Added Bitcoin to ISK endpoint

endpoints/btc/documentation.md

@@ -0,0 +1,9 @@
+# Bitcoin to ISK price
+
+Source [Myntkaup.is](https://myntkaup.is)
+
+-  GET [/btc](https://apis.is/btc)
+
+Current Bitcoin to ISK exchange rate.
+
+---

endpoints/btc/index.js

@@ -0,0 +1,41 @@
+const request = require('request')
+const app = require('../../server')
+
+// set cache time to 10 secs
+const cacheTime = 10
+
+function queryGzipJson(url, callback) {
+  const headers = {
+    'user-agent': 'apis.is',
+  }
+  request.get({
+    headers,
+    url,
+    gzip: true,
+    json: true,
+  }, (error, response, data) => {
+    if (error || response.statusCode !== 200) {
+      callback(error, response, null)
+    }
+    callback(error, response, data)
+  })
+}
+
+function queryRate(callback) {
+  queryGzipJson('https://myntkaup.is/api/assets/bitcoin', callback)
+}
+
+function standardErrorResponse(res) {
+  return res.status(500).json({
+    error: 'myntkaup.is refuses to respond or give back data',
+  })
+}
+
+app.get('/btc', (req, res) => {
+  queryRate((error, response, data) => {
+    if (error || response.statusCode !== 200) {
+      return standardErrorResponse(res)
+    }
+    return res.cache(cacheTime).json({results: [data]})
+  })
+})

endpoints/btc/tests/integration_test.js

@@ -0,0 +1,32 @@
+/* eslint-disable no-bitwise */
+/* eslint-disable import/first */
+/* eslint-disable import/extensions */
+const fs = require('fs')
+const request = require('request')
+const nock = require('nock')
+const helpers = require('../../../lib/test_helpers.js')
+
+describe('btc', () => {
+  const rateTypes = {
+    id: String,
+    symbol: String,
+    currencySymbol: String,
+    rateUsd: Number,
+    rateIsk: Number,
+    rateIskFriendly: String,
+    timestamp: Number
+  }
+  const fieldsToCheckFor = Object.keys(rateTypes)
+
+  before(() => {
+    nock('https://myntkaup.is')
+      .get('/api/assets/bitcoin')
+      .reply(200, fs.readFileSync(`${__dirname}/myntkaup.fixture`))
+  })
+
+  it('should return object containing specific fields with correct types', (done) => {
+    const params = helpers.testRequestParams('/btc')
+    const resultHandler = helpers.testRequestHandlerForFields(done, fieldsToCheckFor)
+    request(params, resultHandler)
+  })
+})

endpoints/btc/tests/myntkaup.fixture

@@ -0,0 +1,9 @@
+{
+  "id": "bitcoin",
+  "symbol": "BTC",
+  "currencySymbol": "₿",
+  "rateUsd": 4040.7933255406665,
+  "rateIsk": 472287.6491152461,
+  "rateIskFriendly": "472.287kr.",
+  "timestamp": 1553041842635
+}