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torrentpier-lts/library/Zend/Feed/Reader/Extension/Atom/Entry.php

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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Feed\Reader\Extension\Atom;
use DateTime;
use DOMDocument;
use DOMElement;
use stdClass;
use Zend\Feed\Reader;
use Zend\Feed\Reader\Collection;
use Zend\Feed\Reader\Extension;
use Zend\Feed\Uri;
class Entry extends Extension\AbstractEntry
{
/**
* Get the specified author
*
* @param int $index
* @return string|null
*/
public function getAuthor($index = 0)
{
$authors = $this->getAuthors();
if (isset($authors[$index])) {
return $authors[$index];
}
return;
}
/**
* Get an array with feed authors
*
* @return Collection\Author
*/
public function getAuthors()
{
if (array_key_exists('authors', $this->data)) {
return $this->data['authors'];
}
$authors = array();
$list = $this->getXpath()->query($this->getXpathPrefix() . '//atom:author');
if (!$list->length) {
/**
* TODO: Limit query to feed level els only!
*/
$list = $this->getXpath()->query('//atom:author');
}
if ($list->length) {
foreach ($list as $author) {
$author = $this->getAuthorFromElement($author);
if (!empty($author)) {
$authors[] = $author;
}
}
}
if (count($authors) == 0) {
$authors = new Collection\Author();
} else {
$authors = new Collection\Author(
Reader\Reader::arrayUnique($authors)
);
}
$this->data['authors'] = $authors;
return $this->data['authors'];
}
/**
* Get the entry content
*
* @return string
*/
public function getContent()
{
if (array_key_exists('content', $this->data)) {
return $this->data['content'];
}
$content = null;
$el = $this->getXpath()->query($this->getXpathPrefix() . '/atom:content');
if ($el->length > 0) {
$el = $el->item(0);
$type = $el->getAttribute('type');
switch ($type) {
case '':
case 'text':
case 'text/plain':
case 'html':
case 'text/html':
$content = $el->nodeValue;
break;
case 'xhtml':
$this->getXpath()->registerNamespace('xhtml', 'http://www.w3.org/1999/xhtml');
$xhtml = $this->getXpath()->query(
$this->getXpathPrefix() . '/atom:content/xhtml:div'
)->item(0);
$d = new DOMDocument('1.0', $this->getEncoding());
$deep = version_compare(PHP_VERSION, '7', 'ge') ? 1 : true;
$xhtmls = $d->importNode($xhtml, $deep);
$d->appendChild($xhtmls);
$content = $this->collectXhtml(
$d->saveXML(),
$d->lookupPrefix('http://www.w3.org/1999/xhtml')
);
break;
}
}
if (!$content) {
$content = $this->getDescription();
}
$this->data['content'] = trim($content);
return $this->data['content'];
}
/**
* Parse out XHTML to remove the namespacing
*
* @param $xhtml
* @param $prefix
* @return mixed
*/
protected function collectXhtml($xhtml, $prefix)
{
if (!empty($prefix)) {
$prefix = $prefix . ':';
}
$matches = array(
"/<\?xml[^<]*>[^<]*<" . $prefix . "div[^<]*/",
"/<\/" . $prefix . "div>\s*$/"
);
$xhtml = preg_replace($matches, '', $xhtml);
if (!empty($prefix)) {
$xhtml = preg_replace("/(<[\/]?)" . $prefix . "([a-zA-Z]+)/", '$1$2', $xhtml);
}
return $xhtml;
}
/**
* Get the entry creation date
*
* @return string
*/
public function getDateCreated()
{
if (array_key_exists('datecreated', $this->data)) {
return $this->data['datecreated'];
}
$date = null;
if ($this->getAtomType() === Reader\Reader::TYPE_ATOM_03) {
$dateCreated = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:created)');
} else {
$dateCreated = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:published)');
}
if ($dateCreated) {
$date = new DateTime($dateCreated);
}
$this->data['datecreated'] = $date;
return $this->data['datecreated'];
}
/**
* Get the entry modification date
*
* @return string
*/
public function getDateModified()
{
if (array_key_exists('datemodified', $this->data)) {
return $this->data['datemodified'];
}
$date = null;
if ($this->getAtomType() === Reader\Reader::TYPE_ATOM_03) {
$dateModified = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:modified)');
} else {
$dateModified = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:updated)');
}
if ($dateModified) {
$date = new DateTime($dateModified);
}
$this->data['datemodified'] = $date;
return $this->data['datemodified'];
}
/**
* Get the entry description
*
* @return string
*/
public function getDescription()
{
if (array_key_exists('description', $this->data)) {
return $this->data['description'];
}
$description = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:summary)');
if (!$description) {
$description = null;
}
$this->data['description'] = $description;
return $this->data['description'];
}
/**
* Get the entry enclosure
*
* @return string
*/
public function getEnclosure()
{
if (array_key_exists('enclosure', $this->data)) {
return $this->data['enclosure'];
}
$enclosure = null;
$nodeList = $this->getXpath()->query($this->getXpathPrefix() . '/atom:link[@rel="enclosure"]');
if ($nodeList->length > 0) {
$enclosure = new stdClass();
$enclosure->url = $nodeList->item(0)->getAttribute('href');
$enclosure->length = $nodeList->item(0)->getAttribute('length');
$enclosure->type = $nodeList->item(0)->getAttribute('type');
}
$this->data['enclosure'] = $enclosure;
return $this->data['enclosure'];
}
/**
* Get the entry ID
*
* @return string
*/
public function getId()
{
if (array_key_exists('id', $this->data)) {
return $this->data['id'];
}
$id = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:id)');
if (!$id) {
if ($this->getPermalink()) {
$id = $this->getPermalink();
} elseif ($this->getTitle()) {
$id = $this->getTitle();
} else {
$id = null;
}
}
$this->data['id'] = $id;
return $this->data['id'];
}
/**
* Get the base URI of the feed (if set).
