/*  Copyright Mihai Bazon, 2002, 2003  |  http://dynarch.com/mishoo/
 * ---------------------------------------------------------------------------
 *
 * The DHTML Calendar
 *
 * Details and latest version at:
 * http://dynarch.com/mishoo/calendar.epl
 *
 * This script is distributed under the GNU Lesser General Public License.
 * Read the entire license text here: http://www.gnu.org/licenses/lgpl.html
 *
 * This file defines helper functions for setting up the calendar.  They are
 * intended to help non-programmers get a working calendar on their site
 * quickly.  This script should not be seen as part of the calendar.  It just
 * shows you what one can do with the calendar, while in the same time
 * providing a quick and simple method for setting it up.  If you need
 * exhaustive customization of the calendar creation process feel free to
 * modify this code to suit your needs (this is recommended and much better
 * than modifying calendar.js itself).
 */

// $Id: calendar-setup.js,v 1.1.1.1 2005/03/23 01:23:40 bharrin1 Exp $

/**
 *  This function "patches" an input field (or other element) to use a calendar
 *  widget for date selection.
 *
 *  The "params" is a single object that can have the following properties:
 *
 *    prop. name   | description
 *  -------------------------------------------------------------------------------------------------
 *   inputField    | the ID of an input field to store the date
 *   displayArea   | the ID of a DIV or other element to show the date
 *   button        | ID of a button or other element that will trigger the calendar
 *   eventName     | event that will trigger the calendar, without the "on" prefix (default: "click")
 *   ifFormat      | date format that will be stored in the input field
 *   daFormat      | the date format that will be used to display the date in displayArea
 *   singleClick   | (true/false) wether the calendar is in single click mode or not (default: true)
 *   mondayFirst   | (true/false) if true Monday is the first day of week, Sunday otherwise (default: true)
 *   align         | alignment (default: "Bl"); if you don't know what's this see the calendar documentation
 *   range         | array with 2 elements.  Default: [1900, 2999] -- the range of years available
 *   weekNumbers   | (true/false) if it's true (default) the calendar will display week numbers
 *   flat          | null or element ID; if not null the calendar will be a flat calendar having the parent with the given ID
 *   flatCallback  | function that receives a JS Date object and returns an URL to point the browser to (for flat calendar)
 *   disableFunc   | function that receives a JS Date object and should return true if that date has to be disabled in the calendar
 *   onSelect      | function that gets called when a date is selected.  You don't _have_ to supply this (the default is generally okay)
 *   onClose       | function that gets called when the calendar is closed.  [default]
 *   onUpdate      | function that gets called after the date is updated in the input field.  Receives a reference to the calendar.
 *   date          | the date that the calendar will be initially displayed to
 *   showsTime     | default: false; if true the calendar will include a time selector
 *   timeFormat    | the time format; can be "12" or "24", default is "12"
 *
 *  None of them is required, they all have default values.  However, if you
 *  pass none of "inputField", "displayArea" or "button" you'll get a warning
 *  saying "nothing to setup".
 */
Calendar.setup = function (params) {
   function param_default(pname, def) { if (typeof params[pname] == "undefined") { params[pname] = def; } };

   param_default("inputField",     null);
   param_default("displayArea",    null);
   param_default("button",         null);
   param_default("eventName",      "click");
   param_default("ifFormat",       "%m/%d/%Y");
   param_default("daFormat",       "%Y/%m/%d");
   param_default("singleClick",    true);
   param_default("disableFunc",    null);
   param_default("dateStatusFunc", params["disableFunc"]);  // takes precedence if both are defined
   param_default("mondayFirst",    false);
   param_default("align",          "Bl");
   param_default("range",          [1990, 2020]);
   param_default("weekNumbers",    true);
   param_default("flat",           null);
   param_default("flatCallback",   null);
   param_default("onSelect",       null);
   param_default("onClose",        null);
   param_default("onUpdate",       null);
   param_default("date",           null);
   param_default("showsTime",      false);
   param_default("timeFormat",     "24");

   var tmp = ["inputField", "displayArea", "button"];
   for (var i in tmp) {
      if (typeof params[tmp[i]] == "string") {
         params[tmp[i]] = document.getElementById(params[tmp[i]]);
      }
   }
   if (!(params.flat || params.inputField || params.displayArea || params.button)) {
      alert("Calendar.setup:\n  Nothing to setup (no fields found).  Please check your code");
      return false;
   }

   function onSelect(cal) {
      if (cal.params.flat) {
         if (typeof cal.params.flatCallback == "function") {
            cal.params.flatCallback(cal);
         } else {
            alert("No flatCallback given -- doing nothing.");
         }
         return false;
      }
      if (cal.params.inputField) {
         cal.params.inputField.value = cal.date.print(cal.params.ifFormat);
      }
      if (cal.params.displayArea) {
         cal.params.displayArea.innerHTML = cal.date.print(cal.params.daFormat);
      }
      if (cal.params.singleClick && cal.dateClicked) {
         cal.callCloseHandler();
      }
      if (typeof cal.params.onUpdate == "function") {
         cal.params.onUpdate(cal);
      }
   };

   if (params.flat != null) {
      params.flat = document.getElementById(params.flat);
      if (!params.flat) {
         alert("Calendar.setup:\n  Flat specified but can't find parent.");
         return false;
      }
      var cal = new Calendar(params.mondayFirst, params.date, params.onSelect || onSelect);
      cal.showsTime = params.showsTime;
      cal.time24 = (params.timeFormat == "24");
      cal.params = params;
      cal.weekNumbers = params.weekNumbers;
      cal.setRange(params.range[0], params.range[1]);
      cal.setDateStatusHandler(params.dateStatusFunc);
      cal.create(params.flat);
      cal.show();
      return false;
   }

   var triggerEl = params.button || params.displayArea || params.inputField;
   triggerEl["on" + params.eventName] = function() {
      var dateEl = params.inputField || params.displayArea;
      var dateFmt = params.inputField ? params.ifFormat : params.daFormat;
      var mustCreate = false;
      var cal = window.calendar;
      if (!window.calendar) {
         window.calendar = cal = new Calendar(params.mondayFirst,
                          params.date,
                          params.onSelect || onSelect,
                          params.onClose || function(cal) { cal.hide(); });
         cal.showsTime = params.showsTime;
         cal.time24 = (params.timeFormat == "24");
         cal.weekNumbers = params.weekNumbers;
         mustCreate = true;
      } else {
         cal.hide();
      }
      cal.setRange(params.range[0], params.range[1]);
      cal.params = params;
      cal.setDateStatusHandler(params.dateStatusFunc);
      cal.setDateFormat(dateFmt);
      if (mustCreate) cal.create();
      if(dateEl.value || dateEl.innerHTML){
        var text = dateEl.value || dateEl.innerHTML;
        var RE = /\d/;
        if(RE.test(text)) cal.parseDate(dateEl.value || dateEl.innerHTML);
      }
                //
                //if(dateEl.value=='mm/dd/yyyy' || dateEl.innerHTML=='mm/dd/yyyy') cal.setDate(new Date());
      cal.refresh();
      cal.showAtElement(params.displayArea || params.inputField, params.align);
      return false;
   };
};

// used to turn on or off the use of earlier dates
function GreaterToday(date) {
  var today = new Date();
  //var days = ;
  return date - today<0;
  //return;
}