// Title: Tigra Calendar
// URL: http://www.softcomplex.com/products/tigra_calendar/
// Version: 3.2 (European date format)
// Date: 10/14/2002 (mm/dd/yyyy)
// Feedback: feedback@softcomplex.com (specify product title in the subject)
// Note: Permission given to use this script in ANY kind of applications if
//    header lines are left unchanged.
// Note: Script consists of two files: calendar?.js and calendar.html
// About us: Our company provides offshore IT consulting services.
//    Contact us at sales@softcomplex.com if you have any programming task you
//    want to be handled by professionals. Our typical hourly rate is $20.

// if two digit year input dates after this year considered 20 century.
var NUM_CENTYEAR = 30;
// is time input control required by default
var BUL_TIMECOMPONENT = false;
// are year scrolling buttons required by default
var BUL_YEARSCROLL = true;
// are days before today disabled
var BUL_DISABLEPASTDAYS = false;
// date format 1 = DD-MM-YYYY   2 = YYYY-MM-DD  3 = MM-DD-YYYY
var BUL_DATEFORMAT = 'DD-MM-YYYY';

var ARR_WEEKDAYS=["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"];
var ARR_MONTHS = ["January", "February", "March", "April", "May", "June",
		"July", "August", "September", "October", "November", "December"];

var calendars = [];
var RE_NUM = /^\-?\d+$/;

var WindowTitle = '';

var ONLYFUTUREDATEMESSAGE = '';

function setTigraCalendarDateFormat(NewFormat) {
	BUL_DATEFORMAT = NewFormat;
}

function setTigraCalendarWeekdays(Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday) {
	ARR_WEEKDAYS = [Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday];
}

function setTigraCalendarMonths(m1,m2,m3,m4,m5,m6,m7,m8,m9,m10,m11,m12) {
	ARR_MONTHS = [m1,m2,m3,m4,m5,m6,m7,m8,m9,m10,m11,m12];
}

function setTigraCalendarWindowTitle(Title) {
	WindowTitle = Title;
}

function setTigraCalendarOnlyFutureDateMessage(Message) {
	ONLYFUTUREDATEMESSAGE = Message;
}

function calendar1(obj_target) {

	// assing methods
	this.gen_date = cal_gen_date1;
	this.gen_time = cal_gen_time1;
	this.gen_tsmp = cal_gen_tsmp1;
	this.prs_date = cal_prs_date1;
	this.prs_time = cal_prs_time1;
	this.prs_tsmp = cal_prs_tsmp1;
	this.popup    = cal_popup1;

	this.ARR_WEEKDAYS = ARR_WEEKDAYS;
	this.ARR_MONTHS = ARR_MONTHS;
	this.WindowTitle = WindowTitle;
	this.ONLYFUTUREDATEMESSAGE = ONLYFUTUREDATEMESSAGE;
	
	// validate input parameters
	if (!obj_target)
		return cal_error("Error calling the calendar: no target control specified");
	if (obj_target.value == null)
		return cal_error("Error calling the calendar: parameter specified is not valid tardet control");
	this.target = obj_target;
	this.time_comp = BUL_TIMECOMPONENT;
	this.year_scroll = BUL_YEARSCROLL;
	this.disable_past_days = BUL_DISABLEPASTDAYS;
	this.date_format = BUL_DATEFORMAT;
	this.caller_form = null;
	this.after_update_function = false;
	// register in global collections
	this.id = calendars.length;
	calendars[this.id] = this;
}

function cal_popup1 (str_datetime) {
	this.dt_current = this.prs_tsmp(str_datetime ? str_datetime : this.target.value);
	if (!this.dt_current) return;
	var obj_calwindow = oryginalWindowOpen(
		'calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,
		'Calendar', 'width=200,height='+(this.time_comp ? 215 : 190)+
		',status=no,resizable=no,top='+ (parseInt((screen.height - (this.time_comp ? 215 : 190))/2)) +',left='+ (parseInt((screen.width - 200)/2)) +',dependent=yes,alwaysRaised=yes'
	);
	obj_calwindow.opener = window;
	obj_calwindow.focus();
}

// timestamp generating function
function cal_gen_tsmp1 (dt_datetime) {
	return(this.gen_date(dt_datetime) + ' ' + this.gen_time(dt_datetime));
}

