Initial commit

app.js

@@ -0,0 +1,146 @@
+// const express = require("express");
+// const socket = require("socket.io");
+
+// const http = require("http");
+// const { Chess } = require("chess.js");
+// const path = require("path");
+
+// const app = express(); //Routing and middleware setup are done by express ////app has an instance of express
+// const server = http.createServer(app);
+// const io = socket(server); //socket is used to connect in real time
+
+// const chess = new Chess(); //now all the rules of chess is stored in chess variable
+// let players = {};
+// let currentPlayer = "w";
+
+// app.set("view engine", "ejs");
+// app.use(express.static(path.join(__dirname, "public"))); //by this we can use images and all
+
+// app.get("/", (req, res) => {
+//   res.render("index", { title: "Chess Game" });
+// });
+
+// io.on("connection", function (uniquesocket) {
+//   console.log("connected");
+
+//   if (!players.white) {
+//     players.white = uniquesocket.id;
+//     uniquesocket.emit("playerRole", "w");
+//   } else if (!players.black) {
+//     players.black = uniquesocket.id;
+//     uniquesocket.emit("playerRole", "b");
+//   } else {
+//     uniquesocket.emit("spectatorRole");
+//   }
+
+//   uniquesocket.on("disconnect", function () {
+//     if (uniquesocket.id === players.white) {
+//       delete players.white;
+//     } else if (uniquesocket.id === players.black) {
+//       delete players.black;
+//     }
+//   });
+
+//   uniquesocket.on("move", (move) => {
+//     try {
+//       if (chess.turn() === "w" && uniquesocket.id !== players.white) return; //uniquesocket.on("move", (move) => {} isse  move event record hoga
+//       if (chess.turn() === "b" && uniquesocket.id !== players.black) return;
+
+//       const result = chess.move(move); //idhar move event(jo bhi pawn move hua hai wo) valid hai ki nahi  evaluate hoga
+
+//       if (result) {
+//         currentPlayer = chess.turn();
+//         io.emit("move", move);
+//         io.emit("boardState", chess.fen());
+//       } else {
+//         console.log("Invalid move: ", move); ////consoling in browser
+//         uniquesocket.emit("invalidMove", move); ////informing the player that the move is invalid
+//       }
+//     } catch (err) {
+//       console.log(err);
+//       uniquesocket.emit("Invalid move: ", move); ////const result = chess.move(move);if this line fails then catch is executed///////timestamp:1:06:06
+//     }
+//   });
+// });
+
+// server.listen(3000, function () {
+//   console.log("Listening");
+// });
+// //3 types of server method
+// //server sends the message to the sender itself also, so only the sender can be able to know that the message is sent to  other/s
+// //server sends the message to only particular person
+// //server send the message to all except sender , this is called broadcasting. Eg:When you are typing in whatsapp, it shows typing to others except the typer
+
+
+
+const express = require("express");
+const http = require("http");
+const socketIo = require("socket.io");
+const { Chess } = require("chess.js");
+const path = require("path");
+
+const app = express();
+const server = http.createServer(app);
+const io = socketIo(server);
+
+const chess = new Chess();
+let players = {};
+let currentPlayer = "w";
+
+app.set("view engine", "ejs");
+app.use(express.static(path.join(__dirname, "public")));
+
+
+app.get("/", (req, res) => {
+  res.render("index", { title: "Chess Game" });
+});
+
+io.on("connection", (socket) => {
+  console.log("A player connected:", socket.id);
+
+  if (!players.white) {
+    players.white = socket.id;
+    socket.emit("playerRole", "w");
+  } else if (!players.black) {
+    players.black = socket.id;
+    socket.emit("playerRole", "b");
+  } else {
+    socket.emit("spectatorRole");
+  }
+
+  socket.on("disconnect", () => {
+    if (socket.id === players.white) {
+      delete players.white;
+    } else if (socket.id === players.black) {
+      delete players.black;
+    }
+  });
+
+  socket.on("move", (move) => {
+    try {
+      if ((chess.turn() === "w" && socket.id !== players.white) ||
+          (chess.turn() === "b" && socket.id !== players.black)) {
+        return;
+      }
+
+      const result = chess.move(move);
+      if (result) {
+        currentPlayer = chess.turn();
+        io.emit("move", move);
+        io.emit("boardState", chess.fen());
+      } else {
+        console.log("Invalid move:", move);
+        socket.emit("invalidMove", move);
+      }
+    } catch (err) {
+      console.error(err);
+      socket.emit("error", "Invalid move");
+    }
+  });
+
+  socket.emit("boardState", chess.fen());
+});
+
+server.listen(3000, () => {
+  console.log("Server listening on port 3000");
+});