/* 
This enhencement to Date object will return the date in your choosen format. Format parameters follows Python guidelines.

%a 	Locale’s abbreviated weekday name. 	 
%A 	Locale’s full weekday name. 	 
%b 	Locale’s abbreviated month name. 	 
%B 	Locale’s full month name. 	 
%d 	Day of the month as a decimal number [01,31]. 	 
%H 	Hour (24-hour clock) as a decimal number [00,23]. 	 
%I 	Hour (12-hour clock) as a decimal number [01,12]. 	 
%m 	Month as a decimal number [01,12]. 	 
%M 	Minute as a decimal number [00,59]. 	 
%S 	Second as a decimal number [00,61]. 	(3)
%y 	Year without century as a decimal number [00,99]. 	 
%Y 	Year with century as a decimal number. 	 
*/

Date.prototype.language = 'it';
Date.prototype.double_digit = true;
Date.prototype.week_days = { 
				'it' : [ 'domenica', 'lunedì', 'martedì', 'mercoledì', 'giovedì', 'venerdì', 'sabato' ],
			     	'en' : [ 'Sunday', 'Monday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' ] 
				};
Date.prototype.year_months = { 
				'it' : [ 'gennaio', 'febbraio', 'marzo', 'aprile', 'maggio', 'giugno', 'luglio', 'agosto', 'settembre', 'ottobre', 'novembre', 'dicembre' ],
				'en' : [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'Agoust', 'September', 'October', 'November', 'December' ] 
				};

Date.formatted = function ( format, date_str )
{
	if ( ! date_str ) date_str = null;
	var d = new Date ( date_str );
	if ( typeof ( d ) !== 'object' ) return '';
	return d.format_date ( format );
};

Date.prototype.format_date = function ( format )
{
	// find type of separator
	var dict = {
			'a' : '_get_day',
			'b' : '_get_month_name',
			'd' : '_get_date',
			'm' : '_get_month',
			'M' : '_get_minutes',
			'h' : '_time',
			'i' : '_time',
			'y' : '_get_year',
			's' : '_get_seconds'
			};
	var c, tmp, i, cback, is_fmt = false;
	var output = new String.buffer ();
	for ( c = 0; c < format.length ; c++ )
	{
		tmp = format [ c ];
		if ( tmp == '%' )
		{
			is_fmt = true;
			continue;
		}
		if ( is_fmt )
		{
			is_fmt = false;
			if ( dict.get ( tmp.toUpperCase () ) && dict.get ( tmp.toLowerCase() ) )
			{
				// if is defined in both , upper and lower case, than pick user choice
				cback = dict.get ( tmp );
			} else {
				// else we pass it as parameter
				cback = dict.get ( tmp.toLowerCase(), null );
			}
			if ( cback ) tmp = this [ cback ] ( tmp );
		}
		if ( tmp ) output.add ( tmp.toString () );
	}
	return output.toString ();
};

Date.prototype._get_day = function ( opt )
{
	var days = this.week_days [ this.language ];
	var js = this.getDay ();
	var out = days.get ( js, '' );
	if ( opt === 'a' ) out = out.substr ( 0, 3 );
	return out;
};

Date.prototype._get_month_name = function ( opt )
{
	var months = this.year_months [ this.language ];
	var js = this.getMonth ();
	var out = months.get ( js, '' );
	if ( opt === 'b' ) out = out.substr ( 0, 3 );
        return out; 
};

Date.prototype._time = function ( opt )
{
	var h = this.getHours ();
	if ( opt === 'i' && h > 12 ) h -= 12;
	return h;
};

Date.prototype._get_year = function ( opt )
{
	var out = this.getFullYear ().toString ();
	if ( opt === 'y' ) out = out.substr ( 2 );
        return out; 
};

Date.prototype._get_date = function ()
{
	var date = this.getDate ();
	return this.__double_digit ( date );
};

Date.prototype._get_month = function ()
{
	var month = this.getMonth () + 1;
	return this.__double_digit ( month );
};

Date.prototype._get_minutes = function ()
{
	var mins = this.getMinutes ();
	return this.__double_digit ( mins );
};

Date.prototype._get_seconds = function ()
{
	var secs = this.getSeconds ();
	return this.__double_digit ( secs );
};

Date.prototype.__double_digit = function ( val )
{
	val = parseInt ( val, 10 );	
	if ( this.double_digit && val < 10 ) val = '0' + val.toString ();
	return val;
};

Date.prototype.set_language = function ( lang )
{
	this.language = lang;
};

Date.prototype.add_language = function ( lang, days, months )
{
	this.week_days [ lang ] = days;
	this.year_months [ lang ] = months;
};