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<?php |
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namespace Goose\Modules\Extractors; |
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use Goose\Article; |
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use Goose\Images\Image; |
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use Goose\Images\ImageUtils; |
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use Goose\Images\LocallyStoredImage; |
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use Goose\Traits\ArticleMutatorTrait; |
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use Goose\Modules\AbstractModule; |
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use Goose\Modules\ModuleInterface; |
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use DOMWrap\Element; |
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use DOMWrap\NodeList; |
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/** |
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* Image Extractor |
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* |
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* @package Goose\Modules\Extractors |
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0 |
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*/ |
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class ImageExtractor extends AbstractModule implements ModuleInterface { |
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use ArticleMutatorTrait; |
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/** @var string[] */ |
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private $badFileNames = [ |
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'\.html', '\.gif', '\.ico', 'button', 'twitter\.jpg', 'facebook\.jpg', |
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'ap_buy_photo', 'digg\.jpg', 'digg\.png', 'delicious\.png', |
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'facebook\.png', 'reddit\.jpg', 'doubleclick', 'diggthis', |
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'diggThis', 'adserver', '\/ads\/', 'ec\.atdmt\.com', 'mediaplex\.com', |
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'adsatt', 'view\.atdmt', |
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]; |
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/** @var string[] */ |
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private static $KNOWN_IMG_DOM_NAMES = [ |
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'yn-story-related-media', |
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'cnn_strylccimg300cntr', |
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'big_photo', |
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'ap-smallphoto-a' |
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]; |
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/** @var int */ |
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private static $MAX_PARENT_DEPTH = 2; |
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/** @var string[] */ |
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private static $CUSTOM_SITE_MAPPING = []; |
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/** |
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* @param Article $article |
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*/ |
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public function run(Article $article) { |
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$this->article($article); |
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if ($this->config()->get('image_fetch_best')) { |
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$article->setTopImage($this->getBestImage()); |
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if ($this->config()->get('image_fetch_all') |
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&& $article->getTopNode() instanceof Element) { |
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$article->setAllImages($this->getAllImages()); |
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} |
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} |
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} |
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/** |
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* @return Image|null |
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*/ |
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private function getBestImage() { |
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$image = $this->checkForKnownElements(); |
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if ($image) { |
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return $image; |
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} |
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$image = $this->checkForMetaTag(); |
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if ($image) { |
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return $image; |
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} |
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if ($this->article()->getTopNode() instanceof Element) { |
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$image = $this->checkForLargeImages($this->article()->getTopNode(), 0, 0); |
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if ($image) { |
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return $image; |
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} |
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} |
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return null; |
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} |
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/** |
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* Prefer Twitter images (as they tend to have the right size for us), then Open Graph images |
