Capitalize background scripts

src/background/usecases/SettingUseCase.js

@@ -0,0 +1,32 @@
+import Setting from '../domains/Setting';
+// eslint-disable-next-line max-len
+import PersistentSettingRepository from '../repositories/PersistentSettingRepository';
+import SettingRepository from '../repositories/SettingRepository';
+
+export default class SettingUseCase {
+  constructor() {
+    this.persistentSettingRepository = new PersistentSettingRepository();
+    this.settingRepository = new SettingRepository();
+  }
+
+  save(settings) {
+    this.persistentSettingRepository.save(settings);
+  }
+
+  get() {
+    return this.settingRepository.get();
+  }
+
+  async reload() {
+    let settings = await this.persistentSettingRepository.load();
+    if (!settings) {
+      settings = Setting.defaultSettings();
+    }
+
+    let value = settings.value();
+
+    this.settingRepository.update(value);
+
+    return value;
+  }
+}