/**
 * $file: NamePicker.js $
 * $Revision: 1.001 $
 * $Date: 2006/06/23 $
 *
 * @author Jake Howlett, codestore.net
 * @copyright Copyright \u00A9 2006, Rockall Design ltd, All rights reserved.
 */
 
var NamePicker = {
	target_field: "",
	target_type: "",
	remember_last: false,
	prompt:  'Type the name of the person you are looking for and then click their name to add to it.',
	
	init: function(settings){
		NamePicker.settings = settings;
		$("search_results").appendChild(Builder.node('p', this.prompt));
		new Form.Element.Observer('search_text', 1, this.lookup);
	},

	reset: function (){
		Element.hide('search_spinner');
		$("search_text").value="";
		$("search_results").replaceChild(Builder.node('p', this.prompt), $("search_results").firstChild);
		
	},
	
	open: function(caller, field, type, prompt){
		if (!this.RememberLast)
			this.reset();
	
		this.target_field = field;
		this.target_type = type;

		$('NamesPickerLabel').replaceChild(Builder.node('strong',prompt),$('NamesPickerLabel').firstChild);
		Element.setStyle('NamesPicker', {position: 'absolute', top: this.findPosY(caller)+"px", left: this.findPosX(caller)+"px"} );
		
		new Effect.SlideDown('NamesPicker');
	},

	close: function(){
		new Effect.SlideUp('NamesPicker');
	},

	add: function(name){
		switch (this.target_type){
			case "single":
				$(this.target_field).value = name;
				new Effect.Highlight(this.target_field, { queue: 'front' }); //'Message');
				this.close();
			break;
			
			case "multi":
				$(this.target_field).value+=name+'\n';
			break;
			
			case "table":
			  	//build the row
				tr = Builder.node('tr', [
							Builder.node('td', [name, Builder.node('input', {'type':'hidden', 'name':this.target_field, 'value':name})]),
							Builder.node('td', [Builder.node('img', {'alt':'remove','title':'Remove '+name, 'src':'images/icons/remove.gif',
														'onclick':'NamePicker.remove(this.parentNode.parentNode)'})])
						]
				);
				$(this.target_field+'-List').appendChild(tr);

			break;
			
		}
	},

	lookup: function(element, value) {
		if (value=="") return;
			new Ajax.Request(
      		  NamePicker.settings['addressbook']+'/'+NamePicker.settings['viewname']+'?readviewentries&count=10',
         			{asynchronous:true, evalScripts:true, 
           			onSuccess:NamePicker.list_results, 
           			onLoading:function(request)
            				{Element.show('search_spinner')},
  		        	 	method:'get', parameters:{'startkey':value, 'OutputFormat':NamePicker.settings["OutputFormat"]}
				}
		)
	},

	list_results: function (response){
		
		list = Builder.node('ul', {className:'names'});
		
		if (NamePicker.settings["OutputFormat"]=="JSON"){	
		
			var root = eval("("+response.responseText+")");
			root.viewentry.each( function(entry){
					list.appendChild(Builder.node('li', {onclick:'NamePicker.add(this.innerHTML)'},
						[entry.entrydata[NamePicker.settings['column']-1].text['0']]));
				}
			) //end each
			
		} else { //must be XML in that case
			var root = response.responseXML;
			entries=root.getElementsByTagName("viewentry");
			for (var i=0; i<entries.length; ++i){
				list.appendChild(Builder.node('li',{'onclick':'NamePicker.add(this.innerHTML)'},
						[entries[i].getElementsByTagName("text").item(NamePicker.settings["column"]-1).firstChild.nodeValue]));
			}
		}
		
		$('search_results').replaceChild(list, $('search_results').firstChild);
		
		Element.hide('search_spinner');
	},

	remove: function (row){
		Element.remove(row);
	},
	
	findPosX: function(obj) 
	{	
		var curleft = 0;
		if (obj.offsetParent)
		{
			while (obj.offsetParent)
			{
				curleft += obj.offsetLeft
				obj = obj.offsetParent;
			}
		}
		else if (obj.x)
			curleft += obj.x;
		
		return curleft;
	},

	findPosY: function(obj)
	{
		var curtop = 0;
		if (obj.offsetParent)
		{
			while (obj.offsetParent)
			{
				curtop += obj.offsetTop
				obj = obj.offsetParent;
			}
		}
		else if (obj.y)
			curtop += obj.y;
			
		return curtop;
	}
}