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<?php
namespace Illuminate\Pagination;
use Countable;
use ArrayAccess;
use JsonSerializable;
use IteratorAggregate;
use Illuminate\Support\Collection;
use Illuminate\Contracts\Support\Jsonable;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Contracts\Pagination\Presenter;
use Illuminate\Contracts\Pagination\LengthAwarePaginator as LengthAwarePaginatorContract;
class LengthAwarePaginator extends AbstractPaginator implements Arrayable, ArrayAccess, Countable, IteratorAggregate, JsonSerializable, Jsonable, LengthAwarePaginatorContract
{
/**
* The total number of items before slicing.
*
* @var int
*/
protected $total;
/**
* The last available page.
*
* @var int
*/
protected $lastPage;
/**
* Create a new paginator instance.
*
* @param mixed $items
* @param int $total
* @param int $perPage
* @param int|null $currentPage
* @param array $options (path, query, fragment, pageName)
* @return void
*/
public function __construct($items, $total, $perPage, $currentPage = null, array $options = [])
{
foreach ($options as $key => $value) {
$this->{$key} = $value;
}
$this->total = $total;
$this->perPage = $perPage;
$this->lastPage = (int) ceil($total / $perPage);
$this->path = $this->path != '/' ? rtrim($this->path, '/') : $this->path;
$this->currentPage = $this->setCurrentPage($currentPage, $this->lastPage);
$this->items = $items instanceof Collection ? $items : Collection::make($items);
}
/**
* Get the current page for the request.
*
* @param int $currentPage
* @param int $lastPage
* @return int
*/
protected function setCurrentPage($currentPage, $lastPage)
{
$currentPage = $currentPage ?: static::resolveCurrentPage();
return $this->isValidPageNumber($currentPage) ? (int) $currentPage : 1;
}
/**
* Get the URL for the next page.
*
* @return string|null
*/
public function nextPageUrl()
{
if ($this->lastPage() > $this->currentPage()) {
return $this->url($this->currentPage() + 1);
}
}
/**
* Determine if there are more items in the data source.
*
* @return bool
*/
public function hasMorePages()
{
return $this->currentPage() < $this->lastPage();
}
/**
* Get the total number of items being paginated.
*
* @return int
*/
public function total()
{
return $this->total;
}
/**
* Get the last page.
*
* @return int
*/
public function lastPage()
{
return $this->lastPage;
}
/**
* Render the paginator using the given presenter.
*
* @param \Illuminate\Contracts\Pagination\Presenter|null $presenter
* @return string
*/
public function links(Presenter $presenter = null)
{
return $this->render($presenter);
}
/**
* Render the paginator using the given presenter.
*
* @param \Illuminate\Contracts\Pagination\Presenter|null $presenter
* @return string
*/
public function render(Presenter $presenter = null)
{
if (is_null($presenter) && static::$presenterResolver) {
$presenter = call_user_func(static::$presenterResolver, $this);
}
$presenter = $presenter ?: new BootstrapThreePresenter($this);
return $presenter->render();
}
/**
* Get the instance as an array.
*
* @return array
*/
public function toArray()
{
return [
'total' => $this->total(),
'per_page' => $this->perPage(),
'current_page' => $this->currentPage(),
'last_page' => $this->lastPage(),
'next_page_url' => $this->nextPageUrl(),
'prev_page_url' => $this->previousPageUrl(),
'from' => $this->firstItem(),
'to' => $this->lastItem(),
'data' => $this->items->toArray(),
];
}
/**
* Convert the object into something JSON serializable.
*
* @return array
*/
public function jsonSerialize()
{
return $this->toArray();
}
/**
* Convert the object to its JSON representation.
*
* @param int $options
* @return string
*/
public function toJson($options = 0)
{
return json_encode($this->jsonSerialize(), $options);
}
}