// 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;

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

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;

   // 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.language = "en";
   
   // 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 = window.open(
      '/cal/calendar.php?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id+ '&lng=' + this.language,
      'Calendar', 'width=200,height='+(this.time_comp ? 215 : 190)+
      ',status=no,resizable=no,top=200,left=200,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) {
   return (
      (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "."
      + (dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "."
      + dt_datetime.getFullYear()
   );
}
// 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 (arr_date[1] < 1 || arr_date[1] > 12) return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed range is 01-12.");
   dt_date.setMonth(arr_date[1]-1);
    
   if (arr_date[2] < 100) arr_date[2] = Number(arr_date[2]) + (arr_date[2] < NUM_CENTYEAR ? 2000 : 1900);
   dt_date.setFullYear(arr_date[2]);

   var dt_numdays = new Date(arr_date[2], arr_date[1], 0);
   dt_date.setDate(arr_date[0]);
   if (dt_date.getMonth() != (arr_date[1]-1)) return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\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;
}
