409 lines
15 KiB
JavaScript
409 lines
15 KiB
JavaScript
// ===================================================================
|
|
// Author: Matt Kruse <matt@mattkruse.com>
|
|
// WWW: http://www.mattkruse.com/
|
|
//
|
|
// NOTICE: You may use this code for any purpose, commercial or
|
|
// private, without any further permission from the author. You may
|
|
// remove this notice from your final code if you wish, however it is
|
|
// appreciated by the author if at least my web site address is kept.
|
|
//
|
|
// You may *NOT* re-distribute this code in any way except through its
|
|
// use. That means, you can include it in your product, or your web
|
|
// site, or any other form where the code is actually being used. You
|
|
// may not put the plain javascript up on your site for download or
|
|
// include it in your javascript libraries for download.
|
|
// If you wish to share this code with others, please just point them
|
|
// to the URL instead.
|
|
// Please DO NOT link directly to my .js files from your site. Copy
|
|
// the files to your server and use them there. Thank you.
|
|
// ===================================================================
|
|
|
|
// HISTORY
|
|
// ------------------------------------------------------------------
|
|
// May 17, 2003: Fixed bug in parseDate() for dates <1970
|
|
// March 11, 2003: Added parseDate() function
|
|
// March 11, 2003: Added "NNN" formatting option. Doesn't match up
|
|
// perfectly with SimpleDateFormat formats, but
|
|
// backwards-compatability was required.
|
|
|
|
// ------------------------------------------------------------------
|
|
// These functions use the same 'format' strings as the
|
|
// java.text.SimpleDateFormat class, with minor exceptions.
|
|
// The format string consists of the following abbreviations:
|
|
//
|
|
// Field | Full Form | Short Form
|
|
// -------------+--------------------+-----------------------
|
|
// Year | yyyy (4 digits) | yy (2 digits), y (2 or 4 digits)
|
|
// Month | MMM (name or abbr.)| MM (2 digits), M (1 or 2 digits)
|
|
// | NNN (abbr.) |
|
|
// Day of Month | dd (2 digits) | d (1 or 2 digits)
|
|
// Day of Week | EE (name) | E (abbr)
|
|
// Hour (1-12) | hh (2 digits) | h (1 or 2 digits)
|
|
// Hour (0-23) | HH (2 digits) | H (1 or 2 digits)
|
|
// Hour (0-11) | KK (2 digits) | K (1 or 2 digits)
|
|
// Hour (1-24) | kk (2 digits) | k (1 or 2 digits)
|
|
// Minute | mm (2 digits) | m (1 or 2 digits)
|
|
// Second | ss (2 digits) | s (1 or 2 digits)
|
|
// AM/PM | a |
|
|
//
|
|
// NOTE THE DIFFERENCE BETWEEN MM and mm! Month=MM, not mm!
|
|
// Examples:
|
|
// "MMM d, y" matches: January 01, 2000
|
|
// Dec 1, 1900
|
|
// Nov 20, 00
|
|
// "M/d/yy" matches: 01/20/00
|
|
// 9/2/00
|
|
// "MMM dd, yyyy hh:mm:ssa" matches: "January 01, 2000 12:30:45AM"
|
|
// ------------------------------------------------------------------
|
|
|
|
var MONTH_NAMES = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December', 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
|
|
var DAY_NAMES = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
|
|
function LZ(x) {
|
|
return (x < 0 || x > 9 ? "" : "0") + x;
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// isDate ( date_string, format_string )
|
|
// Returns true if date string matches format of format string and
|
|
// is a valid date. Else returns false.
|
|
// It is recommended that you trim whitespace around the value before
|
|
// passing it to this function, as whitespace is NOT ignored!
|
|
// ------------------------------------------------------------------
|
|
function isDate(val, format) {
|
|
var date = getDateFromFormat(val, format);
|
|
if (date === 0) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// -------------------------------------------------------------------
|
|
// compareDates(date1,date1format,date2,date2format)
|
|
// Compare two date strings to see which is greater.
