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<?php |
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namespace TreeHouse\IoBundle\Scrape\Modifier\Item\Mapper; |
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use Symfony\Component\DomCrawler\Crawler; |
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use Symfony\Component\HttpFoundation\ParameterBag; |
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use TreeHouse\Feeder\Modifier\Item\Mapper\MapperInterface; |
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class NodeMapper implements MapperInterface, CrawlerAwareInterface |
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{ |
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/** |
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* @var Crawler |
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*/ |
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protected $crawler; |
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/** |
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* @var array |
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*/ |
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protected $mapping = []; |
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/** |
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* @var string[] |
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*/ |
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protected $filters = []; |
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/** |
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* @var callable[] |
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*/ |
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protected $extractors = []; |
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/** |
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* @param array $mapping |
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*/ |
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public function __construct(array $mapping) |
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{ |
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foreach ($mapping as $name => $selector) { |
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if (is_string($selector)) { |
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$extractor = [$this, 'extractHtml']; |
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} elseif (is_array($selector) && sizeof($selector) === 2) { |
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list($selector, $extractor) = $selector; |
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} else { |
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throw new \InvalidArgumentException('A mapping value must be either a string or array<string, callable>'); |
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} |
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$this->addMapping($name, $selector, $extractor); |
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} |
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} |
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/** |
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* @return array |
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*/ |
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public function getMapping() |
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{ |
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return $this->mapping; |
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} |
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/** |
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* @param string $name |
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* @param string $selector |
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* @param string|callable $extractor |
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*/ |
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public function addMapping($name, $selector, $extractor = 'extractHtml') |
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{ |
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if (is_string($extractor) && method_exists($this, $extractor)) { |
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$extractor = [$this, $extractor]; |
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} |
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if (!is_callable($extractor)) { |
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throw new \InvalidArgumentException( |
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sprintf('The extractor of a mapping must be a callable, but got %s', json_encode($extractor)) |
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); |
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} |
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$this->mapping[$name] = $selector; |
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$this->extractors[$name] = $extractor; |
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$this->filters[$name] = 'filter'; |
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if (preg_match('~^//~', $selector) || strpos($selector, 'descendant-or-self::') === 0) { |
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$this->filters[$name] = 'filterXpath'; |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function setCrawler(Crawler $crawler) |
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{ |
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$this->crawler = $crawler; |
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} |
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/** |
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* @param ParameterBag $item |
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* |
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* @throws \LogicException |
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* |
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* @return ParameterBag |
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*/ |
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public function map(ParameterBag $item) |
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{ |
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if (null === $this->crawler) { |
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throw new \LogicException('setCrawler() should be called before map()'); |
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} |
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foreach ($this->mapping as $name => $selector) { |
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$filter = $this->filters[$name]; |
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$extractor = $this->extractors[$name]; |
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/** @var Crawler $node */ |
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$node = $this->crawler->$filter($selector); |
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if ($node->count() === 0) { |
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$value = null; |
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} else { |
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$value = call_user_func($extractor, $name, $node); |
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} |
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$item->set($name, $value); |
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} |
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return $item; |
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} |
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/** |
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* @param string $field |
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* @param Crawler $node |
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* |
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* @return string |
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*/ |
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2 |
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protected function extractHtml($field, Crawler $node) |
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{ |
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return $node->html(); |
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} |
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/** |
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* @param string $field |
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* @param Crawler $node |
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* |
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* @return string |
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*/ |
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2 |
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protected function extractText($field, Crawler $node) |
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{ |
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2 |
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return $node->text(); |
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} |
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} |
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treehouselabs /
io-bundle
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.