import Immutable from 'immutable'; import { DROPDOWN_MENU_OPEN, DROPDOWN_MENU_CLOSE, } from '../actions/dropdown_menu'; const initialState = Immutable.Map({ openId: null, placement: null }); export default function dropdownMenu(state = initialState, action) { switch (action.type) { case DROPDOWN_MENU_OPEN: return state.merge({ openId: action.id, placement: action.placement }); case DROPDOWN_MENU_CLOSE: return state.get('openId') === action.id ? state.set('openId', null) : state; default: return state; } }