Range and multi select for @dmtrKovalenko/material-ui-pickers

DateMultiPicker.jsx

import React, { useState, useContext, useRef } from 'react'
import { DatePicker } from 'material-ui-pickers'
import { MuiPickersContext } from 'material-ui-pickers'

export default function DateMultiPicker({
  value,
  onChange,
  labelFunc,
  format,
  emptyLabel,
  onClose,
  ...props
}) {
  const [dates, setDates] = useState(value)
  const utils = useContext(MuiPickersContext)

  function renderDay(day, selectedDate, dayInCurrentMonth, dayComponent) {
    return React.cloneElement(dayComponent, {
      onClick: e => {
        e.stopPropagation()
        const i = dates.findIndex(d => utils.isSameDay(d, day))
        if (i >= 0) {
          const nextDates = [...dates]
          nextDates.splice(i, 1)
          setDates(nextDates)
        } else {
          setDates([...dates, day])
        }
      },
      selected: !!dates.find(d => utils.isSameDay(d, day))
    })
  }

  const formatDate = date => utils.format(date, format || utils.dateFormat)

  return (
    <DatePicker
      {...props}
      value={dates[0]}
      renderDay={renderDay}
      onClose={() => {
        onChange(dates)
        if (onClose) onClose()
      }}
      onChange={() => {}}
      onClear={ () => {
        setDates([])
        onChange([])
      }}
      labelFunc={(date, invalid) =>
        labelFunc
          ? labelFunc(dates, invalid)
          : date && dates.length > 0
          ? dates.map(formatDate).join(', ')
          : emptyLabel || ''
      }
    />
  )
}

DateRangePicker.jsx

import React, { useState, useContext, useRef } from 'react'
import { DatePicker } from 'material-ui-pickers'
import { MuiPickersContext } from 'material-ui-pickers'
import withStyles from '@material-ui/core/styles/withStyles'
import { styles as dayStyles } from 'material-ui-pickers/DatePicker/components/Day'
import clsx from 'clsx'

function DateRangePicker({
  classes,
  value,
  onChange,
  labelFunc,
  format,
  emptyLabel,
  autoOk,
  onClose,
  ...props
}) {
  const [begin, setBegin] = useState(value[0])
  const [end, setEnd] = useState(value[1])
  const [hover, setHover] = useState(undefined)
  const picker = useRef()
  const utils = useContext(MuiPickersContext)

  const min = Math.min(begin, end || hover)
  const max = Math.max(begin, end || hover)

  function renderDay(day, selectedDate, dayInCurrentMonth, dayComponent) {
    return React.cloneElement(dayComponent, {
      onClick: e => {
        e.stopPropagation()
        if (!begin) setBegin(day)
        else if (!end) {
          setEnd(day)
          if (autoOk) {
            onChange([begin, day].sort())
            picker.current.close()
          }
        } else {
          setBegin(day)
          setEnd(undefined)
        }
      },
      onMouseEnter: e => setHover(day),
      className: clsx(classes.day, {
        [classes.hidden]: dayComponent.props.hidden,
        [classes.current]: dayComponent.props.current,
        [classes.isDisabled]: dayComponent.props.disabled,
        [classes.isSelected]: day >= min && day <= max,
        [classes.beginCap]: utils.isSameDay(day, min),
        [classes.endCap]: utils.isSameDay(day, max)
      })
    })
  }

  const formatDate = date => utils.format(date, format || utils.dateFormat)

  return (
    <DatePicker
      {...props}
      value={begin}
      renderDay={renderDay}
      onClose={() => {
        onChange([begin, end].sort())
        if (onClose) onClose()
      }}
      onChange={() => {}}
      onClear={() => {
        setBegin(undefined)
        setEnd(undefined)
        setHover(undefined)
        onChange([])
      }}
      ref={picker}
      labelFunc={(date, invalid) =>
        labelFunc
          ? labelFunc([begin, end].sort(), invalid)
          : date && begin && end
          ? `${formatDate(begin)} - ${formatDate(end)}`
          : emptyLabel || ''
      }
    />
  )
}

export const styles = theme => {
  const base = dayStyles(theme)
  return {
    ...base,
    day: {
      ...base.day,
      margin: 0,
      width: '40px',
      borderRadius: '0'
    },
    beginCap: {
      borderRadius: '50% 0 0 50%'
    },
    endCap: {
      borderRadius: '0 50% 50% 0'
    }
  }
}

export default withStyles(styles, { name: 'DateRangePicker' })(DateRangePicker)

how to use the labelFunc property? i'm trying to change the label in which if the start date and end date is the same, the label should only be date.