[Added tooltips] [IPC constants]

src/App.js

@@ -1,5 +1,4 @@
 import React, {Component} from 'react';
-import * as Constants from './constants';
 import axios from 'axios';
 import styles from './App.css';
 import Box from './components/UI/Box/Box';
@@ -15,6 +14,7 @@ import MountItems from './containers/MountItems/MountItems';
 import UpgradeIcon from './components/UpgradeIcon/UpgradeIcon';
 import UpgradeUI from './components/UpgradeUI/UpgradeUI';
 
+const Constants = require('./constants');
 const Scheduler = require('node-schedule');
 
 let ipcRenderer = null;
@@ -399,18 +399,7 @@ class App extends Component {
   };
   
   onGrabReleasesReply = ()=> {
-    axios.get(Constants.RELEASES_URL)
-    .then(response => {
-      const versionLookup = {
-        Alpha: response.data.Versions.Alpha[this.state.Platform],
-        Beta: response.data.Versions.Beta[this.state.Platform],
-        RC: response.data.Versions.RC[this.state.Platform],
-        Release: response.data.Versions.Release[this.state.Platform],
-      };
-      const locationsLookup = {
-        ...response.data.Locations[this.state.Platform],
-      };
-
+    const doUpdate = (locationsLookup, versionLookup) => {
       const latestVersion = versionLookup[this.state.ReleaseTypes[this.state.Release]].length - 1;
       let version = this.state.Version;
       if (version === -1) {
@@ -424,9 +413,40 @@ class App extends Component {
         VersionAvailable: version !== latestVersion,
         VersionLookup: versionLookup,
       });
+
       this.checkVersionInstalled(this.state.Release, version, versionLookup);
+    };
+
+    axios.get(Constants.RELEASES_URL)
+    .then(response => {
+      const versionLookup = {
+        Alpha: response.data.Versions.Alpha[this.state.Platform],
+        Beta: response.data.Versions.Beta[this.state.Platform],
+        RC: response.data.Versions.RC[this.state.Platform],
+        Release: response.data.Versions.Release[this.state.Platform],
+      };
+      const locationsLookup = {
+        ...response.data.Locations[this.state.Platform],
+      };
+
+      window.localStorage.setItem('releases', JSON.stringify({
+        LocationsLookup: locationsLookup,
+        VersionLookup: versionLookup
+      }));
+
+      doUpdate(locationsLookup, versionLookup);
     }).catch(error => {
       console.log(error);
+      const releases = window.localStorage.getItem('releases');
+      if (releases && (releases.length > 0)) {
+        const obj = JSON.parse(releases);
+        const locationsLookup = obj.LocationsLookup;
+        const versionLookup = obj.VersionLookup;
+
+        doUpdate(locationsLookup, versionLookup);
+      } else {
+        // TODO Handle error
+      }
     });
   };
   
@@ -446,6 +466,10 @@ class App extends Component {
       }
     }).catch(error => {
       console.log(error);
+      this.setState({
+        UpgradeAvailable: false,
+        UpgradeData: {},
+      });
     });
   };
   
@@ -648,7 +672,7 @@ class App extends Component {
           <table cellPadding={0}
                  cellSpacing={0}
                  style={{margin: 0, padding: 0}}
-                 width="100%">
+                 width='100%'>
             <tbody style={{margin: 0, padding: 0}}>
               <tr style={{margin: 0, padding: 0}}>
                 <td style={{margin: 0, padding: 0}}