khalil
fbf5135dc8
- 3-tier architecture: Frontend (Nginx) → API (Node.js) → PostgreSQL - Custom Prometheus metrics: hunger_level, happiness_score, energy_level - Creature decay loop: stats degrade every 15 seconds - Bilingual UI (EN/FR)
369 lines
14 KiB
JavaScript
369 lines
14 KiB
JavaScript
const express = require('express');
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const cors = require('cors');
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const { Pool } = require('pg');
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const { v4: uuidv4 } = require('uuid');
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const client = require('prom-client');
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const app = express();
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app.use(cors());
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app.use(express.json());
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// ============================================================================
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// Prometheus Metrics Setup
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// ============================================================================
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const register = new client.Registry();
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client.collectDefaultMetrics({ register });
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// Custom Tamagotchi metrics
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const hungerGauge = new client.Gauge({
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name: 'tamagotchi_hunger_level',
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help: 'Current hunger level of each creature (0=full, 100=starving)',
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labelNames: ['creature_id', 'creature_name', 'creature_type'],
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registers: [register],
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});
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const happinessGauge = new client.Gauge({
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name: 'tamagotchi_happiness_score',
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help: 'Current happiness score of each creature (0=miserable, 100=ecstatic)',
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labelNames: ['creature_id', 'creature_name', 'creature_type'],
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registers: [register],
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});
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const energyGauge = new client.Gauge({
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name: 'tamagotchi_energy_level',
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help: 'Current energy level of each creature (0=exhausted, 100=hyperactive)',
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labelNames: ['creature_id', 'creature_name', 'creature_type'],
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registers: [register],
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});
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const aliveGauge = new client.Gauge({
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name: 'tamagotchi_creatures_alive_total',
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help: 'Total number of creatures currently alive',
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registers: [register],
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});
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const deadGauge = new client.Gauge({
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name: 'tamagotchi_creatures_dead_total',
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help: 'Total number of creatures that have died',
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registers: [register],
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});
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const feedCounter = new client.Counter({
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name: 'tamagotchi_feed_actions_total',
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help: 'Total number of feed actions performed',
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labelNames: ['creature_type'],
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registers: [register],
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});
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const playCounter = new client.Counter({
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name: 'tamagotchi_play_actions_total',
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help: 'Total number of play actions performed',
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labelNames: ['creature_type'],
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registers: [register],
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});
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const sleepCounter = new client.Counter({
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name: 'tamagotchi_sleep_actions_total',
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help: 'Total number of sleep actions performed',
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labelNames: ['creature_type'],
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registers: [register],
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});
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const httpRequestDuration = new client.Histogram({
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name: 'tamagotchi_http_request_duration_seconds',
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help: 'Duration of HTTP requests in seconds',
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labelNames: ['method', 'route', 'status_code'],
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buckets: [0.01, 0.05, 0.1, 0.5, 1, 5],
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registers: [register],
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});
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const httpRequestsTotal = new client.Counter({
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name: 'tamagotchi_http_requests_total',
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help: 'Total number of HTTP requests',
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labelNames: ['method', 'route', 'status_code'],
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registers: [register],
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});
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// HTTP metrics middleware
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app.use((req, res, next) => {
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const start = Date.now();
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res.on('finish', () => {
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const duration = (Date.now() - start) / 1000;
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const route = req.route ? req.route.path : req.path;
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httpRequestDuration.observe({ method: req.method, route, status_code: res.statusCode }, duration);
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httpRequestsTotal.inc({ method: req.method, route, status_code: res.statusCode });
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});
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next();
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});
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// ============================================================================
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// Database Setup
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// ============================================================================
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const pool = new Pool({
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host: process.env.DB_HOST || 'localhost',
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port: parseInt(process.env.DB_PORT || '5432'),
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database: process.env.DB_NAME || 'tamagotchi',
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user: process.env.DB_USER || 'tamagotchi',
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password: process.env.DB_PASSWORD || 'tamagotchi123',
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});
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async function initDB() {
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const client = await pool.connect();
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try {
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await client.query(`
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CREATE TABLE IF NOT EXISTS creatures (
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id UUID PRIMARY KEY,
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name VARCHAR(50) NOT NULL,
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type VARCHAR(20) NOT NULL DEFAULT 'egg',
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hunger FLOAT NOT NULL DEFAULT 50,
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happiness FLOAT NOT NULL DEFAULT 70,
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energy FLOAT NOT NULL DEFAULT 80,
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is_alive BOOLEAN NOT NULL DEFAULT true,
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created_at TIMESTAMP DEFAULT NOW(),
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last_interaction TIMESTAMP DEFAULT NOW()
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)
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`);
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// Seed some default creatures if table is empty
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const { rows } = await client.query('SELECT COUNT(*) FROM creatures');
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if (parseInt(rows[0].count) === 0) {
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const seedCreatures = [
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{ name: 'Pixel', type: 'dragon' },
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{ name: 'Nimbus', type: 'cat' },
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{ name: 'Sprocket', type: 'robot' },
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{ name: 'Blossom', type: 'plant' },
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{ name: 'Byte', type: 'alien' },
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];
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for (const c of seedCreatures) {
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await client.query(
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'INSERT INTO creatures (id, name, type, hunger, happiness, energy) VALUES ($1, $2, $3, $4, $5, $6)',
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[uuidv4(), c.name, c.type, 30 + Math.random() * 40, 50 + Math.random() * 40, 60 + Math.random() * 30]
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);
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}
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console.log('🐣 Seeded 5 default creatures');
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}
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} finally {
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client.release();
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}
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}
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// ============================================================================
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// Creature Decay Loop — Stats decrease over time!