|
|
// Returns:
|
|
// 1 if date1 is greater than date2
|
|
// 0 if date2 is greater than date1 of if they are the same
|
|
// -1 if either of the dates is in an invalid format
|
|
// -------------------------------------------------------------------
|
|
function compareDates(date1, dateformat1, date2, dateformat2) {
|
|
var d1 = getDateFromFormat(date1, dateformat1);
|
|
var d2 = getDateFromFormat(date2, dateformat2);
|
|
if (d1 === 0 || d2 === 0) {
|
|
return -1;
|
|
} else if (d1 > d2) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// formatDate (date_object, format)
|
|
// Returns a date in the output format specified.
|
|
// The format string uses the same abbreviations as in getDateFromFormat()
|
|
// ------------------------------------------------------------------
|
|
function formatDate(date, format) {
|
|
format = format + "";
|
|
var result = "";
|
|
var i_format = 0;
|
|
var c = "";
|
|
var token = "";
|
|
var y = date.getYear() + "";
|
|
var M = date.getMonth() + 1;
|
|
var d = date.getDate();
|
|
var E = date.getDay();
|
|
var H = date.getHours();
|
|
var m = date.getMinutes();
|
|
var s = date.getSeconds();
|
|
// Convert real date parts into formatted versions
|
|
var value = new Object();
|
|
if (y.length < 4) {
|
|
y = "" + (y - 0 + 1900);
|
|
}
|
|
value["y"] = "" + y;
|
|
value["yyyy"] = y;
|
|
value["yy"] = y.substring(2, 4);
|
|
value["M"] = M;
|
|
value["MM"] = LZ(M);
|
|
value["MMM"] = MONTH_NAMES[M - 1];
|
|
value["NNN"] = MONTH_NAMES[M + 11];
|
|
value["d"] = d;
|
|
value["dd"] = LZ(d);
|
|
value["E"] = DAY_NAMES[E + 7];
|
|
value["EE"] = DAY_NAMES[E];
|
|
value["H"] = H;
|
|
value["HH"] = LZ(H);
|
|
if (H === 0) {
|
|
value["h"] = 12;
|
|
} else if (H > 12) {
|
|
value["h"] = H - 12;
|
|
} else {
|
|
value["h"] = H;
|
|
}
|
|
value["hh"] = LZ(value["h"]);
|
|
if (H > 11) {
|
|
value["K"] = H - 12;
|
|
} else {
|
|
value["K"] = H;
|
|
}
|
|
value["k"] = H + 1;
|
|
value["KK"] = LZ(value["K"]);
|
|
value["kk"] = LZ(value["k"]);
|
|
if (H > 11) {
|
|
value["a"] = "PM";
|
|
} else {
|
|
value["a"] = "AM";
|
|
}
|
|
value["m"] = m;
|
|
value["mm"] = LZ(m);
|
|
value["s"] = s;
|
|
value["ss"] = LZ(s);
|
|
while (i_format < format.length) {
|
|
c = format.charAt(i_format);
|
|
token = "";
|
|
while ((format.charAt(i_format) == c) && (i_format < format.length)) {
|
|
token += format.charAt(i_format++);
|
|
}
|
|
if (value[token] !== null) {
|
|
result = result + value[token];
|
|
} else {
|
|
result = result + token;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// Utility functions for parsing in getDateFromFormat()
|
|
// ------------------------------------------------------------------
|
|
function _isInteger(val) {
|
|
var digits = "1234567890";
|
|
for (var i = 0; i < val.length; i++) {
|
|
if (digits.indexOf(val.charAt(i)) == -1) { return false; }
|
|
}
|
|
return true;
|
|
}
|
|
function _getInt(str, i, minlength, maxlength) {
|
|
for (var x = maxlength; x >= minlength; x--) {
|
|
var token = str.substring(i, i + x);
|
|
if (token.length < minlength) {
|
|
return null;
|
|
}
|
|
if (_isInteger(token)) {
|
|
return token;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// getDateFromFormat( date_string , format_string )
|
|
//
|
|
// This function takes a date string and a format string. It matches
|
|
// If the date string matches the format string, it returns the
|
|
// getTime() of the date. If it does not match, it returns 0.
