ApplicationManager and better memory management

app/assets/javascripts/controllers/lockScreen.depr.js

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+import template from '%/lock-screen.pug';
+import { AppStateEvents } from '@/services/state';
+import { PureCtrl } from './abstract/pure_ctrl';
+
+const ELEMENT_ID_PASSCODE_INPUT = 'passcode-input';
+
+class LockScreenCtrl extends PureCtrl {
+  /* @ngInject */
+  constructor(
+    $timeout,
+  ) {
+    super($timeout);
+    this.formData = {};
+  }
+
+  $onInit() {
+    super.$onInit();
+    this.puppet.focusInput = () => {
+      this.passcodeInput.focus();
+    };
+  }
+
+  get passcodeInput() {
+    return document.getElementById(
+      ELEMENT_ID_PASSCODE_INPUT
+    );
+  }
+
+  /** @override */
+  async onAppStateEvent(eventName, data) {
+    if (eventName === AppStateEvents.WindowDidFocus) {
+      const input = this.passcodeInput;
+      if (input) {
+        input.focus();
+      }
+    }
+  }
+
+  async submitPasscodeForm() {
+    if (
+      !this.formData.passcode ||
+      this.formData.passcode.length === 0
+    ) {
+      return;
+    }
+    this.passcodeInput.blur();
+    this.onValue()(this.formData.passcode);
+  }
+
+  forgotPasscode() {
+    this.formData.showRecovery = true;
+  }
+
+  beginDeleteData() {
+    this.application.alertService.confirm({
+      text: "Are you sure you want to clear all local data?",
+      destructive: true,
+      onConfirm: async () => {
+        await this.application.signOut();
+        await this.application.restart();
+      }
+    });
+  }
+}
+
+export class LockScreen {
+  constructor() {
+    this.restrict = 'E';
+    this.template = template;
+    this.controller = LockScreenCtrl;
+    this.controllerAs = 'ctrl';
+    this.bindToController = true;
+    this.scope = {
+      onValue: '&',
+      puppet: '='
+    };
+  }
+}