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// ============================================================================
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const DECAY_INTERVAL_MS = parseInt(process.env.DECAY_INTERVAL_MS || '15000'); // every 15 seconds
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const HUNGER_DECAY = parseFloat(process.env.HUNGER_DECAY || '2'); // hunger increases by 2
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const HAPPINESS_DECAY = parseFloat(process.env.HAPPINESS_DECAY || '1.5'); // happiness decreases by 1.5
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const ENERGY_DECAY = parseFloat(process.env.ENERGY_DECAY || '1'); // energy decreases by 1
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setInterval(async () => {
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try {
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const client = await pool.connect();
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try {
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// Increase hunger, decrease happiness and energy for alive creatures
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await client.query(`
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UPDATE creatures
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SET
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hunger = LEAST(100, hunger + $1),
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happiness = GREATEST(0, happiness - $2),
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energy = GREATEST(0, energy - $3),
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is_alive = CASE
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WHEN hunger >= 100 AND happiness <= 0 THEN false
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ELSE is_alive
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END
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WHERE is_alive = true
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`, [HUNGER_DECAY, HAPPINESS_DECAY, ENERGY_DECAY]);
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// Update Prometheus metrics
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const { rows } = await client.query('SELECT * FROM creatures');
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let alive = 0, dead = 0;
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for (const c of rows) {
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const labels = { creature_id: c.id, creature_name: c.name, creature_type: c.type };
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hungerGauge.set(labels, c.hunger);
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happinessGauge.set(labels, c.happiness);
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energyGauge.set(labels, c.energy);
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if (c.is_alive) alive++; else dead++;
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}
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aliveGauge.set(alive);
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deadGauge.set(dead);
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} finally {
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client.release();
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}
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} catch (err) {
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console.error('Decay loop error:', err.message);
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}
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}, DECAY_INTERVAL_MS);
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// ============================================================================
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// API Routes
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// ============================================================================
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// Health check
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app.get('/health', (req, res) => {
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res.json({ status: 'ok', timestamp: new Date().toISOString() });
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});
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// Prometheus metrics endpoint
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app.get('/metrics', async (req, res) => {
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try {
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res.set('Content-Type', register.contentType);
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res.end(await register.metrics());
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} catch (err) {
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res.status(500).end(err.message);
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}
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});
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// GET /creatures — List all creatures
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app.get('/api/creatures', async (req, res) => {
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try {
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const { rows } = await pool.query('SELECT * FROM creatures ORDER BY created_at ASC');
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res.json(rows);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// GET /creatures/:id — Get a specific creature
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app.get('/api/creatures/:id', async (req, res) => {
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try {
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const { rows } = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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if (rows.length === 0) return res.status(404).json({ error: 'Creature not found' });
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res.json(rows[0]);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// POST /creatures — Adopt a new creature
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app.post('/api/creatures', async (req, res) => {
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try {
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const { name, type } = req.body;
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if (!name || !type) return res.status(400).json({ error: 'name and type are required' });
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const allowedTypes = ['dragon', 'cat', 'robot', 'plant', 'alien'];
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if (!allowedTypes.includes(type)) {
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return res.status(400).json({ error: `type must be one of: ${allowedTypes.join(', ')}` });
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}
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const id = uuidv4();
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await pool.query(
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'INSERT INTO creatures (id, name, type) VALUES ($1, $2, $3)',
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[id, name, type]
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);
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const { rows } = await pool.query('SELECT * FROM creatures WHERE id = $1', [id]);
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res.status(201).json(rows[0]);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// POST /creatures/:id/feed — Feed a creature
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app.post('/api/creatures/:id/feed', async (req, res) => {
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try {
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const { rows } = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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if (rows.length === 0) return res.status(404).json({ error: 'Creature not found' });
