@dnb/eufemia/components/date-picker/DatePickerCalc.js

DNB Eufemia Design System UI Library

import { subMonths, addMonths, isWithinInterval, isValid, isAfter, isBefore, isSameDay, isToday, isSameMonth, addDays, startOfWeek, getDay, startOfMonth, getDaysInMonth, toDate, parseISO, parse, startOfDay } from 'date-fns';
import { warn } from "../../shared/component-helper.js";
const calendarCache = {};
export function makeDayObject(date, {
  startDate,
  endDate,
  hoverDate,
  minDate,
  maxDate,
  month
}) {
  const range = getRange(startDate, endDate, hoverDate);
  const isLastMonth = isSameMonth(subMonths(date, 1), month);
  const isNextMonth = isSameMonth(addMonths(date, 1), month);
  const isStartDate = isStartDateCalc(date, range);
  const isEndDate = isEndDateCalc(date, range);
  const isWithinSelection = isWithinSelectionCalc(date, startDate, endDate);
  const isPreview = isPreviewCalc(date, startDate, endDate, hoverDate);
  const isDisabled = isDisabledCalc(date, minDate, maxDate);
  return {
    date,
    isToday: isToday(date),
    isLastMonth,
    isNextMonth,
    isStartDate,
    isEndDate,
    isWithinSelection,
    isPreview,
    isDisabled,
    isSelectable: !isLastMonth && !isNextMonth && !isDisabled,
    isInactive: isLastMonth || isNextMonth || isDisabled
  };
}
export function getCalendar(month, weekStartsOn = 0, {
  onlyMonth = false,
  hideNextMonthWeek = false
} = {}) {
  const cacheKey = month.toISOString();
  const thisMonth = getMonth(month);
  if (onlyMonth) {
    return calendarCache[cacheKey] = [...thisMonth];
  }
  if (calendarCache[cacheKey]) {
    return calendarCache[cacheKey];
  }
  const firstDay = (7 + getDay(startOfMonth(month)) - weekStartsOn) % 7;
  const lastMonth = getMonth(subMonths(month, 1), getDaysInMonth(subMonths(month, 1)) - firstDay);
  let fillCount = -1;
  if (hideNextMonthWeek) {
    fillCount = 35 - (thisMonth.length + firstDay);
  }
  if (fillCount < 0) {
    fillCount = 42 - (thisMonth.length + firstDay);
  }
  const nextMonth = getMonth(addMonths(month, 1), 0, fillCount > -1 ? fillCount : 0);
  return calendarCache[cacheKey] = [...lastMonth, ...thisMonth, ...nextMonth];
}
export function dayOffset(dayName) {
  const week = ['sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday'];
  return dayName ? week.indexOf(dayName.toLowerCase()) : 0;
}
export function toRange(startDate, endDate) {
  if (isBefore(endDate, startDate)) {
    const _startDate = startDate;
    startDate = endDate;
    endDate = _startDate;
  }
  return {
    startDate,
    endDate
  };
}
function getRange(startDate, endDate, hoverDate) {
  if (startDate && endDate) {
    return toRange(startDate, endDate);
  } else if (startDate && hoverDate) {
    return toRange(startDate, hoverDate);
  } else {
    return toRange(startDate, startDate);
  }
}
export function getWeek(weekStartsOn) {
  const startDay = startOfWeek(new Date(), {
    weekStartsOn
  });
  return Array(7).fill(1).map((value, i) => addDays(startDay, i));
}
export function getMonth(month, skip = 0, limit) {
  const startDay = startOfMonth(month);
  let size = getDaysInMonth(month) - skip;
  size = Math.min(Math.max(size, 0), limit > -1 ? limit : size);
  size = size < 0 ? 0 : size;
  return Array(size).fill(1).map((value, i) => addDays(startDay, i + skip));
}
function isWithinSelectionCalc(date, startDate, endDate) {
  const {
    startDate: start,
    endDate: end
  } = toRange(startDate, endDate);
  return startDate && endDate ? isValid(start) && isValid(end) && isWithinInterval(date, {
    start,
    end
  }) : false;
}
function isDisabledCalc(date, minDate, maxDate) {
  return minDate && isBefore(startOfDay(date), startOfDay(minDate)) || maxDate && isAfter(startOfDay(date), startOfDay(maxDate));
}
export { isDisabledCalc as isDisabled };
function isStartDateCalc(date, range) {
  return range.startDate && isSameDay(date, range.startDate);
}
function isEndDateCalc(date, range) {
  return range.endDate && isSameDay(date, range.endDate);
}
function isPreviewCalc(date, startDate, endDate, hoverDate) {
  const {
    startDate: start,
    endDate: end
  } = toRange(startDate, hoverDate);
  return startDate && !endDate && isValid(start) && isValid(end) && isWithinInterval(date, {
    start,
    end
  });
}
export function correctV1Format(date) {
  if (/YYYY/.test(date) && /DD/.test(date)) {
    warn('You are using "YYYY-MM-DD" as the dateFormat or returnFormat? Please use "yyyy-MM-dd" instead!');
    date = date.replace(/DD/, 'dd').replace(/YYYY/, 'yyyy');
  }
  return date;
}
function parseHumanDate(input, humanDateFormats = ['dd.MM.yyyy', 'dd/MM/yyyy', 'yyyy-MM-dd']) {
  for (const format of humanDateFormats) {
    const parsed = parse(input, format, new Date());
    if (isValid(parsed)) {
      return parsed;
    }
  }
  return null;
}
export function convertStringToDate(date, {
  dateFormat = null
} = {}) {
  if (!date) {
    return null;
  }
  let dateObject;
  if (typeof date === 'string') {
    dateObject = parseISO(date);
    if (!isValid(dateObject)) {
      dateObject = parseHumanDate(date);
    }
    if (dateFormat && !isValid(dateObject)) {
      dateObject = parseHumanDate(date, [correctV1Format(dateFormat)]);
    }
  } else {
    dateObject = toDate(date);
  }
  if (!isValid(dateObject)) {
    warn('convertStringToDate got invalid date:', date);
    return null;
  }
  return dateObject;
}
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