/*  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 1.7 2003/11/03 05:54:09 mishoo 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",       "%Y-%m-%d %H:%M");
 param_default("daFormat",       "%a, %b %d, %Y");
 param_default("singleClick",    true);
 param_default("disableFunc",    null);
 param_default("dateStatusFunc", params["disableFunc"]); // takes precedence if both are defined
 param_default("mondayFirst",    true);
 param_default("align",          "TR");
 param_default("range",          [1960, 2015]);
 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",      true);
 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();
  cal.parseDate(dateEl.value || dateEl.innerHTML);
  cal.refresh();
  cal.showAtElement(params.displayArea || params.inputField,"Br");
  //cal.showAtElement(params.displayArea || params.inputField, params.align);
  return false;
 };
};