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/**
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* AI Interactive Fiction - Web Server
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* Serves the web UI and handles WebSocket communication
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*/
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import path from 'path';
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import express from 'express';
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import http from 'http';
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import { Server as SocketIOServer } from 'socket.io';
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import * as dotenv from 'dotenv';
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import { GameRunner } from './cli/game-runner';
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import { existsSync, mkdirSync, copyFileSync } from 'fs';
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// Load environment variables
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dotenv.config();
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// Create Express application
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const app = express();
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const server = http.createServer(app);
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const io = new SocketIOServer(server);
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// Get port from environment variables or use default
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const DEFAULT_PORT = 3000;
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const PORT = process.env.PORT ? parseInt(process.env.PORT) : DEFAULT_PORT;
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const PORT_RANGE = 10; // Try up to 10 ports starting from the default
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// Serve static files from the public directory
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app.use(express.static(path.join(__dirname, '../public')));
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// Set up game sessions
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const gameSessions = new Map<string, GameRunner>();
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// Handle socket connections
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io.on('connection', (socket) => {
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console.log(`New client connected: ${socket.id}`);
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// Start a new game
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socket.on('startGame', async () => {
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try {
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// Initialize game runner
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const gameRunner = new GameRunner();
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const worldFile = process.env.DEFAULT_WORLD_FILE || './data/worlds/example_world.yml';
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// Initialize the game
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await gameRunner.initialize(worldFile);
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// Store game session
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gameSessions.set(socket.id, gameRunner);
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// Send introduction to client
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const gameState = gameRunner.getGameState();
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socket.emit('gameIntroduction', {
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introduction: gameState.world.introduction,
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initialRoomDescription: gameRunner.getCurrentRoomDescription(),
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currentRoomId: gameState.currentRoomId
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});
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} catch (error) {
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console.error('Error starting game:', error);
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socket.emit('error', { message: 'Failed to start game. Please try again.' });
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}
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});
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// Process player command
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socket.on('playerCommand', async (data) => {
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try {
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const gameRunner = gameSessions.get(socket.id);
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if (!gameRunner) {
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socket.emit('error', { message: 'Game session not found. Please start a new game.' });
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return;
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}
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// Process command and get response
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const response = await gameRunner.processCommand(data.command);
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// Send narrative response to client
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socket.emit('narrativeResponse', {
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text: response,
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gameState: {
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currentRoomId: gameRunner.getGameState().currentRoomId
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},
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suggestions: gameRunner.getSuggestions()
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});
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} catch (error) {
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console.error('Error processing command:', error);
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socket.emit('error', { message: 'Failed to process command. Please try again.' });
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}
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});
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// Save game state
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socket.on('saveGame', () => {
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try {
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const gameRunner = gameSessions.get(socket.id);
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if (!gameRunner) {
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socket.emit('error', { message: 'Game session not found. Please start a new game.' });
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return;
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}
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// Store save data in session
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socket.data.savedGame = gameRunner.getGameState();
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socket.emit('gameSaved');
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} catch (error) {
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console.error('Error saving game:', error);
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socket.emit('error', { message: 'Failed to save game. Please try again.' });
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}
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});
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// Load game state
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socket.on('loadGame', () => {
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try {
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const gameRunner = gameSessions.get(socket.id);
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if (!gameRunner) {
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socket.emit('error', { message: 'Game session not found. Please start a new game.' });
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return;
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}
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// Check if there's a saved game
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if (!socket.data.savedGame) {
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socket.emit('error', { message: 'No saved game found.' });
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return;
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}
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// Load saved game
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gameRunner.loadGameState(socket.data.savedGame);
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// Send current state to client
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socket.emit('gameLoaded', {
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currentRoomDescription: gameRunner.getCurrentRoomDescription(),
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currentRoomId: gameRunner.getGameState().currentRoomId
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});
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} catch (error) {
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console.error('Error loading game:', error);
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socket.emit('error', { message: 'Failed to load game. Please try again.' });
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}
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});
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// Handle disconnection
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socket.on('disconnect', () => {
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console.log(`Client disconnected: ${socket.id}`);
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// Clean up game session
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if (gameSessions.has(socket.id)) {
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gameSessions.delete(socket.id);
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}
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});
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});
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// Ensure required asset folders exist
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function ensureDirectories() {
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const dirs = [
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path.join(__dirname, '../public'),
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path.join(__dirname, '../public/js'),
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path.join(__dirname, '../public/css'),
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path.join(__dirname, '../public/images'),
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path.join(__dirname, '../public/fonts')
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];
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for (const dir of dirs) {
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if (!existsSync(dir)) {
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mkdirSync(dir, { recursive: true });
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}
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}
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}
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// Copy kokoro-js library from node_modules if not already present
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function ensureKokoroJs() {
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const source = path.join(__dirname, '../node_modules/kokoro-js/dist/index.js');
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const destination = path.join(__dirname, '../public/js/kokoro-js.js');
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if (existsSync(source) && !existsSync(destination)) {
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copyFileSync(source, destination);
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console.log(`Copied kokoro-js from ${source} to ${destination}`);
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}
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}
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// Start the server with port fallback
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export async function startServer(initialPort: number, range: number): Promise<void> {
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let currentPort = initialPort;
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const maxPort = initialPort + range;
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// Try ports in the specified range
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while (currentPort < maxPort) {
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try {
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// Ensure directories exist
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ensureDirectories();
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// Ensure kokoro-js is copied
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try {
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ensureKokoroJs();
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} catch (error) {
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console.error('Error copying kokoro-js:', error);
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}
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// Try to start the server on the current port
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await new Promise<void>((resolve, reject) => {
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server.listen(currentPort, () => {
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console.log(`AI Interactive Fiction web server running on http://localhost:${currentPort}`);
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resolve();
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});
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server.on('error', (error: NodeJS.ErrnoException) => {
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// If port is in use, try next port
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if (error.code === 'EADDRINUSE') {
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console.log(`Port ${currentPort} is in use, trying next port...`);
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server.close();
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currentPort++;
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reject();
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} else {
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// For other errors, log and reject
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console.error('Server error:', error);
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reject(error);
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}
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});
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});
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// If we reach here, server started successfully
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return;
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} catch (error) {
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// If we reach the max port and still fail, throw an error
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if (currentPort >= maxPort - 1) {
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throw new Error(`Failed to start server on ports ${initialPort} to ${maxPort - 1}`);
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}
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// Otherwise try the next port
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// The loop continues as the rejection above increments currentPort
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}
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}
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}
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// Start the server when this module is run directly
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if (require.main === module) {
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startServer(PORT, PORT_RANGE).catch(error => {
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console.error('Failed to start server:', error);
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process.exit(1);
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});
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}
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export { app, server, io };
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