268 lines
8.6 KiB
JavaScript
268 lines
8.6 KiB
JavaScript
function strtotime (text, now) {
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// discuss at: http://locutus.io/php/strtotime/
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// original by: Caio Ariede (http://caioariede.com)
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// improved by: Kevin van Zonneveld (http://kvz.io)
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// improved by: Caio Ariede (http://caioariede.com)
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// improved by: A. Matías Quezada (http://amatiasq.com)
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// improved by: preuter
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// improved by: Brett Zamir (http://brett-zamir.me)
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// improved by: Mirko Faber
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// input by: David
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// bugfixed by: Wagner B. Soares
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// bugfixed by: Artur Tchernychev
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// bugfixed by: Stephan Bösch-Plepelits (http://github.com/plepe)
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// note 1: Examples all have a fixed timestamp to prevent
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// note 1: tests to fail because of variable time(zones)
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// example 1: strtotime('+1 day', 1129633200)
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// returns 1: 1129719600
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// example 2: strtotime('+1 week 2 days 4 hours 2 seconds', 1129633200)
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// returns 2: 1130425202
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// example 3: strtotime('last month', 1129633200)
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// returns 3: 1127041200
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// example 4: strtotime('2009-05-04 08:30:00 GMT')
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// returns 4: 1241425800
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// example 5: strtotime('2009-05-04 08:30:00+00')
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// returns 5: 1241425800
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// example 6: strtotime('2009-05-04 08:30:00+02:00')
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// returns 6: 1241418600
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// example 7: strtotime('2009-05-04T08:30:00Z')
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// returns 7: 1241425800
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var parsed
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var match
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var today
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var year
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var date
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var days
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var ranges
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var len
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var times
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var regex
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var i
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var fail = false
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if (!text) {
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return fail
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}
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// Unecessary spaces
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text = text.replace(/^\s+|\s+$/g, '')
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.replace(/\s{2,}/g, ' ')
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.replace(/[\t\r\n]/g, '')
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.toLowerCase()
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// in contrast to php, js Date.parse function interprets:
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// dates given as yyyy-mm-dd as in timezone: UTC,
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// dates with "." or "-" as MDY instead of DMY
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// dates with two-digit years differently
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// etc...etc...
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// ...therefore we manually parse lots of common date formats
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var pattern = new RegExp([
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'^(\\d{1,4})',
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'([\\-\\.\\/:])',
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'(\\d{1,2})',
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'([\\-\\.\\/:])',
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'(\\d{1,4})',
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'(?:\\s(\\d{1,2}):(\\d{2})?:?(\\d{2})?)?',
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'(?:\\s([A-Z]+)?)?$'
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].join(''))
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match = text.match(pattern)
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if (match && match[2] === match[4]) {
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if (match[1] > 1901) {
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switch (match[2]) {
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case '-':
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// YYYY-M-D
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if (match[3] > 12 || match[5] > 31) {
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return fail
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}
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return new Date(match[1], parseInt(match[3], 10) - 1, match[5],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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case '.':
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// YYYY.M.D is not parsed by strtotime()
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return fail
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case '/':
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// YYYY/M/D
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if (match[3] > 12 || match[5] > 31) {
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return fail
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}
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return new Date(match[1], parseInt(match[3], 10) - 1, match[5],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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}
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} else if (match[5] > 1901) {
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switch (match[2]) {
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case '-':
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// D-M-YYYY
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if (match[3] > 12 || match[1] > 31) {
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return fail
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}
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return new Date(match[5], parseInt(match[3], 10) - 1, match[1],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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case '.':
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// D.M.YYYY
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if (match[3] > 12 || match[1] > 31) {
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return fail
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}
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return new Date(match[5], parseInt(match[3], 10) - 1, match[1],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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case '/':
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// M/D/YYYY
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if (match[1] > 12 || match[3] > 31) {
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return fail
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}
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return new Date(match[5], parseInt(match[1], 10) - 1, match[3],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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}
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} else {
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switch (match[2]) {
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case '-':
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// YY-M-D
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if (match[3] > 12 || match[5] > 31 || (match[1] < 70 && match[1] > 38)) {
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return fail
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}
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year = match[1] >= 0 && match[1] <= 38 ? +match[1] + 2000 : match[1]
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return new Date(year, parseInt(match[3], 10) - 1, match[5],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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case '.':
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// D.M.YY or H.MM.SS
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if (match[5] >= 70) {
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// D.M.YY
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if (match[3] > 12 || match[1] > 31) {
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return fail
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}
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return new Date(match[5], parseInt(match[3], 10) - 1, match[1],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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}
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if (match[5] < 60 && !match[6]) {
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// H.MM.SS
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if (match[1] > 23 || match[3] > 59) {
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return fail
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}
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today = new Date()
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return new Date(today.getFullYear(), today.getMonth(), today.getDate(),
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match[1] || 0, match[3] || 0, match[5] || 0, match[9] || 0) / 1000
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}
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// invalid format, cannot be parsed
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return fail
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case '/':
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// M/D/YY
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if (match[1] > 12 || match[3] > 31 || (match[5] < 70 && match[5] > 38)) {
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return fail
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}
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year = match[5] >= 0 && match[5] <= 38 ? +match[5] + 2000 : match[5]
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return new Date(year, parseInt(match[1], 10) - 1, match[3],
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match[6] || 0, match[7] || 0, match[8] || 0, match[9] || 0) / 1000
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case ':':
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// HH:MM:SS
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if (match[1] > 23 || match[3] > 59 || match[5] > 59) {
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return fail
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}
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today = new Date()
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return new Date(today.getFullYear(), today.getMonth(), today.getDate(),
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match[1] || 0, match[3] || 0, match[5] || 0) / 1000
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}
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}
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}
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// other formats and "now" should be parsed by Date.parse()
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if (text === 'now') {
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return now === null || isNaN(now)
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? new Date().getTime() / 1000 | 0
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: now | 0
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}
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if (!isNaN(parsed = Date.parse(text))) {
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return parsed / 1000 | 0
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}
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// Browsers !== Chrome have problems parsing ISO 8601 date strings, as they do
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// not accept lower case characters, space, or shortened time zones.
