init

.env.example

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+DISPLAY_NAME="YOUR BOT DISPLAY NAME"
+ADMIN_NUMBER="628XXX"
+NODE_ENV=production
+PORT=4321

.eslintrc.json

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+{
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "overrides": [],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint", "simple-import-sort"],
+  "rules": {
+    "simple-import-sort/imports": "error",
+    "simple-import-sort/exports": "error"
+  }
+}

.gitignore

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+# build output
+dist/
+
+# dependencies
+node_modules/
+
+# logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# auth
+.wwebjs_auth
+
+# environment variables
+.env
+.env.production
+
+# macOS-specific files
+.DS_Store

Dockerfile

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+FROM node:20
+
+RUN apt-get update && apt-get install -y \
+    gconf-service \
+    libgbm-dev \
+    libasound2 \
+    libatk1.0-0 \
+    libc6 \
+    libcairo2 \
+    libcups2 \
+    libdbus-1-3 \
+    libexpat1 \
+    libfontconfig1 \
+    libgcc1 \
+    libgconf-2-4 \
+    libgdk-pixbuf2.0-0 \
+    libglib2.0-0 \
+    libgtk-3-0 \
+    libnspr4 \
+    libpango-1.0-0 \
+    libpangocairo-1.0-0 \
+    libstdc++6 \
+    libx11-6 \
+    libx11-xcb1 \
+    libxcb1 \
+    libxcomposite1 \
+    libxcursor1 \
+    libxdamage1 \
+    libxext6 \
+    libxfixes3 \
+    libxi6 \
+    libxrandr2 \
+    libxrender1 \
+    libxss1 \
+    libxtst6 \
+    ca-certificates \
+    fonts-liberation \
+    libappindicator1 \
+    libnss3 \
+    lsb-release \
+    xdg-utils \
+    wget
+
+RUN npm install -g pnpm
+
+WORKDIR /app
+
+COPY . .
+
+RUN pnpm install
+
+RUN pnpm run build
+
+EXPOSE 3000
+
+CMD ["pnpm", "start"]

README.md

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+# WA-GATE
+
+A very simple typescript whatsapp gateway via expressjs REST API using whatsapp-web.js
+
+## Contribution
+
+Any features request and contribution are welcome! ^\_^
+
+## Installation & Configuration
+
+### Configuration
+
+1. Make sure you clone this repo first
+2. Copy `.env.example` and rename it to `.env`
+3. Change the configuration there
+4. Don't forget to change the `logo.jpg` in the root directory
+
+### Installation
+
+1. Node.js v20+ , I've setups to 20 in package.json, you can change it but generally it works in Node.js v12 higher
+2. pnpm package manager, because why not
+3. You can go for docker for an easy setups, or if you deploy it manually you will need to install Google Chrome
+4. On an Ubuntu server, you will need to run this command:
+
+```bash
+sudo apt-get update && sudo apt-get install -y \
+    gconf-service \
+    libgbm-dev \
+    libasound2 \
+    libatk1.0-0 \
+    libc6 \
+    libcairo2 \
+    libcups2 \
+    libdbus-1-3 \
+    libexpat1 \
+    libfontconfig1 \
+    libgcc1 \
+    libgconf-2-4 \
+    libgdk-pixbuf2.0-0 \
+    libglib2.0-0 \
+    libgtk-3-0 \
+    libnspr4 \
+    libpango-1.0-0 \
+    libpangocairo-1.0-0 \
+    libstdc++6 \
+    libx11-6 \
+    libx11-xcb1 \
+    libxcb1 \
+    libxcomposite1 \
+    libxcursor1 \
+    libxdamage1 \
+    libxext6 \
+    libxfixes3 \
+    libxi6 \
+    libxrandr2 \
+    libxrender1 \
+    libxss1 \
+    libxtst6 \
+    ca-certificates \
+    fonts-liberation \
+    libappindicator1 \
+    libnss3 \
+    lsb-release \
+    xdg-utils \
+    wget
+```
+
+5. `cd` into the project directory
+6. run `pnpm install`
+7. run `pnpm build`
+8. run `pnpm start`
+9. After that you will need to scan the QR that is printed to the terminal
+10. You're basically done, or if you want to be more robust, you can use `pm2` for a better process management
+
+## Endpoints
+
+- [GET] /api/v1/
+
+Response:
+
+```json
+{
+  "message": "REST API is working"
+}
+```
+
+- [POST][Multipart/form-data] /api/v1/send/
+
+| name    | value        |
+| ------- | ------------ |
+| number  | 628XXX...    |
+| content | your message |
+
+Response:
+
+```json
+{
+  "status": "success",
+  "code": 200,
+  "message": "Message sucessfully sent",
+  "data": {
+    "number": "628XXX...",
+    "content": "Hi, mom!",
+    "type": "text"
+  }
+}
+```
+
+- [POST][Multipart/form-data] /api/v1/send/media
+
+| name    | value        |
+| ------- | ------------ |
+| number  | 628XXX...    |
+| content | your message |
+| file    | binary file  |
+
+Response:
+
+```json
+{
+  "status": "success",
+  "code": 200,
+  "message": "Message sucessfully sent",
+  "data": {
+    "number": "628XXX...",
+    "content": "this is your media caption",
+    "type": "media"
+  }
+}
+```
+
+### Error response
+
+```json
+{
+  "status": "error",
+  "code": 400,
+  "message": "Bad Image"
+}
+```
+
+#### Error code
+
+| Code | Status                |
+| ---- | --------------------- |
+| 200  | SUCCESS               |
+| 201  | CREATED               |
+| 204  | NO CONTENT            |
+| 400  | BAD REQUEST           |
+| 401  | UNAUTHORIZED          |
+| 403  | FORBIDDEN             |
+| 404  | NOT FOUND             |
+| 408  | TIME OUT              |
+| 429  | TOO MANY REQUEST      |
+| 500  | INTERNAL SERVER ERROR |
+| 503  | SERVICE UNAVAILABLE   |

