first commit

.env

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+PORT=9000
+MONGO_URI=mongodb://localhost:27017/CompanyAuth

.gitignore

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+/node_modules
+/dist
+/build
+/coverage
+/logs
+/temp

package.json

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+{
+  "name": "authserver",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node dist/index.js",
+    "dev": "nodemon src/index.ts",
+    "build": "tsc",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "bcrypt": "^5.1.1",
+    "cors": "^2.8.5",
+    "dotenv": "^16.5.0",
+    "express": "^5.1.0",
+    "jsonwebtoken": "^9.0.2",
+    "mongoose": "^8.14.1",
+    "uuid": "^11.1.0"
+  },
+  "devDependencies": {
+    "@types/bcrypt": "^5.0.2",
+    "@types/cors": "^2.8.18",
+    "@types/express": "^5.0.1",
+    "@types/jsonwebtoken": "^9.0.9",
+    "@types/mongoose": "^5.11.97",
+    "@types/node": "^22.15.16",
+    "nodemon": "^3.1.10",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.8.3"
+  }
+}

src/controllers/company.controller.ts

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+import { NextFunction, Request, Response } from "express";
+import { CompanyType } from "../models/company.modal";
+import { createCompany } from "../services/company.service";
+import { successResponse } from "../utils/response";
+
+export const createCompanyController = async (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  try {
+    const { name } = req.body;
+    if (!name) throw new Error("400:Name is required");
+
+    const company = await createCompany(name);
+
+    successResponse<CompanyType>(res, company);
+  } catch (error) {
+    next(error);
+  }
+};

src/controllers/user.controller.ts

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+import { NextFunction, Request, Response } from "express";
+import { CreateJwtTokenRequest, UserType } from "../models/user.modal";
+import { createJWTToken, createUserToken } from "../services/user.service";
+import { TypedRequestBody } from "../type/api";
+import { checkBodyAndThrowError } from "../utils/checkBodyAndThrowError";
+import { successResponse } from "../utils/response";
+
+export const getUserTokenController = async (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  try {
+    const token = req.headers.authorization?.split(" ")[1];
+    const { companyName } = req.params;
+
+    if (!token) throw new Error("401:Token is required");
+    if (!companyName) throw new Error("400:companyName is required");
+
+    const user = await createUserToken(token, companyName);
+    successResponse<UserType>(res, user);
+  } catch (error) {
+    next(error);
+  }
+};
+
+export const createJwtTokenController = async (
+  req: TypedRequestBody<CreateJwtTokenRequest>,
+  res: Response,
+  next: NextFunction
+) => {
+  try {
+    checkBodyAndThrowError(req.body, [
+      "name",
+      "amount",
+      "lobby",
+      "companyName",
+    ]);
+
+    const token = await createJWTToken(req.body);
+    successResponse<string>(res, token);
+  } catch (error) {
+    next(error);
+  }
+};

src/index.ts

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+import cors from "cors";
+import dotenv from "dotenv";
+import express, { Express } from "express";
+import connectDB from "./lib/database";
+import { errorHandler } from "./middleware/error";
+
+import companyRoutes from "./routes/company";
+import userRoutes from "./routes/user";
+
+dotenv.config();
+
+const app: Express = express();
+const port = process.env.PORT || 3000;
+
+connectDB();
+
+app.use(cors());
+app.use(express.json());
+
+app.use("/api/company", companyRoutes);
+app.use("/api/user", userRoutes);
+app.use(errorHandler);
+
+app.get("/health", (req, res) => {
+  res.status(200).json({ status: "ok" });
+});
+
+app.listen(port, () => {
+  console.log(`⚡️ Server running at http://localhost:${port}`);
+});

src/lib/database.ts

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+import dotenv from "dotenv";
+import mongoose from "mongoose";
+
+dotenv.config();
+
+const connectDB = async (): Promise<void> => {
+  try {
+    const mongoUri =
+      process.env.MONGO_URI || "mongodb://localhost:27017/companyAuth";
+    await mongoose.connect(mongoUri);
+    console.log("✅ MongoDB Connected");
+  } catch (error) {
+    console.error("❌ MongoDB Connection Error:", error);
+    process.exit(1);
+  }
+};
+
+export default connectDB;

