├── .gitignore ├── index.js ├── package-lock.json └── package.json /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules/ 2 | .expo/ 3 | dist/ 4 | npm-debug.* 5 | *.jks 6 | *.p8 7 | *.p12 8 | *.key 9 | *.mobileprovision 10 | *.orig.* 11 | web-build/ 12 | 13 | # macOS 14 | .DS_Store 15 | 16 | # Temporary files created by Metro to check the health of the file watcher 17 | .metro-health-check* 18 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | const express = require("express"); 2 | const app = express(); 3 | const http = require("http").Server(app); 4 | const cors = require("cors"); 5 | const socketIO = require("socket.io")(http, { 6 | cors: { 7 | origin: "http://10.0.2.2:3000/", 8 | }, 9 | }); 10 | 11 | const PORT = 4000; 12 | 13 | function createUniqueId() { 14 | return Math.random().toString(20).substring(2, 10); 15 | } 16 | 17 | let chatgroups = []; 18 | 19 | app.use(express.urlencoded({ extended: true })); 20 | app.use(express.json()); 21 | app.use(cors()); 22 | 23 | socketIO.on("connection", (socket) => { 24 | console.log(`${socket.id} user is just connected`); 25 | 26 | socket.on("getAllGroups", () => { 27 | socket.emit("groupList", chatgroups); 28 | }); 29 | 30 | socket.on("createNewGroup", (currentGroupName) => { 31 | console.log(currentGroupName); 32 | chatgroups.unshift({ 33 | id: chatgroups.length + 1, 34 | currentGroupName, 35 | messages: [], 36 | }); 37 | socket.emit("groupList", chatgroups); 38 | }); 39 | 40 | socket.on("findGroup", (id) => { 41 | const filteredGroup = chatgroups.filter((item) => item.id === id); 42 | socket.emit("foundGroup", filteredGroup[0].messages); 43 | }); 44 | 45 | socket.on("newChatMessage", (data) => { 46 | const { currentChatMesage, groupIdentifier, currentUser, timeData } = data; 47 | const filteredGroup = chatgroups.filter( 48 | (item) => item.id === groupIdentifier 49 | ); 50 | const newMessage = { 51 | id: createUniqueId(), 52 | text: currentChatMesage, 53 | currentUser, 54 | time: `${timeData.hr}:${timeData.mins}`, 55 | }; 56 | 57 | socket 58 | .to(filteredGroup[0].currentGroupName) 59 | .emit("groupMessage", newMessage); 60 | filteredGroup[0].messages.push(newMessage); 61 | socket.emit("groupList", chatgroups); 62 | socket.emit("foundGroup", filteredGroup[0].messages); 63 | }); 64 | }); 65 | 66 | app.get("/api", (req, res) => { 67 | res.json(chatgroups); 68 | }); 69 | 70 | http.listen(PORT, () => { 71 | console.log(`Server is listeing on ${PORT}`); 72 | }); 73 | -------------------------------------------------------------------------------- /package-lock.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "backend", 3 | "version": "1.0.0", 4 | "lockfileVersion": 3, 5 | "requires": true, 6 | "packages": { 7 | "": { 8 | "name": 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