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index.js
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index.js
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const express = require('express');
const async = require('async');
const http = require('http');
const path = require('path');
const fs = require('fs');
const WebSocket = require('ws');
const winston = require('winston');
const request = require('request');
const yaml = require('js-yaml');
var expressHandlebars = require('express-handlebars');
const Capture = require('./lib/capture');
const ImageProcessor = require('./lib/image-modifier');
winston.configure({
level: 'debug',
transports: [
new winston.transports.Console({ timestamp: true })
]
});
let customConfig = {};
try {
if (fs.existsSync('./config.yaml')) {
customConfig = yaml.safeLoad(fs.readFileSync('./config.yaml'));
}
}
catch (err) {
winston.error('Could not read configuration', err);
process.exit(1);
}
const defaultConfig = {
server: {
port: 3000
},
camera: {
numberOfPhotos: 3,
delay: 3,
keepPhotosOnCamera: true
},
processing: {
width: 1280,
height: 800
},
app: {
title: 'My Photo Reel'
}
}
var config = {};
Object.assign(config, defaultConfig, customConfig);
const app = express();
const server = http.createServer(app);
const wss = new WebSocket.Server({ server });
const port = config.server.port;
app.engine('handlebars', expressHandlebars({}));
app.set('view engine', 'handlebars');
app.use(express.static('public'));
app.get('/', function (req, res) {
res.render('index', { title: config.app.title });
});
app.get('/control', function (req, res) {
res.render('control', { numberOfPhotos: config.camera.numberOfPhotos });
});
wss.broadcast = function broadcast(data) {
wss.clients.forEach(function each(client) {
if (client.readyState === WebSocket.OPEN) {
client.send(data);
}
});
};
const capture = new Capture(config.camera.keepPhotosOnCamera, '/tmp/');
let options = {
width: config.processing.width || 1020
};
const processor = new ImageProcessor(options);
wss.on('connection', (ws, req) => {
winston.info('Client connected to socket');
ws.on('message', (message) => {
winston.info('Client sent ', message);
var parsedMsg = JSON.parse(message);
switch (parsedMsg.type) {
case 'trigger-capture': {
winston.info('Triggering capture');
capture.capture(config.camera.numberOfPhotos, config.camera.delay, (err, paths) => {
if (err) {
winston.error('Could not capture images', err);
return;
}
winston.debug('Images captured to', paths);
async.mapSeries(paths,
function (originalImagePath, callback) {
const destination = path.join(__dirname, 'public/images', path.basename(originalImagePath));
processor.shrink(originalImagePath, destination, callback);
},
function (err, newPaths) {
if (err) {
winston.error('Unable to resize images', err);
return;
}
winston.debug('Images resized', newPaths);
const relativePaths = newPaths.map(p => path.relative(path.join(__dirname, 'public'), p));
wss.broadcast(JSON.stringify({ type: 'new-images', data: relativePaths }));
wss.broadcast(JSON.stringify({ type: 'captured-images', data: relativePaths }));
});
});
break;
}
case 'get-all-images': {
fs.readdir(path.join(__dirname, 'public/images'), (err, files) => {
let images = files.map(f => path.join('images', f));
ws.send(JSON.stringify({ type: 'new-images', data: images }));
})
break;
}
default: break;
}
});
ws.send(JSON.stringify({ type: 'text', data: 'message from server' }));
});
server.listen(port, () => {
winston.info('Listening on %d', server.address().port);
});