/files/phpjs/0.1/datetime/strptime.js
JavaScript | 355 lines | 248 code | 19 blank | 88 comment | 23 complexity | b9d8b1ff314b3e9345316abe6135bd11 MD5 | raw file
- function strptime (dateStr, format) {
- // http://kevin.vanzonneveld.net
- // + original by: Brett Zamir (http://brett-zamir.me)
- // + based on: strftime
- // - depends on: setlocale
- // - depends on: array_map
- // * example 1: strptime('20091112222135', '%Y%m%d%H%M%S'); // Return value will depend on date and locale
- // * returns 1: {tm_sec: 35, tm_min: 21, tm_hour: 22, tm_mday: 12, tm_mon: 10, tm_year: 109, tm_wday: 4, tm_yday: 315, unparsed: ''}
- // * example 1: strptime('2009extra', '%Y');
- // * returns 1: {tm_sec:0, tm_min:0, tm_hour:0, tm_mday:0, tm_mon:0, tm_year:109, tm_wday:3, tm_yday: -1, unparsed: 'extra'}
- // tm_isdst is in other docs; why not PHP?
- // Needs more thorough testing and examples
- var retObj = {
- tm_sec: 0,
- tm_min: 0,
- tm_hour: 0,
- tm_mday: 0,
- tm_mon: 0,
- tm_year: 0,
- tm_wday: 0,
- tm_yday: 0,
- unparsed: ''
- },
- that = this,
- amPmOffset = 0,
- prevHour = false,
- _date = function () {
- var o = retObj;
- // We set date to at least 1 to ensure year or month doesn't go backwards
- return _reset(new Date(Date.UTC(o.tm_year + 1900, o.tm_mon, o.tm_mday || 1, o.tm_hour, o.tm_min, o.tm_sec)), o.tm_mday);
- },
- _reset = function (dateObj, realMday) {
- // realMday is to allow for a value of 0 in return results (but without
- // messing up the Date() object)
- var o = retObj;
- var d = dateObj;
- o.tm_sec = d.getUTCSeconds();
- o.tm_min = d.getUTCMinutes();
- o.tm_hour = d.getUTCHours();
- o.tm_mday = realMday === 0 ? realMday : d.getUTCDate();
- o.tm_mon = d.getUTCMonth();
- o.tm_year = d.getUTCFullYear() - 1900;
- o.tm_wday = realMday === 0 ? (d.getUTCDay() > 0 ? d.getUTCDay() - 1 : 6) : d.getUTCDay();
- var jan1 = new Date(Date.UTC(d.getUTCFullYear(), 0, 1));
- o.tm_yday = Math.ceil((d - jan1) / (1000 * 60 * 60 * 24));
- };
- // BEGIN STATIC
- var _NWS = /\S/,
- _WS = /\s/;
- var _aggregates = {
- c: 'locale',
- D: '%m/%d/%y',
- F: '%y-%m-%d',
- r: 'locale',
- R: '%H:%M',
- T: '%H:%M:%S',
- x: 'locale',
- X: 'locale'
- };
- /* Fix: Locale alternatives are supported though not documented in PHP; see http://linux.die.net/man/3/strptime
- Ec
- EC
- Ex
- EX
- Ey
- EY
- Od or Oe
- OH
- OI
- Om
- OM
- OS
- OU
- Ow
- OW
- Oy
- */
- var _preg_quote = function (str) {
- return (str + '').replace(/([\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!<>\|\:])/g, '\\$1');
- };
- // END STATIC
- // BEGIN REDUNDANT
- this.php_js = this.php_js || {};
- this.setlocale('LC_ALL', 0); // ensure setup of localization variables takes place
- // END REDUNDANT
- var phpjs = this.php_js;
- var locale = phpjs.localeCategories.LC_TIME;
- var locales = phpjs.locales;
- var lc_time = locales[locale].LC_TIME;
- // First replace aggregates (run in a loop because an agg may be made up of other aggs)
- while (format.match(/%[cDFhnrRtTxX]/)) {
- format = format.replace(/%([cDFhnrRtTxX])/g, function (m0, m1) {
- var f = _aggregates[m1];
- return (f === 'locale' ? lc_time[m1] : f);
- });
- }
- var _addNext = function (j, regex, cb) {
- if (typeof regex === 'string') {
- regex = new RegExp('^' + regex, 'i');
- }
- var check = dateStr.slice(j);
- var match = regex.exec(check);
- // Even if the callback returns null after assigning to the return object, the object won't be saved anyways
- var testNull = match ? cb.apply(null, match) : null;
- if (testNull === null) {
