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<?php
declare(strict_types=1);
namespace Laminas\Feed\Reader\Feed;
use DateTime;
use DOMDocument;
use Laminas\Feed\Reader;
use Laminas\Feed\Reader\Collection;
use Laminas\Feed\Reader\Exception;
use function array_key_exists;
use function array_unique;
use function count;
use function is_array;
use function preg_match;
use function strtotime;
use function trim;
/** @template-extends AbstractFeed<Reader\Entry\Rss> */
class Rss extends AbstractFeed
{
/**
* @param null|string $type
*/
public function __construct(DOMDocument $dom, $type = null)
{
parent::__construct($dom, $type);
$manager = Reader\Reader::getExtensionManager();
$feed = $manager->get('DublinCore\Feed');
$feed->setDomDocument($dom);
$feed->setType($this->data['type']);
$feed->setXpath($this->xpath);
$this->extensions['DublinCore\Feed'] = $feed;
$feed = $manager->get('Atom\Feed');
$feed->setDomDocument($dom);
$feed->setType($this->data['type']);
$feed->setXpath($this->xpath);
$this->extensions['Atom\Feed'] = $feed;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$xpathPrefix = '/rss/channel';
} else {
$xpathPrefix = '/rdf:RDF/rss:channel';
}
foreach ($this->extensions as $extension) {
$extension->setXpathPrefix($xpathPrefix);
}
}
/**
* Get a single author
*
* @param int $index
* @return null|array<string, string>
*/
public function getAuthor($index = 0)
{
$authors = $this->getAuthors();
return isset($authors[$index]) && is_array($authors[$index])
? $authors[$index]
: null;
}
/**
* Get an array with feed authors
*
* @return array
*/
public function getAuthors()
{
if (array_key_exists('authors', $this->data)) {
return $this->data['authors'];
}
$authors = [];
$authorsDc = $this->getExtension('DublinCore')->getAuthors();
if (! empty($authorsDc)) {
foreach ($authorsDc as $author) {
$authors[] = [
'name' => $author['name'],
];
}
}
/**
* Technically RSS doesn't specific author element use at the feed level
* but it's supported on a "just in case" basis.
*/
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$list = $this->xpath->query('//author');
} else {
$list = $this->xpath->query('//rss:author');
}
if ($list->length) {
foreach ($list as $author) {
$string = trim($author->nodeValue);
$data = [];
// Pretty rough parsing - but it's a catchall
if (preg_match('/^.*@[^ ]*/', $string, $matches)) {
$data['email'] = trim($matches[0]);
if (preg_match('/\((.*)\)$/', $string, $matches)) {
$data['name'] = $matches[1];
}
$authors[] = $data;
}
}
}
if (count($authors) === 0) {
$authors = $this->getExtension('Atom')->getAuthors();
} else {
$authors = new Reader\Collection\Author(
Reader\Reader::arrayUnique($authors)
);
}
if (count($authors) === 0) {
$authors = null;
}
$this->data['authors'] = $authors;
return $this->data['authors'];
}
/**
* Get the copyright entry
*
* @return null|string
*/
public function getCopyright()
{
if (array_key_exists('copyright', $this->data)) {
return $this->data['copyright'];
}
$copyright = null;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$copyright = $this->xpath->evaluate('string(/rss/channel/copyright)');
}
if (! $copyright && $this->getExtension('DublinCore') !== null) {
$copyright = $this->getExtension('DublinCore')->getCopyright();
}
if (empty($copyright)) {
$copyright = $this->getExtension('Atom')->getCopyright();
}
if (! $copyright) {
$copyright = null;
}
$this->data['copyright'] = $copyright;
return $this->data['copyright'];
}
/**
* Get the feed creation date
*
* @return null|DateTime
*/
public function getDateCreated()
{
return $this->getDateModified();
}
/**
* Get the feed modification date
*
* @return DateTime
* @throws Exception\RuntimeException
*/
public function getDateModified()
{
if (array_key_exists('datemodified', $this->data)) {
return $this->data['datemodified'];
}
$date = null;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$dateModified = $this->xpath->evaluate('string(/rss/channel/pubDate)');
if (! $dateModified) {
$dateModified = $this->xpath->evaluate('string(/rss/channel/lastBuildDate)');
}
if ($dateModified) {
$dateModifiedParsed = strtotime($dateModified);
if ($dateModifiedParsed) {
$date = new DateTime('@' . $dateModifiedParsed);
} else {
$dateStandards = [
DateTime::RSS,
DateTime::RFC822,
DateTime::RFC2822,
];
foreach ($dateStandards as $standard) {
$date = DateTime::createFromFormat(
$standard,
$dateModified
);
if ($date instanceof DateTime) {
break;
}
}
if (! $date) {
throw new Exception\RuntimeException(
'Could not load date due to unrecognised'
. ' format (should follow RFC 822 or 2822).'