// date generating function
function cal_gen_date1 (dt_datetime) {
	if (this.date_format == 'DD-MM-YYYY') {
		return (
			(dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "-"
			+ (dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "-"
			+ dt_datetime.getFullYear()
		);
	}
	else if (this.date_format == 'YYYY-MM-DD') {
		return (
			dt_datetime.getFullYear() + "-"
			+ (dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "-"
			+ (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate()
		);
	}
	else if (this.date_format == 'MM-DD-YYYY') {
		return (
			(dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "-"
			+ (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "-"
			+ dt_datetime.getFullYear()
		);
	}
	return (
		dt_datetime.getFullYear() + "-"
		+ (dt_datetime.getMonth() < 10 ? '0' : '') + (dt_datetime.getMonth() + 1) + "-"
		+ (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate()
	);
}
// time generating function
function cal_gen_time1 (dt_datetime) {
	return (
		(dt_datetime.getHours() < 10 ? '0' : '') + dt_datetime.getHours() + ":"
		+ (dt_datetime.getMinutes() < 10 ? '0' : '') + (dt_datetime.getMinutes()) + ":"
		+ (dt_datetime.getSeconds() < 10 ? '0' : '') + (dt_datetime.getSeconds())
	);
}

// timestamp parsing function
function cal_prs_tsmp1 (str_datetime) {
	// if no parameter specified return current timestamp
	if (!str_datetime)
		return (new Date());

	// if positive integer treat as milliseconds from epoch
	if (RE_NUM.exec(str_datetime))
		return new Date(str_datetime);
		
	// else treat as date in string format
	var arr_datetime = str_datetime.split(' ');
	return this.prs_time(arr_datetime[1], this.prs_date(arr_datetime[0]));
}

// date parsing function
function cal_prs_date1 (str_date) {

	var arr_date = str_date.split('-');

	if (arr_date.length != 3) return cal_error ("Invalid date format: '" + str_date + "'.\nFormat accepted is dd-mm-yyyy.");
	if (!arr_date[0]) return cal_error ("Invalid date format: '" + str_date + "'.\nNo day of month value can be found.");
	if (!RE_NUM.exec(arr_date[0])) return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\nAllowed values are unsigned integers.");
	if (!arr_date[1]) return cal_error ("Invalid date format: '" + str_date + "'.\nNo month value can be found.");
	if (!RE_NUM.exec(arr_date[1])) return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed values are unsigned integers.");
	if (!arr_date[2]) return cal_error ("Invalid date format: '" + str_date + "'.\nNo year value can be found.");
	if (!RE_NUM.exec(arr_date[2])) return cal_error ("Invalid year value: '" + arr_date[2] + "'.\nAllowed values are unsigned integers.");
	var dt_date = new Date();
	dt_date.setDate(1);

	if (this.date_format == 'DD-MM-YYYY') {
		day = arr_date[0];
		month = arr_date[1];
		year = arr_date[2];
	}
	else if (this.date_format == 'YYYY-MM-DD') {
		day = arr_date[2];
		month = arr_date[1];
		year = arr_date[0];
	}
	else if (this.date_format == 'MM-DD-YYYY') {
		day = arr_date[1];
		month = arr_date[0];
		year = arr_date[2];
	}
	
	if (month < 1 || month > 12) return cal_error ("Invalid month value: '" + month + "'.\nAllowed range is 01-12.");
	dt_date.setMonth(month-1);
	 
	if (year < 100) year = Number(year) + (year < NUM_CENTYEAR ? 2000 : 1900);
	dt_date.setFullYear(year);

	var dt_numdays = new Date(year, month, 0);
	dt_date.setDate(day);
	if (dt_date.getMonth() != (month-1)) return cal_error ("Invalid day of month value: '" + day + "'.\nAllowed range is 01-"+dt_numdays.getDate()+".");

	return (dt_date)
}

// time parsing function
function cal_prs_time1 (str_time, dt_date) {

	if (!dt_date) return null;
	var arr_time = String(str_time ? str_time : '').split(':');

	if (!arr_time[0]) dt_date.setHours(0);
	else if (RE_NUM.exec(arr_time[0])) 
		if (arr_time[0] < 24) dt_date.setHours(arr_time[0]);
		else return cal_error ("Invalid hours value: '" + arr_time[0] + "'.\nAllowed range is 00-23.");
	else return cal_error ("Invalid hours value: '" + arr_time[0] + "'.\nAllowed values are unsigned integers.");
	
	if (!arr_time[1]) dt_date.setMinutes(0);
	else if (RE_NUM.exec(arr_time[1]))
		if (arr_time[1] < 60) dt_date.setMinutes(arr_time[1]);
		else return cal_error ("Invalid minutes value: '" + arr_time[1] + "'.\nAllowed range is 00-59.");
	else return cal_error ("Invalid minutes value: '" + arr_time[1] + "'.\nAllowed values are unsigned integers.");

	if (!arr_time[2]) dt_date.setSeconds(0);
	else if (RE_NUM.exec(arr_time[2]))
		if (arr_time[2] < 60) dt_date.setSeconds(arr_time[2]);
		else return cal_error ("Invalid seconds value: '" + arr_time[2] + "'.\nAllowed range is 00-59.");
	else return cal_error ("Invalid seconds value: '" + arr_time[2] + "'.\nAllowed values are unsigned integers.");

	dt_date.setMilliseconds(0);
	return dt_date;
}

function cal_error (str_message) {
	alert (str_message);
	return null;
}