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* (which seem to be smaller), and finally linked images. |
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* |
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* @return Image|null |
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*/ |
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private function checkForMetaTag() { |
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$image = $this->checkForTwitterTag(); |
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if ($image) { |
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return $image; |
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} |
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$image = $this->checkForOpenGraphTag(); |
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if ($image) { |
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return $image; |
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} |
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$image = $this->checkForLinkTag(); |
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if ($image) { |
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return $image; |
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} |
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return null; |
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} |
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/** |
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* although slow the best way to determine the best image is to download them and check the actual dimensions of the image when on disk |
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* so we'll go through a phased approach... |
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* 1. get a list of ALL images from the parent node |
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* 2. filter out any bad image names that we know of (gifs, ads, etc..) |
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* 3. do a head request on each file to make sure it meets our bare requirements |
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* 4. any images left over let's do a full GET request, download em to disk and check their dimensions |
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* 5. Score images based on different factors like height/width and possibly things like color density |
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* |
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* @param Element $node |
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* @param int $parentDepthLevel |
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* @param int $siblingDepthLevel |
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* |
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* @return Image|null |
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*/ |
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private function checkForLargeImages(Element $node, $parentDepthLevel, $siblingDepthLevel) { |
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$goodLocalImages = $this->getImageCandidates($node); |
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$scoredLocalImages = $this->scoreLocalImages($goodLocalImages, $parentDepthLevel); |
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ksort($scoredLocalImages); |
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if (!empty($scoredLocalImages)) { |
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foreach ($scoredLocalImages as $imageScore => $scoredLocalImage) { |
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$mainImage = new Image(); |
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$mainImage->setImageSrc($scoredLocalImage->getImgSrc()); |
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$mainImage->setImageExtractionType('bigimage'); |
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$mainImage->setConfidenceScore(100 / count($scoredLocalImages)); |
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$mainImage->setImageScore($imageScore); |
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$mainImage->setBytes($scoredLocalImage->getBytes()); |
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$mainImage->setHeight($scoredLocalImage->getHeight()); |
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$mainImage->setWidth($scoredLocalImage->getWidth()); |
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return $mainImage; |
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} |
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} else { |
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$depthObj = $this->getDepthLevel($node, $parentDepthLevel, $siblingDepthLevel); |
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if ($depthObj && NULL !== $depthObj->node) { |
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return $this->checkForLargeImages($depthObj->node, $depthObj->parentDepth, $depthObj->siblingDepth); |
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} |
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} |
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return null; |
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} |
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/** |
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* @param Element $node |
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* @param int $parentDepth |
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* @param int $siblingDepth |
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* |
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* @return object|null |
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*/ |
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private function getDepthLevel(Element $node, $parentDepth, $siblingDepth) { |
