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44 lines
1.1 KiB
JavaScript
44 lines
1.1 KiB
JavaScript
var Promise, bhttp, expireTime, lastRateCheck, lastRates;
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Promise = require("bluebird");
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bhttp = require("bhttp");
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lastRates = null;
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lastRateCheck = 0;
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expireTime = 5 * 60 * 1000;
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module.exports = function(cacheExpiration) {
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return Promise["try"](function() {
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if (Date.now() > lastRateCheck + expireTime) {
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return Promise["try"](function() {
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return Promise.all([
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bhttp.get("http://api.fixer.io/latest", {
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decodeJSON: true
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}), bhttp.get("https://blockchain.info/ticker", {
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decodeJSON: true
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})
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]);
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}).spread(function(fixerRates, blockchainRates) {
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var eurRates;
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eurRates = fixerRates.body.rates;
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eurRates.BTC = 1 / blockchainRates.body.EUR["15m"];
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return eurRates;
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}).then(function(rates) {
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lastRates = rates;
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lastRateCheck = Date.now();
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if (cacheExpiration != null) {
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expireTime = cacheExpiration * 1000;
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}
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return rates;
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})["catch"](function(err) {
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return lastRates;
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});
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} else {
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return lastRates;
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}
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});
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};
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