SilverStripe Prev / Next Controls

silverstripe-prev-next.php

public function PrevNextPage($Mode = 'next') {

	if($Mode == 'next'){
      		return SiteTree::get()->filter(array("ParentID" => $this->ParentID, "Sort:GreaterThan" => $this->Sort))->sort("Sort ASC")->limit(1)->first();
	}
	elseif($Mode == 'prev'){
      		return SiteTree::get()->filter(array("ParentID" => $this->ParentID, "Sort:LessThan" => $this->Sort))->sort("Sort DESC")->limit(1)->first();
	}
	else{
		return false;
	}

}

Is it possible to amend this so that IF you are on the last page that instead of returning false and therefor no link it takes you back to the first page (looping essentially)?

@pinkp
To avoid the "Previous" button on the first page a and "Next" at the last:

<% if Parent && $ChildrenOf($Parent.URLSegment).count > 1 %> <div> <% if $Sort > 1 %> <% loop PrevNextPage(prev) %> <a href="$Link">&lt; Previouse</a> <% end_loop %> <% end_if %> <% if $Sort < $ChildrenOf($Parent.URLSegment).count %> <% loop PrevNextPage(next) %> <a href="$Link">Next &gt; </a> <% end_loop %> <% end_if %> </div> <% end_if %>