70 lines
1.5 KiB
TypeScript
70 lines
1.5 KiB
TypeScript
import { DNSRecord, DNSResult } from "./types.js";
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export function getTld(domain: string): string {
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if (domain.includes(".")) {
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domain = domain.split(".")[domain.split(".").length - 1];
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}
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return domain;
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}
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export function getSld(domain: string): string {
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if (domain.includes(".")) {
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domain = domain
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.split(".")
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.slice(0, domain.split(".").length - 1)
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.join(".");
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}
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return domain;
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}
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export function isIp(ip: string) {
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return /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/.test(
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ip
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);
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}
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export function isDomain(domain: string) {
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return /(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9][a-z0-9-]{0,61}[a-z0-9]/.test(
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domain
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);
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}
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export function resolverEmptyResponse(): DNSResult {
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return {
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records: [],
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};
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}
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export function resolverError(e: Error | string): DNSResult {
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if (!(e instanceof Error)) {
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e = new Error(e);
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}
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return {
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records: [],
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error: e,
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};
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}
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export function resolveSuccess(records: DNSRecord[]): DNSResult {
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return {
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records,
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};
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}
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export function normalizeDomain(domain: string): string {
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return domain.replace(/^\.+|\.+$/g, "").replace(/^\/+|\/+$/g, "");
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}
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export function isPromise(obj: Promise<any>) {
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return (
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!!obj &&
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(typeof obj === "object" || typeof obj === "function") &&
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typeof obj.then === "function"
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);
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}
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export function ensureUniqueRecords(records: DNSRecord[]) {
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return [
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...new Set(records.map((item: DNSRecord) => JSON.stringify(item))),
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].map((item) => JSON.parse(item));
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}
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