Viewing file:  CursorCollection.php (3.19 KB) -rw-r--r--
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<?php
namespace Mollie\Api\Resources;
use Generator;
use Mollie\Api\MollieApiClient;
abstract class CursorCollection extends BaseCollection
{
/**
* @var MollieApiClient
*/
protected $client;
/**
* @param MollieApiClient $client
* @param int $count
* @param \stdClass|null $_links
*/
final public function __construct(MollieApiClient $client, $count, $_links)
{
parent::__construct($count, $_links);
$this->client = $client;
}
/**
* @return BaseResource
*/
abstract protected function createResourceObject();
/**
* Return the next set of resources when available
*
* @return CursorCollection|null
* @throws \Mollie\Api\Exceptions\ApiException
*/
final public function next()
{
if (! $this->hasNext()) {
return null;
}
$result = $this->client->performHttpCallToFullUrl(MollieApiClient::HTTP_GET, $this->_links->next->href);
$collection = new static($this->client, $result->count, $result->_links);
foreach ($result->_embedded->{$collection->getCollectionResourceName()} as $dataResult) {
$collection[] = ResourceFactory::createFromApiResult($dataResult, $this->createResourceObject());
}
return $collection;
}
/**
* Return the previous set of resources when available
*
* @return CursorCollection|null
* @throws \Mollie\Api\Exceptions\ApiException
*/
final public function previous()
{
if (! $this->hasPrevious()) {
return null;
}
$result = $this->client->performHttpCallToFullUrl(MollieApiClient::HTTP_GET, $this->_links->previous->href);
$collection = new static($this->client, $result->count, $result->_links);
foreach ($result->_embedded->{$collection->getCollectionResourceName()} as $dataResult) {
$collection[] = ResourceFactory::createFromApiResult($dataResult, $this->createResourceObject());
}
return $collection;
}
/**
* Determine whether the collection has a next page available.
*
* @return bool
*/
public function hasNext()
{
return isset($this->_links->next->href);
}
/**
* Determine whether the collection has a previous page available.
*
* @return bool
*/
public function hasPrevious()
{
return isset($this->_links->previous->href);
}
/**
* Iterate over a CursorCollection and yield its elements.
*
* @param bool $iterateBackwards
*
* @return LazyCollection
*/
public function getAutoIterator(bool $iterateBackwards = false): LazyCollection
{
$page = $this;
return new LazyCollection(function () use ($page, $iterateBackwards): Generator {
while (true) {
foreach ($page as $item) {
yield $item;
}
if (($iterateBackwards && ! $page->hasPrevious()) || ! $page->hasNext()) {
break;
}
$page = $iterateBackwards
? $page->previous()
: $page->next();
}
});
}
}
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