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Directory : /var/app/comcon24/cms/node_modules/luxon/src/impl/

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Current File : /var/app/comcon24/cms/node_modules/luxon/src/impl/regexParser.js

import {
  untruncateYear,
  signedOffset,
  parseInteger,
  parseMillis,
  isUndefined,
  parseFloating,
} from "./util.js";
import * as English from "./english.js";
import FixedOffsetZone from "../zones/fixedOffsetZone.js";
import IANAZone from "../zones/IANAZone.js";

/*
 * This file handles parsing for well-specified formats. Here's how it works:
 * Two things go into parsing: a regex to match with and an extractor to take apart the groups in the match.
 * An extractor is just a function that takes a regex match array and returns a { year: ..., month: ... } object
 * parse() does the work of executing the regex and applying the extractor. It takes multiple regex/extractor pairs to try in sequence.
 * Extractors can take a "cursor" representing the offset in the match to look at. This makes it easy to combine extractors.
 * combineExtractors() does the work of combining them, keeping track of the cursor through multiple extractions.
 * Some extractions are super dumb and simpleParse and fromStrings help DRY them.
 */

const ianaRegex = /[A-Za-z_+-]{1,256}(?::?\/[A-Za-z0-9_+-]{1,256}(?:\/[A-Za-z0-9_+-]{1,256})?)?/;

function combineRegexes(...regexes) {
  const full = regexes.reduce((f, r) => f + r.source, "");
  return RegExp(`^${full}$`);
}

function combineExtractors(...extractors) {
  return (m) =>
    extractors
      .reduce(
        ([mergedVals, mergedZone, cursor], ex) => {
          const [val, zone, next] = ex(m, cursor);
          return [{ ...mergedVals, ...val }, zone || mergedZone, next];
        },
        [{}, null, 1]
      )
      .slice(0, 2);
}

function parse(s, ...patterns) {
  if (s == null) {
    return [null, null];
  }

  for (const [regex, extractor] of patterns) {
    const m = regex.exec(s);
    if (m) {
      return extractor(m);
    }
  }
  return [null, null];
}

function simpleParse(...keys) {
  return (match, cursor) => {
    const ret = {};
    let i;

    for (i = 0; i < keys.length; i++) {
      ret[keys[i]] = parseInteger(match[cursor + i]);
    }
    return [ret, null, cursor + i];
  };
}

// ISO and SQL parsing
const offsetRegex = /(?:(Z)|([+-]\d\d)(?::?(\d\d))?)/;
const isoExtendedZone = `(?:${offsetRegex.source}?(?:\\[(${ianaRegex.source})\\])?)?`;
const isoTimeBaseRegex = /(\d\d)(?::?(\d\d)(?::?(\d\d)(?:[.,](\d{1,30}))?)?)?/;
const isoTimeRegex = RegExp(`${isoTimeBaseRegex.source}${isoExtendedZone}`);
const isoTimeExtensionRegex = RegExp(`(?:T${isoTimeRegex.source})?`);
const isoYmdRegex = /([+-]\d{6}|\d{4})(?:-?(\d\d)(?:-?(\d\d))?)?/;
const isoWeekRegex = /(\d{4})-?W(\d\d)(?:-?(\d))?/;
const isoOrdinalRegex = /(\d{4})-?(\d{3})/;
const extractISOWeekData = simpleParse("weekYear", "weekNumber", "weekDay");
const extractISOOrdinalData = simpleParse("year", "ordinal");
const sqlYmdRegex = /(\d{4})-(\d\d)-(\d\d)/; // dumbed-down version of the ISO one
const sqlTimeRegex = RegExp(
  `${isoTimeBaseRegex.source} ?(?:${offsetRegex.source}|(${ianaRegex.source}))?`
);
const sqlTimeExtensionRegex = RegExp(`(?: ${sqlTimeRegex.source})?`);

function int(match, pos, fallback) {
  const m = match[pos];
  return isUndefined(m) ? fallback : parseInteger(m);
}

function extractISOYmd(match, cursor) {
  const item = {
    year: int(match, cursor),
    month: int(match, cursor + 1, 1),
    day: int(match, cursor + 2, 1),
  };

