add priceHistorical()

jprichardson · jprichardson · commit 90a4fab51158 · 2016-08-01T16:50:19.000-05:00
diff --git a/README.md b/README.md
@@ -7,8 +7,8 @@ cryptocompare
 
 [npm-image]: https://img.shields.io/npm/v/cryptocompare.svg?style=flat-square
 [npm-url]: https://www.npmjs.com/package/cryptocompare
-[travis-image]: https://img.shields.io/travis/jprichardson/cryptocompare.svg?style=flat-square
-[travis-url]: https://travis-ci.org/jprichardson/cryptocompare
+[travis-image]: https://img.shields.io/travis/exodusmovement/cryptocompare.svg?style=flat-square
+[travis-url]: https://travis-ci.org/exodusmovement/cryptocompare
 [standard-image]: https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square
 [standard-url]: http://npm.im/standard
 
@@ -67,7 +67,11 @@ cc.coinList()
 Reference: https://www.cryptocompare.com/api/#-api-data-price-
 
 
- 
+### priceHistorical
+
+https://www.cryptocompare.com/api/#-api-data-pricehistorical-
+
+
 
 
 
diff --git a/index.js b/index.js
@@ -24,7 +24,16 @@ function price (fsym, tsyms, useBtc) {
   return fetchJSON(url)
 }
 
+function priceHistorical (fsym, tsyms, time) {
+  if (!Array.isArray(tsyms)) tsyms = [tsyms]
+  if (!time instanceof Date) throw new Error('time parameter must be an instance of Date.')
+  time = time.getTime() / 1000
+  var url = baseUrl + 'price?fsym=' + fsym + '&tsyms=' + tsyms.join(',') + '&ts=' + time
+  return fetchJSON(url)
+}
+
 module.exports = {
   coinList,
-  price
+  price,
+  priceHistorical
 }
diff --git a/test/cryptocompare.test.js b/test/cryptocompare.test.js
@@ -21,3 +21,15 @@ test('price()', function (t) {
     t.end()
   }).catch(t.end)
 })
+
+test('priceHistorical()', function (t) {
+  t.plan(4)
+  var oneYearAgo = new Date((Date.now() / 1000 - 31536000) * 1000)
+  cc.priceHistorical('BTC', ['USD', 'CNY'], oneYearAgo).then(prices => {
+    t.strictEqual(prices[0].Symbol, 'USD', 'prices[0].Symbol === USD')
+    t.strictEqual(typeof prices[0].Price, 'number', 'prices[0].Price is a number')
+    t.strictEqual(prices[1].Symbol, 'CNY')
+    t.strictEqual(typeof prices[1].Price, 'number')
+    t.end()
+  }).catch(t.end)
+})