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if (is_null($node) || !($node->parent() instanceof Element)) { |
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return null; |
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} |
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if ($parentDepth > self::$MAX_PARENT_DEPTH) { |
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return null; |
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} |
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// Find previous sibling element node |
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$siblingNode = $node->preceding(function($node) { |
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return $node instanceof Element; |
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}); |
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if (is_null($siblingNode)) { |
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return (object)[ |
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'node' => $node->parent(), |
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'parentDepth' => $parentDepth + 1, |
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'siblingDepth' => 0, |
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]; |
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} |
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return (object)[ |
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'node' => $siblingNode, |
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'parentDepth' => $parentDepth, |
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'siblingDepth' => $siblingDepth + 1, |
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]; |
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} |
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/** |
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* Set image score and on locally downloaded images |
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* |
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* we're going to score the images in the order in which they appear so images higher up will have more importance, |
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* we'll count the area of the 1st image as a score of 1 and then calculate how much larger or small each image after it is |
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* we'll also make sure to try and weed out banner type ad blocks that have big widths and small heights or vice versa |
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* so if the image is 3rd found in the dom it's sequence score would be 1 / 3 = .33 * diff in area from the first image |
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* |
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* @param LocallyStoredImage[] $locallyStoredImages |
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* @param int $depthLevel |
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* |
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* @return LocallyStoredImage[] |
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*/ |
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private function scoreLocalImages($locallyStoredImages, $depthLevel) { |
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$results = []; |
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$i = 1; |
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$initialArea = 0; |
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// Limit to the first 30 images |
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$locallyStoredImages = array_slice($locallyStoredImages, 0, 30); |
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foreach ($locallyStoredImages as $locallyStoredImage) { |
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$sequenceScore = 1 / $i; |
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$area = $locallyStoredImage->getWidth() * $locallyStoredImage->getHeight(); |
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if ($initialArea == 0) { |
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$initialArea = $area * 1.48; |
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$totalScore = 1; |
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} else { |
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$areaDifference = $area * $initialArea; |
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$totalScore = $sequenceScore * $areaDifference; |
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} |
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$i++; |
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$results[$totalScore] = $locallyStoredImage; |
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} |
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return $results; |
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} |
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/** |
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* @param LocallyStoredImage $locallyStoredImage |
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* @param int $depthLevel |
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* |
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* @return bool |
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*/ |
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private function isWorthyImage($locallyStoredImage, $depthLevel) { |
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if ($locallyStoredImage->getWidth() <= $this->config()->get('image_min_width') |
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|| $locallyStoredImage->getHeight() <= $this->config()->get('image_min_height') |
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|| $locallyStoredImage->getFileExtension() == 'NA' |
