mirror of
https://github.com/wallabag/wallabag.git
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323 lines
10 KiB
PHP
323 lines
10 KiB
PHP
<?php
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namespace Wallabag\CoreBundle\Helper;
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use Graby\Graby;
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use Psr\Log\LoggerInterface as Logger;
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use Wallabag\CoreBundle\Entity\Entry;
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use Wallabag\CoreBundle\Entity\Tag;
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use Wallabag\CoreBundle\Tools\Utils;
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use Wallabag\CoreBundle\Repository\TagRepository;
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/**
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* This kind of proxy class take care of getting the content from an url
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* and update the entry with what it found.
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*/
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class ContentProxy
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{
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protected $graby;
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protected $tagger;
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protected $logger;
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protected $tagRepository;
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public function __construct(Graby $graby, RuleBasedTagger $tagger, TagRepository $tagRepository, Logger $logger)
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{
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$this->graby = $graby;
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$this->tagger = $tagger;
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$this->logger = $logger;
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$this->tagRepository = $tagRepository;
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}
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/**
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* Fetch content using graby and hydrate given entry with results information.
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* In case we couldn't find content, we'll try to use Open Graph data.
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*
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* We can also force the content, in case of an import from the v1 for example, so the function won't
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* fetch the content from the website but rather use information given with the $content parameter.
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*
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* @param Entry $entry Entry to update
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* @param string $url Url to grab content for
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* @param array $content An array with AT LEAST keys title, html, url, language & content_type to skip the fetchContent from the url
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*
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* @return Entry
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*/
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public function updateEntry(Entry $entry, $url, array $content = [])
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{
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// do we have to fetch the content or the provided one is ok?
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if (empty($content) || false === $this->validateContent($content)) {
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$content = $this->graby->fetchContent($url);
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}
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$title = $content['title'];
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if (!$title && isset($content['open_graph']['og_title'])) {
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$title = $content['open_graph']['og_title'];
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}
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$html = $content['html'];
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if (false === $html) {
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$html = '<p>Unable to retrieve readable content.</p>';
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if (isset($content['open_graph']['og_description'])) {
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$html .= '<p><i>But we found a short description: </i></p>';
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$html .= $content['open_graph']['og_description'];
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}
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}
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$entry->setUrl($content['url'] ?: $url);
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$entry->setTitle($title);
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$entry->setContent($html);
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$entry->setLanguage($content['language']);
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$entry->setMimetype($content['content_type']);
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$entry->setReadingTime(Utils::getReadingTime($html));
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$domainName = parse_url($entry->getUrl(), PHP_URL_HOST);
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if (false !== $domainName) {
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$entry->setDomainName($domainName);
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}
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if (isset($content['open_graph']['og_image'])) {
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$entry->setPreviewPicture($content['open_graph']['og_image']);
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}
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try {
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$this->tagger->tag($entry);
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} catch (\Exception $e) {
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$this->logger->error('Error while trying to automatically tag an entry.', [
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'entry_url' => $url,
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'error_msg' => $e->getMessage(),
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]);
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}
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return $entry;
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}
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/**
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* Assign some tags to an entry.
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*
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* @param Entry $entry
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* @param array|string $tags An array of tag or a string coma separated of tag
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* @param array $entitiesReady Entities from the EntityManager which are persisted but not yet flushed
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* It is mostly to fix duplicate tag on import @see http://stackoverflow.com/a/7879164/569101
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*/
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public function assignTagsToEntry(Entry $entry, $tags, array $entitiesReady = [])
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{
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if (!is_array($tags)) {
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$tags = explode(',', $tags);
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}
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// keeps only Tag entity from the "not yet flushed entities"
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$tagsNotYetFlushed = [];
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foreach ($entitiesReady as $entity) {
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if ($entity instanceof Tag) {
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$tagsNotYetFlushed[$entity->getLabel()] = $entity;
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}
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}
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foreach ($tags as $label) {
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$label = trim($label);
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// avoid empty tag
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if (0 === strlen($label)) {
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continue;
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}
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if (isset($tagsNotYetFlushed[$label])) {
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$tagEntity = $tagsNotYetFlushed[$label];
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} else {
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$tagEntity = $this->tagRepository->findOneByLabel($label);
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if (is_null($tagEntity)) {
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$tagEntity = new Tag();
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$tagEntity->setLabel($label);
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}
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}
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// only add the tag on the entry if the relation doesn't exist
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if (false === $entry->getTags()->contains($tagEntity)) {
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$entry->addTag($tagEntity);
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}
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}
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}
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/**
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* Validate that the given content as enough value to be used
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* instead of fetch the content from the url.