  return [item, null, cursor + 3];
}

function extractISOTime(match, cursor) {
  const item = {
    hours: int(match, cursor, 0),
    minutes: int(match, cursor + 1, 0),
    seconds: int(match, cursor + 2, 0),
    milliseconds: parseMillis(match[cursor + 3]),
  };

  return [item, null, cursor + 4];
}

function extractISOOffset(match, cursor) {
  const local = !match[cursor] && !match[cursor + 1],
    fullOffset = signedOffset(match[cursor + 1], match[cursor + 2]),
    zone = local ? null : FixedOffsetZone.instance(fullOffset);
  return [{}, zone, cursor + 3];
}

function extractIANAZone(match, cursor) {
  const zone = match[cursor] ? IANAZone.create(match[cursor]) : null;
  return [{}, zone, cursor + 1];
}

// ISO time parsing

const isoTimeOnly = RegExp(`^T?${isoTimeBaseRegex.source}$`);

// ISO duration parsing

const isoDuration =
  /^-?P(?:(?:(-?\d{1,20}(?:\.\d{1,20})?)Y)?(?:(-?\d{1,20}(?:\.\d{1,20})?)M)?(?:(-?\d{1,20}(?:\.\d{1,20})?)W)?(?:(-?\d{1,20}(?:\.\d{1,20})?)D)?(?:T(?:(-?\d{1,20}(?:\.\d{1,20})?)H)?(?:(-?\d{1,20}(?:\.\d{1,20})?)M)?(?:(-?\d{1,20})(?:[.,](-?\d{1,20}))?S)?)?)$/;

function extractISODuration(match) {
  const [s, yearStr, monthStr, weekStr, dayStr, hourStr, minuteStr, secondStr, millisecondsStr] =
    match;

  const hasNegativePrefix = s[0] === "-";
  const negativeSeconds = secondStr && secondStr[0] === "-";

  const maybeNegate = (num, force = false) =>
    num !== undefined && (force || (num && hasNegativePrefix)) ? -num : num;

  return [
    {
      years: maybeNegate(parseFloating(yearStr)),
      months: maybeNegate(parseFloating(monthStr)),
      weeks: maybeNegate(parseFloating(weekStr)),
      days: maybeNegate(parseFloating(dayStr)),
      hours: maybeNegate(parseFloating(hourStr)),
      minutes: maybeNegate(parseFloating(minuteStr)),
      seconds: maybeNegate(parseFloating(secondStr), secondStr === "-0"),
      milliseconds: maybeNegate(parseMillis(millisecondsStr), negativeSeconds),
    },
  ];
}

// These are a little braindead. EDT *should* tell us that we're in, say, America/New_York
// and not just that we're in -240 *right now*. But since I don't think these are used that often
// I'm just going to ignore that
const obsOffsets = {
  GMT: 0,
  EDT: -4 * 60,
  EST: -5 * 60,
  CDT: -5 * 60,
  CST: -6 * 60,
  MDT: -6 * 60,
  MST: -7 * 60,
  PDT: -7 * 60,
  PST: -8 * 60,
};

function fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr) {
  const result = {
    year: yearStr.length === 2 ? untruncateYear(parseInteger(yearStr)) : parseInteger(yearStr),
    month: English.monthsShort.indexOf(monthStr) + 1,
    day: parseInteger(dayStr),
    hour: parseInteger(hourStr),
    minute: parseInteger(minuteStr),
  };

  if (secondStr) result.second = parseInteger(secondStr);
  if (weekdayStr) {
    result.weekday =
      weekdayStr.length > 3
        ? English.weekdaysLong.indexOf(weekdayStr) + 1
        : English.weekdaysShort.indexOf(weekdayStr) + 1;
  }

  return result;
}

// RFC 2822/5322
const rfc2822 =
  /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|(?:([+-]\d\d)(\d\d)))$/;

function extractRFC2822(match) {
  const [
      ,
      weekdayStr,
      dayStr,
      monthStr,
      yearStr,
      hourStr,
      minuteStr,
      secondStr,
      obsOffset,
      milOffset,
      offHourStr,
      offMinuteStr,
    ] = match,
    result = fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr);

  let offset;
  if (obsOffset) {
    offset = obsOffsets[obsOffset];
  } else if (milOffset) {
    offset = 0;
  } else {
    offset = signedOffset(offHourStr, offMinuteStr);
  }

  return [result, new FixedOffsetZone(offset)];
}

function preprocessRFC2822(s) {
  // Remove comments and folding whitespace and replace multiple-spaces with a single space
  return s
    .replace(/\([^()]*\)|[\n\t]/g, " ")
    .replace(/(\s\s+)/g, " ")
    .trim();
}

