Is there a way to test a node to see if it is the current page? I thought it would have been something like:

item.Model ? "class=active" : null; 

this doesn't work so I was experiementing with item.IsDescendantOrSelf(Model), but of course this will assign the class to all the children of the current page. What can I do to only select the current node? Here is my navigation:

@{
var page = Model.AncestorOrSelf(3).Children;

<ul>
@foreach (var subPage in page) {
      var style = subPage.IsDescendantOrSelf(Model) ? "class=active" : "";
      var targetParent = subPage.externalUrl ? "target=_blank" : "";
      var linkParent = subPage.HasValue("externalUrl") ? subPage.url : subPage.Url;
      <li @style ><a href="@linkParent" @targetParent>@subPage.Name</a>

@if(subPage.Children.Any() && subPage.IsAncestorOrSelf(Model)){ 
    <ul class="academics-items">
        @foreach (var item in subPage.Children.Where("Visible")) {
    var childActive = item.IsDescendantOrSelf(Model) ? "class=activeChild" : "";
    var target = item.externalUrl ? "target=_blank" : "";
    var link = item.HasValue("externalUrl") ? item.url : item.Url;
        <li @childActive ><a href="@link" @target>@item.Name</a>

@if(item.Children.Any() && item.IsAncestorOrSelf(Model)){ 
    <ul class="academics-items">
        @foreach (var child in item.Children.Where("Visible")) {
    var subChildActive = child.IsDescendantOrSelf(Model) ? "class=subActive" : "";
    var subTarget = child.externalUrl ? "target=_blank" : "";
    var subLink = child.HasValue("externalUrl") ? child.url : child.Url;
        <li @subChildActive ><a href="@subLink" @subTarget>@child.Name</a>

@if(child.Children.Any() && child.IsAncestorOrSelf(Model)){ 
    <ul class="academics-items">
        @foreach (var lastChild in child.Children.Where("Visible")) {
    var lastChildActive = lastChild.IsDescendantOrSelf(Model) ? "class=lastActive" : "";
    var lastChildTarget = lastChild.externalUrl ? "target=_blank" : "";
    var lastChildLink = lastChild.HasValue("externalUrl") ? lastChild.url : lastChild.Url;
        <li @lastChildActive ><a href="@lastChildLink" @lastChildTarget>@lastChild.Name</a></li>
        }
    </ul>
            }
            </li>
        }
                    </ul>
                }

        </li>
        }
    </ul>
   } 
    </li>