♻️ refactor: split into testable modules, add test suite

.github/workflows/docker.yml

@@ -31,6 +31,7 @@ jobs:
         check:
           - typecheck
           - format
+          - test
 
     steps:
       - name: Checkout

bun.lock

@@ -11,6 +11,7 @@
         "winston": "3.19.0",
       },
       "devDependencies": {
+        "@types/bun": "^1.3.14",
         "@types/node": "^26.0.1",
         "@types/validator": "^13.15.10",
         "prettier": "^3.9.4",
@@ -25,6 +26,8 @@
 
     "@so-ric/colorspace": ["@so-ric/colorspace@1.1.6", "", { "dependencies": { "color": "^5.0.2", "text-hex": "1.0.x" } }, "sha512-/KiKkpHNOBgkFJwu9sh48LkHSMYGyuTcSFK/qMBdnOAlrRJzRSXAOFB5qwzaVQuDl8wAvHVMkaASQDReTahxuw=="],
 
+    "@types/bun": ["@types/bun@1.3.14", "", { "dependencies": { "bun-types": "1.3.14" } }, "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw=="],
+
     "@types/node": ["@types/node@26.0.1", "", { "dependencies": { "undici-types": "~8.3.0" } }, "sha512-fc3KiUoBt6kie0N9bIW3E47vZsuaMf0PM2AaUpLCLT0s/LvX1nxAim6Fc049cNxODPpGm6qRAuUOB86SkRuPQw=="],
 
     "@types/triple-beam": ["@types/triple-beam@1.3.5", "", {}, "sha512-6WaYesThRMCl19iryMYP7/x2OVgCtbIVflDGFpWnb9irXI3UjYE4AzmYuiUKY1AJstGijoY+MgUszMgRxIYTYw=="],
@@ -39,6 +42,8 @@
 
     "axios": ["axios@1.18.1", "", { "dependencies": { "follow-redirects": "^1.16.0", "form-data": "^4.0.5", "https-proxy-agent": "^5.0.1", "proxy-from-env": "^2.1.0" } }, "sha512-3nTvFlvpn9Zu/RkHUqtc7/+al4UpRW5az71ap5zccp6e8RAYEzhMTecX8Dz1wWDYrPpUoB1HAQEGEAEvUr7S9g=="],
 
+    "bun-types": ["bun-types@1.3.14", "", { "dependencies": { "@types/node": "*" } }, "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ=="],
+
     "call-bind-apply-helpers": ["call-bind-apply-helpers@1.0.2", "", { "dependencies": { "es-errors": "^1.3.0", "function-bind": "^1.1.2" } }, "sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ=="],
 
     "color": ["color@5.0.3", "", { "dependencies": { "color-convert": "^3.1.3", "color-string": "^2.1.3" } }, "sha512-ezmVcLR3xAVp8kYOm4GS45ZLLgIE6SPAFoduLr6hTDajwb3KZ2F46gulK3XpcwRFb5KKGCSezCBAY4Dw4HsyXA=="],

package.json

@@ -13,6 +13,7 @@
     "winston": "3.19.0"
   },
   "devDependencies": {
+    "@types/bun": "^1.3.14",
     "@types/node": "^26.0.1",
     "@types/validator": "^13.15.10",
     "prettier": "^3.9.4",
@@ -22,7 +23,8 @@
     "typecheck": "tsc --noEmit",
     "format": "prettier --check .",
     "format:fix": "prettier --write .",
-    "check": "bun run typecheck && bun run format",
+    "check": "bun run typecheck && bun run format && bun test",
+    "test": "bun test",
     "dev": "bun --watch src/index.ts",
     "start": "bun src/index.ts",
     "build": "bun run typecheck",

src/index.ts

@@ -1,7 +1,7 @@
-import App from "./providers/App";
+import App from "./providers/app";
 
 App.loadConfig();
 App.loadENV();
-App.loadDaemon();
+App.loadUpdater();
 
 export default App;

