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<?php |
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/** |
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* Paginator.php |
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* |
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* @copyright More in license.md |
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* @license http://www.ipublikuj.eu |
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* @author Adam Kadlec http://www.ipublikuj.eu |
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* @package iPublikuj:Twitter! |
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* @subpackage common |
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* @since 5.0 |
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* |
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* @date 20.02.15 |
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*/ |
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namespace IPub\Twitter; |
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use Nette; |
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use IPub; |
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/** |
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* Response paginator |
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* |
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* @package iPublikuj:Twitter! |
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* @subpackage common |
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* |
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* @author Adam Kadlec <[email protected]> |
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* @author Filip Procházka <[email protected]> |
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*/ |
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class Paginator extends Nette\Object implements \Iterator |
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{ |
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const PER_PAGE_MAX = 100; |
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/** |
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* @var ApiCall |
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*/ |
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private $client; |
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/** |
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* @var IPub\OAuth\HttpClient |
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*/ |
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private $httpClient; |
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/** |
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* @var int |
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*/ |
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private $firstPage = 1; |
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/** |
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* @var int |
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*/ |
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private $perPage; |
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/** |
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* @var int|NULL |
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*/ |
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private $maxResults; |
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/** |
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* @var array |
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*/ |
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private $resources = []; |
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/** |
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* @var IPub\OAuth\Api\Response[] |
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*/ |
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private $responses = []; |
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/** |
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* @var int |
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*/ |
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private $itemCursor; |
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/** |
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* @var int |
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*/ |
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private $pageCursor; |
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/** |
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* @param ApiCall $client |
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* @param IPub\OAuth\Api\Response $response |
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*/ |
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public function __construct(ApiCall $client, IPub\OAuth\Api\Response $response) |
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{ |
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$this->client = $client; |
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$this->httpClient = $client->getHttpClient(); |
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$resource = $response->toArray(); |
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$params = $response->request->getParameters(); |
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$this->perPage = isset($params['count']) ? (int) $params['count'] : count($resource); |
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$this->responses[$this->firstPage] = $response; |
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$this->resources[$this->firstPage] = $resource; |
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} |
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/** |
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* If you setup maximum number of results, the pagination will stop after fetching the desired number. |
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* If you have count=50 and wan't to fetch 200 results, it will make 4 requests in total. |
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* |
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* @param int $maxResults |
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* |
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* @return $this |
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*/ |
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public function limitResults($maxResults) |
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{ |
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$this->maxResults = (int)$maxResults; |
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return $this; |
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} |
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public function rewind() |
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{ |
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$this->itemCursor = 0; |
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$this->pageCursor = $this->firstPage; |
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} |
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public function valid() |
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{ |
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return isset($this->resources[$this->pageCursor][$this->itemCursor]) |
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&& ! $this->loadedMaxResults(); |
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} |
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/** |
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* @return bool |
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*/ |
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public function loadedMaxResults() |
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{ |
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if ($this->maxResults === NULL) { |
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return FALSE; |
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} |
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return $this->maxResults <= ($this->itemCursor + ($this->pageCursor - $this->firstPage) * $this->perPage); |
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} |
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public function current() |
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{ |
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if (!$this->valid()) { |
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return NULL; |
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} |
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return Nette\Utils\ArrayHash::from($this->resources[$this->pageCursor][$this->itemCursor]); |
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} |
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public function next() |
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{ |
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$this->itemCursor++; |
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// if cursor points at result of next page, try to load it |
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if ($this->itemCursor < $this->perPage || $this->itemCursor % $this->perPage !== 0) { |
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return; |
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} |
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if (isset($this->resources[$this->pageCursor + 1])) { // already loaded |
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$this->itemCursor = 0; |
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$this->pageCursor++; |
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return; |
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} |
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if ($this->loadedMaxResults()) { |
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return; |
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} |
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try { |
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$prevRequest = $this->responses[$this->pageCursor]->getRequest(); |
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// Get all request parameters |
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$params = $this->responses[$this->pageCursor]->request->getParameters(); |
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// Get last record |
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$current = Nette\Utils\ArrayHash::from($this->resources[$this->pageCursor][$this->itemCursor-1]); |
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// And set maximum ID |
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$params['max_id'] = $current->id; |
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// Get requested path |
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$path = $prevRequest->getUrl()->getPath(); |
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$path = ltrim($path, '/1.1/'); |
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$response = $this->httpClient->makeRequest( |
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$prevRequest->copyWithUrl($this->client->getConfig()->createUrl('api', $path, $params)), |
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'HMAC-SHA1' |
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); |
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$this->itemCursor = 0; |
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$this->pageCursor++; |
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$this->responses[$this->pageCursor] = $response; |
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$this->resources[$this->pageCursor] = $response->toArray(); |
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} catch (\Exception $e) { |
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$this->itemCursor--; // revert back so the user can continue if needed |
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} |
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} |
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public function key() |
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{ |
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return $this->itemCursor + ($this->pageCursor - 1) * $this->perPage; |
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} |
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} |
iPublikuj /
twitter
