stupa-pdf-api/frontend/node_modules/@mui/x-date-pickers/internals/hooks/useField/useField.utils.js

719 lines
26 KiB
JavaScript

import _extends from "@babel/runtime/helpers/esm/extends";
import { getMonthsInYear } from '../../utils/date-utils';
export const getDateSectionConfigFromFormatToken = (utils, formatToken) => {
const config = utils.formatTokenMap[formatToken];
if (config == null) {
throw new Error([`MUI: The token "${formatToken}" is not supported by the Date and Time Pickers.`, 'Please try using another token or open an issue on https://github.com/mui/mui-x/issues/new/choose if you think it should be supported.'].join('\n'));
}
if (typeof config === 'string') {
return {
type: config,
contentType: config === 'meridiem' ? 'letter' : 'digit',
maxLength: undefined
};
}
return {
type: config.sectionType,
contentType: config.contentType,
maxLength: config.maxLength
};
};
const getDeltaFromKeyCode = keyCode => {
switch (keyCode) {
case 'ArrowUp':
return 1;
case 'ArrowDown':
return -1;
case 'PageUp':
return 5;
case 'PageDown':
return -5;
default:
return 0;
}
};
export const getDaysInWeekStr = (utils, timezone, format) => {
const elements = [];
const now = utils.dateWithTimezone(undefined, timezone);
const startDate = utils.startOfWeek(now);
const endDate = utils.endOfWeek(now);
let current = startDate;
while (utils.isBefore(current, endDate)) {
elements.push(current);
current = utils.addDays(current, 1);
}
return elements.map(weekDay => utils.formatByString(weekDay, format));
};
export const getLetterEditingOptions = (utils, timezone, sectionType, format) => {
switch (sectionType) {
case 'month':
{
return getMonthsInYear(utils, utils.dateWithTimezone(undefined, timezone)).map(month => utils.formatByString(month, format));
}
case 'weekDay':
{
return getDaysInWeekStr(utils, timezone, format);
}
case 'meridiem':
{
const now = utils.dateWithTimezone(undefined, timezone);
return [utils.startOfDay(now), utils.endOfDay(now)].map(date => utils.formatByString(date, format));
}
default:
{
return [];
}
}
};
export const cleanLeadingZeros = (utils, valueStr, size) => {
let cleanValueStr = valueStr;
// Remove the leading zeros
cleanValueStr = Number(cleanValueStr).toString();
// Add enough leading zeros to fill the section
while (cleanValueStr.length < size) {
cleanValueStr = `0${cleanValueStr}`;
}
return cleanValueStr;
};
export const cleanDigitSectionValue = (utils, timezone, value, sectionBoundaries, section) => {
if (process.env.NODE_ENV !== 'production') {
if (section.type !== 'day' && section.contentType === 'digit-with-letter') {
throw new Error([`MUI: The token "${section.format}" is a digit format with letter in it.'
This type of format is only supported for 'day' sections`].join('\n'));
}
}
if (section.type === 'day' && section.contentType === 'digit-with-letter') {
const date = utils.setDate(sectionBoundaries.longestMonth, value);
return utils.formatByString(date, section.format);
}
// queryValue without leading `0` (`01` => `1`)
const valueStr = value.toString();
if (section.hasLeadingZerosInInput) {
return cleanLeadingZeros(utils, valueStr, section.maxLength);
}
return valueStr;
};
export const adjustSectionValue = (utils, timezone, section, keyCode, sectionsValueBoundaries, activeDate, stepsAttributes) => {
const delta = getDeltaFromKeyCode(keyCode);
const isStart = keyCode === 'Home';
const isEnd = keyCode === 'End';
const shouldSetAbsolute = section.value === '' || isStart || isEnd;
const adjustDigitSection = () => {
const sectionBoundaries = sectionsValueBoundaries[section.type]({
currentDate: activeDate,
format: section.format,
contentType: section.contentType
});
const getCleanValue = value => cleanDigitSectionValue(utils, timezone, value, sectionBoundaries, section);
const step = section.type === 'minutes' && stepsAttributes != null && stepsAttributes.minutesStep ? stepsAttributes.minutesStep : 1;
const currentSectionValue = parseInt(section.value, 10);