src/libs/cloudflare-api.test.ts

@@ -0,0 +1,102 @@
+import { beforeEach, describe, expect, mock, test } from "bun:test";
+
+const axiosGet = mock();
+const axiosPost = mock();
+const axiosPut = mock();
+
+mock.module("axios", () => ({
+  default: {
+    get: axiosGet,
+    post: axiosPost,
+    put: axiosPut,
+  },
+}));
+
+const { default: CloudflareAPI } = await import("./cloudflare-api");
+
+describe("CloudflareAPI", () => {
+  beforeEach(() => {
+    axiosGet.mockReset();
+    axiosPost.mockReset();
+    axiosPut.mockReset();
+  });
+
+  test("getRecord returns the result on success", async () => {
+    axiosGet.mockResolvedValue({ data: { success: true, result: [{ id: "record-1" }] } });
+
+    const api = new CloudflareAPI("token", "zone-id");
+    const result = await api.getRecord({ type: "A", name: "example.com" });
+
+    expect(result).toEqual([{ id: "record-1" }]);
+    expect(axiosGet).toHaveBeenCalledWith(
+      "https://api.cloudflare.com/client/v4/zones/zone-id/dns_records",
+      expect.objectContaining({
+        headers: expect.objectContaining({ Authorization: "Bearer token" }),
+      }),
+    );
+  });
+
+  test("getRecord throws when the API reports failure", async () => {
+    axiosGet.mockResolvedValue({ data: { success: false, errors: [{ message: "bad request" }] } });
+
+    const api = new CloudflareAPI("token", "zone-id");
+    await expect(api.getRecord({})).rejects.toThrow("Unable to fetch record: bad request");
+  });
+
+  test("createRecord posts the record payload and returns the result", async () => {
+    axiosPost.mockResolvedValue({ data: { success: true, result: { id: "new-record" } } });
+
+    const api = new CloudflareAPI("token", "zone-id");
+    const result = await api.createRecord({
+      type: "A",
+      name: "example.com",
+      content: "1.2.3.4",
+      ttl: 300,
+      proxied: false,
+    });
+
+    expect(result).toEqual({ id: "new-record" });
+    expect(axiosPost).toHaveBeenCalledWith(
+      "https://api.cloudflare.com/client/v4/zones/zone-id/dns_records",
+      expect.objectContaining({ type: "A", name: "example.com", content: "1.2.3.4" }),
+      expect.anything(),
+    );
+  });
+
+  test("createRecord throws when the API reports failure", async () => {
+    axiosPost.mockResolvedValue({ data: { success: false, errors: [{ message: "nope" }] } });
+
+    const api = new CloudflareAPI("token", "zone-id");
+    await expect(api.createRecord({ ttl: 300 })).rejects.toThrow("Unable to create record: nope");
+  });
+
+  test("updateRecord puts the record payload and returns the result", async () => {
+    axiosPut.mockResolvedValue({ data: { success: true, result: { id: "record-1" } } });
+
+    const api = new CloudflareAPI("token", "zone-id");
+    const result = await api.updateRecord({
+      record_id: "record-1",
+      type: "A",
+      name: "example.com",
+      content: "1.2.3.4",
+      ttl: 300,
+      proxied: false,
+    });
+
+    expect(result).toEqual({ id: "record-1" });
+    expect(axiosPut).toHaveBeenCalledWith(
+      "https://api.cloudflare.com/client/v4/zones/zone-id/dns_records/record-1",
+      expect.objectContaining({ type: "A", name: "example.com" }),
+      expect.anything(),
+    );
+  });
+
+  test("updateRecord throws when the API reports failure", async () => {
+    axiosPut.mockResolvedValue({ data: { success: false, errors: [{ message: "denied" }] } });
+
+    const api = new CloudflareAPI("token", "zone-id");
+    await expect(api.updateRecord({ record_id: "record-1", ttl: 300 })).rejects.toThrow(
+      "Unable to update record: denied",
+    );
+  });
+});

src/libs/cloudflare-api.ts

@@ -0,0 +1,122 @@
+import axios from "axios";
+
+export default class CloudflareAPI {
+  private readonly token: string;
+  private readonly zoneId: string;
+
+  constructor(token: string, zoneId: string) {
+    this.token = token;
+    this.zoneId = zoneId;
+  }
+
+  public async getRecord({
+    name,
+    type,
+    content,
+    proxied,
+    page,
+  }: {
+    name?: string;
+    type?: string;
+    content?: string;
+    proxied?: boolean;
+    page?: number;
+  }) {
+    const response = await axios.get(
+      `https://api.cloudflare.com/client/v4/zones/${this.zoneId}/dns_records`,
+      {
+        params: {
+          name,
+          type,
+          perPage: 5000,
+          content,
+          proxied,
+          page,
+        },
+        headers: {
+          Authorization: `Bearer ${this.token}`,
+          "Content-Type": "application/json",
+        },
+      },
+    );
+
+    if (response.data.success !== true)
+      throw new Error(`Unable to fetch record: ${response.data.errors[0].message}`);
+
+    return response.data.result;
+  }
+
+  public async createRecord({
+    name,
+    type,
+    content,
+    ttl,
+    proxied,
+  }: {
+    name?: string;
+    type?: string;
+    content?: string;
+    ttl: number;
+    proxied?: boolean;
+  }) {
+    const response = await axios.post(
+      `https://api.cloudflare.com/client/v4/zones/${this.zoneId}/dns_records`,
+      {
+        type,
+        name,
+        content,
+        ttl,
+        proxied,
+      },
+      {
+        headers: {
+          Authorization: `Bearer ${this.token}`,
+          "Content-Type": "application/json",
+        },
+      },
+    );
+
+    if (response.data.success !== true)
+      throw new Error(`Unable to create record: ${response.data.errors[0].message}`);
+
+    return response.data.result;
+  }
+
+  public async updateRecord({
+    record_id,
+    name,
+    type,
+    content,
+    ttl,
+    proxied,
+  }: {
+    record_id: string;
+    name?: string;
+    type?: string;
+    content?: string;
+    ttl: number;
+    proxied?: boolean;
+  }) {
+    const response = await axios.put(
+      `https://api.cloudflare.com/client/v4/zones/${this.zoneId}/dns_records/${record_id}`,
+      {
+        type,
+        name,
+        content,
+        ttl,
+        proxied,
+      },
+      {
+        headers: {
+          Authorization: `Bearer ${this.token}`,
+          "Content-Type": "application/json",
+        },
+      },
+    );
+
+    if (response.data.success !== true)
+      throw new Error(`Unable to update record: ${response.data.errors[0].message}`);
+
+    return response.data.result;
+  }
+}

