawDNS map[string]any, rule map[string]any) {
	if rawDNS == nil || len(rule) == 0 {
		return
	}
	rawRules, _ := rawDNS["rules"].([]any)
	for _, it := range rawRules {
		existing, ok := it.(map[string]any)
		if !ok || existing == nil {
			continue
		}
		if mapsEqual(existing, rule) {
			return
		}
	}
	rawRules = append(rawRules, rule)
	rawDNS["rules"] = rawRules
}

func mapsEqual(a, b map[string]any) bool {
	if len(a) != len(b) {
		return false
	}
	for k, av := range a {
		bv, ok := b[k]
		if !ok {
			return false
		}
		if asString(av) != asString(bv) {
			return false
		}
	}
	return true
}