app.ts

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+import compression from "compression";
+import express from "express";
+import helmet from "helmet";
+import { CacheMiddleware } from "./middlewares";
+import router from "./routes";
+import { JSON_OPTIONS, URL_ENCODE_OPTIONS } from "./utils/constant.util";
+
+const app = express();
+
+// Middlewares
+app.disable("x-powered-by");
+app.set("trust proxy", 1);
+
+app.use(compression());
+app.use(express.urlencoded(URL_ENCODE_OPTIONS));
+app.use(helmet());
+
+app.use(express.json(JSON_OPTIONS));
+app.use(CacheMiddleware);
+
+// Routes
+app.use("/api/v1", router);
+
+export { app };

controllers/sender.controller.ts

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+import { unlinkSync, writeFileSync } from "fs";
+import { tmpdir } from "os";
+import { join } from "path";
+
+import { client } from "..";
+
+import { NextFunction, Request, Response } from "../interfaces/base.interface";
+import { STATUS } from "../utils/constant.util";
+import { BadRequestError } from "../utils/error.util";
+import { Helper } from "../utils/helper.util";
+
+export const sendMsg = async (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  try {
+    const { content, number } = req.body;
+    const helper = new Helper();
+
+    if (!content) throw new BadRequestError("No message content provided!");
+    if (!helper.isValidPhoneNumber(number))
+      throw new BadRequestError("Phone number is not valid! Format: 62...");
+
+    client.sendMsg(content, number);
+
+    const result = {
+      status: "success",
+      code: 200,
+      message: "Message sucessfully sent",
+      data: {
+        number,
+        content,
+        type: "text",
+      },
+    };
+    res.status(STATUS.SUCCESS).json(result);
+  } catch (error) {
+    return next(error);
+  }
+};
+
+export const sendMedia = async (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  try {
+    const { content, number } = req.body;
+    const helper = new Helper();
+
+    if (!req.file) throw new BadRequestError("No file were provided!");
+    if (!helper.isValidPhoneNumber(number))
+      throw new BadRequestError("Phone number is not valid! Format: 62...");
+
+    const tempFilePath = join(tmpdir(), req.file.originalname);
+    writeFileSync(tempFilePath, req.file.buffer);
+
+    client.sendFile(content, number, tempFilePath).then(() => {
+      unlinkSync(tempFilePath);
+    });
+
+    const result = {
+      status: "success",
+      code: 200,
+      message: "Message sucessfully sent",
+      data: {
+        number,
+        content,
+        type: "media",
+      },
+    };
+
+    res.status(STATUS.SUCCESS).json(result);
+  } catch (error) {
+    console.log(error);
+    return next(error);
+  }
+};

index.ts

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+import dotenv from "dotenv";
+import { app } from "./app";
+import { WagateClient } from "./lib/wagate-client";
+import logger from "./utils/log.util";
+
+dotenv.config();
+const PORT = process.env.PORT || 4321;
+
+logger.info("Starting the server...");
+let client: WagateClient;
+
+// Init
+app.listen(PORT, async () => {
+  logger.info("REST API is running on port " + PORT);
+  client = new WagateClient();
+
+  logger.info("Starting the bot...");
+  await client.init();
+});
+
+// Global error catch
+process.once("unhandledRejection", async function (reason) {
+  logger.error(reason);
+});
+
+process.once("uncaughtException", async function (err) {
+  logger.error(err.message);
+});
+
+export { client };