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import toDate from '../toDate/index.ts'import isValid from '../isValid/index.js'import addLeadingZeros from '../_lib/addLeadingZeros/index.js'import toInteger from '../_lib/toInteger/index.ts'
/** * @name formatRFC3339 * @category Common Helpers * @summary Format the date according to the RFC 3339 standard (https://tools.ietf.org/html/rfc3339#section-5.6). * * @description * Return the formatted date string in RFC 3339 format. Options may be passed to control the parts and notations of the date. * * @param {Date|Number} date - the original date * @param {Object} [options] - an object with options. * @param {0|1|2|3} [options.fractionDigits=0] - number of digits after the decimal point after seconds * @returns {String} the formatted date string * @throws {TypeError} 1 argument required * @throws {RangeError} `date` must not be Invalid Date * @throws {RangeError} `options.fractionDigits` must be between 0 and 3 * * @example * // Represent 18 September 2019 in RFC 3339 format: * const result = formatRFC3339(new Date(2019, 8, 18, 19, 0, 52)) * //=> '2019-09-18T19:00:52Z' * * @example * // Represent 18 September 2019 in RFC 3339 format, 2 digits of second fraction: * const result = formatRFC3339(new Date(2019, 8, 18, 19, 0, 52, 234), { fractionDigits: 2 }) * //=> '2019-09-18T19:00:52.23Z' * * @example * // Represent 18 September 2019 in RFC 3339 format, 3 digits of second fraction * const result = formatRFC3339(new Date(2019, 8, 18, 19, 0, 52, 234), { fractionDigits: 3 }) * //=> '2019-09-18T19:00:52.234Z' */export default function formatRFC3339(dirtyDate, dirtyOptions) {  if (arguments.length < 1) {    throw new TypeError(      `1 arguments required, but only ${arguments.length} present`    )  }
  const originalDate = toDate(dirtyDate)
  if (!isValid(originalDate)) {    throw new RangeError('Invalid time value')  }
  const options = dirtyOptions || {}  const fractionDigits =    options.fractionDigits == null ? 0 : toInteger(options.fractionDigits)
  // Test if fractionDigits is between 0 and 3 _and_ is not NaN  if (!(fractionDigits >= 0 && fractionDigits <= 3)) {    throw new RangeError('fractionDigits must be between 0 and 3 inclusively')  }
  const day = addLeadingZeros(originalDate.getDate(), 2)  const month = addLeadingZeros(originalDate.getMonth() + 1, 2)  const year = originalDate.getFullYear()
  const hour = addLeadingZeros(originalDate.getHours(), 2)  const minute = addLeadingZeros(originalDate.getMinutes(), 2)  const second = addLeadingZeros(originalDate.getSeconds(), 2)
  let fractionalSecond = ''  if (fractionDigits > 0) {    const milliseconds = originalDate.getMilliseconds()    const fractionalSeconds = Math.floor(      milliseconds * Math.pow(10, fractionDigits - 3)    )    fractionalSecond = '.' + addLeadingZeros(fractionalSeconds, fractionDigits)  }
  let offset = ''  const tzOffset = originalDate.getTimezoneOffset()
  if (tzOffset !== 0) {    const absoluteOffset = Math.abs(tzOffset)    const hourOffset = addLeadingZeros(toInteger(absoluteOffset / 60), 2)    const minuteOffset = addLeadingZeros(absoluteOffset % 60, 2)    // If less than 0, the sign is +, because it is ahead of time.    const sign = tzOffset < 0 ? '+' : '-'
    offset = `${sign}${hourOffset}:${minuteOffset}`  } else {    offset = 'Z'  }
  return `${year}-${month}-${day}T${hour}:${minute}:${second}${fractionalSecond}${offset}`}