diff options
Diffstat (limited to 'vendor/miniflux/picofeed/lib/PicoFeed/Parser/Parser.php')
-rw-r--r-- | vendor/miniflux/picofeed/lib/PicoFeed/Parser/Parser.php | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/vendor/miniflux/picofeed/lib/PicoFeed/Parser/Parser.php b/vendor/miniflux/picofeed/lib/PicoFeed/Parser/Parser.php new file mode 100644 index 00000000..3ee99f59 --- /dev/null +++ b/vendor/miniflux/picofeed/lib/PicoFeed/Parser/Parser.php @@ -0,0 +1,404 @@ +<?php + +namespace PicoFeed\Parser; + +use PicoFeed\Processor\ContentFilterProcessor; +use PicoFeed\Processor\ContentGeneratorProcessor; +use PicoFeed\Processor\ItemPostProcessor; +use PicoFeed\Processor\ScraperProcessor; +use SimpleXMLElement; +use PicoFeed\Client\Url; +use PicoFeed\Encoding\Encoding; +use PicoFeed\Filter\Filter; +use PicoFeed\Logging\Logger; + +/** + * Base parser class. + * + * @package PicoFeed\Parser + * @author Frederic Guillot + */ +abstract class Parser implements ParserInterface +{ + /** + * Config object. + * + * @var \PicoFeed\Config\Config + */ + private $config; + + /** + * DateParser object. + * + * @var \PicoFeed\Parser\DateParser + */ + private $dateParser; + + /** + * Hash algorithm used to generate item id, any value supported by PHP, see hash_algos(). + * + * @var string + */ + private $hash_algo = 'sha256'; + + /** + * Feed content (XML data). + * + * @var string + */ + protected $content = ''; + + /** + * Fallback url. + * + * @var string + */ + protected $fallback_url = ''; + + /** + * XML namespaces supported by parser. + * + * @var array + */ + protected $namespaces = array(); + + /** + * XML namespaces used in document. + * + * @var array + */ + protected $used_namespaces = array(); + + /** + * Item Post Processor instance + * + * @access private + * @var ItemPostProcessor + */ + private $itemPostProcessor; + + /** + * Constructor. + * + * @param string $content Feed content + * @param string $http_encoding HTTP encoding (headers) + * @param string $fallback_url Fallback url when the feed provide relative or broken url + */ + public function __construct($content, $http_encoding = '', $fallback_url = '') + { + $this->fallback_url = $fallback_url; + $xml_encoding = XmlParser::getEncodingFromXmlTag($content); + + // Strip XML tag to avoid multiple encoding/decoding in the next XML processing + $this->content = Filter::stripXmlTag($content); + + // Encode everything in UTF-8 + Logger::setMessage(get_called_class().': HTTP Encoding "'.$http_encoding.'" ; XML Encoding "'.$xml_encoding.'"'); + $this->content = Encoding::convert($this->content, $xml_encoding ?: $http_encoding); + + $this->itemPostProcessor = new ItemPostProcessor($this->config); + $this->itemPostProcessor->register(new ContentGeneratorProcessor($this->config)); + $this->itemPostProcessor->register(new ContentFilterProcessor($this->config)); + } + + /** + * Parse the document. + * + * @return \PicoFeed\Parser\Feed + */ + public function execute() + { + Logger::setMessage(get_called_class().': begin parsing'); + + $xml = XmlParser::getSimpleXml($this->content); + + if ($xml === false) { + Logger::setMessage(get_called_class().': Applying XML workarounds'); + $this->content = Filter::normalizeData($this->content); + $xml = XmlParser::getSimpleXml($this->content); + + if ($xml === false) { + Logger::setMessage(get_called_class().': XML parsing error'); + Logger::setMessage(XmlParser::getErrors()); + throw new MalformedXmlException('XML parsing error'); + } + } + + $this->used_namespaces = $xml->getNamespaces(true); + $xml = $this->registerSupportedNamespaces($xml); + + $feed = new Feed(); + + $this->findFeedUrl($xml, $feed); + $this->checkFeedUrl($feed); + + $this->findSiteUrl($xml, $feed); + $this->checkSiteUrl($feed); + + $this->findFeedTitle($xml, $feed); + $this->findFeedDescription($xml, $feed); + $this->findFeedLanguage($xml, $feed); + $this->findFeedId($xml, $feed); + $this->findFeedDate($xml, $feed); + $this->findFeedLogo($xml, $feed); + $this->findFeedIcon($xml, $feed); + + foreach ($this->getItemsTree($xml) as $entry) { + $entry = $this->registerSupportedNamespaces($entry); + + $item = new Item(); + $item->xml = $entry; + $item->namespaces = $this->used_namespaces; + + $this->findItemAuthor($xml, $entry, $item); + + $this->findItemUrl($entry, $item); + $this->checkItemUrl($feed, $item); + + $this->findItemTitle($entry, $item); + $this->findItemContent($entry, $item); + + // Id generation can use the item url/title/content (order is important) + $this->findItemId($entry, $item, $feed); + $this->findItemDate($entry, $item, $feed); + $this->findItemEnclosure($entry, $item, $feed); + $this->findItemLanguage($entry, $item, $feed); + $this->findItemCategories($entry, $item, $feed); + + $this->itemPostProcessor->execute($feed, $item); + $feed->items[] = $item; + } + + Logger::setMessage(get_called_class().PHP_EOL.