handle-api-call-state-nicely

base-reducer.ts

// базовый редуктор должен обновлять только не loadable состояния
function baseNewsReducer(state: News = createDefaultNews(), action: NewsActions): News {
  switch (action.type) {
    case NewsActionsTypes.LoadSuccess:
      return {
        ...state,
        entities: action.payload.entities
      };
    default:
      return state;
  }
}
 // withLoadable расширяет baseReducer для обновления состояния loadable
export function newsReducer(state: News, action: NewsActions): News {
  return withLoadable(baseNewsReducer, {
    loadingActionType: NewsActionsTypes.Load,
    successActionType: NewsActionsTypes.LoadSuccess,
    errorActionType: NewsActionsTypes.LoadError,
  })(state, action);
}