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index.js
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index.js
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const express = require('express');
const path = require('path');
const bodyParser = require('body-parser');
const app = express();
const port = 3000;
// BD INIT
const Sequelize = require('sequelize');
const sequelize = new Sequelize({
dialect: 'sqlite',
storage: './database'
});
// BD MODEL
const Player = sequelize.define('players', {
id: {type: Sequelize.SMALLINT, primaryKey: true},
name: Sequelize.STRING,
team: Sequelize.STRING,
score: Sequelize.NUMBER
}, {
timestamps: true
})
// BD LOAD DATA
Player.sync({force: true}).then(() => {
// Table created
Player.create({
name: 'Peter',
team: 'Pandas',
score: 1
});
Player.create({
name: 'Jhon',
team: 'Cobrakay',
score: 10
});
Player.create({
name: 'Tommy',
team: 'Space',
score: 20
});
});
// Middlewares
app.use( bodyParser.json() );
// PUBLIC ROUTE
app.use(express.static('./public'));
// ROUTES
app.get('/', (req, res) => {
res.sendFile(path.join(__dirname, 'src', 'index.html'));
});
// API
app.get('/players', (req, res) => {
setTimeout(() => {
Player.findAll({ order: [['score', 'DESC']], raw: true })
.then( players => res.json({ "status": "ok", "data": players }))
.catch(err => res.json({ "status": "ko"}));
}, 2000);
});
app.post('/players', (req, res) => {
setTimeout(() => {
Player.sync().then(() => {
const { name, team, score } = req.body;
Player.create({
name: name,
team: team,
score: score
});
res.status(200).json({
"status": "ok",
"data": {
"name": name,
"team": team,
"score": score
}
})
});
}, 2000);
});
app.delete('/players/:id', (req, res) => {
setTimeout(() => {
Player.destroy({ where: { id: req.params.id } })
res.status(200).json({"status": "ok"})
}, 2000);
})
// RUN
sequelize
.authenticate()
.then(() => { console.log('BD Connection has been established successfully.'); })
.catch(err => { console.error('Unable to connect to the database:', err); });
const server = app.listen(port, () => console.log(`Express started on port ${port}!`));
// cron score updater
const cron = require('node-cron');
const task = cron.schedule('*/5 * * * * *', () => {
Player.findOne({ order: sequelize.random() }).then( (player) => {
player.update({ score: player.get('score') + 12 })
});
});
task.start();
// Get Player and socket emit
const getApiAndEmit = socket => {
const streamTask = cron.schedule('*/10 * * * * *', () => {
Player.findAll({ raw: true }).then( players => {
socket.emit("update/players", players);
})
})
streamTask.start()
socket.on("disconnect", () => {
streamTask.stop()
console.log("Client disconnected");
});
};
// SOCKET
require('./io')(server, getApiAndEmit);