Refactor settings to use stack to allow dark theme. Move theme to app reducer to allow persistence.

redux/app/app.actions.js

@@ -27,3 +27,8 @@ export const documentUploadFailure = (error) => ({
 export const toggleDeleteAfterUpload = () => ({
   type: AppActionTypes.TOGGLE_DLETE_AFTER_UPLOAD,
 });
+
+export const setTheme = (theme) => ({
+  type: AppActionTypes.SET_THEME,
+  payload: theme,
+});

redux/app/app.reducer.js

@@ -6,6 +6,7 @@ const INITIAL_STATE = {
   documentUploadInProgress: null,
   documentUploadError: null,
   deleteAfterUpload: false,
+  theme: "system",
 };
 
 const appReducer = (state = INITIAL_STATE, action) => {
@@ -43,6 +44,8 @@ const appReducer = (state = INITIAL_STATE, action) => {
         ...state,
         deleteAfterUpload: !state.deleteAfterUpload,
       };
+    case AppActionTypes.SET_THEME:
+      return { ...state, theme: action.payload };
     default:
       return state;
   }

redux/app/app.selectors.js

@@ -26,3 +26,8 @@ export const selectDeleteAfterUpload = createSelector(
   [selectApp],
   (app) => app.deleteAfterUpload
 );
+
+export const selectTheme = createSelector(
+  [selectApp],
+  (app) => app.theme
+);

redux/app/app.types.js

@@ -5,5 +5,6 @@ const AppActionTypes = {
   DOCUMENT_UPLOAD_SUCCESS: "DOCUMENT_UPLOAD_SUCCESS",
   DOCUMENT_UPLOAD_FAILURE: "DOCUMENT_UPLOAD_FAILURE",
   TOGGLE_DLETE_AFTER_UPLOAD: "TOGGLE_DLETE_AFTER_UPLOAD",
+  SET_THEME: "SET_THEME",
 };
 export default AppActionTypes;