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if (!rows[0].is_alive) return res.status(400).json({ error: 'Cannot feed a dead creature 💀' });
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await pool.query(
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'UPDATE creatures SET hunger = GREATEST(0, hunger - 25), happiness = LEAST(100, happiness + 5), last_interaction = NOW() WHERE id = $1',
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[req.params.id]
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);
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feedCounter.inc({ creature_type: rows[0].type });
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const result = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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res.json({ message: `${result.rows[0].name} has been fed! 🍖`, creature: result.rows[0] });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// POST /creatures/:id/play — Play with a creature
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app.post('/api/creatures/:id/play', async (req, res) => {
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try {
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const { rows } = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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if (rows.length === 0) return res.status(404).json({ error: 'Creature not found' });
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if (!rows[0].is_alive) return res.status(400).json({ error: 'Cannot play with a dead creature 💀' });
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await pool.query(
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'UPDATE creatures SET happiness = LEAST(100, happiness + 20), energy = GREATEST(0, energy - 10), hunger = LEAST(100, hunger + 5), last_interaction = NOW() WHERE id = $1',
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[req.params.id]
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);
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playCounter.inc({ creature_type: rows[0].type });
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const result = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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res.json({ message: `${result.rows[0].name} had a great time! 🎮`, creature: result.rows[0] });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// POST /creatures/:id/sleep — Put a creature to sleep
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app.post('/api/creatures/:id/sleep', async (req, res) => {
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try {
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const { rows } = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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if (rows.length === 0) return res.status(404).json({ error: 'Creature not found' });
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if (!rows[0].is_alive) return res.status(400).json({ error: 'This creature is already in eternal sleep 💀' });
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await pool.query(
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'UPDATE creatures SET energy = LEAST(100, energy + 30), hunger = LEAST(100, hunger + 5), last_interaction = NOW() WHERE id = $1',
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[req.params.id]
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);
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sleepCounter.inc({ creature_type: rows[0].type });
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const result = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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res.json({ message: `${result.rows[0].name} is well rested! 💤`, creature: result.rows[0] });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// POST /creatures/:id/revive — Revive a dead creature (admin only concept)
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app.post('/api/creatures/:id/revive', async (req, res) => {
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try {
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const { rows } = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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if (rows.length === 0) return res.status(404).json({ error: 'Creature not found' });
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if (rows[0].is_alive) return res.status(400).json({ error: 'This creature is already alive!' });
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await pool.query(
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'UPDATE creatures SET is_alive = true, hunger = 50, happiness = 50, energy = 50, last_interaction = NOW() WHERE id = $1',
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[req.params.id]
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);
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const result = await pool.query('SELECT * FROM creatures WHERE id = $1', [req.params.id]);
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res.json({ message: `${result.rows[0].name} has been revived! ✨`, creature: result.rows[0] });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// GET /stats — Global statistics
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app.get('/api/stats', async (req, res) => {
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try {
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const { rows } = await pool.query(`
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SELECT
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COUNT(*) FILTER (WHERE is_alive = true) as alive_count,
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COUNT(*) FILTER (WHERE is_alive = false) as dead_count,
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ROUND(AVG(hunger)::numeric, 1) FILTER (WHERE is_alive = true) as avg_hunger,
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ROUND(AVG(happiness)::numeric, 1) FILTER (WHERE is_alive = true) as avg_happiness,
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ROUND(AVG(energy)::numeric, 1) FILTER (WHERE is_alive = true) as avg_energy,
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COUNT(*) FILTER (WHERE hunger > 80 AND is_alive = true) as starving_count,
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COUNT(*) FILTER (WHERE happiness < 20 AND is_alive = true) as sad_count
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FROM creatures
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`);
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res.json(rows[0]);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// ============================================================================
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// Start Server
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// ============================================================================
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const PORT = parseInt(process.env.PORT || '8080');
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initDB()
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.then(() => {
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app.listen(PORT, '0.0.0.0', () => {
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console.log(`🐣 Tamagotchi API running on port ${PORT}`);
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console.log(`📊 Metrics available at /metrics`);
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console.log(`⏱️ Decay interval: ${DECAY_INTERVAL_MS}ms`);
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});
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})
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.catch((err) => {
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console.error('Failed to initialize database:', err);
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process.exit(1);
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});
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