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Paginator.php
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Paginator.php
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<?php
namespace Ideup\SimplePaginatorBundle\Paginator;
use
Symfony\Component\HttpFoundation\Request
;
/**
* Paginator
*
* @package IdeupSimplePaginatorBundle
* @subpackage Paginator
* @author Francisco Javier Aceituno <javier.aceituno@ideup.com>
* @author Moises Maciá <moises.macia@ideup.com>
*/
class Paginator
{
/**
* @var array $currentPage
*/
protected $currentPage;
/**
* @var array $itemsPerPage
*/
protected $itemsPerPage;
/**
* @var array $maxPagerItems
*/
protected $maxPagerItems;
/**
* @var array $totalItems
*/
protected $totalItems;
/**
* @param Symfony\Component\HttpFoundation\Request $request
*/
public function __construct(Request $request)
{
$paginatorId = $request->get('paginatorId');
$this->setFallbackValues();
$page = (int)$request->get('page');
$this->currentPage = array(
md5($paginatorId) => ($page > 0) ? $page : $this->getFirstPage(),
);
$itemsPerPage = (int)$request->query->get('limit');
$this->setItemsPerPage(($itemsPerPage > 0) ? $itemsPerPage : 10, $paginatorId);
// TODO: MaxPagerItems load by config.yml
$this->setMaxPagerItems(3, $paginatorId);
$this->totalItems = array(md5($paginatorId) => 0);
}
private function setFallbackValues()
{
$hash = md5(null);
$this->currentPage[$hash] = 0;
$this->itemsPerPage[$hash] = 10;
$this->maxPagerItems[$hash] = 3;
$this->totalItems[$hash] = 0;
}
/**
* @param string $id
* @return int
*/
public function getItemsPerPage($id = null)
{
$hash = md5($id);
return isset($this->itemsPerPage[$hash]) ? $this->itemsPerPage[$hash] : $this->itemsPerPage[md5(null)];
}
/**
* @param int $itemsPerPage
* @param string $id
*/
public function setItemsPerPage($itemsPerPage, $id = null)
{
$this->itemsPerPage[md5($id)] = (int)$itemsPerPage;
return $this;
}
/**
* @param string $id
* @return int
*/
public function getMaxPagerItems($id = null)
{
$hash = md5($id);
return isset($this->maxPagerItems[$hash]) ?$this->maxPagerItems[$hash] : $this->maxPagerItems[md5(null)];
}
/**
* @param int $maxPagerItems
* @param string $id
*/
public function setMaxPagerItems($maxPagerItems, $id = null)
{
$this->maxPagerItems[md5($id)] = (int)$maxPagerItems;
return $this;
}
protected function getAdapterOf($collection)
{
if (\is_array($collection)) {
$className = 'Array';
} else {
$r = new \ReflectionClass($collection);
$className = $r->getName();
}
$adapterName =
__NAMESPACE__ . '\\Adapter\\' . $className . 'Adapter'
;
return new $adapterName($collection);
}
/**
* Transforms the given Doctrine DQL into a paginated query
* If you need to paginate various queries in the same controller, you need to specify an $id
*
* @param mixed $collection
* @param string $id
* @return Doctrine\ORM\Query
*/
public function paginate($collection, $id = null)
{
$adapter = $this->getAdapterOf($collection);
$this->totalItems[md5($id)] = $adapter->getTotalResults();
$offset = ($this->getCurrentPage($id) - 1) * $this->getItemsPerPage($id);
return $adapter->setOffset($offset)->setLength($this->getItemsPerPage($id));
}
/**
* @param string $id
* @return int
*/
public function getCurrentPage($id = null)
{
$hash = md5($id);
return isset($this->currentPage[$hash]) ? $this->currentPage[$hash] : $this->getFirstPage();
}
/**
* Get the next page number
*
* @param string $id
* @return int
*/
public function getNextPage($id = null)
{
return $this->getCurrentPage($id) + 1;
}
/**
* Get the previous page number
*
* @param string $id
* @return int
*/
public function getPreviousPage($id = null)
{
return $this->getCurrentPage($id) - 1;
}
/**
* @return int
*/
public function getMaxPageInRange($id = null)
{
$min = $this->getMinPageInRange($id);
if ($min + $this->getMaxPagerItems($id) > $this->getLastPage($id)) {
return $this->getLastPage($id);
}
return $min + $this->getMaxPagerItems($id) - 1;
}
/**
* @param string $id
* @return int
*/
public function getMinPageInRange($id = null)
{
$offset = floor(($this->getMaxPagerItems($id) - 1)/2);
if ($this->getCurrentPage($id) > $offset) {
return $this->getCurrentPage($id) - $offset;
}
return $this->getFirstPage();
}
/**
* Get the total items in the non-paginated version of the query
*
* @param string $id
* @return int
*/
public function getTotalItems($id = null)
{
$hash = md5($id);
return isset($this->totalItems[$hash]) ? $this->totalItems[$hash] : 0;
}
/**
* Gets the last page number
*
* @param string $id
* @return int
*/
public function getLastPage($id = null)
{
return (int)ceil($this->getTotalItems($id) / $this->getItemsPerPage($id));
}
/**
* @return int
*/
public function getFirstPage()
{
return 1;
}
}