From c4498d812d2fc2a32cb991232064709b10a480f3 Mon Sep 17 00:00:00 2001
From: Derrick Hammer <derrick@derrickhammer.com>
Date: Thu, 18 Aug 2022 10:49:10 -0400
Subject: [PATCH] *Initial version

---
 LICENSE               |  2 +-
 package.json          |  6 ++++++
 src/index.ts          |  2 ++
 src/resolverModule.ts | 34 ++++++++++++++++++++++++++++++++++
 src/types.ts          | 31 +++++++++++++++++++++++++++++++
 src/util.ts           | 30 ++++++++++++++++++++++++++++++
 tsconfig.json         | 23 +++++++++++++++++++++++
 7 files changed, 127 insertions(+), 1 deletion(-)
 create mode 100644 package.json
 create mode 100644 src/index.ts
 create mode 100644 src/resolverModule.ts
 create mode 100644 src/types.ts
 create mode 100644 src/util.ts
 create mode 100644 tsconfig.json

diff --git a/LICENSE b/LICENSE
index 13a5b6e..f161a44 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Lume Web
+Copyright (c) 2022 Hammmer Technologies LLC
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..6d93821
--- /dev/null
+++ b/package.json
@@ -0,0 +1,6 @@
+{
+    "name": "@lumeweb/resolver-common",
+    "version": "0.1.0",
+    "description": "Common code and interfaces for the DNS resolver modules",
+    "main": "dist/index.js"
+}
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 0000000..3e7483c
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,2 @@
+export * from "./types.js";
+export * from "./resolverModule.js";
diff --git a/src/resolverModule.ts b/src/resolverModule.ts
new file mode 100644
index 0000000..1ba130a
--- /dev/null
+++ b/src/resolverModule.ts
@@ -0,0 +1,34 @@
+import type { DNSResult, ResolverOptions } from "./types.js";
+import { getTld } from "./util.js";
+
+export default interface ResolverModule {
+  constructor(resolver: any): void;
+
+  resolve(
+    domain: string,
+    options: ResolverOptions,
+    bypassCache: boolean
+  ): Promise<DNSResult>;
+}
+
+export abstract class AbstractResolverModule {
+  protected resolver: any;
+
+  constructor(resolver: any) {
+    this.resolver = resolver;
+  }
+
+  abstract resolve(
+    input: string,
+    options: ResolverOptions,
+    force: boolean
+  ): Promise<DNSResult>;
+
+  getSupportedTlds(): string[] {
+    return [];
+  }
+
+  isTldSupported(domain: string): boolean {
+    return this.getSupportedTlds().includes(getTld(domain));
+  }
+}
diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 0000000..fe22c90
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,31 @@
+export interface ResolverOptions {
+  type: any;
+  customType?: string;
+  records: any[];
+  options: any;
+}
+
+export interface DNSResult {
+  records: any[];
+  error?: Error;
+}
+
+export interface DNSRecord {
+  type: string;
+  customType?: string;
+  value: string;
+}
+
+const DNS_RECORD_TYPE = {
+  A: "A",
+  CNAME: "CNAME",
+  NS: "NS",
+  CONTENT: "CONTENT",
+  TEXT: "TEXT",
+  ALL: "ALL",
+  CUSTOM: "CUSTOM",
+};
+
+Object.freeze(DNS_RECORD_TYPE);
+
+export { DNS_RECORD_TYPE };
diff --git a/src/util.ts b/src/util.ts
new file mode 100644
index 0000000..e9e55d9
--- /dev/null
+++ b/src/util.ts
@@ -0,0 +1,30 @@
+export function getTld(domain: string): string {
+  if (domain.includes(".")) {
+    domain = domain.split(".")[domain.split(".").length - 1];
+  }
+
+  return domain;
+}
+
+export function getSld(domain: string): string {
+  if (domain.includes(".")) {
+    domain = domain
+      .split(".")
+      .slice(0, domain.split(".").length - 1)
+      .join(".");
+  }
+
+  return domain;
+}
+
+export function isIp(ip: string) {
+  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(
+    ip
+  );
+}
+
+export function isDomain(domain: string) {
+  return /(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9][a-z0-9-]{0,61}[a-z0-9]/.test(
+    domain
+  );
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..b2f765c
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "declaration": true,
+        "strict": true,
+        "module": "esnext",
+        "target": "esnext",
+        "esModuleInterop": true,
+        "sourceMap": false,
+        "rootDir": "src",
+        "outDir": "dist",
+        "typeRoots": [
+            "node_modules/@types"
+        ],
+        "moduleResolution": "node",
+        "declarationMap": true,
+        "declarationDir": "dist",
+        "emitDeclarationOnly": false,
+        "allowJs": true
+    },
+    "include": [
+        "src"
+    ]
+}