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|| ($depthLevel < 1 && $locallyStoredImage->getWidth() < 300) || $depthLevel >= 1 |
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|| $this->isBannerDimensions($locallyStoredImage->getWidth(), $locallyStoredImage->getHeight())) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @return Image[] |
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*/ |
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private function getAllImages() { |
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$results = []; |
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$images = $this->article()->getTopNode()->find('img'); |
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// Generate a complete URL for each image |
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$imageUrls = array_map(function($image) { |
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return $this->buildImagePath($image->attr('src')); |
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}, $images->toArray()); |
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$localImages = $this->getLocallyStoredImages($imageUrls); |
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foreach ($localImages as $localImage) { |
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$image = new Image(); |
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$image->setImageSrc($localImage->getImgSrc()); |
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$image->setBytes($localImage->getBytes()); |
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$image->setHeight($localImage->getHeight()); |
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$image->setWidth($localImage->getWidth()); |
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$image->setImageExtractionType('all'); |
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$image->setConfidenceScore(0); |
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$results[] = $image; |
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} |
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return $results; |
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} |
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/** |
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* returns true if we think this is kind of a bannery dimension |
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* like 600 / 100 = 6 may be a fishy dimension for a good image |
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* |
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* @param int $width |
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* @param int $height |
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*/ |
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private function isBannerDimensions($width, $height) { |
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if ($width == $height) { |
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return false; |
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} |
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View Code Duplication |
if ($width > $height) { |
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$diff = $width / $height; |
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if ($diff > 5) { |
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return true; |
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} |
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} |
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View Code Duplication |
if ($height > $width) { |
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$diff = $height / $width; |
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if ($diff > 5) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* takes a list of image elements and filters out the ones with bad names |
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* |
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* @param \DOMWrap\NodeList $images |
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* |
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* @return Element[] |
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*/ |
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private function filterBadNames(NodeList $images) { |
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$goodImages = []; |
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foreach ($images as $image) { |
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if ($this->isOkImageFileName($image)) { |
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$goodImages[] = $image; |
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} else { |
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$image->remove(); |
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} |
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} |
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return $goodImages; |
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} |
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/** |
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* will check the image src against a list of bad image files we know of like buttons, etc... |
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* |
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* @param Element $imageNode |
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* |
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* @return bool |
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*/ |
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private function isOkImageFileName(Element $imageNode) { |
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$imgSrc = $imageNode->attr('src'); |
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349
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if (empty($imgSrc)) { |
