72 lines
1.7 KiB
JavaScript
72 lines
1.7 KiB
JavaScript
const http = require('http');
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const LimitedArray = require('limitedarray');
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const trend = require('trend');
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const logger = require('log4js').getLogger('fx');
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const delay = 2764800; // 32 days divided by 1000
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let fxCache = {};
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let history = new LimitedArray(48); // one days worth in 5 minute chunks
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function getFx() {
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logger.info('FX request');
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function fxQuery(callback) {
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let options = {
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host: 'openexchangerates.org',
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// port: 80,
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path: '/api/latest.json?app_id=0eb932cee3bc40259f824d4b4c96c7d2',
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// method: 'GET',
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headers: { }
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};
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http.request(options).on('response', response => {
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let data = '';
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response.on('data', chunk => {
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data += chunk;
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});
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response.on('end', () => {
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logger.info('Data done...');
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callback(JSON.parse(data));
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});
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response.on('error', e => {
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logger.error(e);
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});
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}).end();
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}
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fxQuery(a => {
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logger.info('Got FX data. Storing it');
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fxCache = a;
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let minRates = {USD:fxCache.rates.USD, GBP:fxCache.rates.GBP, SEK:fxCache.rates.SEK};
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fxCache.rates = minRates;
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history.push(a.rates.GBP);
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fxCache.history = history.get();
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fxCache.trend = trend(fxCache.history, {avgPoints: 12});
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});
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}
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function updateFX() {
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logger.warn('updateBitcoin');
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const now = new Date();
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if (now.getTime() > 1505696400000)
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getFx();
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const mod = delay - (now.getTime() % delay);
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let fxUpdateFn = () => {
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updateFX();
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};
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setTimeout(fxUpdateFn.bind(this), mod + 10);
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}
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updateFX();
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exports.doFx = (req, res) => {
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logger.info('FX request');
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res.setHeader('Content-Type', 'application/json');
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res.end(JSON.stringify(fxCache));
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};
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