/************************************************************************************************************
    (C) www.dhtmlgoodies.com, October 2005

    Update log:
    December, 19th, 2005 - Version 1.1: Added support for several trees on a page
    January,  25th, 2006 - Version 1.2: Added onclick event to text nodes.
    February, 3rd 2006 - Dynamic load nodes by use of Ajax


    This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.

    Terms of use:
    You are free to use this script as long as the copyright message is kept intact. However, you may not
    redistribute, sell or repost it without our permission.

    Thank you!

    www.dhtmlgoodies.com
    Alf Magne Kalleland

    ************************************************************************************************************/

//// SETTINGS
    var idOfFolderTrees = new Array();
    var imageFolder = 'swiz/folder-tree-static/images/';    // Path to images
    //var folderImage = 'empty.gif';
    var folderImage = '';
    var plusImage = 'plus.gif';
    var minusImage = 'minus.gif';
    var nodeShowsHides = false;


    var initExpandedNodes = '';    // Cookie - initially expanded nodes;
    var useAjaxToLoadNodesDynamically = false;
    var ajaxRequestFile = 'writeNodes.php';
    var contextMenuActive = false;    // 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, ''));
            }
        }
        return false;
    }

    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,''));
            }
        }
        return false;
    }

    function getNodeDataFromServer(ajaxIndex, ulId, parentId) {
        document.getElementById(ulId).innerHTML = ajaxObjectArray[ajaxIndex].response;
        ajaxObjectArray[ajaxIndex] = false;
        parseSubItems(ulId, parentId);
    }

    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;
            img.className = "plus-minus";
            if (subItems.ength == 0) {
                img.style.visibility = 'hidden';
            } else {
                subItems[0].id = 'tree_ul_' + treeUlCounter;
                treeUlCounter++;
            }
            var aTag = menuItems[no].getElementsByTagName('A')[0];
            if (nodeShowsHides) {
                aTag.onclick = showHideNode;
            }
            if (contextMenuActive) {
                aTag.oncontextmenu = showContextMenu;
            }

            menuItems[no].insertBefore(img, aTag);
            menuItems[no].id = 'dhtmlgoodies_treeNode' + nodeId;
            if (menuItems[no].className || folderImage) {
                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);
            }

            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 (e === true) {
            thisNode = inputId.parentNode.getElementsByTagName('IMG')[0];
        } else 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');
                if (!parentId) {
                    parentId = firstLi.parentId;
                }
                if (parentId) {
                    ajaxObjectArray[ajaxObjectArray.length] = new sack();
                    var ajaxIndex = ajaxObjectArray.length - 1;
                    ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?parentId=' + parentId;
                    ajaxObjectArray[ajaxIndex].onCompletion = function() {
                        // Specify function that will be executed after file has been found
                        getNodeDataFromServer(ajaxIndex, ul.id, parentId);
                    };
                    ajaxObjectArray[ajaxIndex].runAJAX();        // Execute AJAX function
                }
            }
        } 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;
    }

    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
            var firstUl = dhtmlgoodies_tree.getElementsByTagName('UL')[0];
            firstUl.id = 'tree_ul_' + treeUlCounter++;
            firstUl.style.display = "block";
            var menuItems = firstUl.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;
                img.className = "plus-minus";
                if (subItems.length == 0
                        || subItems[0].getElementsByTagName('LI').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;
                }
                if (nodeShowsHides) {
                    aTag.onclick = showHideNode;
                }
                menuItems[no].insertBefore(img, aTag);
                if (!menuItems[no].id) {
                    menuItems[no].id = 'dhtmlgoodies_treeNode' + nodeId;
                }
                if (menuItems[no].className || folderImage) {
                    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]);
                }
            }
        }
    }