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<?php
namespace Illuminate\Http\Resources\Json;
use Countable;
use Illuminate\Http\Resources\CollectsResources;
use Illuminate\Pagination\AbstractCursorPaginator;
use Illuminate\Pagination\AbstractPaginator;
use IteratorAggregate;
class ResourceCollection extends JsonResource implements Countable, IteratorAggregate
{
use CollectsResources;
/**
* The resource that this resource collects.
*
* @var string
*/
public $collects;
/**
* The mapped collection instance.
*
* @var \Illuminate\Support\Collection
*/
public $collection;
/**
* Indicates if all existing request query parameters should be added to pagination links.
*
* @var bool
*/
protected $preserveAllQueryParameters = false;
/**
* The query parameters that should be added to the pagination links.
*
* @var array|null
*/
protected $queryParameters;
/**
* Create a new resource instance.
*
* @param mixed $resource
* @return void
*/
public function __construct($resource)
{
parent::__construct($resource);
$this->resource = $this->collectResource($resource);
}
/**
* Indicate that all current query parameters should be appended to pagination links.
*
* @return $this
*/
public function preserveQuery()
{
$this->preserveAllQueryParameters = true;
return $this;
}
/**
* Specify the query string parameters that should be present on pagination links.
*
* @param array $query
* @return $this
*/
public function withQuery(array $query)
{
$this->preserveAllQueryParameters = false;
$this->queryParameters = $query;
return $this;
}
/**
* Return the count of items in the resource collection.
*
* @return int
*/
public function count()
{
return $this->collection->count();
}
/**
* Transform the resource into a JSON array.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
public function toArray($request)
{
return $this->collection->map->toArray($request)->all();
}
/**
* Create an HTTP response that represents the object.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\JsonResponse
*/
public function toResponse($request)
{
if ($this->resource instanceof AbstractPaginator || $this->resource instanceof AbstractCursorPaginator) {
return $this->preparePaginatedResponse($request);
}
return parent::toResponse($request);
}
/**
* Create a paginate-aware HTTP response.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\JsonResponse
*/
protected function preparePaginatedResponse($request)
{
if ($this->preserveAllQueryParameters) {
$this->resource->appends($request->query());
} elseif (! is_null($this->queryParameters)) {
$this->resource->appends($this->queryParameters);
}
return (new PaginatedResourceResponse($this))->toResponse($request);
}
}