mirror of https://github.com/eleith/emailjs.git
51 lines
1.5 KiB
TypeScript
51 lines
1.5 KiB
TypeScript
/**
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* @param {Date} [date] an optional date to convert to RFC2822 format
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* @param {boolean} [useUtc] whether to parse the date as UTC (default: false)
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* @returns {string} the converted date
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*/
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export function getRFC2822Date(date = new Date(), useUtc = false) {
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if (useUtc) {
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return getRFC2822DateUTC(date);
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}
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const dates = date
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.toString()
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.replace('GMT', '')
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.replace(/\s\(.*\)$/, '')
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.split(' ');
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dates[0] = dates[0] + ',';
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const day = dates[1];
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dates[1] = dates[2];
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dates[2] = day;
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return dates.join(' ');
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}
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/**
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* @param {Date} [date] an optional date to convert to RFC2822 format (UTC)
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* @returns {string} the converted date
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*/
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export function getRFC2822DateUTC(date = new Date()) {
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const dates = date.toUTCString().split(' ');
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dates.pop(); // remove timezone
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dates.push('+0000');
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return dates.join(' ');
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}
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/**
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* RFC 2822 regex
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* @see https://tools.ietf.org/html/rfc2822#section-3.3
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* @see https://github.com/moment/moment/blob/a831fc7e2694281ce31e4f090bbcf90a690f0277/src/lib/create/from-string.js#L101
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*/
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const rfc2822re = /^(?:(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{4}))$/.compile();
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/**
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* @param {string} [date] a string to check for conformance to the [rfc2822](https://tools.ietf.org/html/rfc2822#section-3.3) standard
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* @returns {boolean} the result of the conformance check
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*/
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export function isRFC2822Date(date: string) {
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return rfc2822re.test(date);
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}
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