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<?php |
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namespace Jclyons52\PagePreview; |
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use Jclyons52\PHPQuery\Document; |
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class PreviewBuilder |
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{ |
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/** |
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* PHPQuery document object that will be used to select elements |
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* @var \Jclyons52\PHPQuery\Document |
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*/ |
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public $document; |
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/** |
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* reference to the url parameter the user passes into the fetch method |
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* @var string |
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*/ |
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public $url; |
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/** |
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* destructured array of url components from parse_url |
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* @var array |
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*/ |
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protected $urlComponents; |
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/** |
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* @var HttpInterface |
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*/ |
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protected $http; |
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public function __construct(HttpInterface $http) |
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{ |
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$this->http = $http; |
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} |
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/** |
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* Instantiate class with dependencies |
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* @return static |
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*/ |
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public static function create() |
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{ |
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$http = new Http(); |
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return new PreviewBuilder($http); |
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} |
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/** |
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* @param string $url |
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* @return Preview |
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* @throws \Exception |
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*/ |
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public function fetch($url) |
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{ |
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$this->url = new Url($url); |
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$body = $this->http->get($url); |
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if ($body === false) { |
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throw new \Exception('failed to load page'); |
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} |
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$this->document = new Document($body); |
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return $this->getPreview(); |
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} |
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/** |
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* @return string |
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*/ |
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public function title() |
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{ |
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return $this->document->querySelector('title')->text(); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function metaKeywords() |
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{ |
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$keywordsElement = $this->document->querySelector('meta[name="keywords"]'); |
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if (!$keywordsElement) { |
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return []; |
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} |
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$keywordString = $keywordsElement->attr('content'); |
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$keywords = explode(',', $keywordString); |
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return array_map(function ($word) { |
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return trim($word); |
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}, $keywords); |
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} |
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/** |
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* @param string $element |
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* @return array |
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*/ |
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public function meta($element = null) |
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{ |
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$selector = "meta"; |
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if ($element !== null) { |
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$selector .= "[name='{$element}']"; |
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$metaTags = $this->document->querySelector($selector); |
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if ($metaTags === null) { |
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return null; |
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} |
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return $metaTags->attr('content'); |
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} |
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$metaTags = $this->document->querySelectorAll($selector); |
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return $this->metaTagsToArray($metaTags); |
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} |
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/** |
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* get source attributes of all image tags on the page |
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* @return array<String> |
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*/ |
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public function images() |
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{ |
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$images = $this->document->querySelectorAll('img'); |
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if ($images === []) { |
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return []; |
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} |
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$urls = $images->attr('src'); |
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$result = []; |
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foreach ($urls as $url) { |
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$result[] = $this->url->formatRelativeToAbsolute($url); |
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} |
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return $result; |
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} |
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/** |
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* returns an instance of Preview |
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* @return Preview |
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*/ |
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public function getPreview() |
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{ |
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$title = $this->title(); |
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$images = $this->images(); |
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$description = $this->meta('description'); |
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$meta = $this->meta(); |
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$keywords = $this->metaKeywords(); |
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if ($keywords !== []) { |
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$meta['keywords'] = $keywords; |
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} |
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$media = new Media($this->http); |
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return new Preview($media, [ |
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'title' => $title, |
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'images' => $images, |
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'description' => $description, |
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'url' => $this->url->original, |
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'meta' => $meta, |
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]); |
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} |
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/** |
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* @param \Jclyons52\PHPQuery\Support\NodeCollection $metaTags |
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* @return array |
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*/ |
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private function metaTagsToArray($metaTags) |
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{ |
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$values = []; |
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foreach ($metaTags as $meta) { |
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$name = $meta->attr('name'); |
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if ($name === '') { |
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$name = $meta->attr('property'); |
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} |
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$content = $meta->attr('content'); |
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if ($name === '' || $content == '') { |
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continue; |
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} |
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$values[$name] = $content; |
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} |
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return $values; |
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} |
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} |
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jclyons52 /
page-preview
Loading history...
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..