handle-api-call-state-nicely

reducer.ts

export function newsReducer(state: News = createDefaultNews(), action: NewsActions): News {
  switch (action.type) {
    case NewsActionsTypes.Load:
      return onLoadableLoad(state);
    case NewsActionsTypes.LoadSuccess:
      return {
        ...onLoadableSuccess(state),
        entities: action.payload.entities
      };
    case NewsActionsTypes.LoadError:
      return onLoadableError(state, action.error);
    default:
      return state;
  }
}