/************************************************************************************************************
Static folder tree
Copyright (C) October 2005  DTHMLGoodies.com, Alf Magne Kalleland

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

Dhtmlgoodies.com., hereby disclaims all copyright interest in this script
written by Alf Magne Kalleland.

Alf Magne Kalleland, 2006
Owner of DHTMLgoodies.com
	
************************************************************************************************************/	
	
/*
	Update log:
	December, 19th, 2005 - Version 1.1: Added support for several trees on a page(Alf Magne Kalleland)
	January,  25th, 2006 - Version 1.2: Added onclick event to text nodes.(Alf Magne Kalleland)
	February, 3rd 2006 - Dynamic load nodes by use of Ajax(Alf Magne Kalleland)
*/

	var idOfFolderTrees = ['dhtmlgoodies_tree'];
	
	var imageFolder = 'gui/';	// Path to images
	var folderImage = 'Folder.gif';
	var paragraphImage = 'Page.gif';
	var restrictedParagraphImage = 'paragraph_restricted.gif';
	var plusImage = 'dhtmlgoodies_plus.gif';
	var minusImage = 'dhtmlgoodies_minus.gif';
	var initExpandedNodes = '';	// Cookie - initially expanded nodes;
	var useAjaxToLoadNodesDynamically = true;
	var ajaxRequestFile = 'AjaxCatalogue.aspx';
	var contextMenuActive = true;	// Set to false if you don't want to be able to delete and add new nodes dynamically
	
	var ajaxObjectArray = new Array();
	var treeUlCounter = 0;
	var nodeId = 1;
	
	/*
	These cookie functions are downloaded from 
	http://www.mach5.com/support/analyzer/manual/html/General/CookiesJavaScript.htm
	*/
	function Get_Cookie(name) { 
	   var start = document.cookie.indexOf(name+"="); 
	   var len = start+name.length+1; 
	   if ((!start) && (name != document.cookie.substring(0,name.length))) return null; 
	   if (start == -1) return null; 
	   var end = document.cookie.indexOf(";",len); 
	   if (end == -1) end = document.cookie.length; 
	   return unescape(document.cookie.substring(len,end)); 
	} 
	// This function has been slightly modified
	function Set_Cookie(name,value,expires,path,domain,secure) { 
		expires = expires * 60*60*24*1000;
		var today = new Date();
		var expires_date = new Date( today.getTime() + (expires) );
	    var cookieString = name + "=" +escape(value) + 
	       ( (expires) ? ";expires=" + expires_date.toGMTString() : "") + 
	       ( (path) ? ";path=" + path : "") + 
	       ( (domain) ? ";domain=" + domain : "") + 
	       ( (secure) ? ";secure" : ""); 
	    document.cookie = cookieString; 
	} 
	
	function expandAll(treeId)
	{
		var menuItems = document.getElementById(treeId).getElementsByTagName('LI');
		for(var no=0;no<menuItems.length;no++){
			var subItems = menuItems[no].getElementsByTagName('UL');
			if(subItems.length>0 && subItems[0].style.display!='block'){
				showHideNode(false,menuItems[no].id.replace(/[^0-9]/g,''));
			}			
		}
	}
	
	function collapseAll(treeId)
	{
		var menuItems = document.getElementById(treeId).getElementsByTagName('LI');
		for(var no=0;no<menuItems.length;no++){
			var subItems = menuItems[no].getElementsByTagName('UL');
			if(subItems.length>0 && subItems[0].style.display=='block'){
				showHideNode(false,menuItems[no].id.replace(/[^0-9]/g,''));
			}			
		}	
	}

// We have data back from Ajax call.
// Process the response...
	function getNodeDataFromServer(ajaxIndex,ulId,parentId)
	{
		document.getElementById(ulId).innerHTML = ajaxObjectArray[ajaxIndex].response;
		ajaxObjectArray[ajaxIndex] = false;
		parseSubItems(ulId,parentId);
	}

	
// Parse the data from Ajax.
// This will consist of GCode | GroupName lines...
	function parseSubItems(ulId,parentId)
	{
		if(initExpandedNodes){
			var nodes = initExpandedNodes.split(',');
		}
		var branchObj = document.getElementById(ulId);
		var menuItems = branchObj.getElementsByTagName('LI');	// Get an array of all menu items
		for(var no=0;no<menuItems.length;no++){
			var imgs = menuItems[no].getElementsByTagName('IMG');
			if(imgs.length>0)continue;
			nodeId++;
			var subItems = menuItems[no].getElementsByTagName('UL');
			var img = document.createElement('IMG');
			img.src = imageFolder + plusImage;
			img.onclick = showHideNode;
			if(subItems.length==0)img.style.visibility='hidden';else{
				subItems[0].id = 'tree_ul_' + treeUlCounter;
				treeUlCounter++;
			}
			var aTag = menuItems[no].getElementsByTagName('A')[0];
			
