update checker (fixes #166, #99)

terminus-core/src/components/appRoot.component.pug

@@ -39,6 +39,13 @@ title-bar(
                 (click)='button.click()',
             )
                 i.fa([class]='"fa fa-" + button.icon')
+            button.btn.btn-secondary.btn-tab-bar(
+                *ngIf='appUpdate',
+                title='Update available',
+                (click)='updateApp()',
+            )
+                i.fa.fa-arrow-up.text-info
+                span.text-info Update
 
         window-controls(
             *ngIf='config.store.appearance.frame == "thin" && (hostApp.platform == Platform.Windows || hostApp.platform == Platform.Linux)',

terminus-core/src/components/appRoot.component.ts

@@ -10,6 +10,7 @@ import { ConfigService } from '../services/config.service'
 import { DockingService } from '../services/docking.service'
 import { TabRecoveryService } from '../services/tabRecovery.service'
 import { ThemesService } from '../services/themes.service'
+import { UpdaterService, Update } from '../services/updater.service'
 
 import { SafeModeModalComponent } from './safeModeModal.component'
 import { AppService, IToolbarButton, ToolbarButtonProvider } from '../api'
@@ -53,12 +54,14 @@ export class AppRootComponent {
     @Input() leftToolbarButtons: IToolbarButton[]
     @Input() rightToolbarButtons: IToolbarButton[]
     private logger: Logger
+    private appUpdate: Update
 
     constructor (
         private docking: DockingService,
         private electron: ElectronService,
         private tabRecovery: TabRecoveryService,
         private hotkeys: HotkeysService,
+        private updater: UpdaterService,
         public hostApp: HostAppService,
         public config: ConfigService,
         public app: AppService,
@@ -111,6 +114,10 @@ export class AppRootComponent {
         if (window['safeModeReason']) {
             ngbModal.open(SafeModeModalComponent)
         }
+
+        this.updater.check().then(update => {
+            this.appUpdate = update
+        })
     }
 
     onGlobalHotkey () {
@@ -155,6 +162,10 @@ export class AppRootComponent {
         return false
     }
 
+    updateApp () {
+        this.electron.shell.openExternal(this.appUpdate.url)
+    }
+
     private getToolbarButtons (aboveZero: boolean): IToolbarButton[] {
         let buttons: IToolbarButton[] = []
         this.toolbarButtonProviders.forEach((provider) => {