London | 26-SDC-March | Zobeir Rigi | Sprint 2 | Chat app

chat-app/backend/.gitignore

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+node_modules

chat-app/backend/Dockerfile

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+# Use Node
+FROM node:18
+
+# Create app folder
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy all files
+COPY . .
+
+# Expose port
+EXPOSE 3000
+
+# Start server
+CMD ["node", "app.js"]

chat-app/backend/app.js

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+const WebSocket = require("ws");
+const express = require("express");
+const cors = require('cors');
+
+const app = express();
+app.use(express.json())
+app.use(cors());
+
+const allMessages = []
+
+const fetchAllMessages = () => {
+    return allMessages
+}
+
+app.get("/messages", (req, res) => {
+    const messages = fetchAllMessages()
+    res.json(messages)
+})
+
+const clients = [];
+
+app.post("/message", (req, res) => {
+    const { message, name } = req.body
+
+    if (!message.trim() || !name.trim()) {
+        return res.status(400).json({
+            error: "Name and message are required"
+        })
+    }
+    const timestamp = new Date();
+    console.log(`Received message: ${name} ${message}`);
+    allMessages.push({
+        name, message, timestamp
+    })
+    console.log(allMessages)
+
+    clients.forEach(client => {
+        client.send(JSON.stringify({
+            name,
+            message,
+            timestamp
+        }))
+    })
+
+    res.send({
+        status: "success",
+        message: message,
+        name: name,
+        timestamp: timestamp
+    })
+
+})
+
+//webSocket
+
+const http = require("http");
+const server = http.createServer(app);
+
+const PORT = process.env.PORT || 3000;
+
+server.listen(PORT, () => {
+    console.log("server is running");
+});
+
+
+const wss = new WebSocket.Server({ server });
+
+wss.on("connection", (ws) => {
+    console.log("New client connected");
+    clients.push(ws);
+
+    ws.on("close", () => {
+        console.log("Client disconnected");
+        const index = clients.indexOf(ws);
+        clients.splice(index, 1);
+    });
+
+});