export const expenseFormPlugin = (state, action) => {
  if (action.type === '@@redux-form/CHANGE' && action.meta && action.meta.form === 'expenseForm' && action.meta.field) {
    if (action.meta.field === 'time' || action.meta.field === 'rate') {
      const time = state.values.time? parseInt(state.values.time, 10) : 0
      const rate = state.values.rate ? parseInt(state.values.rate, 10): 0
      const total = time * rate
      return {
        ...state,
        values: {
          ...state.values,
          total: total
        }
      }
    }
  }
  return state
}