refactor: rename states to view controllers (#1060)

app/assets/javascripts/Controllers/NoAccountWarningController.ts

@@ -0,0 +1,44 @@
+import { storage, StorageKey } from '@/Services/LocalStorage'
+import { ApplicationEvent } from '@standardnotes/snjs'
+import { runInAction, makeObservable, observable, action } from 'mobx'
+import { WebApplication } from '../Application/Application'
+import { AbstractViewController } from './Abstract/AbstractViewController'
+
+export class NoAccountWarningController extends AbstractViewController {
+  show: boolean
+
+  constructor(application: WebApplication, appObservers: (() => void)[]) {
+    super(application)
+
+    this.show = application.hasAccount() ? false : storage.get(StorageKey.ShowNoAccountWarning) ?? true
+
+    appObservers.push(
+      application.addEventObserver(async () => {
+        runInAction(() => {
+          this.show = false
+        })
+      }, ApplicationEvent.SignedIn),
+      application.addEventObserver(async () => {
+        if (application.hasAccount()) {
+          runInAction(() => {
+            this.show = false
+          })
+        }
+      }, ApplicationEvent.Started),
+    )
+
+    makeObservable(this, {
+      show: observable,
+      hide: action,
+    })
+  }
+
+  hide = (): void => {
+    this.show = false
+    storage.set(StorageKey.ShowNoAccountWarning, false)
+  }
+
+  reset = (): void => {
+    storage.remove(StorageKey.ShowNoAccountWarning)
+  }
+}