Use onInstalled event

src/background/controllers/VersionController.js

@@ -5,7 +5,7 @@ export default class VersionController {
     this.versionUseCase = new VersionUseCase();
   }
 
-  notifyIfUpdated() {
-    this.versionUseCase.notifyIfUpdated();
+  notify() {
+    this.versionUseCase.notify();
   }
 }

src/background/controllers/version.js

@@ -0,0 +1,13 @@
+import VersionInteractor from '../usecases/version';
+
+export default class VersionController {
+  constructor() {
+    this.versionInteractor = new VersionInteractor();
+  }
+
+  notifyIfUpdated() {
+    browser.runtime.onInstalled.addListener(() => {
+      return this.versionInteractor.notify();
+    });
+  }
+}

src/background/index.js

@@ -3,6 +3,9 @@ import SettingController from './controllers/SettingController';
 import VersionController from './controllers/VersionController';
 
 new SettingController().reload();
-new VersionController().notifyIfUpdated();
+
+browser.runtime.onInstalled.addListener(() => {
+  new VersionController().notify();
+});
 
 new ContentMessageListener().run();

src/background/presenters/NotifyPresenter.js

@@ -1,6 +1,6 @@
 const NOTIFICATION_ID = 'vimvixen-update';
 
-export default class Notifier {
+export default class NotifyPresenter {
   notify(title, message, onclick) {
     const listener = (id) => {
       if (id !== NOTIFICATION_ID) {

src/background/usecases/VersionUseCase.js

@@ -1,40 +1,25 @@
 import manifest from '../../../manifest.json';
-import VersionRepository from '../repositories/VersionRepository';
 import TabPresenter from '../presenters/TabPresenter';
-import Notifier from '../infrastructures/Notifier';
+import NotifyPresenter from '../presenters/NotifyPresenter';
 
 export default class VersionUseCase {
   constructor() {
-    this.versionRepository = new VersionRepository();
     this.tabPresenter = new TabPresenter();
-    this.notifier = new Notifier();
+    this.notifyPresenter = new NotifyPresenter();
   }
 
-  async notifyIfUpdated() {
-    if (!await this.checkUpdated()) {
-      return;
-    }
-
-    let title = 'Vim Vixen ' + manifest.version + ' has been installed';
+  notify() {
+    let title = `Vim Vixen ${manifest.version} has been installed`;
     let message = 'Click here to see release notes';
-    this.notifier.notify(title, message, () => {
-      let url = this.releaseNoteUrl(manifest.version);
+    let url = this.releaseNoteUrl(manifest.version);
+    this.notifyPresenter.notify(title, message, () => {
       this.tabPresenter.create(url);
     });
-    this.versionRepository.update(manifest.version);
-  }
-
-  async checkUpdated() {
-    let prev = await this.versionRepository.get();
-    if (!prev) {
-      return true;
-    }
-    return manifest.version !== prev;
   }
 
   releaseNoteUrl(version) {
     if (version) {
-      return 'https://github.com/ueokande/vim-vixen/releases/tag/' + version;
+      return `https://github.com/ueokande/vim-vixen/releases/tag/${version}`;
     }
     return 'https://github.com/ueokande/vim-vixen/releases/';
   }