Keymaps as a clean architecture [WIP]

src/content/usecases/FocusUseCase.ts

@@ -0,0 +1,15 @@
+import FocusPresenter, { FocusPresenterImpl }
+  from '../presenters/FocusPresenter';
+export default class FocusUseCases {
+  private presenter: FocusPresenter;
+
+  constructor({
+    presenter = new FocusPresenterImpl(),
+  } = {}) {
+    this.presenter = presenter;
+  }
+
+  focusFirstInput() {
+    this.presenter.focusFirstElement();
+  }
+}