let newSectionValueNumber = currentSectionValue + delta * step;
if (shouldSetAbsolute) {
if (section.type === 'year' && !isEnd && !isStart) {
return utils.formatByString(utils.dateWithTimezone(undefined, timezone), section.format);
}
if (delta > 0 || isStart) {
newSectionValueNumber = sectionBoundaries.minimum;
} else {
newSectionValueNumber = sectionBoundaries.maximum;
}
}
if (newSectionValueNumber % step !== 0) {
if (delta < 0 || isStart) {
newSectionValueNumber += step - (step + newSectionValueNumber) % step; // for JS -3 % 5 = -3 (should be 2)
}
if (delta > 0 || isEnd) {
newSectionValueNumber -= newSectionValueNumber % step;
}
}
if (newSectionValueNumber > sectionBoundaries.maximum) {
return getCleanValue(sectionBoundaries.minimum + (newSectionValueNumber - sectionBoundaries.maximum - 1) % (sectionBoundaries.maximum - sectionBoundaries.minimum + 1));
}
if (newSectionValueNumber < sectionBoundaries.minimum) {
return getCleanValue(sectionBoundaries.maximum - (sectionBoundaries.minimum - newSectionValueNumber - 1) % (sectionBoundaries.maximum - sectionBoundaries.minimum + 1));
}
return getCleanValue(newSectionValueNumber);
};
const adjustLetterSection = () => {
const options = getLetterEditingOptions(utils, timezone, section.type, section.format);
if (options.length === 0) {
return section.value;
}
if (shouldSetAbsolute) {
if (delta > 0 || isStart) {
return options[0];
}
return options[options.length - 1];
}
const currentOptionIndex = options.indexOf(section.value);
const newOptionIndex = (currentOptionIndex + options.length + delta) % options.length;
return options[newOptionIndex];
};
if (section.contentType === 'digit' || section.contentType === 'digit-with-letter') {
return adjustDigitSection();
}
return adjustLetterSection();
};
export const getSectionVisibleValue = (section, target) => {
let value = section.value || section.placeholder;
const hasLeadingZeros = target === 'non-input' ? section.hasLeadingZerosInFormat : section.hasLeadingZerosInInput;
if (target === 'non-input' && section.hasLeadingZerosInInput && !section.hasLeadingZerosInFormat) {
value = Number(value).toString();
}
// In the input, we add an empty character at the end of each section without leading zeros.
// This makes sure that `onChange` will always be fired.
// Otherwise, when your input value equals `1/dd/yyyy` (format `M/DD/YYYY` on DayJs),
// If you press `1`, on the first section, the new value is also `1/dd/yyyy`,
// So the browser will not fire the input `onChange`.
const shouldAddInvisibleSpace = ['input-rtl', 'input-ltr'].includes(target) && section.contentType === 'digit' && !hasLeadingZeros && value.length === 1;
if (shouldAddInvisibleSpace) {
value = `${value}\u200e`;
}
if (target === 'input-rtl') {
value = `\u2068${value}\u2069`;
}
return value;
};
export const cleanString = dirtyString => dirtyString.replace(/[\u2066\u2067\u2068\u2069]/g, '');
export const addPositionPropertiesToSections = (sections, isRTL) => {
let position = 0;
let positionInInput = isRTL ? 1 : 0;
const newSections = [];
for (let i = 0; i < sections.length; i += 1) {
const section = sections[i];
const renderedValue = getSectionVisibleValue(section, isRTL ? 'input-rtl' : 'input-ltr');
const sectionStr = `${section.startSeparator}${renderedValue}${section.endSeparator}`;
const sectionLength = cleanString(sectionStr).length;
const sectionLengthInInput = sectionStr.length;
// The ...InInput values consider the unicode characters but do include them in their indexes
const cleanedValue = cleanString(renderedValue);
const startInInput = positionInInput + renderedValue.indexOf(cleanedValue[0]) + section.startSeparator.length;
const endInInput = startInInput + cleanedValue.length;
newSections.push(_extends({}, section, {
start: position,
end: position + sectionLength,
startInInput,
endInInput
}));
position += sectionLength;
// Move position to the end of string associated to the current section
positionInInput += sectionLengthInInput;