			//if(contextMenuActive)aTag.oncontextmenu = showContextMenu;

							
			menuItems[no].insertBefore(img,aTag);
			menuItems[no].id = 'dhtmlgoodies_treeNode' + nodeId;
			var folderImg = document.createElement('IMG');
			
			if(menuItems[no].className){
				folderImg.src = imageFolder + menuItems[no].className;	
			}
			else{
				folderImg.src = imageFolder + folderImage;
				//njk aTag.onclick = showHideNode;
			}
			
			
			if ((menuItems[no].className != paragraphImage) && (menuItems[no].className != restrictedParagraphImage)){
				//njk aTag.onclick = showHideNode;
			}



			menuItems[no].insertBefore(folderImg,aTag);
			
			var tmpParentId = menuItems[no].getAttribute('parentId');
			if(!tmpParentId)tmpParentId = menuItems[no].tmpParentId;
			if(tmpParentId && nodes[tmpParentId])showHideNode(false,nodes[no]);	
		}		
	}
		

	
	function showHideNode(e,inputId)
	{
		if(inputId)
		{
			if(!document.getElementById('dhtmlgoodies_treeNode'+inputId))return;
			thisNode = document.getElementById('dhtmlgoodies_treeNode'+inputId).getElementsByTagName('IMG')[0]; 
		}
		else 
		{
			thisNode = this;
			if (this.tagName == 'A')
			{
				thisNode = this.parentNode.getElementsByTagName('IMG')[0];
			}
			
		}
		if (thisNode.style.visibility == 'hidden')
		{
			return;
		}
		var parentNode = thisNode.parentNode;
		inputId = parentNode.id.replace(/[^0-9]/g,'');
		if (thisNode.src.indexOf(plusImage) >= 0)
		{
			thisNode.src = thisNode.src.replace(plusImage,minusImage);
			var ul = parentNode.getElementsByTagName('UL')[0];
			ul.style.display = 'block';
			if (!initExpandedNodes)
			{
				initExpandedNodes = ',';
			}
			if (initExpandedNodes.indexOf(',' + inputId + ',') < 0)
			{
				initExpandedNodes = initExpandedNodes + inputId + ',';
			}
			
			if (useAjaxToLoadNodesDynamically)
			{
				// Using AJAX/XMLHTTP to get data from the server
				var firstLi = ul.getElementsByTagName('LI')[0];
				var parentId = firstLi.getAttribute('parentId');
				var itemId = firstLi.getAttribute('itemId');
				if(!parentId)parentId = firstLi.parentId;
				if(parentId){
					ajaxObjectArray[ajaxObjectArray.length] = new sack();
					var ajaxIndex = ajaxObjectArray.length-1;
					if (parentId == "0")
					{
						ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?LI=Yes';
					}
					else
					{
						ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?LI=Yes&CCode=' + parentId;
					}
					ajaxObjectArray[ajaxIndex].onCompletion = function() { getNodeDataFromServer(ajaxIndex,ul.id,parentId); };	// Specify function that will be executed after file has been found					
					ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
				}else if(itemId){
					/*ajaxObjectArray[ajaxObjectArray.length] = new sack();
					var ajaxIndex = ajaxObjectArray.length-1;
					ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?itemId=' + itemId;					
					ajaxObjectArray[ajaxIndex].onCompletion = function() { getItemDataFromServer(ajaxIndex,itemId); };	// Specify function that will be executed after file has been found					
					ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
				*/
				////alert("inside");
				}
							
			}
			
		}else{
			thisNode.src = thisNode.src.replace(minusImage,plusImage);
			parentNode.getElementsByTagName('UL')[0].style.display='none';
			initExpandedNodes = initExpandedNodes.replace(',' + inputId,'');
		}	
		Set_Cookie('dhtmlgoodies_expandedNodes',initExpandedNodes,500);
		
		return false;
	}
	

	var okToCreateSubNode = true;

	function addNewNode(e)
	{
		if (!okToCreateSubNode)
		{
			return;
		}
		setTimeout('okToCreateSubNode=true', 200);
		contextMenuObj.style.display = 'none';
		okToCreateSubNode = false;

		source = contextMenuSource;
		while (source.tagName.toLowerCase() != 'li')
		{
			source = source.parentNode;
		}
	