src/libs/config-validation.test.ts

@@ -0,0 +1,118 @@
+import { describe, expect, test } from "bun:test";
+import {
+  arraysEqual,
+  isCloudflareConfig,
+  isEnviromentTokenPlaceholder,
+  isZoneConfig,
+  parseEnvironmentTokenPlaceholderName,
+} from "./config-validation";
+
+describe("arraysEqual", () => {
+  test("returns true for identical arrays", () => {
+    expect(arraysEqual(["a", "b"], ["a", "b"])).toBe(true);
+  });
+
+  test("returns false for different length arrays", () => {
+    expect(arraysEqual(["a"], ["a", "b"])).toBe(false);
+  });
+
+  test("returns false for different order", () => {
+    expect(arraysEqual(["a", "b"], ["b", "a"])).toBe(false);
+  });
+
+  test("returns false when either input is nullish", () => {
+    expect(arraysEqual(null, ["a"])).toBe(false);
+    expect(arraysEqual(["a"], undefined)).toBe(false);
+  });
+});
+
+describe("isEnviromentTokenPlaceholder", () => {
+  test("recognizes a well formed placeholder", () => {
+    expect(isEnviromentTokenPlaceholder("{ENV_TOKEN:MY_TOKEN}")).toBe(true);
+  });
+
+  test("rejects a plain string", () => {
+    expect(isEnviromentTokenPlaceholder("plain-token")).toBe(false);
+  });
+});
+
+describe("parseEnvironmentTokenPlaceholderName", () => {
+  test("extracts the env var name", () => {
+    expect(parseEnvironmentTokenPlaceholderName("{ENV_TOKEN:MY_TOKEN}")).toBe("MY_TOKEN");
+  });
+
+  test("returns null for a non-placeholder token", () => {
+    expect(parseEnvironmentTokenPlaceholderName("plain-token")).toBeNull();
+  });
+});
+
+describe("isZoneConfig", () => {
+  const validZone = {
+    id: "zone-id",
+    type: "A",
+    name: "example.com",
+    content: "{CURRENT_IPv4}",
+    ttl: 300,
+    proxied: true,
+  };
+
+  test("accepts a well formed zone config", () => {
+    expect(isZoneConfig(validZone)).toBe(true);
+  });
+
+  test("rejects a zone config missing a key", () => {
+    const { proxied, ...rest } = validZone;
+    expect(isZoneConfig(rest)).toBe(false);
+  });
+
+  test("rejects a zone config with wrong types", () => {
+    expect(isZoneConfig({ ...validZone, ttl: "300" })).toBe(false);
+  });
+});
+
+describe("isCloudflareConfig", () => {
+  const validConfig = {
+    token: "some-token",
+    updateInterval: 60,
+    zone: [
+      {
+        id: "zone-id",
+        type: "A",
+        name: "example.com",
+        content: "{CURRENT_IPv4}",
+        ttl: 300,
+        proxied: true,
+      },
+    ],
+  };
+
+  test("accepts a well formed config", () => {
+    expect(isCloudflareConfig(validConfig)).toBe(true);
+  });
+
+  test("rejects a config with an invalid zone", () => {
+    expect(isCloudflareConfig({ ...validConfig, zone: [{ id: "only-id" }] })).toBe(false);
+  });
+
+  test("rejects an env token placeholder whose variable is unset", () => {
+    delete process.env.MISSING_TOKEN_VAR;
+    const onMissing = () => {};
+    expect(
+      isCloudflareConfig({ ...validConfig, token: "{ENV_TOKEN:MISSING_TOKEN_VAR}" }, onMissing),
+    ).toBe(false);
+  });
+
+  test("accepts an env token placeholder whose variable is set", () => {
+    process.env.SET_TOKEN_VAR = "resolved-value";
+    expect(isCloudflareConfig({ ...validConfig, token: "{ENV_TOKEN:SET_TOKEN_VAR}" })).toBe(true);
+    delete process.env.SET_TOKEN_VAR;
+  });
+
+  test("invokes the onMissingEnvToken callback with the variable name", () => {
+    let received: string | undefined;
+    isCloudflareConfig({ ...validConfig, token: "{ENV_TOKEN:CALLBACK_VAR}" }, (name) => {
+      received = name;
+    });
+    expect(received).toBe("CALLBACK_VAR");
+  });
+});

src/libs/config-validation.ts

@@ -0,0 +1,89 @@
+export interface ZoneConfig {
+  id: string;
+  type: string;
+  name: string;
+  content: string;
+  ttl: number;
+  proxied: boolean;
+}
+
+export interface CloudflareConfig {
+  token: string;
+  updateInterval: number;
+  zone: Array<ZoneConfig>;
+}
+
+export function arraysEqual(a: any, b: any): boolean {
+  if (a === b) return true;
+  if (a == null || b == null) return false;
+  if (a.length !== b.length) return false;
+
+  for (var i = 0; i < a.length; ++i) {
+    if (a[i] !== b[i]) return false;
+  }
+  return true;
+}
+
+export function isEnviromentTokenPlaceholder(token: string): boolean {
+  return token.startsWith("{ENV_TOKEN:") && token.endsWith("}");
+}
+
+export function parseEnvironmentTokenPlaceholderName(token: string): string | null {
+  if (!isEnviromentTokenPlaceholder(token)) return null;
+  return token.split("{ENV_TOKEN:")[1].slice(0, -1);
+}
+
+export function isZoneConfig(object: any): object is ZoneConfig {
+  if (!arraysEqual(Object.keys(object), ["id", "type", "name", "content", "ttl", "proxied"]))
+    return false;
+
+  return (
+    object &&
+    object.id &&
+    typeof object.id == "string" &&
+    object.type &&
+    typeof object.type == "string" &&
+    object.name &&
+    typeof object.name == "string" &&
+    object.content &&
+    typeof object.content == "string" &&
+    object.ttl &&
+    typeof object.ttl == "number" &&
+    typeof object.proxied == "boolean"
+  );
+}
+
+export function isCloudflareConfig(
+  object: any,
+  onMissingEnvToken?: (envTokenName: string) => void,
+): object is CloudflareConfig {
+  if (!arraysEqual(Object.keys(object), ["token", "updateInterval", "zone"])) return false;
+
+  const res =
+    object &&
+    object.token &&
+    typeof object.token == "string" &&
+    object.updateInterval &&
+    typeof object.updateInterval == "number";
+
+  for (let zone of object.zone) {
+    if (!isZoneConfig(zone)) return false;
+  }
+
+  if (!res) return false;
+
+  const token = object.token as string;
+
+  // Process the env token
+  if (isEnviromentTokenPlaceholder(token)) {
+    const envTokenName = parseEnvironmentTokenPlaceholderName(token)!;
+    const envValue = process.env[envTokenName];
+
+    if (!envValue) {
+      onMissingEnvToken?.(envTokenName);
+      return false;
+    }
+  }
+
+  return true;
+}

