@dnb/eufemia/components/date-picker/hooks/useInputDates.js

DNB Eufemia Design System UI Library

"use client";

import { format, isValid } from 'date-fns';
import { useCallback, useState } from 'react';
export default function useInputDates({
  startDate,
  endDate
}) {
  const [previousDates, setPreviousDates] = useState({
    startDate,
    endDate
  });
  const [inputDates, setInputDates] = useState({
    startDay: formatInputDate('day', startDate),
    startMonth: formatInputDate('month', startDate),
    startYear: formatInputDate('year', startDate),
    endDay: formatInputDate('day', endDate),
    endMonth: formatInputDate('month', endDate),
    endYear: formatInputDate('year', endDate)
  });
  const hasStartDateChange = startDate !== previousDates.startDate;
  const hasEndDateChange = endDate !== previousDates.endDate;
  if (hasStartDateChange || hasEndDateChange) {
    setInputDates(currentInputDates => ({
      ...currentInputDates,
      ...(hasStartDateChange && getInputDates('start', startDate)),
      ...(hasEndDateChange && getInputDates('end', endDate))
    }));
    setPreviousDates({
      startDate,
      endDate
    });
  }
  const updateInputDates = useCallback(dates => {
    setInputDates(current => ({
      ...current,
      ...dates
    }));
  }, []);
  return {
    inputDates,
    updateInputDates
  };
}
const inputDateFormatter = {
  day: date => pad(format(date, 'dd'), 2),
  month: date => pad(format(date, 'MM'), 2),
  year: date => format(date, 'yyyy')
};
function formatInputDate(type, date) {
  return isValid(date) ? inputDateFormatter[type](date) : null;
}
function getInputDates(type, date) {
  if (isValid(date)) {
    return {
      [`${type}Day`]: formatInputDate('day', date),
      [`${type}Month`]: formatInputDate('month', date),
      [`${type}Year`]: formatInputDate('year', date)
    };
  }
  if (date === undefined) {
    return {
      [`${type}Day`]: null,
      [`${type}Month`]: null,
      [`${type}Year`]: null
    };
  }
  return {};
}
export function pad(date, size) {
  const dateWithPadding = '000000000' + date;
  return dateWithPadding.substring(dateWithPadding.length - size);
}
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