315 lines
9.9 KiB
PHP
315 lines
9.9 KiB
PHP
<?php
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namespace PicoFeed\Parser;
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use SimpleXMLElement;
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use PicoFeed\Filter\Filter;
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use PicoFeed\Client\Url;
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/**
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* RSS 2.0 Parser
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*
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* @author Frederic Guillot
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* @package Parser
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*/
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class Rss20 extends Parser
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{
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/**
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* Supported namespaces
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*/
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protected $namespaces = array(
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'dc' => 'http://purl.org/dc/elements/1.1/',
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'content' => 'http://purl.org/rss/1.0/modules/content/',
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'feedburner' => 'http://rssnamespace.org/feedburner/ext/1.0',
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'atom' => 'http://www.w3.org/2005/Atom'
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);
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/**
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* Get the path to the items XML tree
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @return SimpleXMLElement
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*/
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public function getItemsTree(SimpleXMLElement $xml)
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{
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return XmlParser::getXPathResult($xml, 'channel/item');
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}
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/**
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* Find the feed url
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedUrl(SimpleXMLElement $xml, Feed $feed)
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{
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$feed->feed_url = '';
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}
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/**
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* Find the site url
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findSiteUrl(SimpleXMLElement $xml, Feed $feed)
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{
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$site_url = XmlParser::getXPathResult($xml, 'channel/link');
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$feed->site_url = (string) current($site_url);
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}
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/**
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* Find the feed description
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedDescription(SimpleXMLElement $xml, Feed $feed)
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{
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$description = XmlParser::getXPathResult($xml, 'channel/description');
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$feed->description = (string) current($description);
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}
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/**
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* Find the feed logo url
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedLogo(SimpleXMLElement $xml, Feed $feed)
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{
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$logo = XmlParser::getXPathResult($xml, 'channel/image/url');
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$feed->logo = (string) current($logo);
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}
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/**
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* Find the feed icon
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedIcon(SimpleXMLElement $xml, Feed $feed)
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{
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$feed->icon = '';
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}
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/**
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* Find the feed title
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedTitle(SimpleXMLElement $xml, Feed $feed)
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{
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$title = XmlParser::getXPathResult($xml, 'channel/title');
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$feed->title = Filter::stripWhiteSpace((string) current($title)) ?: $feed->getSiteUrl();
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}
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/**
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* Find the feed language
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedLanguage(SimpleXMLElement $xml, Feed $feed)
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{
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$language = XmlParser::getXPathResult($xml, 'channel/language');
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$feed->language = (string) current($language);
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}
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/**
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* Find the feed id
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedId(SimpleXMLElement $xml, Feed $feed)
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{
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$feed->id = $feed->getFeedUrl() ?: $feed->getSiteUrl();
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}
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/**
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* Find the feed date
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*
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* @access public
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* @param SimpleXMLElement $xml Feed xml
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findFeedDate(SimpleXMLElement $xml, Feed $feed)
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{
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$publish_date = XmlParser::getXPathResult($xml, 'channel/pubDate');
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$update_date = XmlParser::getXPathResult($xml, 'channel/lastBuildDate');
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$published = ! empty($publish_date) ? $this->date->getDateTime((string) current($publish_date)) : null;
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$updated = ! empty($update_date) ? $this->date->getDateTime((string) current($update_date)) : null;
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if ($published === null && $updated === null) {
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$feed->date = $this->date->getCurrentDateTime(); // We use the current date if there is no date for the feed
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}
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else if ($published !== null && $updated !== null) {
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$feed->date = max($published, $updated); // We use the most recent date between published and updated
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}
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else {
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$feed->date = $updated ?: $published;
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}
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}
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/**
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* Find the item date
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param Item $item Item object
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findItemDate(SimpleXMLElement $entry, Item $item, Feed $feed)
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{
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$date = XmlParser::getXPathResult($entry, 'pubDate');
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$item->date = empty($date) ? $feed->getDate() : $this->date->getDateTime((string) current($date));
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}
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/**
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* Find the item title
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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*/
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public function findItemTitle(SimpleXMLElement $entry, Item $item)
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{
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$title = XmlParser::getXPathResult($entry, 'title');
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$item->title = Filter::stripWhiteSpace((string) current($title)) ?: $item->url;
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}
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/**
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* Find the item author
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*
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* @access public
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* @param SimpleXMLElement $xml Feed
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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*/
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public function findItemAuthor(SimpleXMLElement $xml, SimpleXMLElement $entry, Item $item)
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{
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$author = XmlParser::getXPathResult($entry, 'dc:creator', $this->namespaces)
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?: XmlParser::getXPathResult($entry, 'author')
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?: XmlParser::getXPathResult($xml, 'channel/dc:creator', $this->namespaces)
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?: XmlParser::getXPathResult($xml, 'channel/managingEditor');
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$item->author = (string) current($author);
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}
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/**
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* Find the item content
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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*/
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public function findItemContent(SimpleXMLElement $entry, Item $item)
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{
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$content = XmlParser::getXPathResult($entry, 'content:encoded', $this->namespaces);
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if (trim((string) current($content)) === '') {
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$content = XmlParser::getXPathResult($entry, 'description');
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}
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$item->content = (string) current($content);
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}
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/**
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* Find the item URL
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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*/
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public function findItemUrl(SimpleXMLElement $entry, Item $item)
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{
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$link = XmlParser::getXPathResult($entry, 'feedburner:origLink', $this->namespaces)
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?: XmlParser::getXPathResult($entry, 'link')
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?: XmlParser::getXPathResult($entry, 'atom:link/@href', $this->namespaces);
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if (! empty($link)) {
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$item->url = trim((string) current($link));
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}
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else {
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$link = XmlParser::getXPathResult($entry, 'guid');
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$link = trim((string) current($link));
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if (filter_var($link, FILTER_VALIDATE_URL) !== false) {
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$item->url = $link;
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}
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}
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}
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/**
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* Genereate the item id
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findItemId(SimpleXMLElement $entry, Item $item, Feed $feed)
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{
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$id = (string) current(XmlParser::getXPathResult($entry, 'guid'));
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if ($id) {
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$item->id = $this->generateId($id);
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}
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else {
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$item->id = $this->generateId(
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$item->getTitle(), $item->getUrl(), $item->getContent()
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);
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}
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}
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/**
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* Find the item enclosure
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findItemEnclosure(SimpleXMLElement $entry, Item $item, Feed $feed)
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{
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if (isset($entry->enclosure)) {
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$enclosure_url = XmlParser::getXPathResult($entry, 'feedburner:origEnclosureLink', $this->namespaces)
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?: XmlParser::getXPathResult($entry, 'enclosure/@url');
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$enclosure_type = XmlParser::getXPathResult($entry, 'enclosure/@type');
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$item->enclosure_url = Url::resolve((string) current($enclosure_url), $feed->getSiteUrl());
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$item->enclosure_type = (string) current($enclosure_type);
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}
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}
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/**
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* Find the item language
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*
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* @access public
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* @param SimpleXMLElement $entry Feed item
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* @param \PicoFeed\Parser\Item $item Item object
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* @param \PicoFeed\Parser\Feed $feed Feed object
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*/
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public function findItemLanguage(SimpleXMLElement $entry, Item $item, Feed $feed)
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{
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$language = XmlParser::getXPathResult($entry, 'dc:language', $this->namespaces);
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$item->language = (string) current($language) ?: $feed->language;
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}
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}
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