src/libs/public-ip.test.ts

@@ -0,0 +1,47 @@
+import { beforeEach, describe, expect, mock, test } from "bun:test";
+
+const axiosGet = mock();
+
+mock.module("axios", () => ({
+  default: { get: axiosGet },
+}));
+
+const { getCurrentIPv4, getCurrentIPv6 } = await import("./public-ip");
+
+describe("getCurrentIPv4", () => {
+  beforeEach(() => axiosGet.mockReset());
+
+  test("returns the ip when a valid IPv4 address is returned", async () => {
+    axiosGet.mockResolvedValue({ data: { ip: "1.2.3.4" } });
+    expect(await getCurrentIPv4()).toBe("1.2.3.4");
+  });
+
+  test("throws when no ip is returned", async () => {
+    axiosGet.mockResolvedValue({ data: {} });
+    await expect(getCurrentIPv4()).rejects.toThrow("Unable to fetch ip address");
+  });
+
+  test("throws when the returned ip is not a valid IPv4 address", async () => {
+    axiosGet.mockResolvedValue({ data: { ip: "not-an-ip" } });
+    await expect(getCurrentIPv4()).rejects.toThrow("Invalid IP");
+  });
+});
+
+describe("getCurrentIPv6", () => {
+  beforeEach(() => axiosGet.mockReset());
+
+  test("returns the ip when a valid IPv6 address is returned", async () => {
+    axiosGet.mockResolvedValue({ data: { ip: "::1" } });
+    expect(await getCurrentIPv6()).toBe("::1");
+  });
+
+  test("returns null when the returned value is not a valid IPv6 address", async () => {
+    axiosGet.mockResolvedValue({ data: { ip: "1.2.3.4" } });
+    expect(await getCurrentIPv6()).toBeNull();
+  });
+
+  test("throws when no ip is returned", async () => {
+    axiosGet.mockResolvedValue({ data: {} });
+    await expect(getCurrentIPv6()).rejects.toThrow("Unable to fetch ip address");
+  });
+});

src/libs/public-ip.ts

@@ -0,0 +1,22 @@
+import axios from "axios";
+import validator from "validator";
+
+export async function getCurrentIPv4(): Promise<string> {
+  const response = await axios.get("https://api.ipify.org?format=json");
+
+  if (!response.data.ip) throw new Error("Unable to fetch ip address");
+
+  if (!validator.isIP(response.data.ip, 4)) throw new Error("Invalid IP");
+
+  return response.data.ip;
+}
+
+export async function getCurrentIPv6(): Promise<string | null> {
+  const response = await axios.get("https://api64.ipify.org/?format=json");
+
+  if (!response.data.ip) throw new Error("Unable to fetch ip address");
+
+  if (!validator.isIP(response.data.ip, 6)) return null;
+
+  return response.data.ip;
+}

src/providers/Configuration.ts

@@ -1,44 +0,0 @@
-import fs from "fs";
-import path from "path";
-
-const ConfigurationData: any = [];
-class Configuration {
-  public init(): void {
-    const dir = path.join(process.cwd(), "configs/");
-    if (!fs.existsSync(dir)) {
-      fs.mkdirSync(dir);
-    }
-    this.copyExampleIfNotExists("UpdaterConfig.json");
-
-    this.loadConfig("UpdaterConfig.json");
-  }
-
-  public loadConfig(configFileName: string): void {
-    const dir = path.join(process.cwd(), "configs/");
-    if (!fs.existsSync(path.join(dir, configFileName)))
-      throw new Error(`Config file ${configFileName} does not exist`);
-
-    const config = JSON.parse(fs.readFileSync(path.join(dir, configFileName)).toString());
-    ConfigurationData[configFileName.replace(/\.[^/.]+$/, "")] = config;
-  }
-
-  public getConfig(key?: string) {
-    if (!key) return ConfigurationData;
-    else {
-      if (ConfigurationData[key]) return ConfigurationData[key];
-      else throw new Error(`No configuration found for ${key}`);
-    }
-  }
-
-  private copyExampleIfNotExists(file: string): void {
-    const dir = path.join(process.cwd(), "configs/");
-    if (!fs.existsSync(path.join(dir, file))) {
-      fs.copyFileSync(
-        path.join(process.cwd(), "configs_example/", `${file.replace(".json", ".example.json")}`),
-        path.join(dir, file),
-      );
-    }
-  }
-}
-
-export default new Configuration();

