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var http = require('http');
var beeper = require('./beep.js').create_beeper();
setInterval(get_ticker, 1000);
function get_ticker () {
http.get('http://s1.bitcoinwisdom.com:8080/ticker', ticker_response_handler);
}
function ticker_response_handler (res) {
var data = '';
res.on('data', function (chunk) {
data += chunk;
});
res.on('end', function () {
try {
data = JSON.parse(data);
} catch (err) {
return console.log('Error:', err);
}
ticker_data_handler(data);
});
}
var last_data = {
btceltcbtc: {
last: 0, // price
date: 0,
tid: 0,
},
}
function ticker_data_handler (data) {
//console.log(data)
var symbol = 'btceltcbtc'
var ticker = data[symbol]
var last_ticker = last_data[symbol]
if (ticker.date !== last_ticker.date) {
var diff = ticker.last - last_ticker.last;
var lag = data.now - ticker.date;
freq = (2000 + 1000000 * diff) | 0;
var out = [
format_date(data.now) + '+' + pad(lag, -2, '0'),
symbol,
'\x1b[' + diff_color(diff) + 'm'
+ ticker.last.toFixed(8)
+ '\x1b[m',
lag,
freq,
];
console.log(out.join(' '));
beeper.beep(freq, 10);
}
last_data[symbol] = data[symbol];
}
function diff_color (diff) {
if (diff < 0) {
return '31;1';
} else if (diff > 0) {
return '32;1';
} else {
return '33;1';
}
}
function format_date (unix) {
return (new Date(unix * 1000)).toISOString()
.replace(/\.000Z$/, 'Z')
}
// num < 0: pad left
// num > 0: pad right
function pad (obj, num, char) {
var str = obj.toString();
if (num < 0) {
while (str.length < -num) {
str = char + str;
}
} if (num > 0) {
while (str.length < num) {
str = str + char;
}
}
return str;
}
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