Keymaps as a clean architecture [WIP]

src/content/usecases/ScrollUseCase.ts

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+import ScrollPresenter, { ScrollPresenterImpl }
+  from '../presenters/ScrollPresenter';
+import SettingRepository, { SettingRepositoryImpl }
+  from '../repositories/SettingRepository';
+
+export default class ScrollUseCase {
+  private presenter: ScrollPresenter;
+
+  private settingRepository: SettingRepository;
+
+  constructor({
+    presenter = new ScrollPresenterImpl(),
+    settingRepository = new SettingRepositoryImpl(),
+  } = {}) {
+    this.presenter = presenter;
+    this.settingRepository = settingRepository;
+  }
+
+  scrollVertically(count: number): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollVertically(count, smooth);
+  }
+
+  scrollHorizonally(count: number): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollHorizonally(count, smooth);
+  }
+
+  scrollPages(count: number): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollPages(count, smooth);
+  }
+
+  scrollToTop(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToTop(smooth);
+  }
+
+  scrollToBottom(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToBottom(smooth);
+  }
+
+  scrollToHome(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToHome(smooth);
+  }
+
+  scrollToEnd(): void {
+    let smooth = this.getSmoothScroll();
+    this.presenter.scrollToEnd(smooth);
+  }
+
+  private getSmoothScroll(): boolean {
+    let settings = this.settingRepository.get();
+    return settings.properties.smoothscroll;
+  }
+}