<?php


class Pagination
{
  protected $numItems;
  protected $page;
  protected $limit;
  protected $numPages;
  protected $offset;
  protected $backPage;
  protected $nextPage;


  public function getNumPages()  {  return $this->numPages;  }
  public function getOffset()  {  return $this->offset;  }


  public function getPage()  {  return $this->page;  }
  public function setPage($_val)
  {
    $this->page = intval($_val);
    $this->recalculate();
    return $this;
  }


  public function getFirstPage()  {  return 1;  }
  public function getLastPage()  {  return $this->numPages;  }


  public function getLimit()  {  return $this->limit;  }
  public function setLimit($_val)
  {
    $this->limit = $_val;
    $this->recalculate();
    return $this;
  }


  public function getPreviousPage()  {  return $this->backPage;  }
  public function getNextPage()  {  return $this->nextPage;  }


  public function getLastIndice()
  {
    if ($this->numPages < 1)
    {
      return 1;
    }
    else
    {
      $lastIndice = $this->page * $this->limit;
      $theLastIndice = ($lastIndice > $this->numItems) ? $this->numItems : $lastIndice;
      return $theLastIndice;
    }
  }


  public function getFirstIndice()
  {
    if ($this->numPages < 1)
      {
        return 1;
      }
    else
      {
        return (($this->page * $this->getLimit()) - ($this->getLimit() - 1));
      }
  }


  protected function recalculate()
  {
    // calculate number of pages
    print_r(array($this->numItems, $this->limit));
    $this->numPages = $this->numItems / $this->limit;

    // set previous page
    if ($this->page <= 1)
    {
      $this->backPage = 1;
    }
    else
    {
      $this->backPage = $this->page - 1;
    }

    // set next page
    if ($this->page >= $this->getLastPage())
    {
      $this->nextPage = $this->getLastPage();
    }
    else
    {
      $this->nextPage = $this->page + 1;
    }

    $this->offset = ($this->page - 1) * $this->limit;
    return $this;
  }


  public function __construct($_genericObjAry, $_limit)
  {
    $this->setPage(FusionboxUtilities::getDefault(Delegator::$ID, 1));
    $this->numItems = count($_genericObjAry);
    $this->limit = $_limit;
    $this->recalculate();
  }


  public function __destruct()
  {
  }


}