|
|
// ------------------------------------------------------------------
|
|
function getDateFromFormat(val, format) {
|
|
val = val + "";
|
|
format = format + "";
|
|
var i_val = 0;
|
|
var i_format = 0;
|
|
var c = "";
|
|
var token = "";
|
|
var token2 = "";
|
|
var x, y;
|
|
var now = new Date();
|
|
var year = now.getYear();
|
|
var month = now.getMonth() + 1;
|
|
var date = 1;
|
|
var hh = now.getHours();
|
|
var mm = now.getMinutes();
|
|
var ss = now.getSeconds();
|
|
var ampm = "";
|
|
|
|
while (i_format < format.length) {
|
|
// Get next token from format string
|
|
c = format.charAt(i_format);
|
|
token = "";
|
|
while ((format.charAt(i_format) == c) && (i_format < format.length)) {
|
|
token += format.charAt(i_format++);
|
|
}
|
|
// Extract contents of value based on format token
|
|
if (token == "yyyy" || token == "yy" || token == "y") {
|
|
if (token == "yyyy") {
|
|
x = 4;
|
|
y = 4;
|
|
} else if (token == "yy") {
|
|
x = 2;
|
|
y = 2;
|
|
} else if (token == "y") {
|
|
x = 2;
|
|
y = 4;
|
|
}
|
|
year = _getInt(val, i_val, x, y);
|
|
if (year === null) {
|
|
return 0;
|
|
}
|
|
i_val += year.length;
|
|
if (year.length == 2) {
|
|
if (year > 70) {
|
|
year = 1900 + (year - 0);
|
|
} else {
|
|
year = 2000 + (year - 0);
|
|
}
|
|
}
|
|
} else if (token == "MMM" || token == "NNN") {
|
|
month = 0;
|
|
for (var i = 0; i < MONTH_NAMES.length; i++) {
|
|
var month_name = MONTH_NAMES[i];
|
|
if (val.substring(i_val, i_val + month_name.length).toLowerCase() == month_name.toLowerCase()) {
|
|
if (token == "MMM" || (token == "NNN" && i > 11)) {
|
|
month = i + 1;
|
|
if (month > 12) {
|
|
month -= 12;
|
|
}
|
|
i_val += month_name.length;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if ((month < 1) || (month > 12)) {
|
|
return 0;
|
|
}
|
|
} else if (token == "EE" || token == "E") {
|
|
for (var i = 0; i < DAY_NAMES.length; i++) {
|
|
var day_name = DAY_NAMES[i];
|
|
if (val.substring(i_val, i_val + day_name.length).toLowerCase() == day_name.toLowerCase()) {
|
|
i_val += day_name.length;
|
|
break;
|
|
}
|
|
}
|
|
} else if (token == "MM" || token == "M") {
|
|
month = _getInt(val, i_val, token.length, 2);
|
|
if (month === null || (month < 1) || (month > 12)) {
|
|
return 0;
|
|
}
|
|
i_val += month.length;
|
|
} else if (token == "dd" || token == "d") {
|
|
date = _getInt(val, i_val, token.length, 2);
|
|
if (date === null || (date < 1) || (date > 31)) {
|
|
return 0;
|
|
}
|
|
i_val += date.length;
|
|
} else if (token == "hh" || token == "h") {
|
|
hh = _getInt(val, i_val, token.length, 2);
|
|
if (hh === null || (hh < 1) || (hh > 12)) {
|
|
return 0;
|
|
}
|
|
i_val += hh.length;
|
|
} else if (token == "HH" || token == "H") {
|
|
hh = _getInt(val, i_val, token.length, 2);
|
|
if (hh === null || (hh < 0) || (hh > 23)) {
|
|
return 0;
|
|
}
|
|
i_val += hh.length;
|
|
} else if (token == "KK" || token == "K") {
|
|
hh = _getInt(val, i_val, token.length, 2);
|
|
if (hh === null || (hh < 0) || (hh > 11)) {
|
|
return 0;
|
|
}
|
|
i_val += hh.length;
|
|
} else if (token == "kk" || token == "k") {
|
|
hh = _getInt(val, i_val, token.length, 2);
|
|
