server.js

const express=require('express');
require('dotenv').config({path:'./config.env'});
const bodyParser=require('body-parser');
const cors=require('cors');
const morgan=require('morgan');
const path=require('path');
const Code=require('./models/Code');

require('./db/conn');

const app=express();
const port=process.env.PORT || 8000;

app.use(cors());
app.use(morgan("dev"));
app.use(bodyParser.json({limit:'50mb'}));
app.use(bodyParser.urlencoded({limit:"50mb",extended:false}));

app.use('/api',require('./routes/code'));

if(process.env.NODE_ENV === 'production'){
    app.use(express.static('client/build'))
    app.get("*", (req, res) => {
        res.sendFile(path.resolve(__dirname,  "client/build", "index.html"));
      });
}

const server=app.listen(port,()=>{
    console.log(`Server is running at http://localhost:${port}`);
})

const io=require('socket.io')(server);

io.on("connection",(socket)=>{
    console.log("Connected to socket!");
    socket.on('joined',async({roomDbId})=>{
        // console.log(roomDbId);
        socket.join(roomDbId);
    })
    socket.on("enteringCode",async({code,roomDbId})=>{
        // console.log(code);
        await Code.findOneAndUpdate({_id:roomDbId},{
            $set:{
                code
            }
        });
        socket.to(roomDbId).emit("receivingCode",{recCode:code});
    })
    socket.on('enteringInp',({inp,roomDbId})=>{
        // console.log(inp);
        socket.to(roomDbId).emit("receivingInp",{inp})
    })
    socket.on("sendOp",({op,roomDbId})=>{
        // console.log("op ",op);
        // socket.emit("receiveOp",{op})
        socket.to(roomDbId).emit("receiveOp",{op})
    })
    socket.on("changeExtLangSn",async({lng,cd,ex,roomDbId})=>{
        await Code.findOneAndUpdate({_id:roomDbId},{
            $set:{
                code:cd,language:lng,extension:ex
            }
        })
        io.to(roomDbId).emit("setExtLangSn",{lng,cd,ex});
    })
})