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server.js
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server.js
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const VERSION ="1.0.1";
const express = require('express')
const cors = require('cors')
const axios = require('axios')
const { response } = require('express')
const mongoose = require('mongoose')
const app = express()
const port = process.env.PORT || 8080
app.use(express.json())
app.use(express.urlencoded({
extended: true
}))
app.use(cors())
// Connect to MongoDB.
console.log("Connecting to MongoDB database...");
mongoose.connect(process.env.MONGODB_URI, {useNewUrlParser: true, useUnifiedTopology: true, useCreateIndex: true});
const db = mongoose.connection;
// On error...
db.on('error', console.error.bind(console, 'Connection error:'));
// On success...
db.once('open', function() {
console.log("Connected to MongoDB database.\n");
const gameSchema = new mongoose.Schema({
// Games should be deleted when the host leaves so game IDs can be reused later.
// While a game is active, the ID should be unique.
gameID: { type: String, required: true, unique: true },
nicknameHost: { type: String, required: true },
nicknameGuest: { type: String },
hostChoice: String,
guestChoice: String,
hostReady: Boolean,
guestReady: Boolean
});
const Game = mongoose.model('Game', gameSchema);
// Routes.
// Ignore favicon.
app.get('/favicon.ico', (req, res) => res.status(204));
// Default route.
app.get('/', (req, res) => {
res.status(200);
res.send("Hello, world!");
});
// Get version.
app.get('/version', (req, res) => {
res.status(200);
res.send(VERSION);
});
// Create game.
app.post('/create/:nickname', async (req, res) => {
let newGame = new Game();
// Limit to 20 characters.
const nickname = decodeURIComponent(req.params["nickname"]).substring(0, 20);
console.log(`Received create game request for host ${nickname}.`);
// Generate a valid and unique game ID.
let gameID = "";
let queryRes = null;
do {
gameID = Math.floor(Math.random() * 9999).toString().padStart(4, "0");
queryRes = await Game.findOne({gameID}).exec();
} while (queryRes != null);
newGame.gameID = gameID;
newGame.nicknameHost = nickname;
newGame.nicknameGuest = null;
newGame.hostChoice = null;
newGame.guestChoice = null;
newGame.hostReady = false;
newGame.guestReady = false;
console.log(`Game ID ${gameID}: creating game for host '${nickname}'...`);
// Save the game.
newGame.save(function (err, result) {
if (err) {
console.log(err);
res.status(500);
res.send("error:could_not_create_game");
}
});
res.status(201);
res.send(newGame);
});
// Join game.
app.get('/join/:gameID,:nickname', async (req, res) => {
const gameID = req.params["gameID"];
// Limit name to 20 characters.
const nickname = decodeURIComponent(req.params["nickname"]).substring(0, 20);
console.log(`Received request from ${nickname} to join game ${gameID}.`);
const game = await Game.findOne({gameID}).exec();
if (game != null) {
if (game.nicknameGuest != null) {
console.log(`Game ID ${gameID}: guest '${nickname}' tried to join a game that is already full.`);
res.status(403);
res.send("error:game_full");
return;
}
game.nicknameGuest = nickname;
game.save();
console.log(`Game ID ${gameID}: guest '${nickname}' joined '${game.nicknameHost}'s game.`);
res.status(200);
res.send(game);
} else {
console.log(`Game ID ${gameID}: guest '${nickname}' tried to join a game that does not exist.`);
res.status(404);
res.send("error:game_does_not_exist");
}
});
// Set a player's choice.
app.post('/choice/:gameID,:isHost,:choice', async (req, res) => {
const gameID = req.params["gameID"];
const isHost = req.params["isHost"] == "true";
const choice = req.params["choice"];
const game = await Game.findOne({gameID}).exec();
if (game != null) {
if (isHost) {
game.hostChoice = choice;
console.log(`Game ID ${gameID}: host '${game.nicknameHost}' chose '${choice}'.`);
} else {
game.guestChoice = choice;
console.log(`Game ID ${gameID}: guest '${game.nicknameGuest}' chose '${choice}'.`);
}
game.save();
res.status(200);
res.send(game);
return;
} else {
res.status(404);
res.send("error:game_does_not_exist");
}
});
// Get the current state of the game.
app.get('/getState/:gameID', async (req, res) => {
const gameID = req.params["gameID"];
const game = await Game.findOne({gameID}).exec();
if (game != null) {
res.status(200);
res.send(game);
} else {
res.status(404);
res.send("error:game_does_not_exist");
}
});
// Update the state of the player (ready for next round, exit).
app.post(`/playerStatus/:gameID,:isHost,:status`, async (req, res) => {
const gameID = req.params["gameID"];
const isHost = req.params["isHost"] == "true";
const status = req.params["status"];
const game = await Game.findOne({gameID}).exec();
if (game != null) {
if (status == "ready") {
if (isHost) {
game.hostReady = true;
} else {
game.guestReady = true;
}
if (game.hostReady && game.guestReady) {
game.hostReady = false;
game.guestReady = false;
game.hostChoice = null;
game.guestChoice = null;
}
} else if (status == "exit") {
if (isHost) {
game.deleteOne();
res.status(200);
res.send("player_left");
return;
} else {
game.nicknameGuest = null;
game.hostReady = false;
game.guestReady = false;
game.hostChoice = null;
game.guestChoice = null;
}
}
game.save();
res.status(200);
res.send(game);
} else {
res.status(404);
res.send("error:game_does_not_exist");
}
});
app.listen(port);
}); // end of on successful connection to MongoDB