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api/server.js

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+const express = require("express"); 
+const mongoose = require("mongoose"); 
+const dotenv = require('dotenv');
+const path = require('path');
+const { Server } = require("socket.io");
+const { createServer } = require('http');
+const {broadcasting} = require('./sockets/broadcasting');
+const cors=require("cors");
+
+// DotEnv Configuration
+dotenv.config();
+
+// Mongo DB Configuration
+const dbConfig = {
+    database : process.env.MONGO_DB ?? '',
+    hostname : process.env.MONGO_HOST ?? '',
+    port : process.env.MONGO_PORT ?? '',
+};
+
+const connectionURI = `mongodb://${dbConfig.hostname}:${dbConfig.port}/${dbConfig.database}`
+mongoose.connect(connectionURI);
+const db = mongoose.connection;
+db.on("error", console.error.bind(console, "connection error:"));
+db.once("open", () => {
+    console.log("Database connected");
+});
+
+// App configuration
+const appConfig = { port : process.env.APP_PORT ?? '5000' }
+
+const app = express();
+app.use(express.json());
+app.use(express.static(path.join(__dirname, "public")));
+app.use(cors({
+    origin:'*', 
+    credentials:true,            
+    optionSuccessStatus:200,
+ }));
+
+// Route Configuration
+const userRoutes = require("./routes/users");
+const filtersRoutes = require("./routes/filters");
+const matchingRoutes = require("./routes/matchings");
+const chatRoutes = require("./routes/chats");
+const commendationRoutes = require("./routes/commendations");
+
+app.use("/", userRoutes);
+app.use("/", filtersRoutes);
+app.use("/", matchingRoutes);
+app.use("/", chatRoutes);
+app.use("/", commendationRoutes)
+
+// Starting the node.js server
+app.listen(appConfig.port, () => {
+    console.log(`Serving express server on port ${appConfig.port}`);
+});
+
+// Socket configuration
+
+const httpServer = createServer();
+const io = new Server(httpServer);
+
+broadcasting(io); // Used for sending and receiving simple real-time messages between users.
+
+const socketConfig = { port : process.env.SOCKET_PORT ?? '2000'}
+httpServer.listen(socketConfig.port, () => {
+    console.log(`Serving socket server on port ${socketConfig.port}`);
+});