src/middleware/error.ts

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+import { NextFunction, Request, Response } from "express";
+import { errorResponse } from "../utils/response";
+
+export const errorHandler = (
+  err: Error,
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  if (err instanceof Error) {
+    console.log(err);
+    const errorCode = err.message.split(":")[0];
+    const errorMessage = err.message.split(":")[1];
+    errorResponse(res, errorCode, errorMessage);
+  } else {
+    console.log(err);
+    errorResponse(res, "9999", "Internal server error");
+  }
+};

src/models/company.modal.ts

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+import mongoose from "mongoose";
+
+export interface CreateCompanyRequest {
+  name: string;
+}
+
+export interface CompanyOptions {
+  name?: string;
+  secretKey?: string;
+}
+
+export interface CompanyType extends mongoose.Document {
+  name: string;
+  secretKey: string;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+const companySchema = new mongoose.Schema({
+  name: { type: String, required: true, unique: true },
+  secretKey: { type: String, required: true, unique: true },
+  createdAt: { type: Date, default: Date.now },
+  updatedAt: { type: Date, default: Date.now },
+});
+
+const Company = mongoose.model("Company", companySchema);
+
+export default Company;

src/models/user.modal.ts

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+import mongoose from "mongoose";
+
+export interface UserPayloadRequest {
+  name: string;
+  amount: number;
+  lobby: string;
+}
+
+export interface UserPayload extends UserPayloadRequest {
+  iat: number;
+  exp: number;
+}
+
+export interface CreateJwtTokenRequest extends UserPayload {
+  companyName: string;
+}
+
+export interface UserType extends mongoose.Document {
+  name: string;
+  amount: number;
+  lobby: string;
+  token: string;
+  count: number;
+}
+
+const userSchema = new mongoose.Schema({
+  name: { type: String, required: true },
+  amount: { type: Number, required: true },
+  lobby: { type: String, required: true },
+  token: { type: String, required: true },
+  count: { type: Number, default: 0 },
+  record: { type: Array, default: [] },
+  createdAt: { type: Date, default: Date.now },
+  updatedAt: { type: Date, default: Date.now },
+});
+
+const User = mongoose.model("User", userSchema);
+
+export default User;

src/routes/company.ts

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+import { Router } from "express";
+import { createCompanyController } from "../controllers/company.controller";
+
+const router = Router();
+
+router.post("/create", createCompanyController);
+
+export default router;

src/routes/user.ts

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+import { Router } from "express";
+import {
+  createJwtTokenController,
+  getUserTokenController,
+} from "../controllers/user.controller";
+
+const router = Router();
+
+router.post("/createJwtToken", createJwtTokenController);
+router.get("/getUserToken/:companyName", getUserTokenController);
+
+export default router;

src/services/company.service.ts

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+import { v4 as uuidv4 } from "uuid";
+import Company, { CompanyOptions } from "../models/company.modal";
+
+export const createCompany = async (name: string) => {
+  try {
+    const existingCompanyName = await getCompanyByOptions({ name });
+    if (existingCompanyName) throw "409:Company already exists";
+
+    const secretKey = uuidv4();
+
+    const existingCompanySecretKey = await getCompanyByOptions({ secretKey });
+    if (existingCompanySecretKey) throw "409:Company secret key already exists";
+
+    const newCompany = await Company.create({
+      name,
+      secretKey,
+    });
+
+    return newCompany;
+  } catch (error) {
+    throw new Error((error as string) || "500:Failed to create company");
+  }
+};
+
+export const getCompanyById = async (id: string) => {
+  try {
+    const company = await Company.findById(id);
+    return company;
+  } catch (error) {
+    throw new Error(
+      ((error as string) || "500:Failed to get company by") + `id: ${id}`
+    );
+  }
+};
+
+export const getCompanyByOptions = async (options: CompanyOptions) => {
+  try {
+    const company = await Company.findOne(options);
+    return company;
+  } catch (error) {
+    throw new Error(
+      ((error as string) || "500:Failed to get company by") +
+        `options: ${JSON.stringify(options)}`
+    );
+  }
+};

