import * as types from '../actions/actionsTypes'; const initialState = { usersTyping: [] }; export default function room(state = initialState, action) { switch (action.type) { case types.ROOM.OPEN: return { ...initialState, ...action.room }; case types.ROOM.ADD_USER_TYPING: return { ...state, usersTyping: [...state.usersTyping.filter(user => user !== action.username), action.username] }; case types.ROOM.REMOVE_USER_TYPING: return { ...state, usersTyping: [...state.usersTyping.filter(user => user !== action.username)] }; default: return state; } }