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<?php |
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namespace Jclyons52\PagePreview; |
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use GuzzleHttp\Client; |
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use Jclyons52\PHPQuery\Document; |
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use League\Plates\Engine; |
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class Preview |
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{ |
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/** |
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* body from guzzle request |
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* @var string |
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*/ |
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protected $result; |
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/** |
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* Guzzle client |
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* @var \GuzzleHttp\Client |
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*/ |
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protected $client; |
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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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public function __construct(Client $client) |
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{ |
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$this->client = $client; |
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} |
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/** |
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* @param string $url |
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* @return Document |
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*/ |
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public function fetch($url) |
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{ |
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$this->url = $url; |
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$this->urlComponents = parse_url($url); |
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$this->result = $this->client->request('GET', $url); |
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$body = $this->result->getBody()->getContents(); |
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$this->document = new Document($body); |
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return $this->document; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function title() |
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{ |
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return $this->document->querySelector('title')->text(); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function metaKeywords() |
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{ |
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$keywordString = $this->document->querySelector('meta[name="keywords"]')->attr('content'); |
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$keywords = explode(',', $keywordString); |
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return array_map(function ($word) { |
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return trim($word); |
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}, $keywords); |
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} |
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/** |
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* @return array |
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*/ |
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public function meta($element = null) |
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{ |
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$selector = "meta"; |
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if ($element) { |
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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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if ($metaTags === []) { |
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return null; |
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} |
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$values = []; |
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foreach ($metaTags as $meta) { |
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$values[$meta->attr('name')] = $meta->attr('content'); |
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} |
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return $values; |
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} |
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/** |
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* get source attributes of all image tags on the page |
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* @return array<String> |
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*/ |
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public function images() |
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{ |
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$images = $this->document->querySelectorAll('img'); |
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$urls = $images->attr('src'); |
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$result = []; |
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foreach ($urls as $url) { |
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$result[] = $this->formatUrl($url); |
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} |
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return $result; |
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} |
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/** |
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* returns a string of the link preview html |
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* @param string $type template name to be selected |
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* @param string $viewPath path to templates folder |
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* @return string html for link preview |
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*/ |
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public function render($type = 'media', $viewPath = null) |
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{ |
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if ($viewPath === null) { |
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$viewPath = __DIR__ . '/Templates'; |
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} |
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$title = $this->meta('title'); |
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if (!$title) { |
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$title = $this->title(); |
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} |
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$images = $this->images(); |
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if (count($images) > 0) { |
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$image = $images[0]; |
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} else { |
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$image = '#'; |
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} |
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$description = $this->meta('description'); |
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$templates = new Engine($viewPath); |
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return $templates->render($type, [ |
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'title' => $title, |
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'image' => $image, |
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'body' => $description, 'url' => $this->url |
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]); |
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} |
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/** |
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* @param string $url |
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* @return array |
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*/ |
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private function formatUrl($url) |
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{ |
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$path = array_key_exists('path', $this->urlComponents) ? $this->urlComponents['path'] : ''; |
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if (filter_var($url, FILTER_VALIDATE_URL) !== false) { |
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return $url; |
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} |
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if (substr($url, 0, 1) === '/') { |
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return 'http://' . $this->urlComponents['host'] . $url; |
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} |
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return 'http://' . $this->urlComponents['host'] .$path . '/' . $url; |
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} |
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} |
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jclyons52 /
page-preview
Loading history...
Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly.
For example, imagine you have a variable
$accountIdthat can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to theidproperty of an instance of theAccountclass. This class holds a proper account, so the id value must no longer be false.Either this assignment is in error or a type check should be added for that assignment.