feat: app educativa comarques de Catalunya v3
- 6 nivells de dificultat (flashcards, tria, uneix, escriu, mapa, mapa cec) - Registre de jugadors sense contrasenya (nom + emoji avatar) - Backend Node.js + Express + PostgreSQL (pg) - Mapa SVG interactiu amb dades GeoJSON reals (ICGC) - Filtre de comarques per jugador (muntanya, BCN, GI, LL, T, totes) - Estadistiques per nivell guardades a PostgreSQL - Panel d'administrador amb PIN - Manual integrat per a nens de 10-12 anys - Mode offline (fallback sense backend) - Deploy: Docker + Nginx + Let's Encrypt a Oracle Cloud ARM
This commit is contained in:
Jaume Garriga Maestre
213
server.js
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213
server.js
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const express = require('express');
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const { Pool } = require('pg');
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const path = require('path');
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const app = express();
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const PORT = parseInt(process.env.PORT || '3003');
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const ADMIN_PIN = process.env.ADMIN_PIN || '1234';
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// ── Database ──────────────────────────────────────────────────────────────────
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// Requires env var DATABASE_URL with a valid PostgreSQL connection string.
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const pool = new Pool({ connectionString: process.env.DATABASE_URL });
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/**
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* Run schema migrations on startup.
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* CREATE TABLE IF NOT EXISTS is idempotent — safe to run every boot.
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*/
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async function initSchema() {
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await pool.query(`
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CREATE TABLE IF NOT EXISTS players (
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id SERIAL PRIMARY KEY,
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name TEXT NOT NULL,
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avatar TEXT NOT NULL,
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created_at TIMESTAMPTZ DEFAULT NOW()
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);
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CREATE TABLE IF NOT EXISTS sessions (
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id SERIAL PRIMARY KEY,
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player_id INTEGER NOT NULL REFERENCES players(id) ON DELETE CASCADE,
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level INTEGER NOT NULL,
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score INTEGER NOT NULL,
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total INTEGER NOT NULL,
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stars INTEGER NOT NULL,
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duration_seconds INTEGER NOT NULL DEFAULT 0,
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created_at TIMESTAMPTZ DEFAULT NOW()
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);
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CREATE INDEX IF NOT EXISTS idx_sessions_player ON sessions(player_id);
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CREATE INDEX IF NOT EXISTS idx_sessions_level ON sessions(player_id, level);
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`);
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console.log('✅ Schema ready');
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}
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// ── Middleware ────────────────────────────────────────────────────────────────
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app.use(express.json());
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app.use(express.static(path.join(__dirname, 'public')));
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// ── Helpers ───────────────────────────────────────────────────────────────────
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/**
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* Build per-level best-score stats from a flat sessions array.
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* @param {Array} sessions
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* @returns {Object} keyed by level 1–5
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*/
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function buildLevelStats(sessions) {
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const stats = {};
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for (let lvl = 1; lvl <= 5; lvl++) {
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const ls = sessions.filter(s => s.level === lvl);
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if (!ls.length) continue;
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const best = ls.reduce((b, s) => (s.score / s.total > b.score / b.total ? s : b));
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stats[lvl] = {
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played: ls.length,
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bestScore: best.score,
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bestTotal: best.total,
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bestPct: Math.round(best.score / best.total * 100),
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};
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}
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return stats;
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}
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// ── Routes ────────────────────────────────────────────────────────────────────
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// GET /api/health — also verifies DB connectivity
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app.get('/api/health', async (_req, res) => {
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try {
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await pool.query('SELECT 1');
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res.json({ ok: true });
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} catch {
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res.status(503).json({ ok: false });
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}
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});
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// GET /api/players
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app.get('/api/players', async (_req, res) => {
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try {
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const { rows } = await pool.query(
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'SELECT id, name, avatar, created_at FROM players ORDER BY name'
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);
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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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// POST /api/players { name, avatar }
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app.post('/api/players', async (req, res) => {
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const { name, avatar } = req.body ?? {};
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if (!name?.trim() || !avatar) {
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return res.status(400).json({ error: 'name i avatar són obligatoris' });
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}
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try {
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// Case-insensitive duplicate check
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const dup = await pool.query(
