Prototype ¬ Detail

author: frog [+], Submitted: 10.16.03 3p • Last Edit: 10.16.03 3p

/*

Date.getFormatted() prototype 

by Peter Y. Sobolev 
http://www.enlight.ru/frog
email: frog@enlight.ru

Returns formatted date (string) using JavaSimpleDateFormat (format)

Unsupported features (in compare with JavaSimpleDateFormat):

 w  Week in year  Number  27
 W  Week in month  Number  2
 'any_letters'

Extensions:

 A (AM/PM with big chars), U (unix time), L (leap year flag)

*/

// =================== some utility functions =====================

String.prototype.isCharLatinAt = function (i)
{
if (
	(this.charCodeAt(i)>=65 and
	this.charCodeAt(i)<=90) or
	(this.charCodeAt(i)>=97 and
	this.charCodeAt(i)<=122) 
   ) return true; else return false;
}//isCharLatinAt

// Complete number (string) up to n digits (with zeroes)
String.prototype.LeadingZero = function (n)
{
var z;

for (var k=0;k<(n-this.length);k++) z+="0";
return (z+this);
}//LeadingZero


// Is this year leap? (true or false)

Date.prototype.isLeapYear = function()
{
var y = this.getFullYear();
return (y%4 ==0) && !((y%100 == 0) && (y%400 !=0));
}//isLeapYear



// ================= MAIN PROTOTYPE =====================


Date.prototype.getFormatted = function(format)
{
//trace("=========="+format+"/"+this);

var formatd = Array();
var stmp,sout;


dayS = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
dayF = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
monthS = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
monthF = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];


// Split format string by groups
stmp = "";
for(i=0;i<format.length;i++)
{
	stmp+=format.charAt(i);
	if (format.charAt(i)!=format.charAt(i+1))
	{
		formatd.push(stmp);
                stmp = "";
	}//if

}//for

// Analyze each group

for(i=0;i<formatd.length;i++)
{
// pass non-format chars directly to output string
	if (not formatd[i].isCharLatinAt(0)) sout+=formatd[i];
// replace format chars with date/time 
	else
		switch(formatd[i].charAt(0))
		{

// G  Era designator  Text  AD
		case 'G' :
			sout += "AD"; // ?
		break;

// y  Year  Year  1996; 96
		case 'y' :
	                if (formatd[i].length>=4)
				sout+=this.getFullYear().toString().leadingZero(formatd[i].length); // full form
			else
				sout+=string(this.getFullYear()).substr(this.getFullYear().length-2,2); // short form
		break;

// L  Leap Year flag (0,1)
		case 'L':
                	sout += this.isLeapYear() ? 1 : 0;
                break;

// M  Month in year  Month  July; Jul; 07
		case 'M' :
	                if (formatd[i].length<=2) sout+=(this.getMonth()+1).toString().leadingZero(formatd[i].length); // 1 or 2 digits
      	                if (formatd[i].length==3) sout+=monthS[this.getMonth()]; 
      	                if (formatd[i].length>3) sout+=monthF[this.getMonth()];
		break;

// w  Week in year  Number  27
		case 'w' : break;

// W  Week in month  Number  2
		case 'W' : break;

// D  Day in year  Number  189
		case 'D' :
			var dy = this.getFullYear();
			var dd = new Date(this.getTime());
			stmp = -1;
			while (dd.getFullYear() == dy)
			{
				dd.setDate(dd.getDate()-1);
				stmp++;
			}//while
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// d  Day in month  Number  10
		case 'd' :
			stmp = this.getDate();
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// F  Day of week in month  Number  2
		case 'F' :
			stmp = this.getDay();
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// E  Day in week  Text  Tuesday; Tue
		case 'E' :
      	                
      	                if (formatd[i].length>3) sout+=dayF[this.getDay()];
      	                else sout+=dayS[this.getDay()]; 
		break;