);
}
}
}
}
if (! $date) {
$date = $this->getExtension('DublinCore')->getDate();
}
if (! $date) {
$date = $this->getExtension('Atom')->getDateModified();
}
if (! $date) {
$date = null;
}
$this->data['datemodified'] = $date;
return $this->data['datemodified'];
}
/**
* Get the feed lastBuild date
*
* @return DateTime
* @throws Exception\RuntimeException
*/
public function getLastBuildDate()
{
if (array_key_exists('lastBuildDate', $this->data)) {
return $this->data['lastBuildDate'];
}
$date = null;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$lastBuildDate = $this->xpath->evaluate('string(/rss/channel/lastBuildDate)');
if ($lastBuildDate) {
$lastBuildDateParsed = strtotime($lastBuildDate);
if ($lastBuildDateParsed) {
$date = new DateTime('@' . $lastBuildDateParsed);
} else {
$dateStandards = [
DateTime::RSS,
DateTime::RFC822,
DateTime::RFC2822,
null,
];
foreach ($dateStandards as $standard) {
try {
$date = DateTime::createFromFormat($standard, $lastBuildDateParsed);
break;
} catch (\Exception $e) {
if ($standard === null) {
throw new Exception\RuntimeException(
'Could not load date due to unrecognised format'
. ' (should follow RFC 822 or 2822): ' . $e->getMessage(),
0,
$e
);
}
}
}
}
}
}
if (! $date) {
$date = null;
}
$this->data['lastBuildDate'] = $date;
return $this->data['lastBuildDate'];
}
/**
* Get the feed description
*
* @return null|string
*/
public function getDescription()
{
if (array_key_exists('description', $this->data)) {
return $this->data['description'];
}
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$description = $this->xpath->evaluate('string(/rss/channel/description)');
} else {
$description = $this->xpath->evaluate('string(/rdf:RDF/rss:channel/rss:description)');
}
if (! $description && $this->getExtension('DublinCore') !== null) {
$description = $this->getExtension('DublinCore')->getDescription();
}
if (empty($description)) {
$description = $this->getExtension('Atom')->getDescription();
}
if (! $description) {
$description = null;
}
$this->data['description'] = $description;
return $this->data['description'];
}
/**
* Get the feed ID
*
* @return null|string
*/
public function getId()
{
if (array_key_exists('id', $this->data)) {
return $this->data['id'];
}
$id = null;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$id = $this->xpath->evaluate('string(/rss/channel/guid)');
}
if (! $id && $this->getExtension('DublinCore') !== null) {
$id = $this->getExtension('DublinCore')->getId();
}
if (empty($id)) {
$id = $this->getExtension('Atom')->getId();
}
if (! $id) {
if ($this->getLink()) {
$id = $this->getLink();
} elseif ($this->getTitle()) {
$id = $this->getTitle();
} else {
$id = null;
}
}
$this->data['id'] = $id;
return $this->data['id'];
}
/**
* Get the feed image data
*
* @return null|array
*/
public function getImage()
{
if (array_key_exists('image', $this->data)) {
return $this->data['image'];
}
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$list = $this->xpath->query('/rss/channel/image');
$prefix = '/rss/channel/image[1]';
} else {
$list = $this->xpath->query('/rdf:RDF/rss:channel/rss:image');
$prefix = '/rdf:RDF/rss:channel/rss:image[1]';
}
if ($list->length > 0) {
$image = [];
$value = $this->xpath->evaluate('string(' . $prefix . '/url)');
if ($value) {
$image['uri'] = $value;
}
$value = $this->xpath->evaluate('string(' . $prefix . '/link)');
if ($value) {
$image['link'] = $value;
}
$value = $this->xpath->evaluate('string(' . $prefix . '/title)');
if ($value) {
$image['title'] = $value;
}
$value = $this->xpath->evaluate('string(' . $prefix . '/height)');
if ($value) {
$image['height'] = $value;
}
$value = $this->xpath->evaluate('string(' . $prefix . '/width)');
if ($value) {
$image['width'] = $value;
}
$value = $this->xpath->evaluate('string(' . $prefix . '/description)');
if ($value) {
$image['description'] = $value;
}
} else {
$image = null;
}
$this->data['image'] = $image;
return $this->data['image'];
}
/**
* Get the feed language
*
* @return null|string
*/
public function getLanguage()
{
if (array_key_exists('language', $this->data)) {
return $this->data['language'];
}
$language = null;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$language = $this->xpath->evaluate('string(/rss/channel/language)');
}
if (! $language && $this->getExtension('DublinCore') !== null) {
$language = $this->getExtension('DublinCore')->getLanguage();
}
if (empty($language)) {
$language = $this->getExtension('Atom')->getLanguage();
}
if (! $language) {
$language = $this->xpath->evaluate('string(//@xml:lang[1])');
}
if (! $language) {
$language = null;
}
$this->data['language'] = $language;