}
return newSections;
};
const getSectionPlaceholder = (utils, timezone, localeText, sectionConfig, sectionFormat) => {
switch (sectionConfig.type) {
case 'year':
{
return localeText.fieldYearPlaceholder({
digitAmount: utils.formatByString(utils.dateWithTimezone(undefined, timezone), sectionFormat).length,
format: sectionFormat
});
}
case 'month':
{
return localeText.fieldMonthPlaceholder({
contentType: sectionConfig.contentType,
format: sectionFormat
});
}
case 'day':
{
return localeText.fieldDayPlaceholder({
format: sectionFormat
});
}
case 'weekDay':
{
return localeText.fieldWeekDayPlaceholder({
contentType: sectionConfig.contentType,
format: sectionFormat
});
}
case 'hours':
{
return localeText.fieldHoursPlaceholder({
format: sectionFormat
});
}
case 'minutes':
{
return localeText.fieldMinutesPlaceholder({
format: sectionFormat
});
}
case 'seconds':
{
return localeText.fieldSecondsPlaceholder({
format: sectionFormat
});
}
case 'meridiem':
{
return localeText.fieldMeridiemPlaceholder({
format: sectionFormat
});
}
default:
{
return sectionFormat;
}
}
};
export const changeSectionValueFormat = (utils, valueStr, currentFormat, newFormat) => {
if (process.env.NODE_ENV !== 'production') {
if (getDateSectionConfigFromFormatToken(utils, currentFormat).type === 'weekDay') {
throw new Error("changeSectionValueFormat doesn't support week day formats");
}
}
return utils.formatByString(utils.parse(valueStr, currentFormat), newFormat);
};
const isFourDigitYearFormat = (utils, timezone, format) => utils.formatByString(utils.dateWithTimezone(undefined, timezone), format).length === 4;
export const doesSectionFormatHaveLeadingZeros = (utils, timezone, contentType, sectionType, format) => {
if (contentType !== 'digit') {
return false;
}
const now = utils.dateWithTimezone(undefined, timezone);
switch (sectionType) {
// We can't use `changeSectionValueFormat`, because `utils.parse('1', 'YYYY')` returns `1971` instead of `1`.
case 'year':
{
if (isFourDigitYearFormat(utils, timezone, format)) {
const formatted0001 = utils.formatByString(utils.setYear(now, 1), format);
return formatted0001 === '0001';
}
const formatted2001 = utils.formatByString(utils.setYear(now, 2001), format);
return formatted2001 === '01';
}
case 'month':
{
return utils.formatByString(utils.startOfYear(now), format).length > 1;
}
case 'day':
{
return utils.formatByString(utils.startOfMonth(now), format).length > 1;
}
case 'weekDay':
{
return utils.formatByString(utils.startOfWeek(now), format).length > 1;
}
case 'hours':
{
return utils.formatByString(utils.setHours(now, 1), format).length > 1;
}
case 'minutes':
{
return utils.formatByString(utils.setMinutes(now, 1), format).length > 1;
}
case 'seconds':
{
return utils.formatByString(utils.setSeconds(now, 1), format).length > 1;
}
default:
{
throw new Error('Invalid section type');
}
}
};
const getEscapedPartsFromFormat = (utils, format) => {
const escapedParts = [];
const {
start: startChar,
end: endChar
} = utils.escapedCharacters;
const regExp = new RegExp(`(\\${startChar}[^\\${endChar}]*\\${endChar})+`, 'g');
let match = null;
// eslint-disable-next-line no-cond-assign
while (match = regExp.exec(format)) {
escapedParts.push({
start: match.index,
end: regExp.lastIndex - 1
});
}
return escapedParts;
};
export const splitFormatIntoSections = (utils, timezone, localeText, format, date, formatDensity, shouldRespectLeadingZeros, isRTL) => {
let startSeparator = '';
const sections = [];
const now = utils.date();
const commitToken = token => {
if (token === '') {
return null;
}
const sectionConfig = getDateSectionConfigFromFormatToken(utils, token);
const hasLeadingZerosInFormat = doesSectionFormatHaveLeadingZeros(utils, timezone, sectionConfig.contentType, sectionConfig.type, token);
const hasLeadingZerosInInput = shouldRespectLeadingZeros ? hasLeadingZerosInFormat : sectionConfig.contentType === 'digit';
const isValidDate = date != null && utils.isValid(date);