// a  Am/pm marker  Text  pm
		case 'a' :
			sout += (this.getHours() < 12) ? "am" : "pm";
		break;

// A  Am/pm marker  Text  PM <- my extension to the JavaSimpleDateDataFormat
		case 'A' :
			sout += (this.getHours() < 12) ? "AM" : "PM";
		break;

// H  Hour in day (0-23)  Number  0
		case 'H' :
			stmp = this.getHours();
			stmp = stmp.toString().LeadingZero(formatd[i].length);
			sout += stmp;
		break;

// k  Hour in day (1-24)  Number  24
		case 'k' :
			stmp = (this.getHours()==0) ? "24" : this.getHours();
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// K  Hour in am/pm (0-11)  Number  0
		case 'K' :
			stmp = this.getHours()%12;
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// h  Hour in am/pm (1-12)  Number  12
		case 'h' :
			stmp = (this.getHours()%12 == 0)  ? "12" : this.getHours()%12;
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// m  Minute in hour  Number  30
		case 'm' :
			stmp = this.getMinutes();
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// s  Second in minute  Number  55
		case 's' :
			stmp = this.getSeconds();
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// S  Millisecond  Number  978
		case 'S' :
			stmp = this.getMilliseconds();
			sout += stmp.toString().LeadingZero(formatd[i].length);
		break;

// U  seconds since the Unix Epoch (January 1 1970 00:00:00 GMT) <- my extension to the JavaSimpleDateDataFormat
		case 'U' :
			sout += this.getTime();
		break;

// z  Time zone  General time zone  Pacific Standard Time; PST; GMT-08:00
		case 'z' : // this part of code was done by Charlie Cordova
			var off = this.getTimezoneOffset();
			var pos = off<=0; //in Flash, offsets are positive west of GMT
			var mins = (Math.abs(off%60)).toString();
			if (mins.length == 1) mins = "0" + mins;
			var hours = Math.floor(Math.abs(off/60)).toString();
			if (hours.length == 1) hours = "0" + hours;
			
			sout += "GMT" + (pos ? "+" : "-") + hours + ":" + mins;

		break;

// Z  Time zone  RFC 822 time zone  -0800
		case 'Z' :
			sout += this.getTimezoneOffset() * (-60);
		break;
}//switch

}//for

// trace(sout);

return sout;
}//Date.getFormatted

usage

// How to use Date.getFormatted() prototype...

#include "date_getformatted.as"

current_datetime = new Date(); // get current datetime
sample_datetime = new Date(1066227645124); // unixtime sample to Flash Date() datetime

// datetime in Flash Date() format to formatted string:
trace(current_datetime.getFormatted("dd.MM.yy HH:mm:ss"));
trace(sample_datetime.getFormatted("dd.MM.yy")); //15.10.03
trace(sample_datetime.getFormatted("yyyy.MMMMM.dd GGG hh:mm aaa")); //2003.October.15 AD 06:20 pm
trace(sample_datetime.getFormatted("K:mm a,z")); //6:20 pm,GMT+04:00
trace(sample_datetime.getFormatted("H:mm:ss:SSS")); //18:20:45:124
trace(sample_datetime.getFormatted("yyyy.MM.dd G hh:mm:ss")); //2003.10.15 AD 06:20:45 GMT+04:00
trace(sample_datetime.getFormatted("M yy d E H s")); //10 03 15 Wed 18 45
trace(sample_datetime.getFormatted("MM yyyy dd EEEE HH ss")); //10 2003 15 Wednesday 18 45
trace(sample_datetime.getFormatted("MMM a")); //Oct 
trace(sample_datetime.getFormatted("MMMM A")); //October
trace(sample_datetime.getFormatted("E, dd MMM yyyy HH:mm:ss Z")); //Wed, 15 Oct 2003 18:20:45 14400
trace(sample_datetime.getFormatted("U")); //1066227645124
trace(sample_datetime.getFormatted("yyyy L")); //2003 0