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'SELECT id FROM players WHERE lower(name) = lower($1)',
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[name.trim()]
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);
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if (dup.rows.length) {
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return res.status(409).json({ error: 'Ja existeix un jugador amb aquest nom' });
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}
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const { rows } = await pool.query(
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'INSERT INTO players (name, avatar) VALUES ($1, $2) RETURNING id, name, avatar',
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[name.trim(), avatar]
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);
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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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// GET /api/players/:id/stats
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app.get('/api/players/:id/stats', async (req, res) => {
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try {
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const playerRes = await pool.query(
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'SELECT id, name, avatar, created_at FROM players WHERE id = $1',
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[req.params.id]
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);
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if (!playerRes.rows.length) {
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return res.status(404).json({ error: 'Jugador no trobat' });
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}
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const player = playerRes.rows[0];
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const sessionRes = await pool.query(
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`SELECT level, score, total, stars, duration_seconds, created_at
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FROM sessions WHERE player_id = $1 ORDER BY created_at DESC`,
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[req.params.id]
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);
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const sessions = sessionRes.rows;
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const totalStars = sessions.reduce((s, r) => s + r.stars, 0);
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const totalSessions = sessions.length;
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const levelStats = buildLevelStats(sessions);
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const recent = sessions.slice(0, 10).map(s => ({
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level: s.level, score: s.score, total: s.total,
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stars: s.stars, date: s.created_at,
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}));
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res.json({ player, totalStars, totalSessions, levelStats, recent });
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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 /api/sessions { player_id, level, score, total, stars, duration_seconds? }
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app.post('/api/sessions', async (req, res) => {
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const { player_id, level, score, total, stars, duration_seconds = 0 } = req.body ?? {};
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if ([player_id, level, score, total, stars].some(v => v == null)) {
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return res.status(400).json({ error: 'Falten camps obligatoris' });
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}
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try {
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const playerRes = await pool.query(
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'SELECT id FROM players WHERE id = $1', [player_id]
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);
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if (!playerRes.rows.length) {
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return res.status(404).json({ error: 'Jugador no trobat' });
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}
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const { rows } = await pool.query(
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`INSERT INTO sessions (player_id, level, score, total, stars, duration_seconds)
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VALUES ($1, $2, $3, $4, $5, $6) RETURNING id`,
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[player_id, level, score, total, stars, duration_seconds]
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);
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res.status(201).json({ id: rows[0].id });
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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 /api/admin/stats Header: x-admin-pin
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app.get('/api/admin/stats', async (req, res) => {
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if (req.headers['x-admin-pin'] !== ADMIN_PIN) {
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return res.status(401).json({ error: 'PIN incorrecte' });
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}
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try {
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const { rows: players } = await pool.query(
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'SELECT id, name, avatar, created_at FROM players ORDER BY name'
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);
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// Fetch all sessions in one query to avoid N+1
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const { rows: allSessions } = await pool.query(
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`SELECT player_id, level, score, total, stars, created_at
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FROM sessions ORDER BY created_at DESC`
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);
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const full = players.map(p => {
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const sessions = allSessions.filter(s => s.player_id === p.id);
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const totalStars = sessions.reduce((s, r) => s + r.stars, 0);
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const levelStats = buildLevelStats(sessions);
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const lastActivity = sessions[0]?.created_at ?? null;
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return { ...p, totalSessions: sessions.length, totalStars, levelStats, lastActivity };
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});
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res.json(full);
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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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// ── Start ─────────────────────────────────────────────────────────────────────
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initSchema()
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.then(() => app.listen(PORT, '0.0.0.0', () =>
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console.log(`🏔️ Comarques API · port ${PORT} · PostgreSQL`)
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))
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.catch(err => {
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console.error('❌ DB init failed:', err.message);
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process.exit(1);
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});
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