src/providers/Daemon.ts

@@ -1,408 +0,0 @@
-import Logger from "../libs/Logger";
-import Environment from "./Environment";
-import Configuration from "./Configuration";
-
-import axios from "axios";
-import validator from "validator";
-
-interface CloudflareConfig {
-  token: string;
-  updateInterval: number;
-  zone: Array<ZoneConfig>;
-}
-
-interface ZoneConfig {
-  id: string;
-  type: string;
-  name: string;
-  content: string;
-  ttl: number;
-  proxied: boolean;
-}
-
-class Deamon {
-  private config: Array<CloudflareConfig> = [];
-
-  constructor() {}
-
-  public init(): void {
-    const _config = Configuration.getConfig("UpdaterConfig");
-    if (!_config) {
-      Logger.error("No configuration found");
-      return;
-    }
-
-    for (let cloudflareConfig of _config) {
-      if (!this.isCloudflareConfig(cloudflareConfig)) {
-        Logger.error(`Invalid configuration for cloudflare: ${JSON.stringify(cloudflareConfig)}`);
-        continue;
-      }
-
-      this.config.push(cloudflareConfig);
-    }
-
-    Logger.info(`Loaded ${this.config.length} cloudflare configs`);
-    this.start();
-  }
-
-  public start(): void {
-    Logger.info("Starting deamon");
-    for (const cloudflareConfig of this.config) {
-      this.update(cloudflareConfig);
-      setInterval(() => this.update(cloudflareConfig), cloudflareConfig.updateInterval * 1000);
-    }
-  }
-
-  private async update(cloudflareConfig: CloudflareConfig) {
-    let token = cloudflareConfig.token;
-
-    // Replace placeholders env with value
-    if (this.isEnviromentTokenPlaceholder(token)) {
-      const envTokenName = this.parseEnvironmentTokenPlaceholderName(token)!;
-      if (process.env[envTokenName]) {
-        token = process.env[envTokenName]!;
-      } else {
-        Logger.error(`Environment variable ${envTokenName} not found`);
-        return;
-      }
-    }
-
-    let IPv4, IPv6;
-    try {
-      IPv4 = await this.getCurrentIPv4();
-      IPv6 = await this.getCurrentIPv6();
-    } catch (err) {
-      Logger.error(`Unable to fetch ip address: ${err}`);
-      return;
-    }
-
-    IPv4 && Logger.info(`Current IPv4 address: ${IPv4}`);
-    IPv6 && Logger.info(`Current IPv6 address: ${IPv6}`);
-
-    for (const zone of cloudflareConfig.zone) {
-      const api = new CloudflareAPI(token, zone.id);
-      const records = await api
-        .getRecord({
-          type: zone.type,
-          name: zone.name,
-        })
-        .catch((err) => {
-          Logger.error(`Unable to get records for zone ${zone.id}`);
-          return err;
-        });
-
-      if (records instanceof Error) {
-        continue;
-      }
-
-      // No records found, create it
-      if (!records || records.length === 0) {
-        const newContent = zone.content
-          .replaceAll("{CURRENT_IPv4}", IPv4)
-          .replaceAll("{CURRENT_IPv6}", IPv6);
-
-        const result = await api
-          .createRecord({
-            type: zone.type,
-            name: zone.name,
-            content: IPv4,
-            ttl: zone.ttl,
-            proxied: zone.proxied,
-          })
-          .catch((err) => {
-            Logger.error(`Unable to create record: ${err.message}`);
-            return err;
-          });
-
-        if (records instanceof Error) {
-          continue;
-        }
-
-        if (result) Logger.info(`Created [${zone.type}] (${zone.name} -> ${newContent})`);
-      }
-
-      // Only 1 matching records found
-      else if (records.length === 1) {
-        const record = records[0];
-        const newContent = zone.content
-          .replaceAll("{CURRENT_IPv4}", IPv4)
-          .replaceAll("{CURRENT_IPv6}", IPv6);
-
-        // Check if the ip is the same
-        if (record.content !== IPv4 && record.content !== IPv6) {
-          const updateResult = await api
-            .updateRecord({
-              record_id: record.id,
-              type: zone.type,
-              name: zone.name,
-              ttl: zone.ttl,
-              content: newContent,
-              proxied: zone.proxied,
-            })
-            .catch((err) => {
-              Logger.error(`Unable to update record: ${err.message}`);
-              return err;
-            });
-
-          if (records instanceof Error) {
-            continue;
-          }
-
-          if (updateResult)
-            Logger.info(
-              `[${zone.type}] (${zone.name} -> ${record.content}) updated to (${zone.name} -> ${newContent})`,
-            );
-        } else if (record.ttl !== zone.ttl || record.proxied !== zone.proxied) {
-          const updateResult = await api
-            .updateRecord({
-              record_id: record.id,
-              type: zone.type,
-              name: zone.name,
-              ttl: zone.ttl,
-              content: newContent,
-              proxied: zone.proxied,
-            })
-            .catch((err) => {
-              Logger.error(`Unable to update record: ${err.message}`);
-              console.log(err);
-              return;
-            });
-
-          if (updateResult)
-            Logger.info(
-              `[${zone.type}] (${zone.name} -> ${record.content}) updated proxy status/ttl (TTL: ${record.ttl} -> ${zone.ttl}) (Proxy status: ${record.proxied} -> ${zone.proxied})`,
-            );
-        } else {
-          Logger.info(`[${zone.type}] (${zone.name} -> ${record.content}) already up to date`);
-          continue;
-        }
-      }
-
-      // Many records found
-      else if (records.length > 1) {
-        Logger.error(
-          `Multiple records found for ${zone.type} (${zone.name}) (Multiple records are not supported right now)`,
-        );
-        continue;
-      }
-    }
-  }
-
-  private isCloudflareConfig(object: any): object is CloudflareConfig {
-    if (!this.arraysEqual(Object.keys(object), ["token", "updateInterval", "zone"])) return false;
-
-    const res =
-      object &&
-      object.token &&
-      typeof object.token == "string" &&
-      object.updateInterval &&
-      typeof object.updateInterval == "number";
-
-    for (let zone of object.zone) {
-      if (!this.isZoneConfig(zone)) return false;
-    }
-
-    if (!res) return false;
-
-    const token = object.token as string;
-
-    // Process the env token
-    if (this.isEnviromentTokenPlaceholder(token)) {
-      const envTokenName = this.parseEnvironmentTokenPlaceholderName(token)!;
-      const envValue = process.env[envTokenName];
-
-      if (!envValue) {
-        Logger.error(`Environment variable ${envTokenName} not found`);
-        return false;
-      }
-    }
-
-    return true;
-  }
-
-  private isZoneConfig(object: any): object is ZoneConfig {
-    if (!this.arraysEqual(Object.keys(object), ["id", "type", "name", "content", "ttl", "proxied"]))
-      return false;
-
-    const res =
-      object &&
-      object.id &&
-      typeof object.id == "string" &&
-      object.type &&
-      typeof object.type == "string" &&
-      object.name &&
-      typeof object.name == "string" &&
-      object.content &&
-      typeof object.content == "string" &&
-      object.ttl &&
-      typeof object.ttl == "number" &&
-      typeof object.proxied == "boolean";
-
-    if (!res) return false;
-
-    return true;
-  }
-
-  private isEnviromentTokenPlaceholder(token: string) {
-    return token.startsWith("{ENV_TOKEN:") && token.endsWith("}");
-  }
-
-  private parseEnvironmentTokenPlaceholderName(token: string) {
-    if (!this.isEnviromentTokenPlaceholder(token)) return null;
-    return token.split("{ENV_TOKEN:")[1].slice(0, -1);
-  }
-
-  private async getCurrentIPv4() {
-    const response = await axios.get("https://api.ipify.org?format=json");
-
-    if (!response.data.ip) throw new Error("Unable to fetch ip address");
-
-    if (!validator.isIP(response.data.ip, 4)) throw new Error("Invalid IP");
-
-    return response.data.ip;
-  }
-
-  private async getCurrentIPv6() {
-    const response = await axios.get("https://api64.ipify.org/?format=json");
-
-    if (!response.data.ip) throw new Error("Unable to fetch ip address");
-
-    if (!validator.isIP(response.data.ip, 6)) return null;
-
-    return response.data.ip;
-  }
-
-  private arraysEqual(a: any, b: any) {
-    if (a === b) return true;
-    if (a == null || b == null) return false;
-    if (a.length !== b.length) return false;
-
-    for (var i = 0; i < a.length; ++i) {
-      if (a[i] !== b[i]) return false;
-    }
-    return true;
-  }
-}
-
-class CloudflareAPI {
-  private token: string;
-  private zoneId: string;
-
-  constructor(token: string, zoneId: string) {
-    this.token = token;
-    this.zoneId = zoneId;
-  }
-
-  public async getRecord({
-    name,
-    type,
-    content,
-    proxied,
-    page,
-  }: {
-    name?: string;
-    type?: string;
-    content?: string;
-    proxied?: boolean;
-    page?: number;
-  }) {
-    const response = await axios.get(
-      `https://api.cloudflare.com/client/v4/zones/${this.zoneId}/dns_records`,
-      {
-        params: {
-          name,
-          type,
-          perPage: 5000,
-          content,
-          proxied,
-          page,
-        },
-        headers: {
-          Authorization: `Bearer ${this.token}`,
-          "Content-Type": "application/json",
-        },
-      },
-    );
-
-    if (response.data.success !== true)
-      throw new Error(`Unable to fetch record: ${response.data.errors[0].message}`);
-
-    return response.data.result;
-  }
-
-  public async createRecord({
-    name,
-    type,
-    content,
-    ttl,
-    proxied,
-  }: {
-    name?: string;
-    type?: string;
-    content?: string;
-    ttl: number;
-    proxied?: boolean;
-  }) {
-    const response = await axios.post(
-      `https://api.cloudflare.com/client/v4/zones/${this.zoneId}/dns_records`,
-      {
-        type,
-        name,
-        content,
-        ttl,
-        proxied,
-      },
-      {
-        headers: {
-          Authorization: `Bearer ${this.token}`,
-          "Content-Type": "application/json",
-        },
-      },
-    );
-
-    if (response.data.success !== true)
-      throw new Error(`Unable to create record: ${response.data.errors[0].message}`);
-
-    return response.data.result;
-  }
-
-  public async updateRecord({
-    record_id,
-    name,
-    type,
-    content,
-    ttl,
-    proxied,
-  }: {
-    record_id: string;
-    name?: string;
-    type?: string;
-    content?: string;
-    ttl: number;
-    proxied?: boolean;
-  }) {
-    const response = await axios.put(
-      `https://api.cloudflare.com/client/v4/zones/${this.zoneId}/dns_records/${record_id}`,
-      {
-        type,
-        name,
-        content,
-        ttl,
-        proxied,
-      },
-      {
-        headers: {
-          Authorization: `Bearer ${this.token}`,
-          "Content-Type": "application/json",
-        },
-      },
-    );
-
-    if (response.data.success !== true)
-      throw new Error(`Unable to update record: ${response.data.errors[0].message}`);
-
-    return response.data.result;
-  }
-}
-
-export default new Deamon();

