add level

addlevel.js

 vm.recursiveSearch = function find(source, id, currentLevel) {
            for (var key in source) {
                if (source.hasOwnProperty(key)) {
                    source[key].level = currentLevel;
                    var item = source[key];
                    vm.kk.push(item);
                    if (item.nodeId === id) {
                        return item;
                    }
                    if (item.childNode) {
                        var subresult = vm.recursiveSearch(item.childNode, id, currentLevel + 1);
                        if (subresult) {
                            return subresult;
                        }
                    }
                }
            }
            return null;
        };

http://www.codeproject.com/Questions/1074776/Finding-level-of-any-node-parameter-object-in-give