pHQnfjmU

1/**
2 *  This script uses a stock market API
3 *  to display real-time stock market info
4 *  on the Touch Bar using BetterTouchTool.
5 *
6 *  Note:
7 *      Axios must be installed wherever
8 *      this JavaScript file is located.
9 *      (i.e. `npm install axios`)
10 */
11
12// Import axios (handles API requests)
13const axios = require('axios');
14
15// Configuration
16const params = {
17    symbol: 'AAPL',      // Select the stock you want to track
18    token: ''       	// Get an API token from https://finnhub.io/register
19};
20
21// Form a request URL with search params
22const APIEndpoint = new URL('https://finnhub.io/api/v1/quote');
23for (const key in params)
24    APIEndpoint.searchParams.append(key, params[key]);
25const requestURL = APIEndpoint.href;
26
27// Axios: execute GET request
28axios.get(requestURL).then(result => {
29    const data = result.data;
30
31    // Extract properties from API request result (Object)
32    let current = data.c,       // current price
33        high = data.h,          // high
34        low = data.l,           // low
35        open = data.o,          // open
36        prevClose = data.pc,    // previous close
37        time = data.t;          // timestamp
38
39    // Calculate new values
40    let todayPercentChange = current - open / open * 100;
41
42    // Format values for ouput (use 2 decimal places)
43    const decimalPlaces = 2;
44    current = parseFloat(current).toFixed(decimalPlaces);
45    todayPercentChange = parseFloat(todayPercentChange).toFixed(decimalPlaces);
46
47    // Insert conditoinal symbols for clarity
48    let positiveSymbol = '';
49    if (todayPercentChange > 0) positiveSymbol = '+';
50
51    // Display formatted stock info on touch bar
52    const returnToBTT = `${params.symbol}: $${current} (${positiveSymbol}${todayPercentChange}\%)`;
53    console.log(returnToBTT);   // AAPL: $273.60 (+173.60%)
54});