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<?php |
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namespace CultuurNet\UDB3\Search; |
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use CultuurNet\UDB3\Offer\OfferIdentifierInterface; |
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use Psr\Log\LoggerAwareInterface; |
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use Psr\Log\LoggerAwareTrait; |
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use Psr\Log\NullLogger; |
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class ResultsGenerator implements LoggerAwareInterface, ResultsGeneratorInterface |
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{ |
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use LoggerAwareTrait; |
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/** |
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* Default sorting method because it's ideal for getting consistent paging |
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* results. |
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*/ |
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const SORT_CREATION_DATE_ASC = 'creationdate asc'; |
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/** |
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* @var SearchServiceInterface |
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*/ |
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private $searchService; |
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/** |
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* @var string |
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*/ |
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private $sorting; |
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/** |
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* @var int |
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*/ |
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private $pageSize; |
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/** |
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* @param SearchServiceInterface $searchService |
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* @param string $sorting |
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* @param int $pageSize |
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*/ |
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public function __construct( |
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SearchServiceInterface $searchService, |
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$sorting = self::SORT_CREATION_DATE_ASC, |
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$pageSize = 10 |
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) { |
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$this->searchService = $searchService; |
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$this->sorting = $sorting; |
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$this->pageSize = 10; |
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// Set a default logger so we don't need to check if a logger is set |
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// when we actually try to log something. This can easily be overridden |
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// from outside as this method is public. |
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$this->setLogger(new NullLogger()); |
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} |
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/** |
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* @param string $sorting |
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* @return ResultsGenerator |
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*/ |
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public function withSorting($sorting) |
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{ |
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$c = clone $this; |
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$c->sorting = $sorting; |
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return $c; |
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} |
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/** |
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* @return string |
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*/ |
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public function getSorting() |
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{ |
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return $this->sorting; |
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} |
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/** |
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* @param string $pageSize |
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* @return ResultsGenerator |
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*/ |
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public function withPageSize($pageSize) |
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{ |
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$c = clone $this; |
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$c->pageSize = $pageSize; |
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return $c; |
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} |
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/** |
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* @return int |
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*/ |
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public function getPageSize() |
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{ |
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return $this->pageSize; |
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} |
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/** |
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* @param string $query |
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* @return \Iterator |
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*/ |
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public function search($query) |
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{ |
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$currentPage = 0; |
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$ids = []; |
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do { |
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$results = $this->searchService->search( |
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$query, |
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$this->pageSize, |
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$this->pageSize * $currentPage, |
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$this->sorting |
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); |
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$total = $results->getTotalItems()->toNative(); |
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foreach ($results->getItems() as $item) { |
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$id = $item->getId(); |
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if (!isset($ids[$id])) { |
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// Store result id with current page in case we run into |
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// the same id again later. |
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$ids[$id] = $currentPage; |
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yield $id => $item; |
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} else { |
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$this->logger->error( |
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'query_duplicate_event', |
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array( |
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'query' => $query, |
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'error' => "Found duplicate offer {$id} on page {$currentPage}, " . |
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"occurred first time on page {$ids[$id]}." |
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) |
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); |
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} |
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} |
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$currentPage++; |
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} while ($currentPage < ceil($total / $this->pageSize)); |
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} |
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} |
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.