- throw 'No match in string';
- }
- return j + match[0].length;
- };
- var _addLocalized = function (j, formatChar, category) {
- return _addNext(j, that.array_map(
- _preg_quote, lc_time[formatChar]).join('|'), // Could make each parenthesized instead and pass index to callback
- function (m) {
- var match = lc_time[formatChar].search(new RegExp('^' + _preg_quote(m) + '$', 'i'));
- if (match) {
- retObj[category] = match[0];
- }
- });
- };
- // BEGIN PROCESSING CHARACTERS
- for (var i = 0, j = 0; i < format.length; i++) {
- if (format.charAt(i) === '%') {
- var literalPos = ['%', 'n', 't'].indexOf(format.charAt(i + 1));
- if (literalPos !== -1) {
- if (['%', '\n', '\t'].indexOf(dateStr.charAt(j)) === literalPos) { // a matched literal
- ++i, ++j; // skip beyond
- continue;
- }
- // Format indicated a percent literal, but not actually present
- return false;
- }
- var formatChar = format.charAt(i + 1);
- try {
- switch (formatChar) {
- case 'a':
- // Fall-through // Sun-Sat
- case 'A':
- // Sunday-Saturday
- j = _addLocalized(j, formatChar, 'tm_wday'); // Changes nothing else
- break;
- case 'h':
- // Fall-through (alias of 'b');
- case 'b':
- // Jan-Dec
- j = _addLocalized(j, 'b', 'tm_mon');
- _date(); // Also changes wday, yday
- break;
- case 'B':
- // January-December
- j = _addLocalized(j, formatChar, 'tm_mon');
- _date(); // Also changes wday, yday
- break;
- case 'C':
- // 0+; century (19 for 20th)
- j = _addNext(j, /^\d?\d/, // PHP docs say two-digit, but accepts one-digit (two-digit max)
- function (d) {
- var year = (parseInt(d, 10) - 19) * 100;
- retObj.tm_year = year;
- _date();
- if (!retObj.tm_yday) {
- retObj.tm_yday = -1;
- }
- // Also changes wday; and sets yday to -1 (always?)
- });
- break;
- case 'd':
- // Fall-through 01-31 day
- case 'e':
- // 1-31 day
- j = _addNext(j, formatChar === 'd' ? /^(0[1-9]|[1-2]\d|3[0-1])/ : /^([1-2]\d|3[0-1]|[1-9])/, function (d) {
- var dayMonth = parseInt(d, 10);
- retObj.tm_mday = dayMonth;
- _date(); // Also changes w_day, y_day
- });
- break;
- case 'g':
- // No apparent effect; 2-digit year (see 'V')
- break;
- case 'G':
- // No apparent effect; 4-digit year (see 'V')'
- break;
- case 'H':
- // 00-23 hours
- j = _addNext(j, /^([0-1]\d|2[0-3])/, function (d) {
- var hour = parseInt(d, 10);
- retObj.tm_hour = hour;
- // Changes nothing else
- });
- break;
- case 'l':
- // Fall-through of lower-case 'L'; 1-12 hours
- case 'I':
- // 01-12 hours
- j = _addNext(j, formatChar === 'l' ? /^([1-9]|1[0-2])/ : /^(0[1-9]|1[0-2])/, function (d) {
- var hour = parseInt(d, 10) - 1 + amPmOffset;
- retObj.tm_hour = hour;
- prevHour = true; // Used for coordinating with am-pm
- // Changes nothing else, but affected by prior 'p/P'
- });
- break;
- case 'j':
- // 001-366 day of year
- j = _addNext(j, /^(00[1-9]|0[1-9]\d|[1-2]\d\d|3[0-6][0-6])/, function (d) {
- var dayYear = parseInt(d, 10) - 1;
- retObj.tm_yday = dayYear;
- // Changes nothing else (oddly, since if based on a given year, could calculate other fields)
- });
- break;
- case 'm':
- // 01-12 month
- j = _addNext(j, /^(0[1-9]|1[0-2])/, function (d) {
- var month = parseInt(d, 10) - 1;
- retObj.tm_mon = month;
- _date(); // Also sets wday and yday
- });
- break;
- case 'M':
- // 00-59 minutes
- j = _addNext(j, /^[0-5]\d/, function (d) {
- var minute = parseInt(d, 10);
- retObj.tm_min = minute;
- // Changes nothing else
- });
- break;
- case 'P':
- // Seems not to work; AM-PM
- return false; // Could make fall-through instead since supposed to be a synonym despite PHP docs
