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test for strftime
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harttle
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var monthNames = [
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"January", "February", "March", "April", "May", "June", "July", "August",
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"September", "October", "November", "December"
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];
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var monthNamesShort = [
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"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct",
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"Nov", "Dec"
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];
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var dayNames = [
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"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
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];
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var dayNamesShort = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
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var suffixes = {
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1: 'st',
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2: 'nd',
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3: 'rd',
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'default': 'th'
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};
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// prototype extensions
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var _date = {
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daysInMonth: function(d) {
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var feb = _date.isLeapYear(d) ? 29 : 28;
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return [31, feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
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},
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getTimezone: function(d) {
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return d.toString().replace(
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/^.*? ([A-Z]{3}) [0-9]{4}.*$/, "$1"
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).replace(
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/^.*?\(([A-Z])[a-z]+ ([A-Z])[a-z]+ ([A-Z])[a-z]+\)$/, "$1$2$3"
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);
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},
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getGMTOffset: function(d) {
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return (d.getTimezoneOffset() > 0 ? "-" : "+") +
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_number.pad(Math.floor(d.getTimezoneOffset() / 60), 2) +
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_number.pad(d.getTimezoneOffset() % 60, 2);
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},
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getDayOfYear: function(d) {
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var num = 0;
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for (var i = 0; i < d.getMonth(); ++i) {
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num += _date.daysInMonth(d)[i];
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}
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return num + d.getDate();
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},
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// Startday is an integer of which day to start the week measuring from
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// TODO: that comment was retarted. fix it.
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getWeekOfYear: function(d, startDay) {
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// Skip to startDay of this week
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var now = this.getDayOfYear(d) + (startDay - d.getDay());
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// Find the first startDay of the year
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var jan1 = new Date(d.getFullYear(), 0, 1);
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var then = (7 - jan1.getDay() + startDay);
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return _number.pad(Math.floor((now - then) / 7) + 1, 2);
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},
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isLeapYear: function(d) {
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var year = d.getFullYear();
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return !!((year & 3) === 0 && (year % 100 || (year % 400 === 0 && year)));
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},
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getFirstDayOfMonth: function(d) {
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var day = (d.getDay() - (d.getDate() - 1)) % 7;
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return (day < 0) ? (day + 7) : day;
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},
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getLastDayOfMonth: function(d) {
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var day = (d.getDay() + (_date.daysInMonth(d)[d.getMonth()] - d.getDate())) % 7;
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return (day < 0) ? (day + 7) : day;
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},
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getSuffix: function(d) {
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var str = d.getDate().toString();
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var index = parseInt(str.slice(-1));
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return suffixes[index] || suffixes['default'];
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},
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applyOffset: function(date, offset_seconds) {
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date.setTime(date.valueOf() - offset_seconds * 1000);
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return date;
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},
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century: function(d) {
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return parseInt(d.getFullYear().toString().substring(0, 2), 10);
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}
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};
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var _number = {
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pad: function(value, size, ch) {
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if (!ch) ch = '0';
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var result = value.toString();
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var pad = size - result.length;
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while (pad-- > 0) {
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result = ch + result;
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}
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return result;
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}
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};
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var format_codes = {
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a: function(d) {
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return dayNamesShort[d.getDay()];
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},
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A: function(d) {
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return dayNames[d.getDay()];
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},
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b: function(d) {
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return monthNamesShort[d.getMonth()];
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},
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B: function(d) {
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return monthNames[d.getMonth()];
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},
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c: function(d) {
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return d.toLocaleString();
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},
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C: function(d) {
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return _date.century(d);
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},
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d: function(d) {
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return _number.pad(d.getDate(), 2);
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},
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e: function(d) {
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return _number.pad(d.getDate(), 2, ' ');
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},
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H: function(d) {
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return _number.pad(d.getHours(), 2);
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},
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I: function(d) {
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return _number.pad(d.getHours() % 12 || 12, 2);
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},
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j: function(d) {
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return _number.pad(_date.getDayOfYear(d), 3);
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},
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k: function(d) {
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return _number.pad(d.getHours(), 2, ' ');
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},
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l: function(d) {
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return _number.pad(d.getHours() % 12 || 12, 2, ' ');
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},
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L: function(d) {
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return _number.pad(d.getMilliseconds(), 3);
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},
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m: function(d) {
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return _number.pad(d.getMonth() + 1, 2);
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},
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M: function(d) {
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return _number.pad(d.getMinutes(), 2);
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},
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p: function(d) {
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return (d.getHours() < 12 ? 'AM' : 'PM');
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},
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P: function(d) {
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return (d.getHours() < 12 ? 'am' : 'pm');
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},
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q: function(d) {
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return _date.getSuffix(d);
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},
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s: function(d) {
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return Math.round(d.valueOf() / 1000);
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},
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S: function(d) {
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return _number.pad(d.getSeconds(), 2);
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},
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u: function(d) {
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return d.getDay() || 7;
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},
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U: function(d) {
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return _date.getWeekOfYear(d, 0);
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},
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w: function(d) {
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return d.getDay();
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},
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W: function(d) {
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return _date.getWeekOfYear(d, 1);
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},
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x: function(d) {
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return d.toLocaleDateString();
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},
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X: function(d) {
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return d.toLocaleTimeString();
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},
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y: function(d) {
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return d.getFullYear().toString().substring(2, 4);
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},
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Y: function(d) {
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return d.getFullYear();
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},
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// TODO: guessing the pad function won't work with negative numbers?
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// TODO: getTimezoneOffset returns a positive number for GMT-7. Verify my
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// assumption that it will return negative for GMT+x
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z: function(d) {
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var tz = d.getTimezoneOffset() / 60 * 100;
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return (tz > 0 ? '-' : '+') + _number.pad(tz, 4);
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},
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"%": function() {
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return '%';
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}
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};
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format_codes.h = format_codes.b;
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format_codes.N = format_codes.L;
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var strftime = function(d, format) {
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// I used to use string split with a regex and a capturing block here,
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// which I thought was really clever, but apparently this exact feature is
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// fucked in IE. In every other browser (and languages), the captured
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// blocks are present in the output. E.g.
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// var pairs = "hello%athere".split(/(%.)/);
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// => ['hello', '%a', 'there']
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// IE however, just treats it the same as if no capturing block is present
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// => ['hello', 'there']
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// An alternate implementation of split is available here
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// http://blog.stevenlevithan.com/archives/cross-browser-split
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// Because that's a large amount of code for this one specific use case,
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// I've just decided to loop through a regex instead.
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var output = '';
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var remaining = format;
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while (true) {
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var r = /%./g;
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var results = r.exec(remaining);
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// No more format codes. Add the remaining text and return
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if (!results) {
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return output + remaining;
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}
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// Add the preceding text
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output += remaining.slice(0, r.lastIndex - 2);
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remaining = remaining.slice(r.lastIndex);
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// Add the format code
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var ch = results[0].charAt(1);
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var func = format_codes[ch];
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output += func ? func.call(this, d) : '%' + ch;
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}
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};
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module.exports = strftime;
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