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return false; |
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} |
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$regex = '@' . implode('|', $this->badFileNames) . '@i'; |
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if (preg_match($regex, $imgSrc)) { |
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return false; |
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} |
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return true; |
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} |
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362
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/** |
363
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* @param Element $node |
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* |
365
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* @return LocallyStoredImage[] |
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*/ |
367
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private function getImageCandidates(Element $node) { |
368
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$images = $node->find('img'); |
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$filteredImages = $this->filterBadNames($images); |
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$goodImages = $this->findImagesThatPassByteSizeTest($filteredImages); |
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return $goodImages; |
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} |
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/** |
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|
|
* loop through all the images and find the ones that have the best bytes to even make them a candidate |
377
|
|
|
* |
378
|
|
|
* @param Element[] $images |
379
|
|
|
* |
380
|
|
|
* @return LocallyStoredImage[] |
381
|
|
|
*/ |
382
|
|
|
private function findImagesThatPassByteSizeTest($images) { |
383
|
|
|
$i = 0; /** @todo Re-factor how the LocallyStoredImage => Image relation works ? Note: PHP 5.6.x adds a 3rd argument to array_filter() to pass the key as well as value. */ |
384
|
|
|
|
385
|
|
|
// Limit to the first 30 images |
386
|
|
|
$images = array_slice($images, 0, 30); |
387
|
|
|
|
388
|
|
|
// Generate a complete URL for each image |
389
|
|
|
$imageUrls = array_map(function($image) { |
390
|
|
|
return $this->buildImagePath($image->attr('src')); |
391
|
|
|
}, $images); |
392
|
|
|
|
393
|
|
|
$localImages = $this->getLocallyStoredImages($imageUrls, true); |
394
|
|
|
|
395
|
|
|
$results = array_filter($localImages, function($localImage) use($images, $i) { |
396
|
|
|
$image = $images[$i++]; |
397
|
|
|
|
398
|
|
|
$bytes = $localImage->getBytes(); |
399
|
|
|
|
400
|
|
|
if ($bytes < $this->config()->get('image_min_bytes') && $bytes != 0 || $bytes > $this->config()->get('image_max_bytes')) { |
401
|
|
|
$image->remove(); |
402
|
|
|
|
403
|
|
|
return false; |
404
|
|
|
} |
405
|
|
|
|
406
|
|
|
return true; |
407
|
|
|
}); |
408
|
|
|
|
409
|
|
|
return $results; |
410
|
|
|
} |
411
|
|
|
|
412
|
|
|
/** |
413
|
|
|
* checks to see if we were able to find feature image tags on this page |
414
|
|
|
* |
415
|
|
|
* @return Image|null |
416
|
|
|
*/ |
417
|
|
|
private function checkForLinkTag() { |
418
|
|
|
return $this->checkForTag('link[rel="image_src"]', 'href', 'linktag'); |
419
|
|
|
} |
420
|
|
|
|
421
|
|
|
/** |
422
|
|
|
* checks to see if we were able to find open graph tags on this page |
423
|
|
|
* |
424
|
|
|
* @return Image|null |
425
|
|
|
*/ |
426
|
|
|
private function checkForOpenGraphTag() { |
427
|
|
|
return $this->checkForTag('meta[property="og:image"],meta[name="og:image"]', 'content', 'opengraph'); |
428
|
|
|
} |
429
|
|
|
|
430
|
|
|
/** |
431
|
|
|
* checks to see if we were able to find twitter tags on this page |
432
|
|
|
* |
433
|
|
|
* @return Image|null |
434
|
|
|
*/ |
435
|
|
|
private function checkForTwitterTag() { |
436
|
|
|
return $this->checkForTag('meta[property="twitter:image"],meta[name="twitter:image"],meta[property="twitter:image:src"],meta[name="twitter:image:src"]', 'content', 'twitter'); |
437
|
|
|
} |
438
|
|
|
|
439
|
|
|
/** |
440
|
|
|
* @param string $selector |
441
|
|
|
* @param string $attr |
442
|
|
|
* @param string $type |
443
|
|
|
* |
444
|
|
|
* @return Image|null |
445
|
|
|
*/ |
446
|
|
|
private function checkForTag($selector, $attr, $type) { |
447
|
|
|
$meta = $this->article()->getRawDoc()->find($selector); |
448
|
|
|
|
449
|
|
|
if (!$meta->count()) { |
450
|
|
|
return null; |
451
|
|
|
} |
452
|
|
|
|
453
|
|
|
$node = $meta->first(); |
454
|
|
|
|
455
|
|
|
if (!($node instanceof Element)) { |
456
|
|
|
return null; |
457
|
|
|
} |
458
|
|
|
|
459
|
|
|
if (!$node->hasAttribute($attr)) { |
460
|
|
|
return null; |
461
|
|
|
} |
462
|
|
|
|
463
|
|
|
$imagePath = $this->buildImagePath($node->attr($attr)); |
|
|
|
|
464
|
|
|
$mainImage = new Image(); |
465
|
|
|
$mainImage->setImageSrc($imagePath); |
466
|
|
|
$mainImage->setImageExtractionType($type); |
467
|
|
|
$mainImage->setConfidenceScore(100); |
468
|
|
|
|
469
|
|
|
$locallyStoredImage = $this->getLocallyStoredImage($mainImage->getImageSrc()); |
470
|
|
|
|
471
|
|
View Code Duplication |
if (!empty($locallyStoredImage)) { |
|
|
|
|
472
|
|
|
$mainImage->setBytes($locallyStoredImage->getBytes()); |
473
|
|
|
$mainImage->setHeight($locallyStoredImage->getHeight()); |
474
|
|
|
$mainImage->setWidth($locallyStoredImage->getWidth()); |
475
|
|
|
} |
476
|
|
|
|
477
|
|
|
return $this->ensureMinimumImageSize($mainImage); |
478
|
|
|
} |
479
|
|
|
|
480
|
|
|
/** |
481
|
|
|
* @param Image $mainImage |
482
|
|
|
* |
483
|
|
|
* @return Image|null |
484
|
|
|
*/ |
485
|
|
|
private function ensureMinimumImageSize(Image $mainImage) { |
486
|
|
|