return $this->data['language'];
}
/**
* Get a link to the feed
*
* @return null|string
*/
public function getLink()
{
if (array_key_exists('link', $this->data)) {
return $this->data['link'];
}
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$link = $this->xpath->evaluate('string(/rss/channel/link)');
} else {
$link = $this->xpath->evaluate('string(/rdf:RDF/rss:channel/rss:link)');
}
if (empty($link)) {
$link = $this->getExtension('Atom')->getLink();
}
if (! $link) {
$link = null;
}
$this->data['link'] = $link;
return $this->data['link'];
}
/**
* Get a link to the feed XML
*
* @return null|string
*/
public function getFeedLink()
{
if (array_key_exists('feedlink', $this->data)) {
return $this->data['feedlink'];
}
$link = $this->getExtension('Atom')->getFeedLink();
if ($link === null || empty($link)) {
$link = $this->getOriginalSourceUri();
}
$this->data['feedlink'] = $link;
return $this->data['feedlink'];
}
/**
* Get the feed generator entry
*
* @return null|string
*/
public function getGenerator()
{
if (array_key_exists('generator', $this->data)) {
return $this->data['generator'];
}
$generator = null;
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$generator = $this->xpath->evaluate('string(/rss/channel/generator)');
}
if (! $generator) {
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$generator = $this->xpath->evaluate('string(/rss/channel/atom:generator)');
} else {
$generator = $this->xpath->evaluate('string(/rdf:RDF/rss:channel/atom:generator)');
}
}
if (empty($generator)) {
$generator = $this->getExtension('Atom')->getGenerator();
}
if (! $generator) {
$generator = null;
}
$this->data['generator'] = $generator;
return $this->data['generator'];
}
/**
* Get the feed title
*
* @return null|string
*/
public function getTitle()
{
if (array_key_exists('title', $this->data)) {
return $this->data['title'];
}
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$title = $this->xpath->evaluate('string(/rss/channel/title)');
} else {
$title = $this->xpath->evaluate('string(/rdf:RDF/rss:channel/rss:title)');
}
if (! $title && $this->getExtension('DublinCore') !== null) {
$title = $this->getExtension('DublinCore')->getTitle();
}
if (! $title) {
$title = $this->getExtension('Atom')->getTitle();
}
if (! $title) {
$title = null;
}
$this->data['title'] = $title;
return $this->data['title'];
}
/**
* Get an array of any supported Pusubhubbub endpoints
*
* @return null|array
*/
public function getHubs()
{
if (array_key_exists('hubs', $this->data)) {
return $this->data['hubs'];
}
$hubs = $this->getExtension('Atom')->getHubs();
if (empty($hubs)) {
$hubs = null;
} else {
$hubs = array_unique($hubs);
}
$this->data['hubs'] = $hubs;
return $this->data['hubs'];
}
/**
* Get all categories
*
* @return Reader\Collection\Category
*/
public function getCategories()
{
if (array_key_exists('categories', $this->data)) {
return $this->data['categories'];
}
if (
$this->getType() !== Reader\Reader::TYPE_RSS_10
&& $this->getType() !== Reader\Reader::TYPE_RSS_090
) {
$list = $this->xpath->query('/rss/channel//category');
} else {
$list = $this->xpath->query('/rdf:RDF/rss:channel//rss:category');
}
if ($list->length) {
$categoryCollection = new Collection\Category();
foreach ($list as $category) {
$categoryCollection[] = [
'term' => $category->nodeValue,
'scheme' => $category->getAttribute('domain'),
'label' => $category->nodeValue,
];
}
} else {
$categoryCollection = $this->getExtension('DublinCore')->getCategories();
}
if (count($categoryCollection) === 0) {
$categoryCollection = $this->getExtension('Atom')->getCategories();
}
$this->data['categories'] = $categoryCollection;
return $this->data['categories'];
}
/**
* Read all entries to the internal entries array
*
* @return void
*/
protected function indexEntries()
{
if ($this->getType() !== Reader\Reader::TYPE_RSS_10 && $this->getType() !== Reader\Reader::TYPE_RSS_090) {
$entries = $this->xpath->evaluate('//item');
} else {
$entries = $this->xpath->evaluate('//rss:item');
}
foreach ($entries as $index => $entry) {
$this->entries[$index] = $entry;
}
}
/**
* Register the default namespaces for the current feed format
*
* @return void
*/
protected function registerNamespaces()
{
switch ($this->data['type']) {
case Reader\Reader::TYPE_RSS_10:
$this->xpath->registerNamespace('rdf', Reader\Reader::NAMESPACE_RDF);
$this->xpath->registerNamespace('rss', Reader\Reader::NAMESPACE_RSS_10);
break;
case Reader\Reader::TYPE_RSS_090:
$this->xpath->registerNamespace('rdf', Reader\Reader::NAMESPACE_RDF);
$this->xpath->registerNamespace('rss', Reader\Reader::NAMESPACE_RSS_090);
break;
}
}
}