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// Therefore, fix these problems and try again.
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// Examples:
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// 2015-04-15 20:33:59+02
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// 2015-04-15 20:33:59z
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// 2015-04-15t20:33:59+02:00
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pattern = new RegExp([
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'^([0-9]{4}-[0-9]{2}-[0-9]{2})',
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'[ t]',
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'([0-9]{2}:[0-9]{2}:[0-9]{2}(\\.[0-9]+)?)',
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'([\\+-][0-9]{2}(:[0-9]{2})?|z)'
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].join(''))
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match = text.match(pattern)
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if (match) {
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// @todo: time zone information
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if (match[4] === 'z') {
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match[4] = 'Z'
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} else if (match[4].match(/^([+-][0-9]{2})$/)) {
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match[4] = match[4] + ':00'
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}
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if (!isNaN(parsed = Date.parse(match[1] + 'T' + match[2] + match[4]))) {
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return parsed / 1000 | 0
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}
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}
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date = now ? new Date(now * 1000) : new Date()
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days = {
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'sun': 0,
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'mon': 1,
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'tue': 2,
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'wed': 3,
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'thu': 4,
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'fri': 5,
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'sat': 6
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}
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ranges = {
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'yea': 'FullYear',
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'mon': 'Month',
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'day': 'Date',
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'hou': 'Hours',
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'min': 'Minutes',
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'sec': 'Seconds'
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}
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function lastNext (type, range, modifier) {
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var diff
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var day = days[range]
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if (typeof day !== 'undefined') {
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diff = day - date.getDay()
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if (diff === 0) {
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diff = 7 * modifier
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} else if (diff > 0 && type === 'last') {
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diff -= 7
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} else if (diff < 0 && type === 'next') {
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diff += 7
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}
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date.setDate(date.getDate() + diff)
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}
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}
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function process (val) {
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// @todo: Reconcile this with regex using \s, taking into account
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// browser issues with split and regexes
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var splt = val.split(' ')
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var type = splt[0]
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var range = splt[1].substring(0, 3)
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var typeIsNumber = /\d+/.test(type)
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var ago = splt[2] === 'ago'
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var num = (type === 'last' ? -1 : 1) * (ago ? -1 : 1)
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if (typeIsNumber) {
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num *= parseInt(type, 10)
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}
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if (ranges.hasOwnProperty(range) && !splt[1].match(/^mon(day|\.)?$/i)) {
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return date['set' + ranges[range]](date['get' + ranges[range]]() + num)
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}
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if (range === 'wee') {
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return date.setDate(date.getDate() + (num * 7))
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}
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if (type === 'next' || type === 'last') {
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lastNext(type, range, num)
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} else if (!typeIsNumber) {
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return false
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}
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return true
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}
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times = '(years?|months?|weeks?|days?|hours?|minutes?|min|seconds?|sec' +
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'|sunday|sun\\.?|monday|mon\\.?|tuesday|tue\\.?|wednesday|wed\\.?' +
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'|thursday|thu\\.?|friday|fri\\.?|saturday|sat\\.?)'
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regex = '([+-]?\\d+\\s' + times + '|' + '(last|next)\\s' + times + ')(\\sago)?'
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match = text.match(new RegExp(regex, 'gi'))
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if (!match) {
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return fail
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}
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for (i = 0, len = match.length; i < len; i++) {
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if (!process(match[i])) {
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return fail
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}
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}
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return (date.getTime() / 1000)
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}
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