public function __construct(PageRange $pageRange)
{
$currentPage = $pageRange->getCurrentPage();
$numItemsPerPage = $pageRange->getNumItems();
$totalItems = $pageRange->getTotalItems();
if (!$totalItems) {
$this->isOutOfBounds = true;
$this->numItemsPerPage = $numItemsPerPage;
return;
}
$isOutOfBounds = $currentPage > ceil($totalItems / $numItemsPerPage);
// pages
$numPages = ceil($totalItems / $numItemsPerPage);
$currentPage = $isOutOfBounds ? 1 : $currentPage;
// go to page 1 if out of bounds
$previousPage = $currentPage == 1 ? $numPages : $currentPage - 1;
// flip around if at the beginning
$nextPage = $currentPage == $numPages ? 1 : $currentPage + 1;
// flip around if at the end
$firstPage = 1;
$lastPage = $numPages;
// num items on current page
if ($currentPage == $numPages && $currentPage > 1) {
$numItemsOnCurrentPage = $totalItems % $numItemsPerPage;
} else {
if ($totalItems < $numItemsPerPage) {
$numItemsOnCurrentPage = $totalItems;
} else {
$numItemsOnCurrentPage = $numItemsPerPage;
}
}
// indices (start at 0)
$offset = ($currentPage - 1) * $numItemsPerPage;
$last = $offset + $numItemsOnCurrentPage - 1;
// items
$firstItemOnCurrentPage = $offset + 1;
$lastItemOnCurrentPage = $last + 1;
// set instance vars
$this->isOutOfBounds = $isOutOfBounds;
$this->totalItems = (int) $totalItems;
$this->numItemsPerPage = (int) $numItemsPerPage;
$this->numItemsOnCurrentPage = (int) $numItemsOnCurrentPage;
$this->firstItemOnCurrentPage = (int) $firstItemOnCurrentPage;
$this->lastItemOnCurrentPage = (int) $lastItemOnCurrentPage;
$this->numPages = (int) $numPages;
$this->currentPage = (int) $currentPage;
$this->previousPage = (int) $previousPage;
$this->nextPage = (int) $nextPage;
$this->firstPage = (int) $firstPage;
$this->lastPage = (int) $lastPage;
$this->offset = (int) $offset;
$this->last = (int) $last;
return $this;
}
