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<?php |
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declare(strict_types=1); |
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namespace LauLamanApps\eCurring\Resource; |
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use Iterator; |
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use LauLamanApps\eCurring\eCurringClientInterface; |
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use LauLamanApps\eCurring\Resource\Exception\NonExistentPageNumberException; |
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abstract class Cursor implements Iterator |
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{ |
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/** |
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* @var eCurringClientInterface |
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*/ |
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protected $client; |
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/** |
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* @var int |
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*/ |
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private $currentPage; |
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/** |
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* @var int |
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*/ |
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private $totalPages; |
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/** |
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* @var int |
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*/ |
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private $position; |
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/** |
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* @var Customer[]|Subscription[]|Product[]|Transaction[] |
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*/ |
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private $objects; |
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/** |
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* @var bool |
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* |
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* Automatically load next pages when iterating over objects |
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*/ |
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private $autoload; |
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/** |
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* @var int |
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*/ |
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private $itemsPerPage; |
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public function __construct( |
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eCurringClientInterface $client, |
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int $currentPage, |
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int $totalPages, |
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array $objects, |
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?int $itemsPerPage = 10, |
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?bool $autoload = true |
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) { |
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$this->client = $client; |
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$this->currentPage = $currentPage; |
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$this->totalPages = $totalPages; |
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$this->position = 0; |
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$this->objects = $objects; |
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$this->itemsPerPage = $itemsPerPage; |
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$this->autoload = $autoload; |
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} |
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public function getAll() |
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{ |
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return $this->objects; |
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} |
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public function current() |
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{ |
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return $this->objects[$this->position]; |
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} |
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public function next(): void |
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{ |
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++$this->position; |
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if (!$this->valid() && $this->autoload) { |
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$this->nextPage(); |
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} |
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} |
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public function key(): int |
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{ |
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return $this->position; |
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} |
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public function valid(): bool |
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{ |
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return isset($this->objects[$this->position]); |
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} |
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public function rewind(): void |
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{ |
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$this->position = 0; |
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} |
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public function disableAutoload(): void |
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{ |
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$this->autoload = false; |
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} |
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public function enableAutoload(): void |
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{ |
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$this->autoload = true; |
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} |
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/** |
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* @throws NonExistentPageNumberException |
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*/ |
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public function firstPage(): void |
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{ |
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$this->loadPage(0, $this->itemsPerPage); |
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} |
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/** |
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* @throws NonExistentPageNumberException |
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*/ |
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public function nextPage(): void |
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{ |
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$pageNumber = $this->currentPage +1; |
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if ($pageNumber >= $this->totalPages) { |
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$this->loadPage($pageNumber, $this->itemsPerPage); |
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} |
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} |
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/** |
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* @throws NonExistentPageNumberException |
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*/ |
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public function previousPage(): void |
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{ |
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$pageNumber = $this->currentPage -1; |
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if ($pageNumber < 0) { |
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$this->loadPage($pageNumber, $this->itemsPerPage); |
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} |
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} |
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/** |
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* @throws NonExistentPageNumberException |
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*/ |
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public function goToPage(int $pageNumber): void |
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{ |
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if ($pageNumber < 0 && $pageNumber >= $this->totalPages) { |
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$this->loadPage($pageNumber, $this->itemsPerPage); |
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} else { |
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throw new NonExistentPageNumberException(sprintf('Page number #%s is invalid', $pageNumber)); |
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} |
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} |
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/** |
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* @throws NonExistentPageNumberException |
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*/ |
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public function lastPage(): void |
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{ |
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$this->loadPage($this->totalPages, $this->itemsPerPage); |
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} |
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/** |
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* @throws NonExistentPageNumberException |
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*/ |
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private function loadPage(int $pageNumber, int $itemsPerPage): void |
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{ |
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$this->objects = $this->getPageData($pageNumber, $itemsPerPage)->getAll(); |
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$this->position = 0; |
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$this->currentPage = $pageNumber; |
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} |
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abstract protected function getPageData(int $pageNumber, int $itemsPerPage): self; |
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} |
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LauLamanApps /
ecurring-api
