/**
*    Chained Selects for jQuery 
*    Copyright (C) 2008 Ziadin Givan www.CodeAssembly.com  
*
*    This program is free software: you can redistribute it and/or modify
*    it under the terms of the GNU General Public License as published by
*    the Free Software Foundation, either version 3 of the License, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU General Public License for more details.
*
*    You should have received a copy of the GNU General Public License
*    along with this program.  If not, see http://www.gnu.org/licenses/
*
*    
*   settings = { usePost : true, before:function() {}, after: function() {}, default: null, parameters : { parameter1 : 'value1', parameter2 : 'value2'} }	
*   if usePost is true, then the form will use POST to pass the parameters to the target, otherwise will use GET
*   "before" function is called before the ajax request and "after" function is called after the ajax request.
*   If defaultValue is not null then the specified option will be selected.
*   You can specify additional parameters to be sent to the the server in settings.parameters.
*
*/

function chain_select(si_product, target, attr, row_number, quantity)
{
	$('#gmail_loading').show();

		settings = jQuery.extend(
		{
			after : null,
			before : null,
			usePost : false,
			defaultValue : null,
			parameters : {'_id' : $(this).attr('id'), '_name' : $(this).attr('name')}
        });

	$.ajax({
		type: 'GET',
		url: './index.php?module=invoices&view=ajax&search='+attr,
		data: "_value="+si_product,
		success: function(data){
			$('#gmail_loading').hide();
			/*$('#state').html(data);*/
			/*if ( (quantity.length==0) || (quantity.value==null) ) */
		settings = jQuery.extend(
		{
			after : null,
			before : null,
			usePost : false,
			defaultValue : null,
			parameters : {'_id' : $(this).attr('id'), '_name' : $(this).attr('name')}
        } , settings);

		settings.parameters._value =  $(this).val();

			$(target).html("");//clear old options
			data = eval(data);//get json array
			for (i = 0; i < data.length; i++)//iterate over all options
			{
			  for ( key in data[i] )//get key => value
			  {	
					$(target).get(0).add(new Option(data[i][key],[key]), document.all ? i : null);
              }
			}

				$("option:first", target).attr( "selected", "selected" );//select first option

			if (settings.after != null) 
			{
				settings.after(target);
			}

			if (quantity=="") 
			{	
				$("#quantity"+row_number).attr("value","1");
			}
			$("#attr1"+row_number).attr("value",data);
			$(target).removeAttr('disabled');
		}
	});
}
jQuery.fn.chainSelect = function( target, url, settings ) 
{
  return this.each( function()
  {
	$(this).change( function( ) 
	{
		settings = jQuery.extend(
		{
			after : null,
			before : null,
			usePost : false,
			defaultValue : null,
			parameters : {'_id' : $(this).attr('id'), '_name' : $(this).attr('name')}
        } , settings);

		settings.parameters._value =  $(this).val();

		if (settings.before != null) 
		{
			settings.before( target );
		}

		ajaxCallback = function(data, textStatus) 
		{
			$(target).html("");//clear old options
			data = eval(data);//get json array
			for (i = 0; i < data.length; i++)//iterate over all options
			{
			  for ( key in data[i] )//get key => value
			  {	
					$(target).get(0).add(new Option(data[i][key],[key]), document.all ? i : null);
              }
			}

			if (settings.defaultValue != null)
			{
				$(target).val(settings.defaultValue);//select default value
			} else
			{
				$("option:first", target).attr( "selected", "selected" );//select first option
			}

			if (settings.after != null) 
			{
				settings.after(target);
			}

			$(target).change();//call next chain
			$(target).removeAttr('disabled');

		};

		if (settings.usePost == true)
		{
			$.post( url, settings.parameters, ajaxCallback );
		} else
		{
			$.get( url, settings.parameters, ajaxCallback );
		}
	});
  });
};