- case 'p':
- // am-pm
- j = _addNext(j, /^(am|pm)/i, function (d) {
- // No effect on 'H' since already 24 hours but
- // works before or after setting of l/I hour
- amPmOffset = (/a/).test(d) ? 0 : 12;
- if (prevHour) {
- retObj.tm_hour += amPmOffset;
- }
- });
- break;
- case 's':
- // Unix timestamp (in seconds)
- j = _addNext(j, /^\d+/, function (d) {
- var timestamp = parseInt(d, 10);
- var date = new Date(Date.UTC(timestamp * 1000));
- _reset(date);
- // Affects all fields, but can't be negative (and initial + not allowed)
- });
- break;
- case 'S':
- // 00-59 seconds
- j = _addNext(j, /^[0-5]\d/, // strptime also accepts 60-61 for some reason
- function (d) {
- var second = parseInt(d, 10);
- retObj.tm_sec = second;
- // Changes nothing else
- });
- break;
- case 'u':
- // Fall-through; 1 (Monday)-7(Sunday)
- case 'w':
- // 0 (Sunday)-6(Saturday)
- j = _addNext(j, /^\d/, function (d) {
- retObj.tm_wday = d - (formatChar === 'u');
- // Changes nothing else apparently
- });
- break;
- case 'U':
- // Fall-through (week of year, from 1st Sunday)
- case 'V':
- // Fall-through (ISO-8601:1988 week number; from first 4-weekday week, starting with Monday)
- case 'W':
- // Apparently ignored (week of year, from 1st Monday)
- break;
- case 'y':
- // 69 (or higher) for 1969+, 68 (or lower) for 2068-
- j = _addNext(j, /^\d?\d/, // PHP docs say two-digit, but accepts one-digit (two-digit max)
- function (d) {
- d = parseInt(d, 10);
- var year = d >= 69 ? d : d + 100;
- retObj.tm_year = year;
- _date();
- if (!retObj.tm_yday) {
- retObj.tm_yday = -1;
- }
- // Also changes wday; and sets yday to -1 (always?)
- });
- break;
- case 'Y':
- // 2010 (4-digit year)
- j = _addNext(j, /^\d{1,4}/, // PHP docs say four-digit, but accepts one-digit (four-digit max)
- function (d) {
- var year = (parseInt(d, 10)) - 1900;
- retObj.tm_year = year;
- _date();
- if (!retObj.tm_yday) {
- retObj.tm_yday = -1;
- }
- // Also changes wday; and sets yday to -1 (always?)
- });
- break;
- case 'z':
- // Timezone; on my system, strftime gives -0800, but strptime seems not to alter hour setting
- break;
- case 'Z':
- // Timezone; on my system, strftime gives PST, but strptime treats text as unparsed
- break;
- default:
- throw 'Unrecognized formatting character in strptime()';
- break;
- }
- } catch (e) {
- if (e === 'No match in string') { // Allow us to exit
- return false; // There was supposed to be a matching format but there wasn't
- }
- }++i; // Calculate skipping beyond initial percent too
- } else if (format.charAt(i) !== dateStr.charAt(j)) {
- // If extra whitespace at beginning or end of either, or between formats, no problem
- // (just a problem when between % and format specifier)
- // If the string has white-space, it is ok to ignore
- if (dateStr.charAt(j).search(_WS) !== -1) {
- j++;
- i--; // Let the next iteration try again with the same format character
- } else if (format.charAt(i).search(_NWS) !== -1) { // Any extra formatting characters besides white-space causes
- // problems (do check after WS though, as may just be WS in string before next character)
- return false;
- } else { // Extra WS in format
- // Adjust strings when encounter non-matching whitespace, so they align in future checks above
- // Will check on next iteration (against same (non-WS) string character)
- }
- } else {
- j++;
- }
- }
- // POST-PROCESSING
- retObj.unparsed = dateStr.slice(j); // Will also get extra whitespace; empty string if none
- return retObj;
- }