bitcoinwisdom ticker: initial commit

1 files changed, 84 insertions, 0 deletions

diff --git a/gold/bitcoinwisdom/ticker.js b/gold/bitcoinwisdom/ticker.js
new file mode 100644
index 00000000..95861229
--- /dev/null
+++ b/gold/bitcoinwisdom/ticker.js
@@ -0,0 +1,84 @@
+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 ticker = data.btceltcbtc
+  var last_ticker = last_data.btceltcbtc
+
+  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_left(lag, 2, '0'),
+      'btceltcbtc',
+      '[' + diff_color(diff) + 'm' + ticker.last + '',
+      lag,
+      freq,
+    ];
+
+    console.log(out.join(' '));
+
+    beeper.beep(freq, 10);
+  }
+
+  last_data.btceltcbtc = data.btceltcbtc;
+}
+
+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')
+}
+
+function pad_left (obj, num, char) {
+  var str = obj.toString();
+  while (str.length < num) {
+    str += char;
+  }
+  return str;
+}