src/providers/app.ts

@@ -1,8 +1,8 @@
-import Logger from "../libs/Logger";
+import Logger from "../libs/logger";
 
-import Environment from "./Environment";
-import Configuration from "./Configuration";
-import Daemon from "./Daemon";
+import Environment from "./environment";
+import Configuration from "./configuration";
+import Updater from "./updater";
 
 class App {
   public loadConfig(): void {
@@ -14,9 +14,9 @@ class App {
     Logger.log("info", "Loading environment");
     Environment.init();
   }
-  public loadDaemon(): void {
-    Logger.log("info", "Loading daemon");
-    Daemon.init();
+  public loadUpdater(): void {
+    Logger.log("info", "Loading updater");
+    Updater.init();
   }
 }
 

src/providers/configuration.test.ts

@@ -0,0 +1,65 @@
+import { afterEach, beforeEach, describe, expect, test } from "bun:test";
+import fs from "fs";
+import os from "os";
+import path from "path";
+
+describe("Configuration", () => {
+  let tmpDir: string;
+  let originalCwd: string;
+
+  beforeEach(() => {
+    originalCwd = process.cwd();
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "ddns-config-test-"));
+    fs.mkdirSync(path.join(tmpDir, "configs_example"), { recursive: true });
+    fs.writeFileSync(
+      path.join(tmpDir, "configs_example", "UpdaterConfig.example.json"),
+      JSON.stringify([{ token: "example-token", updateInterval: 60, zone: [] }]),
+    );
+    process.chdir(tmpDir);
+  });
+
+  afterEach(() => {
+    process.chdir(originalCwd);
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  test("copies the example config and loads it on init", async () => {
+    const { default: Configuration } = await import(`./configuration?t=${Date.now()}-1`);
+
+    Configuration.init();
+
+    expect(Configuration.getConfig("UpdaterConfig")).toEqual([
+      { token: "example-token", updateInterval: 60, zone: [] },
+    ]);
+  });
+
+  test("does not overwrite an existing config file", async () => {
+    fs.mkdirSync(path.join(tmpDir, "configs"), { recursive: true });
+    fs.writeFileSync(
+      path.join(tmpDir, "configs", "UpdaterConfig.json"),
+      JSON.stringify([{ token: "custom-token", updateInterval: 30, zone: [] }]),
+    );
+
+    const { default: Configuration } = await import(`./configuration?t=${Date.now()}-2`);
+    Configuration.init();
+
+    expect(Configuration.getConfig("UpdaterConfig")).toEqual([
+      { token: "custom-token", updateInterval: 30, zone: [] },
+    ]);
+  });
+
+  test("getConfig throws for an unknown key", async () => {
+    const { default: Configuration } = await import(`./configuration?t=${Date.now()}-3`);
+    Configuration.init();
+
+    expect(() => Configuration.getConfig("Unknown")).toThrow("No configuration found for Unknown");
+  });
+
+  test("loadConfig throws when the file does not exist", async () => {
+    const { default: Configuration } = await import(`./configuration?t=${Date.now()}-4`);
+
+    expect(() => Configuration.loadConfig("Missing.json")).toThrow(
+      "Config file Missing.json does not exist",
+    );
+  });
+});

