Arjun Patel
65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
var app = require('express')();
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var server = require('http').Server(app);
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var io = require('socket.io')(server);
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var mysql = require('mysql');
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var con = mysql.createConnection({
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host: 'localhost',
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user: 'root',
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password: 'mysql',
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database: 'nexto'
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});
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var port = process.env.PORT || 3000;
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server.listen(port, () => console.log('serving on port: ' + port));
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app.get('/', function (req, res) {
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res.sendFile(__dirname + '/index.html');
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});
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io.on('connection', function (socket) {
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console.log('Client connected: ' + socket.id);
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socket.on('initial', (position) => {
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console.log(position.long + ' ' + position.lat);
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//var sql = 'select * from messages where lng = 0';
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var sql = 'SELECT * FROM messages HAVING (6371393 * acos(cos(radians((?))) * cos(radians(lat)) * cos(radians(lng) - radians((?))) + sin(radians((?))) * sin(radians(lat))) < 100) ORDER BY id;'
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con.query(sql, [position.lat, position.long, position.lat], function (err, result, fields) {
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if (err) throw err;
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socket.emit('initMessages', result);
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console.log('sent all initial messages');
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});
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});
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//io.on('test', () => console.log('worked~')); // test with web page
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socket.on('newMessage', function(msg) {
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var sql = "INSERT INTO messages (userId, text, createdAt, lng, lat) VALUES (?, ?, ?, ?, ?)";
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var currTime = new Date().toString();
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con.query(sql, [msg.userId, msg.text, currTime, msg.lng, msg.lat], function(err, result) {
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if (err) throw err;
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console.log('Message sent to db!');
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var msgId = 0;
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con.query('SELECT LAST_INSERT_ID()', function(err, result) {
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if(err) throw err;
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msgId = result;
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console.log(msgId);
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});
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var uploadedMsg = {
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id: msgId,
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userId: msg.userId,
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text: msg.text,
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createdAt: currTime,
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lng: msg.lng,
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lat: msg.lat
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};
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io.emit('newMessage', uploadedMsg);
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});
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});
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socket.on('disconnect', function() {
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console.log('Client disconnected: ' + socket.id);
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});
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});
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