let sectionValue = isValidDate ? utils.formatByString(date, token) : '';
let maxLength = null;
if (hasLeadingZerosInInput) {
if (hasLeadingZerosInFormat) {
maxLength = sectionValue === '' ? utils.formatByString(now, token).length : sectionValue.length;
} else {
if (sectionConfig.maxLength == null) {
throw new Error(`MUI: The token ${token} should have a 'maxDigitNumber' property on it's adapter`);
}
maxLength = sectionConfig.maxLength;
if (isValidDate) {
sectionValue = cleanLeadingZeros(utils, sectionValue, maxLength);
}
}
}
sections.push(_extends({}, sectionConfig, {
format: token,
maxLength,
value: sectionValue,
placeholder: getSectionPlaceholder(utils, timezone, localeText, sectionConfig, token),
hasLeadingZeros: hasLeadingZerosInFormat,
hasLeadingZerosInFormat,
hasLeadingZerosInInput,
startSeparator: sections.length === 0 ? startSeparator : '',
endSeparator: '',
modified: false
}));
return null;
};
// Expand the provided format
let formatExpansionOverflow = 10;
let prevFormat = format;
let nextFormat = utils.expandFormat(format);
while (nextFormat !== prevFormat) {
prevFormat = nextFormat;
nextFormat = utils.expandFormat(prevFormat);
formatExpansionOverflow -= 1;
if (formatExpansionOverflow < 0) {
throw new Error('MUI: The format expansion seems to be enter in an infinite loop. Please open an issue with the format passed to the picker component');
}
}
const expandedFormat = nextFormat;
// Get start/end indexes of escaped sections
const escapedParts = getEscapedPartsFromFormat(utils, expandedFormat);
// This RegExp test if the beginning of a string correspond to a supported token
const isTokenStartRegExp = new RegExp(`^(${Object.keys(utils.formatTokenMap).sort((a, b) => b.length - a.length) // Sort to put longest word first
.join('|')})`, 'g') // used to get access to lastIndex state
;
let currentTokenValue = '';
for (let i = 0; i < expandedFormat.length; i += 1) {
const escapedPartOfCurrentChar = escapedParts.find(escapeIndex => escapeIndex.start <= i && escapeIndex.end >= i);
const char = expandedFormat[i];
const isEscapedChar = escapedPartOfCurrentChar != null;
const potentialToken = `${currentTokenValue}${expandedFormat.slice(i)}`;
const regExpMatch = isTokenStartRegExp.test(potentialToken);
if (!isEscapedChar && char.match(/([A-Za-z]+)/) && regExpMatch) {
currentTokenValue = potentialToken.slice(0, isTokenStartRegExp.lastIndex);
i += isTokenStartRegExp.lastIndex - 1;
} else {
// If we are on the opening or closing character of an escaped part of the format,
// Then we ignore this character.
const isEscapeBoundary = isEscapedChar && (escapedPartOfCurrentChar == null ? void 0 : escapedPartOfCurrentChar.start) === i || (escapedPartOfCurrentChar == null ? void 0 : escapedPartOfCurrentChar.end) === i;
if (!isEscapeBoundary) {
commitToken(currentTokenValue);
currentTokenValue = '';
if (sections.length === 0) {
startSeparator += char;
} else {
sections[sections.length - 1].endSeparator += char;
}
}
}
}
commitToken(currentTokenValue);
return sections.map(section => {
const cleanSeparator = separator => {
let cleanedSeparator = separator;
if (isRTL && cleanedSeparator !== null && cleanedSeparator.includes(' ')) {
cleanedSeparator = `\u2069${cleanedSeparator}\u2066`;
}
if (formatDensity === 'spacious' && ['/', '.', '-'].includes(cleanedSeparator)) {
cleanedSeparator = ` ${cleanedSeparator} `;
}
return cleanedSeparator;
};
section.startSeparator = cleanSeparator(section.startSeparator);
section.endSeparator = cleanSeparator(section.endSeparator);
return section;
});
};
/**
* Some date libraries like `dayjs` don't support parsing from date with escaped characters.
* To make sure that the parsing works, we are building a format and a date without any separator.
*/
export const getDateFromDateSections = (utils, sections) => {
// If we have both a day and a weekDay section,
// Then we skip the weekDay in the parsing because libraries like dayjs can't parse complicated formats containing a weekDay.