$feed); + + return $feed; + } + + /** + * Check if the feed url is correct. + * + * @param Feed $feed Feed object + */ + public function checkFeedUrl(Feed $feed) + { + if ($feed->getFeedUrl() === '') { + $feed->feedUrl = $this->fallback_url; + } else { + $feed->feedUrl = Url::resolve($feed->getFeedUrl(), $this->fallback_url); + } + } + + /** + * Check if the site url is correct. + * + * @param Feed $feed Feed object + */ + public function checkSiteUrl(Feed $feed) + { + if ($feed->getSiteUrl() === '') { + $feed->siteUrl = Url::base($feed->getFeedUrl()); + } else { + $feed->siteUrl = Url::resolve($feed->getSiteUrl(), $this->fallback_url); + } + } + + /** + * Check if the item url is correct. + * + * @param Feed $feed Feed object + * @param Item $item Item object + */ + public function checkItemUrl(Feed $feed, Item $item) + { + $item->url = Url::resolve($item->getUrl(), $feed->getSiteUrl()); + } + + /** + * Find the item date. + * + * @param SimpleXMLElement $entry Feed item + * @param Item $item Item object + * @param \PicoFeed\Parser\Feed $feed Feed object + */ + public function findItemDate(SimpleXMLElement $entry, Item $item, Feed $feed) + { + $this->findItemPublishedDate($entry, $item, $feed); + $this->findItemUpdatedDate($entry, $item, $feed); + + if ($item->getPublishedDate() === null) { + // Use the updated date if available, otherwise use the feed date + $item->setPublishedDate($item->getUpdatedDate() ?: $feed->getDate()); + } + + if ($item->getUpdatedDate() === null) { + // Use the published date as fallback + $item->setUpdatedDate($item->getPublishedDate()); + } + + // Use the most recent of published and updated dates + $item->setDate(max($item->getPublishedDate(), $item->getUpdatedDate())); + } + + /** + * Get Item Post Processor instance + * + * @access public + * @return ItemPostProcessor + */ + public function getItemPostProcessor() + { + return $this->itemPostProcessor; + } + + /** + * Get DateParser instance + * + * @access public + * @return DateParser + */ + public function getDateParser() + { + if ($this->dateParser === null) { + $this->dateParser = new DateParser($this->config); + } + + return $this->dateParser; + } + + /** + * Generate a unique id for an entry (hash all arguments). + * + * @return string + */ + public function generateId() + { + return hash($this->hash_algo, implode(func_get_args())); + } + + /** + * Return true if the given language is "Right to Left". + * + * @static + * + * @param string $language Language: fr-FR, en-US + * + * @return bool + */ + public static function isLanguageRTL($language) + { + $language = strtolower($language); + + $rtl_languages = array( + 'ar', // Arabic (ar-**) + 'fa', // Farsi (fa-**) + 'ur', // Urdu (ur-**) + 'ps', // Pashtu (ps-**) + 'syr', // Syriac (syr-**) + 'dv', // Divehi (dv-**) + 'he', // Hebrew (he-**) + 'yi', // Yiddish (yi-**) + ); + + foreach ($rtl_languages as $prefix) { + if (strpos($language, $prefix) === 0) { + return true; + } + } + + return false; + } + + /** + * Set Hash algorithm used for id generation. + * + * @param string $algo Algorithm name + * @return \PicoFeed\Parser\Parser + */ + public function setHashAlgo($algo) + { + $this->hash_algo = $algo ?: $this->hash_algo; + return $this; + } + + /** + * Set config object. + * + * @param \PicoFeed\Config\Config $config Config instance + * + * @return \PicoFeed\Parser\Parser + */ + public function setConfig($config) + { + $this->config = $config; + $this->itemPostProcessor->setConfig($config); + return $this; + } + + /** + * Enable the content grabber. + * + * @return \PicoFeed\Parser\Parser + */ + public function disableContentFiltering() + { + $this->itemPostProcessor->unregister('PicoFeed\Processor\ContentFilterProcessor'); + return $this; + } + + /** + * Enable the content grabber. + * + * @param bool $needsRuleFile true if only pages with rule files should be + * scraped + * @param null|\Closure $scraperCallback Callback function that gets called for each + * scraper execution + * + * @return \PicoFeed\Parser\Parser + */ + public function enableContentGrabber($needsRuleFile = false, $scraperCallback = null) + { + $processor = new ScraperProcessor($this->config); + + if ($needsRuleFile) { + $processor->getScraper()->disableCandidateParser(); + } + + if ($scraperCallback !== null) { + $processor->setExecutionCallback($scraperCallback); + } + + $this->itemPostProcessor->register($processor); + return $this; + } + + /** + * Set ignored URLs for the content grabber. + * + * @param array $urls URLs + * + * @return \PicoFeed\Parser\Parser + */ + public function setGrabberIgnoreUrls(array $urls) + { + $this->itemPostProcessor->getProcessor('PicoFeed\Processor\ScraperProcessor')->ignoreUrls($urls); + return $this; + } + + /** + * Register all supported namespaces to be used within an xpath query. + * + * @param SimpleXMLElement $xml Feed xml + * + * @return SimpleXMLElement + */ + public function registerSupportedNamespaces(SimpleXMLElement $xml) + { + foreach ($this->namespaces as $prefix => $ns) { + $xml->registerXPathNamespace($prefix, $ns); + } + + return $xml; + } + + +} |