		/*
		if (e.target) source = e.target;
			else if (e.srcElement) source = e.srcElement;
			if (source.nodeType == 3) // defeat Safari bug
				source = source.parentNode; */
		//while(source.tagName.toLowerCase()!='li')source = source.parentNode;
		var nameOfNewNode = prompt('Name of new node');
		if (!nameOfNewNode)
		{
			return;
		}
		uls = source.getElementsByTagName('UL');
		if (uls.length == 0)
		{
			var ul = document.createElement('UL');
			source.appendChild(ul);
		}
		else
		{
			ul = uls[0];
			ul.style.display = 'block';
		}
		var img = source.getElementsByTagName('IMG');
		img[0].style.visibility = 'visible';
		var li = document.createElement('LI');
		li.className = 'dhtmlgoodies_sheet.gif';
		var a = document.createElement('A');
		a.href = '#';
		a.innerHTML = nameOfNewNode;
		li.appendChild(a);
		ul.id = 'newNode' + Math.round(Math.random() * 1000000);
		ul.appendChild(li);
		parseSubItems(ul.id);
		saveNewNode (nameOfNewNode, source.getElementsByTagName('A')[0].id);
	}
	
	/* Save a new node */
	function saveNewNode(nodeText,parentId)
	{
		self.status = 'Ready to save node ' + nodeText + ' which is a sub item of ' + parentId;
		// Use an ajax method here to save this new node. example below:
		/*
		ajaxObjectArray[ajaxObjectArray.length] = new sack();
		var ajaxIndex = ajaxObjectArray.length-1;
		ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?newNode=' + nodeText + '&parendId=' + parentId					
		ajaxObjectArray[ajaxIndex].onCompletion = function() { self.status = 'New node has been saved'; };	// Specify function that will be executed after file has been found					
		ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
		*/		
	}
	
	function deleteNode()
	{
		if(!okToCreateSubNode)return;		
		setTimeout('okToCreateSubNode=true',200);		
		contextMenuObj.style.display='none';
		source = contextMenuSource;
		
		if(!confirm('Click OK to delete the node ' + source.innerHTML))return;
		okToCreateSubNode = false;
		
		var parentLi = source.parentNode.parentNode.parentNode;
		while(source.tagName.toLowerCase()!='li')source = source.parentNode;		

		var lis = source.parentNode.getElementsByTagName('LI');
		source.parentNode.removeChild(source);
		if(lis.length==0)parentLi.getElementsByTagName('IMG')[0].style.visibility='hidden';
		deleteNodeOnServer(source.id);
	}
	
	function deleteNodeOnServer(nodeId)
	{
		self.status = 'Ready to delete node' + nodeId;
		// Use an ajax method here to save this new node. example below:
		/*
		ajaxObjectArray[ajaxObjectArray.length] = new sack();
		var ajaxIndex = ajaxObjectArray.length-1;
		ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?deleteNodeId=' + nodeId					
		ajaxObjectArray[ajaxIndex].onCompletion = function() { self.status = 'Node has been deleted successfully'; };	// Specify function that will be executed after file has been found					
		ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
		*/				
		
	}
	
	function initTree()
	{
		for(var treeCounter = 0; treeCounter < idOfFolderTrees.length; treeCounter++)
		{
			var dhtmlgoodies_tree = document.getElementById(idOfFolderTrees[treeCounter]);
			var menuItems = dhtmlgoodies_tree.getElementsByTagName('LI');	// Get an array of all menu items
			for (var no = 0; no < menuItems.length; no++)
			{					
				nodeId++;
				var subItems = menuItems[no].getElementsByTagName('UL');
				var img = document.createElement('IMG');
				img.src = imageFolder + plusImage;
				img.onclick = showHideNode;
				if (subItems.length == 0)
				{
					img.style.visibility = 'hidden';
				}
				else
				{
					subItems[0].id = 'tree_ul_' + treeUlCounter;
					treeUlCounter++;
				}
				var aTag = menuItems[no].getElementsByTagName('A')[0];
				//if(contextMenuActive)aTag.oncontextmenu = showContextMenu;

				aTag.onclick = showHideNode;
					// Disable this to make Cat Link fo directly to Catalogue.aspx

				menuItems[no].insertBefore(img,aTag);
				if (!menuItems[no].id)
				{
					menuItems[no].id = 'dhtmlgoodies_treeNode' + nodeId;
				}
				var folderImg = document.createElement('IMG');
				if(menuItems[no].className)
				{
					folderImg.src = imageFolder + menuItems[no].className;
					
				}
				else
				{
					folderImg.src = imageFolder + folderImage;
				}
				menuItems[no].insertBefore(folderImg, aTag);
			}	
		
		}
		//initExpandedNodes = Get_Cookie('dhtmlgoodies_expandedNodes');
		//if(initExpandedNodes){
		//	var nodes = initExpandedNodes.split(',');
		//	for(var no=0;no<nodes.length;no++){
		//		if(nodes[no])showHideNode(false,nodes[no]);	
		//	}			
		//}
		var subItems = menuItems[0].getElementsByTagName('UL');
		if(subItems[0].style.display != 'block')
		{
			showHideNode(false, menuItems[0].id.replace(/[^0-9]/g, ''));
		}			
	}
	
	window.onload = initTree;