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<?php
namespace Drupal\Core\Pager;
/**
* A value object that represents a pager.
*/
class Pager {
/**
* The total number of items .
*
* @var int
*/
protected $totalItems;
/**
* The total number of pages.
*
* @var int
*/
protected $totalPages;
/**
* The current page of the pager.
*
* @var int
*/
protected $currentPage;
/**
* The maximum number of items per page.
*
* @var int
*/
protected $limit;
/**
* Pager constructor.
*
* @param int $totalItems
* The total number of items.
* @param int $limit
* The maximum number of items per page.
* @param int $currentPage
* The current page.
*/
public function __construct($totalItems, $limit, $currentPage = 0) {
$this->totalItems = $totalItems;
$this->limit = $limit;
$this->setTotalPages($totalItems, $limit);
$this->setCurrentPage($currentPage);
}
/**
* Sets the current page to a valid value within range.
*
* If a page that does not correspond to the actual range of the result set
* was provided, this function will set the closest page actually within
* the result set.
*
* @param int $currentPage
* (optional) The current page.
*/
protected function setCurrentPage($currentPage = 0) {
$this->currentPage = max(0, min($currentPage, $this->getTotalPages() - 1));
}
/**
* Sets the total number of pages.
*
* @param int $totalItems
* The total number of items.
* @param int $limit
* The maximum number of items per page.
*/
protected function setTotalPages($totalItems, $limit) {
$this->totalPages = (int) ceil($totalItems / $limit);
}
/**
* Gets the total number of items.
*
* @return int
* The total number of items.
*/
public function getTotalItems() {
return $this->totalItems;
}
/**
* Gets the total number of pages.
*
* @return int
* The total number of pages.
*/
public function getTotalPages() {
return $this->totalPages;
}
/**
* Gets the current page.
*
* @return int
* The current page.
*/
public function getCurrentPage() {
return $this->currentPage;
}
/**
* Gets the maximum number of items per page.
*
* @return int
* The maximum number of items per page.
*/
public function getLimit() {
return $this->limit;
}
}
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