src/providers/configuration.ts

@@ -0,0 +1,49 @@
+import fs from "fs";
+import path from "path";
+
+const ConfigurationData: Record<string, unknown> = {};
+
+function configDir(): string {
+  return path.join(process.cwd(), "configs");
+}
+
+function configExampleDir(): string {
+  return path.join(process.cwd(), "configs_example");
+}
+
+class Configuration {
+  public init(): void {
+    const dir = configDir();
+    if (!fs.existsSync(dir)) {
+      fs.mkdirSync(dir);
+    }
+    this.copyExampleIfNotExists("UpdaterConfig.json");
+
+    this.loadConfig("UpdaterConfig.json");
+  }
+
+  public loadConfig(configFileName: string): void {
+    const filePath = path.join(configDir(), configFileName);
+    if (!fs.existsSync(filePath)) throw new Error(`Config file ${configFileName} does not exist`);
+
+    const config = JSON.parse(fs.readFileSync(filePath, "utf-8"));
+    ConfigurationData[configFileName.replace(/\.[^/.]+$/, "")] = config;
+  }
+
+  public getConfig<T = unknown>(key?: string): T {
+    if (!key) return ConfigurationData as T;
+
+    if (ConfigurationData[key]) return ConfigurationData[key] as T;
+    throw new Error(`No configuration found for ${key}`);
+  }
+
+  private copyExampleIfNotExists(file: string): void {
+    const target = path.join(configDir(), file);
+    if (!fs.existsSync(target)) {
+      const example = path.join(configExampleDir(), file.replace(".json", ".example.json"));
+      fs.copyFileSync(example, target);
+    }
+  }
+}
+
+export default new Configuration();

src/providers/environment.test.ts

@@ -0,0 +1,38 @@
+import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test";
+
+mock.module("dotenv", () => ({
+  config: () => ({}),
+}));
+
+describe("Environment", () => {
+  const originalEnv = { ...process.env };
+
+  beforeEach(() => {
+    process.env = { ...originalEnv };
+  });
+
+  afterEach(() => {
+    process.env = { ...originalEnv };
+  });
+
+  test("throws when NODE_ENV is missing", async () => {
+    delete process.env.NODE_ENV;
+    const { default: Environment } = await import(`./environment?t=${Date.now()}-1`);
+    expect(() => Environment.init()).toThrow(".env NODE_ENV is undefined");
+  });
+
+  test("throws when NODE_ENV is an invalid value", async () => {
+    process.env.NODE_ENV = "staging";
+    const { default: Environment } = await import(`./environment?t=${Date.now()}-2`);
+    expect(() => Environment.init()).toThrow(
+      '.env NODE_ENV must be either "production" or "development"',
+    );
+  });
+
+  test("succeeds and exposes NODE_ENV when valid", async () => {
+    process.env.NODE_ENV = "development";
+    const { default: Environment } = await import(`./environment?t=${Date.now()}-3`);
+    Environment.init();
+    expect(Environment.get().NODE_ENV).toBe("development");
+  });
+});

src/providers/environment.ts

@@ -1,7 +1,11 @@
 import * as path from "path";
 import * as dotenv from "dotenv";
 
-import Logger from "../libs/Logger";
+import Logger from "../libs/logger";
+
+interface EnvironmentVariables {
+  NODE_ENV: string | undefined;
+}
 
 const requiredENV = ["NODE_ENV"];
 
@@ -9,34 +13,26 @@ class Environment {
   public init(): void {
     dotenv.config({ path: path.resolve(__dirname, "../../.env") });
 
-    for (let param of requiredENV) {
+    for (const param of requiredENV) {
       if (this.isUndefinedOrEmpty(process.env[param]))
         throw new Error(`.env ${param} is undefined`);
     }
 
     // NODE_ENV Checks
-    if (this.get().NODE_ENV != "production" && this.get().NODE_ENV != "development")
+    if (this.get().NODE_ENV !== "production" && this.get().NODE_ENV !== "development")
       throw new Error('.env NODE_ENV must be either "production" or "development"');
 
     Logger.log("info", `Running in ${process.env.NODE_ENV} environment`);
   }
 
-  public get(): any {
-    const NODE_ENV = process.env.NODE_ENV;
-
+  public get(): EnvironmentVariables {
     return {
-      NODE_ENV,
+      NODE_ENV: process.env.NODE_ENV,
     };
   }
 
