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<?php |
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namespace Cerbero\LazyJsonPages; |
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use Cerbero\LazyJsonPages\Exceptions\LazyJsonPagesException; |
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use Cerbero\LazyJsonPages\Handlers; |
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use IteratorAggregate; |
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use Traversable; |
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/** |
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* The JSON source. |
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* |
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*/ |
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class Source implements IteratorAggregate |
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{ |
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/** |
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* The traversable items. |
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* |
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* @var Traversable |
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*/ |
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protected $traversable; |
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/** |
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* The pagination handlers. |
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* |
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* @var array |
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*/ |
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protected $handlers = [ |
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Handlers\TotalPagesHandler::class, |
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Handlers\TotalItemsHandler::class, |
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Handlers\ItemsPerPageHandler::class, |
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Handlers\NextPageHandler::class, |
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Handlers\LastPageHandler::class, |
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]; |
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/** |
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* Instantiate the class. |
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* |
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* @param \Psr\Http\Message\RequestInterface|\Illuminate\Http\Client\Response $source |
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* @param string $path |
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* @param callable|array|string|int $config |
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*/ |
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public function __construct($source, string $path, $config) |
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{ |
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$this->traversable = $this->toTraversable(new Config($source, $path, $config)); |
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} |
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/** |
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* Retrieve the traversable items depending on the given configuration |
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* |
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* @param Config $config |
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* @return Traversable |
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* |
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* @throws LazyJsonPagesException |
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*/ |
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protected function toTraversable(Config $config): Traversable |
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{ |
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foreach ($this->handlers as $class) { |
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/** @var Handlers\AbstractHandler $handler */ |
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$handler = new $class($config); |
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if ($handler->matches()) { |
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return $handler->handle(); |
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} |
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} |
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throw new LazyJsonPagesException('Unable to load paginated items from the provided source.'); |
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} |
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/** |
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* Retrieve the traversable items |
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* |
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* @return Traversable |
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*/ |
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public function getIterator(): Traversable |
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{ |
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return $this->traversable; |
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} |
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} |
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cerbero90 /
lazy-json-pages
