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<?php |
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namespace Jerodev\Diglett; |
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use Symfony\Component\DomCrawler\Crawler; |
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class Diglett |
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{ |
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/** |
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* The Symfony DomCrawler to work with. |
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* |
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* @var Crawler |
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*/ |
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private $crawler; |
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/** |
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* An array of special ICssFilter's |
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* |
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* @var array |
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*/ |
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private $cssFilters; |
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/** |
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* Create a diglett instance from a Symfony Crawler. |
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* |
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* @param Crawler |
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* @param array|null $cssFilters |
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*/ |
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public function __construct(Crawler $crawler, ?array $cssFilters = null) |
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{ |
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$this->crawler = $crawler; |
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// If no css filters are set, add the default list |
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if ($cssFilters === null) |
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{ |
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$cssFilters = [ |
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CssFilters\FirstFilter::class, |
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CssFilters\NthFilter::class |
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]; |
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} |
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$this->cssFilters = []; |
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foreach ($cssFilters as $filter) |
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{ |
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if (!class_exists($filter) || !in_array(CssFilters\ICssFilter::class, class_implements($filter))) |
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throw new \ErrorException("All CssFilters should implement ICssFilter, '$filter' does not."); |
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$this->cssFilters[$filter::getFunctionName()] = $filter; |
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} |
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} |
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/** |
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* Get the underlying crawler object |
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* |
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* @return Crawler |
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*/ |
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public function getCrawler(): Crawler |
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{ |
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return $this->crawler; |
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} |
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/** |
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* Use special css selectors to fetch several values |
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* |
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* @param array $selectors |
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* @return array |
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*/ |
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public function getTexts(array $selectors): array |
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{ |
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$results = []; |
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foreach ($selectors as $key => $value) |
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{ |
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$results[$key] = $this->getText($value); |
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} |
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return $results; |
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} |
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/** |
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* Get the value for a single special css selector |
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* |
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* @param string $selector |
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* @return string|null |
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*/ |
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public function getText(string $selector): ?string |
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{ |
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$attribute = null; |
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$selector = preg_replace_callback( |
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'/\{(.*?)\}$/', |
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function ($matches) use (&$attribute) { |
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$attribute = $matches[1] ?? null; |
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}, |
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$selector |
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); |
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$parsedSelector = CssFilterParser::parse($selector, $this->cssFilters); |
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$crawler = $this->crawler; |
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foreach ($parsedSelector as $part) |
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{ |
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$crawler = $crawler->filter($part['selector']); |
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foreach ($part['functions'] as $function) |
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{ |
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$crawler = $function->filterNodes($crawler); |
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} |
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if (empty($crawler) || $crawler->count() === 0) |
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{ |
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return null; |
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} |
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} |
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return $attribute === null ? $crawler->text() : $crawler->attr($attribute); |
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} |
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} |
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jerodev /
diglett
