text: import { ADD, TICK } from 'constants/actionTypes'
  
  export const initialState = {
    lastUpdate: 0,
    light: false,
    count: 0
  }
  
  export default (state = initialState, action) => {
    const { type, ts, light } = action
  
    switch (type) {
      case TICK: {
        return Object.assign({}, state, {
          lastUpdate: ts,
          light: !!light
        })
      }
  
      case ADD: {
        return Object.assign({}, state, {
          count: state.count + 1
        })
      }
  
      default: {
        return state
      }
    }
  }
  