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*
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* @param array $content
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*
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* @return bool true if valid otherwise false
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*/
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private function validateContent(array $content)
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{
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return isset($content['title']) && isset($content['html']) && isset($content['url']) && isset($content['language']) && isset($content['content_type']);
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}
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/**
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* Changing pictures URL in article content.
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*/
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public static function filterPicture($content, $url, $id)
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{
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$matches = array();
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$processing_pictures = array(); // list of processing image to avoid processing the same pictures twice
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preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
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foreach ($matches as $i => $link) {
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$link[1] = trim($link[1]);
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if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1])) {
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$absolute_path = self::_getAbsoluteLink($link[2], $url);
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$filename = basename(parse_url($absolute_path, PHP_URL_PATH));
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$directory = self::_createAssetsDirectory($id);
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$fullpath = $directory.'/'.$filename;
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if (in_array($absolute_path, $processing_pictures) === true) {
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// replace picture's URL only if processing is OK : already processing -> go to next picture
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continue;
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}
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if (self::_downloadPictures($absolute_path, $fullpath) === true) {
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$content = str_replace($matches[$i][2], Tools::getPocheUrl().$fullpath, $content);
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}
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$processing_pictures[] = $absolute_path;
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}
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}
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return $content;
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}
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/**
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* Get absolute URL.
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*/
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private static function _getAbsoluteLink($relativeLink, $url)
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{
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/* return if already absolute URL */
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if (parse_url($relativeLink, PHP_URL_SCHEME) != '') {
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return $relativeLink;
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}
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/* queries and anchors */
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if ($relativeLink[0] == '#' || $relativeLink[0] == '?') {
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return $url.$relativeLink;
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}
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/* parse base URL and convert to local variables:
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$scheme, $host, $path */
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extract(parse_url($url));
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/* remove non-directory element from path */
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$path = preg_replace('#/[^/]*$#', '', $path);
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/* destroy path if relative url points to root */
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if ($relativeLink[0] == '/') {
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$path = '';
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}
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/* dirty absolute URL */
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$abs = $host.$path.'/'.$relativeLink;
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/* replace '//' or '/./' or '/foo/../' with '/' */
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$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
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for ($n = 1; $n > 0; $abs = preg_replace($re, '/', $abs, -1, $n)) {
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}
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/* absolute URL is ready! */
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return $scheme.'://'.$abs;
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}
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/**
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* Downloading pictures.
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*
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* @return bool true if the download and processing is OK, false else
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*/
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private static function _downloadPictures($absolute_path, $fullpath)
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{
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$rawdata = Tools::getFile($absolute_path);
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$fullpath = urldecode($fullpath);
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if (file_exists($fullpath)) {
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unlink($fullpath);
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}
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// check extension
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$file_ext = strrchr($fullpath, '.');
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$whitelist = array('.jpg', '.jpeg', '.gif', '.png');
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if (!(in_array($file_ext, $whitelist))) {
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Tools::logm('processed image with not allowed extension. Skipping '.$fullpath);
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return false;
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}
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// check headers
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$imageinfo = getimagesize($absolute_path);
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if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg' && $imageinfo['mime'] != 'image/jpg' && $imageinfo['mime'] != 'image/png') {
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Tools::logm('processed image with bad header. Skipping '.$fullpath);
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return false;
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}
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// regenerate image
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$im = imagecreatefromstring($rawdata);
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if ($im === false) {
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Tools::logm('error while regenerating image '.$fullpath);
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return false;
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}
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switch ($imageinfo['mime']) {
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case 'image/gif':
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$result = imagegif($im, $fullpath);
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break;
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case 'image/jpeg':
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case 'image/jpg':
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$result = imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY);
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break;
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case 'image/png':
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$result = imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9));
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break;
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}
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imagedestroy($im);
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return $result;
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}
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/**
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* Create a directory for an article.
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*
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* @param $id ID of the article
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*
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* @return string
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*/
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private static function _createAssetsDirectory($id)
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{
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$assets_path = ABS_PATH;
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if (!is_dir($assets_path)) {
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mkdir($assets_path, 0715);
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}
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$article_directory = $assets_path.$id;
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if (!is_dir($article_directory)) {
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mkdir($article_directory, 0715);
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}
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return $article_directory;
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}
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/**
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* Remove the directory.
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*
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* @param $directory
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*
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* @return bool
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*/
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public static function removeDirectory($directory)
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{
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if (is_dir($directory)) {
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$files = array_diff(scandir($directory), array('.', '..'));
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foreach ($files as $file) {
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(is_dir("$directory/$file")) ? self::removeDirectory("$directory/$file") : unlink("$directory/$file");
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}
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return rmdir($directory);
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}
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}
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}
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