if (hh === null || (hh < 1) || (hh > 24)) {
|
|
return 0;
|
|
}
|
|
i_val += hh.length;
|
|
hh--;
|
|
} else if (token == "mm" || token == "m") {
|
|
mm = _getInt(val, i_val, token.length, 2);
|
|
if (mm === null || (mm < 0) || (mm > 59)) {
|
|
return 0;
|
|
}
|
|
i_val += mm.length;
|
|
} else if (token == "ss" || token == "s") {
|
|
ss = _getInt(val, i_val, token.length, 2);
|
|
if (ss === null || (ss < 0) || (ss > 59)) {
|
|
return 0;
|
|
}
|
|
i_val += ss.length;
|
|
} else if (token == "a") {
|
|
if (val.substring(i_val, i_val + 2).toLowerCase() == "am") {
|
|
ampm = "AM";
|
|
} else if (val.substring(i_val, i_val + 2).toLowerCase() == "pm") {
|
|
ampm = "PM";
|
|
} else {
|
|
return 0;
|
|
}
|
|
i_val += 2;
|
|
} else {
|
|
if (val.substring(i_val, i_val + token.length) != token) {
|
|
return 0;
|
|
} else {
|
|
i_val += token.length;
|
|
}
|
|
}
|
|
}
|
|
// If there are any trailing characters left in the value, it doesn't match
|
|
if (i_val != val.length) {
|
|
return 0;
|
|
}
|
|
// Is date valid for month?
|
|
if (month == 2) {
|
|
// Check for leap year
|
|
if (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0)) { // leap year
|
|
if (date > 29) {
|
|
return 0;
|
|
}
|
|
} else {
|
|
if (date > 28) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
if ((month == 4) || (month == 6) || (month == 9) || (month == 11)) {
|
|
if (date > 30) {
|
|
return 0;
|
|
}
|
|
}
|
|
// Correct hours value
|
|
if (hh < 12 && ampm == "PM") {
|
|
hh = hh - 0 + 12;
|
|
} else if (hh > 11 && ampm == "AM") {
|
|
hh -= 12;
|
|
}
|
|
var newdate = new Date(year, month - 1, date, hh, mm, ss);
|
|
return newdate.getTime();
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// parseDate( date_string [, prefer_euro_format] )
|
|
//
|
|
// This function takes a date string and tries to match it to a
|
|
// number of possible date formats to get the value. It will try to
|
|
// match against the following international formats, in this order:
|
|
// y-M-d MMM d, y MMM d,y y-MMM-d d-MMM-y MMM d
|
|
// M/d/y M-d-y M.d.y MMM-d M/d M-d
|
|
// d/M/y d-M-y d.M.y d-MMM d/M d-M
|
|
// A second argument may be passed to instruct the method to search
|
|
// for formats like d/M/y (european format) before M/d/y (American).
|
|
// Returns a Date object or null if no patterns match.
|
|
// ------------------------------------------------------------------
|
|
function parseDate(val) {
|
|
var preferEuro = (arguments.length == 2) ? arguments[1] : false;
|
|
generalFormats = new Array('y-M-d', 'MMM d, y', 'MMM d,y', 'y-MMM-d', 'd-MMM-y', 'MMM d');
|
|
monthFirst = new Array('M/d/y', 'M-d-y', 'M.d.y', 'MMM-d', 'M/d', 'M-d');
|
|
dateFirst = new Array('d/M/y', 'd-M-y', 'd.M.y', 'd-MMM', 'd/M', 'd-M');
|
|
var checkList = new Array('generalFormats', preferEuro ? 'dateFirst' : 'monthFirst', preferEuro ? 'monthFirst' : 'dateFirst');
|
|
var d = null;
|
|
for (var i = 0; i < checkList.length; i++) {
|
|
var l = window[checkList[i]];
|
|
for (var j = 0; j < l.length; j++) {
|
|
d = getDateFromFormat(val, l[j]);
|
|
if (d !== 0) {
|
|
return new Date(d);
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
