//REMOVES UNECESSARY MENU ITEMS

/*
baseMenuItem refers to the top menu item of the selected sub menu item.
Can possibly be the top menu item when it is selected
*/  
var baseMenuItem = document.getElementsByClassName('current_page_ancestor')[0];
//Runs when there is a parent(s) (or ancestor here) of the current selected menu item
if (baseMenuItem !== undefined){
    recursiveMenuParser(baseMenuItem);
}
/*
Else runs the finalCase to begin with, as then the selected menu item must be
on the top level of the menu.
*/
else {
    finalCase(document.getElementsByClassName('current_page_item')[0]);
}
/*
Parses the menu and deletes the children of menu items not within the branch of the
selected menu item
*/
function recursiveMenuParser (list) {
        //Active Menus holds the children of the current menu item to be parsed
        var activeMenus = list.getElementsByClassName('children')[0].children;
        //Temp holds the next parent menu item whos children have to be parsed
        var temp = null;
        //Iterates through each child
        for (var i = 0; i < activeMenus.length; i++){
            //Runs when the current menu item is hit
            if (activeMenus[i].className.includes('current_page_item')){
                finalCase(activeMenus[i]);
            }
            //Sets value equal to temp if it is an ancestor of the active page
            else if (activeMenus[i].className.includes('current_page_ancestor')){
                temp = activeMenus[i];
            }
            //If the current child is not an ancestor and has children, makes children invisible
            else {
                if (activeMenus[i].getElementsByClassName('children')[0] !== undefined){
                    var deleteMenu = activeMenus[i].getElementsByClassName('children')[0];
                    deleteMenu.style.display = "none";
                }
            }
        }
        //If the menu has not reached the depth of the current menu item, runs function recursivly again
        if (temp !== null) {
            return recursiveMenuParser(temp);
        }
    return 0;
}

//This makes one level of menu visible below the current selected menu item
function finalCase (list) {
    var activeMenuItem = list.getElementsByClassName('children')[0];
    if (activeMenuItem !== undefined) {
        //Sets the children of the active menu to activeMenuItemChildren
        var activeMenuItemChildren = activeMenuItem.children;
        //Iterates and makes the children of the children of the selected menu item invisible
        for (var i = 0; i < activeMenuItemChildren.length; i++){
            if (activeMenuItemChildren[i].getElementsByClassName('children')[0] !== undefined){
                var deleteMenu = activeMenuItemChildren[i].getElementsByClassName('children')[0];
                deleteMenu.style.display = "none";
            }
        }
    }
}