// http date

const rfc1123 =
    /^(Mon|Tue|Wed|Thu|Fri|Sat|Sun), (\d\d) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) (\d{4}) (\d\d):(\d\d):(\d\d) GMT$/,
  rfc850 =
    /^(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday), (\d\d)-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)-(\d\d) (\d\d):(\d\d):(\d\d) GMT$/,
  ascii =
    /^(Mon|Tue|Wed|Thu|Fri|Sat|Sun) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) ( \d|\d\d) (\d\d):(\d\d):(\d\d) (\d{4})$/;

function extractRFC1123Or850(match) {
  const [, weekdayStr, dayStr, monthStr, yearStr, hourStr, minuteStr, secondStr] = match,
    result = fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr);
  return [result, FixedOffsetZone.utcInstance];
}

function extractASCII(match) {
  const [, weekdayStr, monthStr, dayStr, hourStr, minuteStr, secondStr, yearStr] = match,
    result = fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr);
  return [result, FixedOffsetZone.utcInstance];
}

const isoYmdWithTimeExtensionRegex = combineRegexes(isoYmdRegex, isoTimeExtensionRegex);
const isoWeekWithTimeExtensionRegex = combineRegexes(isoWeekRegex, isoTimeExtensionRegex);
const isoOrdinalWithTimeExtensionRegex = combineRegexes(isoOrdinalRegex, isoTimeExtensionRegex);
const isoTimeCombinedRegex = combineRegexes(isoTimeRegex);

const extractISOYmdTimeAndOffset = combineExtractors(
  extractISOYmd,
  extractISOTime,
  extractISOOffset,
  extractIANAZone
);
const extractISOWeekTimeAndOffset = combineExtractors(
  extractISOWeekData,
  extractISOTime,
  extractISOOffset,
  extractIANAZone
);
const extractISOOrdinalDateAndTime = combineExtractors(
  extractISOOrdinalData,
  extractISOTime,
  extractISOOffset,
  extractIANAZone
);
const extractISOTimeAndOffset = combineExtractors(
  extractISOTime,
  extractISOOffset,
  extractIANAZone
);

/*
 * @private
 */

export function parseISODate(s) {
  return parse(
    s,
    [isoYmdWithTimeExtensionRegex, extractISOYmdTimeAndOffset],
    [isoWeekWithTimeExtensionRegex, extractISOWeekTimeAndOffset],
    [isoOrdinalWithTimeExtensionRegex, extractISOOrdinalDateAndTime],
    [isoTimeCombinedRegex, extractISOTimeAndOffset]
  );
}

export function parseRFC2822Date(s) {
  return parse(preprocessRFC2822(s), [rfc2822, extractRFC2822]);
}

export function parseHTTPDate(s) {
  return parse(
    s,
    [rfc1123, extractRFC1123Or850],
    [rfc850, extractRFC1123Or850],
    [ascii, extractASCII]
  );
}

export function parseISODuration(s) {
  return parse(s, [isoDuration, extractISODuration]);
}

const extractISOTimeOnly = combineExtractors(extractISOTime);

export function parseISOTimeOnly(s) {
  return parse(s, [isoTimeOnly, extractISOTimeOnly]);
}

const sqlYmdWithTimeExtensionRegex = combineRegexes(sqlYmdRegex, sqlTimeExtensionRegex);
const sqlTimeCombinedRegex = combineRegexes(sqlTimeRegex);

const extractISOTimeOffsetAndIANAZone = combineExtractors(
  extractISOTime,
  extractISOOffset,
  extractIANAZone
);

export function parseSQL(s) {
  return parse(
    s,
    [sqlYmdWithTimeExtensionRegex, extractISOYmdTimeAndOffset],
    [sqlTimeCombinedRegex, extractISOTimeOffsetAndIANAZone]
  );
}

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