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StdLib.js
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2011-06-16
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168 lines
 Date.fromString = (function () {
var defaults = {
order : 'MDY',
strict : false
};
var months = ["JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG",
"SEP", "OCT", "NOV", "DEC"];
var abs = ["AM", "PM", "AFTERNOON", "MORNING"];
var mark = function (str, val) {
var lval = val.toLowerCase();
var regex = new RegExp('^' + lval + '|(.*[^:alpha:])' + lval, 'g');
return str.replace(regex, '$1' + val);
};
var normalize = function (str) {
str = str.toLowerCase();
str = str.replace(/[^:a-z0-9]/g, '-');
for (var i=0; i<months.length; i++) str = mark(str, months[i]);
for (var i=0; i<abs.length; i++) str = mark(str, abs[i]);
str = str.replace(/[a-z]/g, '');
str = str.replace(/([0-9])([A-Z])/g, '$1-$2');
str = ('-' + str + '-').replace(/-+/g, '-');
return str;
};
var find_time = function (norm) {
var obj = {date:norm, time:''};
obj.time = norm.replace(/^.*-(\d\d?(:\d\d){1,2}(-(AM|PM))?)-.*$/, '$1');
if (obj.time == obj.date)
obj.time = norm.replace(/^.*-(\d\d?-(AM|PM))-.*$/, '$1');
if (obj.time == obj.date) obj.time = '';
obj.date = norm.replace(obj.time, '');
obj.time = ('-' + obj.time + '-').replace(/-+/g, '-');
obj.date = ('-' + obj.date + '-').replace(/-+/g, '-');
return obj;
};
var find_year = function (norm) {
var year = null;
// Check for a 4-digit year
year = norm.replace(/^.*-(\d\d\d\d)-.*$/, '$1');
if (year != norm) return year; else year = null;
// Check for a 2-digit year, over 32.
year = norm.replace(/^.*-((3[2-9])|([4-9][0-9]))-.*$/, '$1');
if (year != norm) return year; else year = null;
// Check for a single 2-digit number with a leading 0
var matches = norm.match(/-0\d-/g);
if (matches && matches.length == 1) return matches[0].substring(1,3);
// Day is always by month, so check for explicit months in
// first or third spot
year = norm.replace(/^.*-[A-Z]{3}-\d\d?-(\d\d?)-.*$/, '$1');
if (year != norm) return year; else year = null;
year = norm.replace(/^.*-(\d\d?)-\d\d?-[A-Z]{3}-.*$/, '$1');
if (year != norm) return year; else year = null;
// If all else fails, use the setting for the position of the year.
var pos = '$3';
if (defaults.opts.order.charAt(0) == 'Y') pos = '$1';
else if (defaults.opts.order.charAt(1) == 'Y') pos = '$2';
year = norm.replace(/^.*-(\d\d?)-([A-Z]{3}|\d{1,2})-(\d\d?)-.*$/, pos);
if (year != norm) return year; else year = null;
return year;
};
var find_month = function (norm, year) {
// Check for an explicity month
var matches = norm.match(/[A-Z]{3}/);
if (matches && matches.length) return matches[0];
// Remove the year, and unless obviously wrong, use order
// to chose which one to use for month.
var parts = norm.replace(year + '-', '').split('-');
if (parts.length != 4) return null;
var order = defaults.opts.order;
var md = order.indexOf('M') < order.indexOf('D')? 1: 2;
return (parseInt(parts[md], 10) <= 12)? parts[md]: parts[md==1? 2: 1];
};
var find_day = function (norm, year, month) {
return norm.replace(year, '').replace(month, '').replace(/-/g, '');
};
var create_absolute = function (obj) {
var time = obj.time.replace(/[-APM]/g, '');
var parts = time.split(':');
parts[1] = parts[1] || 0;
parts[2] = parts[2] || 0;
var ihr = parseInt(parts[0], 10);
if (obj.time.match(/-AM-/) && ihr == 12) parts[0] = 0;
else if (obj.time.match(/-PM-/) && ihr < 12) parts[0] = ihr + 12;
parts[0] = ("0" + parts[0]).substring(("0" + parts[0]).length - 2);
parts[1] = ("0" + parts[1]).substring(("0" + parts[1]).length - 2);
parts[2] = ("0" + parts[2]).substring(("0" + parts[2]).length - 2);
time = parts.join(':');
var strict = defaults.opts.strict;
if (!obj.year && !strict) obj.year = (new Date()).getFullYear();
var year = parseInt(obj.year, 10);
if (year < 100) {
year += (year<70? 2000: 1900);
}
if (!obj.month && !strict) obj.month = (new Date()).getMonth() + 1;
var month = String(obj.month);
if (month.match(/[A-Z]{3}/)) {
month = "JAN-FEB-MAR-APR-MAY-JUN-JUL-AUG-SEP-OCT-NOV-DEC-"
.indexOf(month) / 4 + 1;
}
month = ("0" + month).substring(("0" + month).length - 2);
if (!obj.day && !strict) obj.day = (new Date()).getDate();
var day = ("0" + obj.day).substring(("0" + obj.day).length - 2);
var date = new Date();
date.setTime(Date.parse(year + '/' + month + '/' + day + ' ' + time));
return date;
};
var parse = function (norm) {
return absolute(norm);
};
var absolute = function (norm) {
var obj = find_time(norm);
obj.norm = norm;
obj.year = find_year(obj.date);
obj.month = find_month(obj.date, obj.year);
obj.day = find_day(obj.date, obj.year, obj.month);
return create_absolute(obj);
};
return function (fuzz, opts) {
defaults.opts = { order: defaults.order, strict: defaults.strict };
if (opts && opts.order) defaults.opts.order = opts.order;
if (opts && opts.strict != undefined) defaults.opts.strict = opts.strict;
var date = parse(normalize(fuzz));
return date;
};
})();
if (typeof window.DOMParser != "undefined") {
function DOMParser() {}
DOMParser.prototype.parseFromString = function (str, contentType) {
if (window.ActiveXObject) {
var d = new ActiveXObject("MSXML.DomDocument");
d.loadXML(str);
return d;
} else if (window.XMLHttpRequest) {
var req = new XMLHttpRequest;
req.open("GET", "data:" + (contentType || "application/xml") +
";charset=utf-8," + encodeURIComponent(str), false);
if (req.overrideMimeType) {
req.overrideMimeType(contentType);
}
req.send(null);
return req.responseXML;
}
}
}
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, "");
}
String.prototype.ltrim = function() {
return this.replace(/^\s+/, "");
}
String.prototype.rtrim = function() {
return this.replace(/\s+$/, "");
}
String.prototype.bool = function() {
return (/^true$/i).test(this);
}