separate setting actions and reducers

src/shared/settings/storage.js

@@ -0,0 +1,31 @@
+import DefaultSettings from './default';
+import * as settingsValues from './values';
+
+const loadRaw = () => {
+  return browser.storage.local.get('settings').then(({ settings }) => {
+    if (!settings) {
+      return DefaultSettings;
+    }
+    return Object.assign({}, DefaultSettings, settings);
+  });
+};
+
+const loadValue = () => {
+  return loadRaw().then((settings) => {
+    let value = JSON.parse(DefaultSettings.json);
+    if (settings.source === 'json') {
+      value = settingsValues.valueFromJson(settings.json);
+    } else if (settings.source === 'form') {
+      value = settingsValues.valueFromForm(settings.form);
+    }
+    return value;
+  });
+};
+
+const save = (settings) => {
+  return browser.storage.local.set({
+    settings,
+  });
+};
+
+export { loadRaw, loadValue, save };