// dayjs(dayjs().format('dddd MMMM D YYYY'), 'dddd MMMM D YYYY')) // returns `Invalid Date` even if the format is valid.
const shouldSkipWeekDays = sections.some(section => section.type === 'day');
const sectionFormats = [];
const sectionValues = [];
for (let i = 0; i < sections.length; i += 1) {
const section = sections[i];
const shouldSkip = shouldSkipWeekDays && section.type === 'weekDay';
if (!shouldSkip) {
sectionFormats.push(section.format);
sectionValues.push(getSectionVisibleValue(section, 'non-input'));
}
}
const formatWithoutSeparator = sectionFormats.join(' ');
const dateWithoutSeparatorStr = sectionValues.join(' ');
return utils.parse(dateWithoutSeparatorStr, formatWithoutSeparator);
};
export const createDateStrForInputFromSections = (sections, isRTL) => {
const formattedSections = sections.map(section => {
const dateValue = getSectionVisibleValue(section, isRTL ? 'input-rtl' : 'input-ltr');
return `${section.startSeparator}${dateValue}${section.endSeparator}`;
});
const dateStr = formattedSections.join('');
if (!isRTL) {
return dateStr;
}
// \u2066: start left-to-right isolation
// \u2067: start right-to-left isolation
// \u2068: start first strong character isolation
// \u2069: pop isolation
// wrap into an isolated group such that separators can split the string in smaller ones by adding \u2069\u2068
return `\u2066${dateStr}\u2069`;
};
export const getSectionsBoundaries = (utils, timezone) => {
const today = utils.dateWithTimezone(undefined, timezone);
const endOfYear = utils.endOfYear(today);
const endOfDay = utils.endOfDay(today);
const {
maxDaysInMonth,
longestMonth
} = getMonthsInYear(utils, today).reduce((acc, month) => {
const daysInMonth = utils.getDaysInMonth(month);
if (daysInMonth > acc.maxDaysInMonth) {
return {
maxDaysInMonth: daysInMonth,
longestMonth: month
};
}
return acc;
}, {
maxDaysInMonth: 0,
longestMonth: null
});
return {
year: ({
format
}) => ({
minimum: 0,
maximum: isFourDigitYearFormat(utils, timezone, format) ? 9999 : 99
}),
month: () => ({
minimum: 1,
// Assumption: All years have the same amount of months
maximum: utils.getMonth(endOfYear) + 1
}),
day: ({
currentDate
}) => ({
minimum: 1,
maximum: currentDate != null && utils.isValid(currentDate) ? utils.getDaysInMonth(currentDate) : maxDaysInMonth,
longestMonth: longestMonth
}),
weekDay: ({
format,
contentType
}) => {
if (contentType === 'digit') {
const daysInWeek = getDaysInWeekStr(utils, timezone, format).map(Number);
return {
minimum: Math.min(...daysInWeek),
maximum: Math.max(...daysInWeek)
};
}
return {
minimum: 1,
maximum: 7
};
},
hours: ({
format
}) => {
const lastHourInDay = utils.getHours(endOfDay);
const hasMeridiem = utils.formatByString(utils.endOfDay(today), format) !== lastHourInDay.toString();
if (hasMeridiem) {
return {
minimum: 1,
maximum: Number(utils.formatByString(utils.startOfDay(today), format))
};
}
return {
minimum: 0,
maximum: lastHourInDay
};
},
minutes: () => ({
minimum: 0,
// Assumption: All years have the same amount of minutes
maximum: utils.getMinutes(endOfDay)
}),
seconds: () => ({
minimum: 0,
// Assumption: All years have the same amount of seconds
maximum: utils.getSeconds(endOfDay)
}),
meridiem: () => ({
minimum: 0,
maximum: 0
})
};
};
let warnedOnceInvalidSection = false;
export const validateSections = (sections, valueType) => {
if (process.env.NODE_ENV !== 'production') {
if (!warnedOnceInvalidSection) {
const supportedSections = [];
if (['date', 'date-time'].includes(valueType)) {
supportedSections.push('weekDay', 'day', 'month', 'year');
}
if (['time', 'date-time'].includes(valueType)) {
supportedSections.push('hours', 'minutes', 'seconds', 'meridiem');
}
const invalidSection = sections.find(section => !supportedSections.includes(section.type));
if (invalidSection) {
console.warn(`MUI: The field component you are using is not compatible with the "${invalidSection.type} date section.`, `The supported date sections are ["${supportedSections.join('", "')}"]\`.`);