-  private isUndefinedOrEmpty(value: String | undefined): boolean {
-    if (typeof value === "undefined") return true;
-
-    if (value === undefined) return true;
-
-    if (value === "") return true;
-
-    return false;
+  private isUndefinedOrEmpty(value: string | undefined): boolean {
+    return value === undefined || value === "";
   }
 }
 

src/providers/updater.ts

@@ -0,0 +1,176 @@
+import Logger from "../libs/logger";
+import Configuration from "./configuration";
+
+import CloudflareAPI from "../libs/cloudflare-api";
+import { getCurrentIPv4, getCurrentIPv6 } from "../libs/public-ip";
+import {
+  CloudflareConfig,
+  isCloudflareConfig,
+  isEnviromentTokenPlaceholder,
+  parseEnvironmentTokenPlaceholderName,
+} from "../libs/config-validation";
+
+class Updater {
+  private readonly config: Array<CloudflareConfig> = [];
+
+  public init(): void {
+    const _config = Configuration.getConfig<unknown[]>("UpdaterConfig");
+    if (!_config) {
+      Logger.error("No configuration found");
+      return;
+    }
+
+    for (const cloudflareConfig of _config) {
+      if (
+        !isCloudflareConfig(cloudflareConfig, (envTokenName) =>
+          Logger.error(`Environment variable ${envTokenName} not found`),
+        )
+      ) {
+        Logger.error(`Invalid configuration for cloudflare: ${JSON.stringify(cloudflareConfig)}`);
+        continue;
+      }
+
+      this.config.push(cloudflareConfig);
+    }
+
+    Logger.info(`Loaded ${this.config.length} cloudflare configs`);
+    this.start();
+  }
+
+  public start(): void {
+    Logger.info("Starting updater");
+    for (const cloudflareConfig of this.config) {
+      this.update(cloudflareConfig);
+      setInterval(() => this.update(cloudflareConfig), cloudflareConfig.updateInterval * 1000);
+    }
+  }
+
+  private async update(cloudflareConfig: CloudflareConfig) {
+    let token = cloudflareConfig.token;
+
+    // Replace placeholders env with value
+    if (isEnviromentTokenPlaceholder(token)) {
+      const envTokenName = parseEnvironmentTokenPlaceholderName(token)!;
+      if (process.env[envTokenName]) {
+        token = process.env[envTokenName]!;
+      } else {
+        Logger.error(`Environment variable ${envTokenName} not found`);
+        return;
+      }
+    }
+
+    let IPv4, IPv6;
+    try {
+      IPv4 = await getCurrentIPv4();
+      IPv6 = await getCurrentIPv6();
+    } catch (err) {
+      Logger.error(`Unable to fetch ip address: ${err}`);
+      return;
+    }
+
+    IPv4 && Logger.info(`Current IPv4 address: ${IPv4}`);
+    IPv6 && Logger.info(`Current IPv6 address: ${IPv6}`);
+
+    for (const zone of cloudflareConfig.zone) {
+      const api = new CloudflareAPI(token, zone.id);
+      const records = await api
+        .getRecord({
+          type: zone.type,
+          name: zone.name,
+        })
+        .catch((err) => {
+          Logger.error(`Unable to get records for zone ${zone.id}`);
+          return err;
+        });
+
+      if (records instanceof Error) {
+        continue;
+      }
+
+      // No records found, create it
+      if (!records || records.length === 0) {
+        const newContent = zone.content
+          .replaceAll("{CURRENT_IPv4}", IPv4)
+          .replaceAll("{CURRENT_IPv6}", IPv6!);
+
+        const result = await api
+          .createRecord({
+            type: zone.type,
+            name: zone.name,
+            content: IPv4,
+            ttl: zone.ttl,
+            proxied: zone.proxied,
+          })
+          .catch((err) => {
+            Logger.error(`Unable to create record: ${err.message}`);
+            return err;
+          });
+
+        if (result) Logger.info(`Created [${zone.type}] (${zone.name} -> ${newContent})`);
+      }
+
+      // Only 1 matching records found
+      else if (records.length === 1) {
+        const record = records[0];
+        const newContent = zone.content
+          .replaceAll("{CURRENT_IPv4}", IPv4)
+          .replaceAll("{CURRENT_IPv6}", IPv6!);
+
+        // Check if the ip is the same
+        if (record.content !== IPv4 && record.content !== IPv6) {
+          const updateResult = await api
+            .updateRecord({
+              record_id: record.id,
+              type: zone.type,
+              name: zone.name,
+              ttl: zone.ttl,
+              content: newContent,
+              proxied: zone.proxied,
+            })
+            .catch((err) => {
+              Logger.error(`Unable to update record: ${err.message}`);
+              return err;
+            });
+
+          if (updateResult)
+            Logger.info(
+              `[${zone.type}] (${zone.name} -> ${record.content}) updated to (${zone.name} -> ${newContent})`,
+            );
+        } else if (record.ttl !== zone.ttl || record.proxied !== zone.proxied) {
+          const updateResult = await api
+            .updateRecord({
+              record_id: record.id,
+              type: zone.type,
+              name: zone.name,
+              ttl: zone.ttl,
+              content: newContent,
+              proxied: zone.proxied,
+            })
+            .catch((err) => {
+              Logger.error(`Unable to update record: ${err.message}`);
+              console.log(err);
+              return;
+            });
+
+          if (updateResult)
+            Logger.info(
+              `[${zone.type}] (${zone.name} -> ${record.content}) updated proxy status/ttl (TTL: ${record.ttl} -> ${zone.ttl}) (Proxy status: ${record.proxied} -> ${zone.proxied})`,
+            );
+        } else {
+          Logger.info(`[${zone.type}] (${zone.name} -> ${record.content}) already up to date`);
+          continue;
+        }
+      }
+
+      // Many records found
+      else if (records.length > 1) {
+        Logger.error(
+          `Multiple records found for ${zone.type} (${zone.name}) (Multiple records are not supported right now)`,
+        );
+        continue;
+      }
+    }
+  }
+}
+
+export default new Updater();

tsconfig.json

@@ -25,7 +25,9 @@
     // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
 
     /* Modules */
-    "module": "commonjs",
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "types": ["bun"],
     /* Specify what module code is generated. */
     // "rootDir": "./",                                  /* Specify the root folder within your source files. */
     // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */