<?php
class PaginatedByPage extends Extension {

   protected $pageNumGetVar = "page";

   public function PageNums($maxPages = 0){
      $ret = new DataObjectSet();
      if($maxPages) {
         $startPage = ($this->owner->CurrentPage() - floor($maxPages / 2)) - 1;
         $endPage = $this->owner->CurrentPage() + floor($maxPages / 2);

         if($startPage < 0) {
            $startPage = 0;
            $endPage = $maxPages;
         }
         if($endPage > $this->owner->TotalPages()) {
            $endPage = $this->owner->TotalPages();
            $startPage = max(0, $endPage - $maxPages);
         }

      } else {
         $startPage = 0;
         $endPage = $this->owner->TotalPages();
      }

      for($i=$startPage; $i < $endPage; $i++){
         if($i == 0) {
         // $link = Should be just the url without parameters.
// How is this done?
            $link = HTTP::setGetVar($this->pageNumGetVar, $i + 1);
         } else {
            $link = HTTP::setGetVar($this->pageNumGetVar, $i + 1);
         }
         $thePage = new ArrayData(array(
               "PageNum" => $i+1,
               "Link" => $link,
               "CurrentBool" => ($this->owner->CurrentPage() == $i+1)?true:false,
               )
         );
         $ret->push($thePage);
      }

      return $ret;
   }

   public function PageNextLink() {
      if($this->owner->pageStart + $this->owner->pageLength < $this->owner->totalSize) {
         return HTTP::setGetVar($this->pageNumGetVar, $this->owner->CurrentPage() + 1);
      }
   }

   public function PagePrevLink() {
      if($this->owner->pageStart - $this->owner->pageLength >= 0) {
         return HTTP::setGetVar($this->pageNumGetVar, $this->CurrentPage() - 1);
      }
   }

}
?>