warnedOnceInvalidSection = true;
}
}
}
};
const transferDateSectionValue = (utils, timezone, section, dateToTransferFrom, dateToTransferTo) => {
switch (section.type) {
case 'year':
{
return utils.setYear(dateToTransferTo, utils.getYear(dateToTransferFrom));
}
case 'month':
{
return utils.setMonth(dateToTransferTo, utils.getMonth(dateToTransferFrom));
}
case 'weekDay':
{
const formattedDaysInWeek = getDaysInWeekStr(utils, timezone, section.format);
const dayInWeekStrOfActiveDate = utils.formatByString(dateToTransferFrom, section.format);
const dayInWeekOfActiveDate = formattedDaysInWeek.indexOf(dayInWeekStrOfActiveDate);
const dayInWeekOfNewSectionValue = formattedDaysInWeek.indexOf(section.value);
const diff = dayInWeekOfNewSectionValue - dayInWeekOfActiveDate;
return utils.addDays(dateToTransferFrom, diff);
}
case 'day':
{
return utils.setDate(dateToTransferTo, utils.getDate(dateToTransferFrom));
}
case 'meridiem':
{
const isAM = utils.getHours(dateToTransferFrom) < 12;
const mergedDateHours = utils.getHours(dateToTransferTo);
if (isAM && mergedDateHours >= 12) {
return utils.addHours(dateToTransferTo, -12);
}
if (!isAM && mergedDateHours < 12) {
return utils.addHours(dateToTransferTo, 12);
}
return dateToTransferTo;
}
case 'hours':
{
return utils.setHours(dateToTransferTo, utils.getHours(dateToTransferFrom));
}
case 'minutes':
{
return utils.setMinutes(dateToTransferTo, utils.getMinutes(dateToTransferFrom));
}
case 'seconds':
{
return utils.setSeconds(dateToTransferTo, utils.getSeconds(dateToTransferFrom));
}
default:
{
return dateToTransferTo;
}
}
};
const reliableSectionModificationOrder = {
year: 1,
month: 2,
day: 3,
weekDay: 4,
hours: 5,
minutes: 6,
seconds: 7,
meridiem: 8
};
export const mergeDateIntoReferenceDate = (utils, timezone, dateToTransferFrom, sections, referenceDate, shouldLimitToEditedSections) =>
// cloning sections before sort to avoid mutating it
[...sections].sort((a, b) => reliableSectionModificationOrder[a.type] - reliableSectionModificationOrder[b.type]).reduce((mergedDate, section) => {
if (!shouldLimitToEditedSections || section.modified) {
return transferDateSectionValue(utils, timezone, section, dateToTransferFrom, mergedDate);
}
return mergedDate;
}, referenceDate);
export const isAndroid = () => navigator.userAgent.toLowerCase().indexOf('android') > -1;
export const getSectionOrder = (sections, isRTL) => {
const neighbors = {};
if (!isRTL) {
sections.forEach((_, index) => {
const leftIndex = index === 0 ? null : index - 1;
const rightIndex = index === sections.length - 1 ? null : index + 1;
neighbors[index] = {
leftIndex,
rightIndex
};
});
return {
neighbors,
startIndex: 0,
endIndex: sections.length - 1
};
}
const rtl2ltr = {};
const ltr2rtl = {};
let groupedSectionsStart = 0;
let groupedSectionsEnd = 0;
let RTLIndex = sections.length - 1;
while (RTLIndex >= 0) {
groupedSectionsEnd = sections.findIndex(
// eslint-disable-next-line @typescript-eslint/no-loop-func
(section, index) => {
var _section$endSeparator;
return index >= groupedSectionsStart && ((_section$endSeparator = section.endSeparator) == null ? void 0 : _section$endSeparator.includes(' ')) &&
// Special case where the spaces were not there in the initial input
section.endSeparator !== ' / ';
});
if (groupedSectionsEnd === -1) {
groupedSectionsEnd = sections.length - 1;
}
for (let i = groupedSectionsEnd; i >= groupedSectionsStart; i -= 1) {
ltr2rtl[i] = RTLIndex;
rtl2ltr[RTLIndex] = i;
RTLIndex -= 1;
}
groupedSectionsStart = groupedSectionsEnd + 1;
}
sections.forEach((_, index) => {
const rtlIndex = ltr2rtl[index];
const leftIndex = rtlIndex === 0 ? null : rtl2ltr[rtlIndex - 1];
const rightIndex = rtlIndex === sections.length - 1 ? null : rtl2ltr[rtlIndex + 1];
neighbors[index] = {
leftIndex,
rightIndex
};
});
return {
neighbors,
startIndex: rtl2ltr[0],
endIndex: rtl2ltr[sections.length - 1]
};
};