if ($mainImage->getWidth() >= $this->config()->get('image_min_width') |
487
|
|
|
&& $mainImage->getHeight() >= $this->config()->get('image_min_height')) { |
488
|
|
|
return $mainImage; |
489
|
|
|
} |
490
|
|
|
|
491
|
|
|
return null; |
492
|
|
|
} |
493
|
|
|
|
494
|
|
|
/** |
495
|
|
|
* @param string $imageSrc |
496
|
|
|
* @param bool $returnAll |
497
|
|
|
* |
498
|
|
|
* @return LocallyStoredImage|null |
499
|
|
|
*/ |
500
|
|
|
private function getLocallyStoredImage($imageSrc, $returnAll = false) { |
501
|
|
|
$locallyStoredImages = ImageUtils::storeImagesToLocalFile([$imageSrc], $returnAll, $this->config()); |
502
|
|
|
|
503
|
|
|
return array_shift($locallyStoredImages); |
504
|
|
|
} |
505
|
|
|
|
506
|
|
|
/** |
507
|
|
|
* @param string[] $imageSrcs |
508
|
|
|
* @param bool $returnAll |
509
|
|
|
* |
510
|
|
|
* @return LocallyStoredImage[] |
511
|
|
|
*/ |
512
|
|
|
private function getLocallyStoredImages($imageSrcs, $returnAll = false) { |
513
|
|
|
return ImageUtils::storeImagesToLocalFile($imageSrcs, $returnAll, $this->config()); |
514
|
|
|
} |
515
|
|
|
|
516
|
|
|
/** |
517
|
|
|
* @return string |
518
|
|
|
*/ |
519
|
|
|
private function getCleanDomain() { |
520
|
|
|
return implode('.', array_slice(explode('.', $this->article()->getDomain()), -2, 2)); |
521
|
|
|
} |
522
|
|
|
|
523
|
|
|
/** |
524
|
|
|
* In here we check for known image contains from sites we've checked out like yahoo, techcrunch, etc... that have |
525
|
|
|
* known places to look for good images. |
526
|
|
|
* |
527
|
|
|
* @todo enable this to use a series of settings files so people can define what the image ids/classes are on specific sites |
528
|
|
|
* |
529
|
|
|
* @return Image|null |
530
|
|
|
*/ |
531
|
|
|
private function checkForKnownElements() { |
532
|
|
|
if (!$this->article()->getRawDoc()) { |
533
|
|
|
return null; |
534
|
|
|
} |
535
|
|
|
|
536
|
|
|
$knownImgDomNames = self::$KNOWN_IMG_DOM_NAMES; |
537
|
|
|
|
538
|
|
|
$domain = $this->getCleanDomain(); |
539
|
|
|
|
540
|
|
|
$customSiteMapping = $this->customSiteMapping(); |
541
|
|
|
|
542
|
|
|
if (isset($customSiteMapping[$domain])) { |
543
|
|
|
foreach (explode('|', $customSiteMapping[$domain]) as $class) { |
544
|
|
|
$knownImgDomNames[] = $class; |
545
|
|
|
} |
546
|
|
|
} |
547
|
|
|
|
548
|
|
|
$knownImage = null; |
549
|
|
|
|
550
|
|
|
foreach ($knownImgDomNames as $knownName) { |
551
|
|
|
$known = $this->article()->getRawDoc()->find('#' . $knownName); |
552
|
|
|
|
553
|
|
|
if (!$known->count()) { |
554
|
|
|
$known = $this->article()->getRawDoc()->find('.' . $knownName); |
555
|
|
|
} |
556
|
|
|
|
557
|
|
|
if ($known->count()) { |
558
|
|
|
$mainImage = $known->first()->find('img'); |
559
|
|
|
|
560
|
|
|
if ($mainImage->count()) { |
561
|
|
|
$knownImage = $mainImage->first(); |
562
|
|
|
} |
563
|
|
|
} |
564
|
|
|
} |
565
|
|
|
|
566
|
|
|
if (is_null($knownImage)) { |
567
|
|
|
return null; |
568
|
|
|
} |
569
|
|
|
|
570
|
|
|
$knownImgSrc = $knownImage->attr('src'); |
571
|
|
|
|
572
|
|
|
$mainImage = new Image(); |
573
|
|
|
$mainImage->setImageSrc($this->buildImagePath($knownImgSrc)); |
574
|
|
|
$mainImage->setImageExtractionType('known'); |
575
|
|
|
$mainImage->setConfidenceScore(90); |
576
|
|
|
|
577
|
|
|
$locallyStoredImage = $this->getLocallyStoredImage($mainImage->getImageSrc()); |
578
|
|
|
|
579
|
|
View Code Duplication |
if (!empty($locallyStoredImage)) { |
|
|
|
|
580
|
|
|
$mainImage->setBytes($locallyStoredImage->getBytes()); |
581
|
|
|
$mainImage->setHeight($locallyStoredImage->getHeight()); |
582
|
|
|
$mainImage->setWidth($locallyStoredImage->getWidth()); |
583
|
|
|
} |
584
|
|
|
|
585
|
|
|
return $this->ensureMinimumImageSize($mainImage); |
586
|
|
|
} |
587
|
|
|
|
588
|
|
|
/** |
589
|
|
|
* This method will take an image path and build out the absolute path to that image |
590
|
|
|
* using the initial url we crawled so we can find a link to the image if they use relative urls like ../myimage.jpg |
591
|
|
|
* |
592
|
|
|
* @param string $imageSrc |
593
|
|
|
* |
594
|
|
|
* @return string |
595
|
|
|
*/ |
596
|
|
|
private function buildImagePath($imageSrc) { |
597
|
|
|
$parts = array( |
598
|
|
|
'scheme', |
599
|
|
|
'host', |
600
|
|
|
'port', |
601
|
|
|
'path', |
602
|
|
|
'query', |
603
|
|
|
); |
604
|
|
|
|
605
|
|
|
$imageUrlParts = parse_url($imageSrc); |
606
|
|
|
$articleUrlParts = parse_url($this->article()->getFinalUrl()); |
607
|
|
|
if (isset($imageUrlParts['path'], $articleUrlParts['path']) && $imageUrlParts['path'] && $imageUrlParts['path']{0} !== '/') { |
608
|
|
|
$articleUrlDir = dirname($articleUrlParts['path']); |
609
|
|
|
$imageUrlParts['path'] = $articleUrlDir . '/' . $imageUrlParts['path']; |
610
|
|
|
} |
611
|
|
|
|
612
|
|
|
foreach ($parts as $part) { |
613
|
|
|
if (!isset($imageUrlParts[$part]) && isset($articleUrlParts[$part])) { |
614
|
|
|
$imageUrlParts[$part] = $articleUrlParts[$part]; |
615
|
|
|
|
616
|
|
|
} else if (isset($imageUrlParts[$part]) && !isset($articleUrlParts[$part])) { |
617
|
|
|
break; |
618
|
|
|
} |
619
|
|
|
} |
620
|
|
|
|
621
|
|
|
return http_build_url($imageUrlParts, array()); |
622
|
|
|
} |
623
|
|
|
|
624
|
|
|
/** |
625
|
|
|
* @param string[] |
626
|
|
|
*/ |
627
|
|
|
private function customSiteMapping() { |
628
|
|
|
if (empty(self::$CUSTOM_SITE_MAPPING)) { |
629
|
|
|
$file = __DIR__ . '/../../../resources/images/known-image-css.txt'; |
630
|
|
|
|
631
|
|
|
$lines = explode("\n", str_replace(["\r\n", "\r"], "\n", file_get_contents($file))); |
632
|
|
|
|
633
|
|
|
foreach ($lines as $line) { |
634
|
|
|
list($domain, $css) = explode('^', $line); |
635
|
|
|
|
636
|
|
|
self::$CUSTOM_SITE_MAPPING[$domain] = $css; |
637
|
|
|
} |
638
|
|
|
} |
639
|
|
|
|
640
|
|
|
return self::$CUSTOM_SITE_MAPPING; |
641
|
|
|
} |
642
|
|
|
|
643
|
|
|
} |
644
|
|
|
|
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.