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) => {

terminus-core/src/index.ts

@@ -14,6 +14,7 @@ import { HotkeysService, AppHotkeyProvider } from './services/hotkeys.service'
 import { DockingService } from './services/docking.service'
 import { TabRecoveryService } from './services/tabRecovery.service'
 import { ThemesService } from './services/themes.service'
+import { UpdaterService } from './services/updater.service'
 
 import { AppRootComponent } from './components/appRoot.component'
 import { TabBodyComponent } from './components/tabBody.component'
@@ -43,6 +44,7 @@ const PROVIDERS = [
     LogService,
     TabRecoveryService,
     ThemesService,
+    UpdaterService,
     { provide: HotkeyProvider, useClass: AppHotkeyProvider, multi: true },
     { provide: Theme, useClass: StandardTheme, multi: true },
     { provide: ConfigProvider, useClass: CoreConfigProvider, multi: true },

terminus-core/src/services/updater.service.ts

@@ -0,0 +1,36 @@
+import axios from 'axios'
+import { Injectable } from '@angular/core'
+import { Logger, LogService } from './log.service'
+import { ElectronService } from './electron.service'
+
+const UPDATES_URL = 'https://api.github.com/repos/eugeny/terminus/releases/latest'
+
+export interface Update {
+    version: string
+    url: string
+}
+
+@Injectable()
+export class UpdaterService {
+    private logger: Logger
+
+    constructor (
+        log: LogService,
+        private electron: ElectronService,
+    ) {
+        this.logger = log.create('updater')
+    }
+
+    async check (): Promise<Update> {
+        this.logger.debug('Checking for updates')
+        let response = await axios.get(UPDATES_URL)
+        let data = response.data
+        let version = data.tag_name.substring(1)
+        if (this.electron.app.getVersion() !== version) {
+            this.logger.info('Update available:', version)
+            return { version, url: data.html_url }
+        }
+        this.logger.info('No updates')
+        return null
+    }
+}