325 lines
8.7 KiB
PHP
325 lines
8.7 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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* Atom 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 Atom extends Parser
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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 $xml->entry;
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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 = $this->getUrl($xml, 'self');
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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 $feed)
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{
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$feed->site_url = $this->getUrl($xml, 'alternate', true);
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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 $feed)
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{
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$feed->description = (string) $xml->subtitle;
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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 $feed)
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{
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$feed->logo = (string) $xml->logo;
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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 $feed)
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{
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$feed->title = Filter::stripWhiteSpace((string) $xml->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 $feed)
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{
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$feed->language = XmlParser::getXmlLang($this->content);
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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 = (string) $xml->id;
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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 $feed)
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{
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$feed->date = $this->parseDate((string) $xml->updated);
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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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*/
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public function findItemDate(SimpleXMLElement $entry, Item $item)
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{
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$published = isset($entry->published) ? $this->parseDate((string) $entry->published) : 0;
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$updated = isset($entry->updated) ? $this->parseDate((string) $entry->updated) : 0;
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$item->date = max($published, $updated) ?: time();
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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 Item $item Item object
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*/
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public function findItemTitle(SimpleXMLElement $entry, Item $item)
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{
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$item->title = Filter::stripWhiteSpace((string) $entry->title);
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if (empty($item->title)) {
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$item->title = $item->url;
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}
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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 $item)
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{
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if (isset($entry->author->name)) {
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$item->author = (string) $entry->author->name;
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}
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else {
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$item->author = (string) $xml->author->name;
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}
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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 $item)
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{
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$item->content = $this->getContent($entry);
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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 $item)
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{
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$item->url = $this->getUrl($entry, 'alternate', true);
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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) $entry->id;
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if ($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 $feed)
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{
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$enclosure = $this->findLink($entry, 'enclosure');
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if ($enclosure) {
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$item->enclosure_url = Url::resolve((string) $enclosure['href'], $feed->getSiteUrl());
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$item->enclosure_type = (string) $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 = (string) $entry->attributes('xml', true)->{'lang'};
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if ($language === '') {
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$language = $feed->language;
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}
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$item->language = $language;
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}
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/**
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* Get the URL from a link tag
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*
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* @access private
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* @param SimpleXMLElement $xml XML tag
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* @param string $rel Link relationship: alternate, enclosure, related, self, via
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* @return string
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*/
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private function getUrl(SimpleXMLElement $xml, $rel, $fallback = false)
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{
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$link = $this->findLink($xml, $rel);
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if ($link) {
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return (string) $link['href'];
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}
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if ($fallback) {
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$link = $this->findLink($xml, '');
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return $link ? (string) $link['href'] : '';
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}
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return '';
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}
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/**
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* Get a link tag that match a relationship
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*
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* @access private
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* @param SimpleXMLElement $xml XML tag
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* @param string $rel Link relationship: alternate, enclosure, related, self, via
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* @return SimpleXMLElement|null
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*/
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private function findLink(SimpleXMLElement $xml, $rel)
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{
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foreach ($xml->link as $link) {
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if ($rel === (string) $link['rel']) {
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return $link;
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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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* Get the entry content
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*
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* @access private
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* @param SimpleXMLElement $entry XML Entry
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* @return string
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*/
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private function getContent(SimpleXMLElement $entry)
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{
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if (isset($entry->content) && ! empty($entry->content)) {
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if (count($entry->content->children())) {
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return (string) $entry->content->asXML();
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}
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else {
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return (string) $entry->content;
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}
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}
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else if (isset($entry->summary) && ! empty($entry->summary)) {
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return (string) $entry->summary;
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}
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return '';
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}
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}
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