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index.js
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index.js
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// import libraries
const express = require("express");
const socket = require("socket.io");
// setting up express
const app = express();
// fetch port
const PORT = process.env.PORT || 8080;
// random id
rid = (len) => {
let str = "";
let options = "QWERTYUIOPASDFGHJKLZXCVBNM";
for (let i = 0; i < len; i++) {
str += options[Math.floor(Math.random() * options.length)];
}
return str;
};
// ROUTES
app.get("/", (req, res) => {
res.redirect("/" + rid(6));
});
app.get("/:room", (req, res) => {
let room = req.params.room;
res.sendFile(__dirname + "/public/index.html");
});
app.use(express.static(__dirname + "/public"));
app.use("/css", express.static(__dirname + "/public/css"));
app.use("/js", express.static(__dirname + "/public/js"));
// start server
const server = app.listen(PORT, () => {
console.log(`Listening on port ${PORT}`);
});
// setup socket
const io = socket(server);
let rooms = {};
io.on("connection", (s) => {
const id = s.id;
let name;
let room;
let roomId;
// player joins room
s.on("join", (data) => {
let { name, _roomId } = data;
roomId = _roomId;
s.join(roomId);
// if room does not exist
if (rooms[_roomId] == undefined) {
rooms[_roomId] = {
cleared: true,
players: [],
leader: id,
leaderName: name,
};
s.emit("grantLeader");
} else {
// if room already exists
rooms[_roomId].players.push({
name: name,
id: id,
score: 0,
buzzed: false,
});
}
room = rooms[_roomId];
io.to(roomId).emit("sendInfo", room);
});
// clear buzzes event
s.on("clear", () => {
if (room.leader !== id || room.cleared) {
return;
}
clear();
});
// buzz event
s.on("buzz", () => {
if (!room || !room.cleared || room.leader == s.id) {
return;
}
room.cleared = false;
room.players.find((v) => v.id == id).buzzed = true;
io.to(roomId).emit("sendInfo", room);
});
// change player score
s.on("scorechange", (value) => {
if (room.leader !== id || room.cleared) {
return;
}
const buzzedPlayer = room.players.find((v) => v.buzzed);
buzzedPlayer.score += value;
clear();
});
// clears buzzes
function clear() {
room.cleared = true;
const buzzedPlayer = room.players.find((v) => v.buzzed);
buzzedPlayer.buzzed = false;
io.to(roomId).emit("sendInfo", room);
}
// when a player leaves
s.on("disconnect", () => {
try {
if (room.leader == id) {
io.to(roomId).emit("restart");
delete rooms[roomId];
} else {
// io.to(room).emit("player-left", { name: name, id: id });
// rooms[room].players.filter((player) => player.id !== id);
}
} catch {}
});
});