src/services/jwtToken.ts

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+import jwt from "jsonwebtoken";
+import { UserPayload, UserPayloadRequest } from "../models/user.modal";
+
+export const verifyToken = (token: string, secret: string) => {
+  try {
+    const decoded = jwt.verify(token, secret);
+    if (!decoded) throw "401:Invalid token";
+
+    return decoded as UserPayload;
+  } catch (error) {
+    if (error instanceof jwt.TokenExpiredError) {
+      throw new Error("401:Token expired");
+    }
+    throw new Error((error as string) || "500:Failed to verify token");
+  }
+};
+
+export const generateToken = (payload: UserPayloadRequest, secret: string) => {
+  try {
+    const token = jwt.sign(payload, secret, { expiresIn: "1h" });
+    return token;
+  } catch (error) {
+    throw new Error((error as string) || "500:Failed to generate token");
+  }
+};

src/services/user.service.ts

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+import { Request } from "express";
+import { v4 as uuidv4 } from "uuid";
+import User, { UserPayload } from "../models/user.modal";
+import { getCompanyByOptions } from "./company.service";
+import { generateToken, verifyToken } from "./jwtToken";
+
+export const createUserToken = async (token: string, companyName: string) => {
+  try {
+    const company = await getCompanyByOptions({ name: companyName });
+    if (!company) throw "404:Company not found";
+
+    const user = verifyToken(token, company.secretKey);
+    if (!user) throw "0001:User not found";
+
+    const userModel = await createUserModel(user);
+    return userModel;
+  } catch (error) {
+    if (error instanceof Error) throw error.message;
+
+    throw new Error((error as string) || "500:Failed to create user token");
+  }
+};
+
+export const createJWTToken = async (body: Request["body"]) => {
+  try {
+    const { name, amount, lobby, companyName } = body;
+
+    const company = await getCompanyByOptions({ name: companyName });
+    if (!company) throw "404:Company not found";
+
+    const token = generateToken({ name, amount, lobby }, company.secretKey);
+    return token;
+  } catch (error) {
+    if (error instanceof Error) throw error.message;
+
+    throw new Error((error as string) || "500:Failed to create JWT token");
+  }
+};
+
+export const createUserModel = async (user: UserPayload) => {
+  try {
+    const { iat, exp, ...userPayload } = user;
+    const token = uuidv4();
+
+    const newUser = {
+      ...userPayload,
+      token: token,
+      count: 0,
+    };
+
+    const userModel = await User.create(newUser);
+    return userModel;
+  } catch (error) {
+    throw new Error((error as string) || "500:Failed to create user model");
+  }
+};

src/type/api.ts

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+import { Request } from "express";
+
+export interface TypedRequestBody<T> extends Request {
+  body: T;
+}

src/utils/checkBodyAndThrowError.ts

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+import { Request } from "express";
+
+export const checkBodyAndThrowError = (
+  body: Request["body"],
+  requiredFields: string[]
+) => {
+  requiredFields.forEach((field) => {
+    if (!body[field]) throw new Error(`400:${field} is required`);
+  });
+};

src/utils/response.ts

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+import { Response } from "express";
+
+export const successResponse = <T>(res: Response, data: T) => {
+  res.status(200).json({
+    message: "Success",
+    data,
+  });
+};
+
+export const errorResponse = (
+  res: Response,
+  errorCode: string,
+  message: string
+) => {
+  switch (errorCode) {
+    case "400":
+      res.status(400).json({
+        message,
+      });
+      break;
+    case "401":
+      res.status(401).json({
+        message,
+      });
+      break;
+    case "403":
+      res.status(403).json({
+        message,
+      });
+      break;
+    case "404":
+      res.status(404).json({
+        message,
+      });
+      break;
+    case "409":
+      res.status(409).json({
+        message,
+      });
+      break;
+    case "9999":
+      res.status(500).json({
+        message,
+      });
+      break;
+    default:
+      res.status(500).json({
+        message,
+      });
+      break;
+  }
+};

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es2016",
+    "module": "commonjs",
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules"]
+}