Add realtime BTC price in menu bar

src/app/components/Coin.jsx

@@ -1,12 +1,18 @@
 import React from 'react'
 import classNames from 'classnames'
 
+const { ipcRenderer } = window.require('electron')
+
 import CoinStore from '../stores/CoinStore'
 import CurrencyStore from '../stores/CurrencyStore'
 
 import * as CoinUtil from '../utils/coin'
 import * as FormatUtil from '../utils/format'
 
+function updateTitle (price, currency) {
+  ipcRenderer.send('update-btc-price', `${price} ${currency}`)
+}
+
 export default class Coin extends React.Component {
   constructor (props) {
     super(props)
@@ -62,8 +68,7 @@ export default class Coin extends React.Component {
 
     const { shouldFlash, selectedCurrency, selectedCurrencyValue } = this.state
     const { long, short, price, perc, volume, cap24hrChange } = this.state.coin
-    let safePrice = price
-    if (isNaN(price)) safePrice = 0
+    const safePrice = isNaN(price) ? 0 : price
 
     const iconClass = CoinUtil.getCoinClass(short)
     const positiveChangeInPrice = FormatUtil.isPositive(perc)
@@ -95,8 +100,10 @@ export default class Coin extends React.Component {
     const formattedChangeInPercentage = FormatUtil.getFormattedPercentage(perc)
     const formattedVolume = FormatUtil.getFormattedVolume(volume)
 
+    if (short === 'BTC') updateTitle(formattedCurrencyPrice, selectedCurrency)
+
     return (
-      <li className={listClass} ref={(ref) => this.coinRef = ref}>
+      <li className={listClass} ref={(ref) => { this.coinRef = ref }}>
         <i className={iconClass} />
         <div className='media-body'>
           <strong>

src/main.js

@@ -19,6 +19,14 @@ if (platform === 'darwin' || platform === 'win32') {
   })
 
   mb.on('after-create-window', () => mb.window.setResizable(false))
+
+  app.on('ready', () => {
+    mb.tray.setTitle('Donut')
+
+    ipcMain.on('update-btc-price', (event, price) => {
+      mb.tray.setTitle(price)
+    })
+  })
 } else {
   const { BrowserWindow } = require('electron')
 
@@ -39,6 +47,4 @@ if (platform === 'darwin' || platform === 'win32') {
   })
 }
 
-ipcMain.on('quit', () => {
-  app.quit()
-})
+ipcMain.on('quit', () => app.quit())