*
* @return string|null
*/
public function getBaseUrl()
{
if (array_key_exists('baseUrl', $this->data)) {
return $this->data['baseUrl'];
}
$baseUrl = $this->getXpath()->evaluate(
'string('
. $this->getXpathPrefix()
. '/@xml:base[1]'
. ')'
);
if (!$baseUrl) {
$baseUrl = $this->getXpath()->evaluate('string(//@xml:base[1])');
}
if (!$baseUrl) {
$baseUrl = null;
}
$this->data['baseUrl'] = $baseUrl;
return $this->data['baseUrl'];
}
/**
* Get a specific link
*
* @param int $index
* @return string
*/
public function getLink($index = 0)
{
if (!array_key_exists('links', $this->data)) {
$this->getLinks();
}
if (isset($this->data['links'][$index])) {
return $this->data['links'][$index];
}
return;
}
/**
* Get all links
*
* @return array
*/
public function getLinks()
{
if (array_key_exists('links', $this->data)) {
return $this->data['links'];
}
$links = array();
$list = $this->getXpath()->query(
$this->getXpathPrefix() . '//atom:link[@rel="alternate"]/@href' . '|' .
$this->getXpathPrefix() . '//atom:link[not(@rel)]/@href'
);
if ($list->length) {
foreach ($list as $link) {
$links[] = $this->absolutiseUri($link->value);
}
}
$this->data['links'] = $links;
return $this->data['links'];
}
/**
* Get a permalink to the entry
*
* @return string
*/
public function getPermalink()
{
return $this->getLink(0);
}
/**
* Get the entry title
*
* @return string
*/
public function getTitle()
{
if (array_key_exists('title', $this->data)) {
return $this->data['title'];
}
$title = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:title)');
if (!$title) {
$title = null;
}
$this->data['title'] = $title;
return $this->data['title'];
}
/**
* Get the number of comments/replies for current entry
*
* @return int
*/
public function getCommentCount()
{
if (array_key_exists('commentcount', $this->data)) {
return $this->data['commentcount'];
}
$count = null;
$this->getXpath()->registerNamespace('thread10', 'http://purl.org/syndication/thread/1.0');
$list = $this->getXpath()->query(
$this->getXpathPrefix() . '//atom:link[@rel="replies"]/@thread10:count'
);
if ($list->length) {
$count = $list->item(0)->value;
}
$this->data['commentcount'] = $count;
return $this->data['commentcount'];
}
/**
* Returns a URI pointing to the HTML page where comments can be made on this entry
*
* @return string
*/
public function getCommentLink()
{
if (array_key_exists('commentlink', $this->data)) {
return $this->data['commentlink'];
}
$link = null;
$list = $this->getXpath()->query(
$this->getXpathPrefix() . '//atom:link[@rel="replies" and @type="text/html"]/@href'
);
if ($list->length) {
$link = $list->item(0)->value;
$link = $this->absolutiseUri($link);
}
$this->data['commentlink'] = $link;
return $this->data['commentlink'];
}
/**
* Returns a URI pointing to a feed of all comments for this entry
*
* @param string $type
* @return string
*/
public function getCommentFeedLink($type = 'atom')
{
if (array_key_exists('commentfeedlink', $this->data)) {
return $this->data['commentfeedlink'];
}
$link = null;
$list = $this->getXpath()->query(
$this->getXpathPrefix() . '//atom:link[@rel="replies" and @type="application/' . $type.'+xml"]/@href'
);
if ($list->length) {
$link = $list->item(0)->value;
$link = $this->absolutiseUri($link);
}
$this->data['commentfeedlink'] = $link;
return $this->data['commentfeedlink'];
}
/**
* Get all categories
*
* @return Collection\Category
*/
public function getCategories()
{
if (array_key_exists('categories', $this->data)) {
return $this->data['categories'];
}
if ($this->getAtomType() == Reader\Reader::TYPE_ATOM_10) {
$list = $this->getXpath()->query($this->getXpathPrefix() . '//atom:category');
} else {
/**
* Since Atom 0.3 did not support categories, it would have used the
* Dublin Core extension. However there is a small possibility Atom 0.3
* may have been retrofitted to use Atom 1.0 instead.
*/
$this->getXpath()->registerNamespace('atom10', Reader\Reader::NAMESPACE_ATOM_10);
$list = $this->getXpath()->query($this->getXpathPrefix() . '//atom10:category');
}
if ($list->length) {
$categoryCollection = new Collection\Category;
foreach ($list as $category) {
$categoryCollection[] = array(
'term' => $category->getAttribute('term'),
'scheme' => $category->getAttribute('scheme'),
'label' => $category->getAttribute('label')
);
}
} else {
return new Collection\Category;
}
$this->data['categories'] = $categoryCollection;
return $this->data['categories'];
}
/**
* Get source feed metadata from the entry
*
* @return Reader\Feed\Atom\Source|null
*/
public function getSource()
{
if (array_key_exists('source', $this->data)) {
return $this->data['source'];
}
$source = null;
// TODO: Investigate why _getAtomType() fails here. Is it even needed?
if ($this->getType() == Reader\Reader::TYPE_ATOM_10) {
$list = $this->getXpath()->query($this->getXpathPrefix() . '/atom:source[1]');
if ($list->length) {
$element = $list->item(0);
$source = new Reader\Feed\Atom\Source($element, $this->getXpathPrefix());
}
}
$this->data['source'] = $source;
return $this->data['source'];
}
/**
* Attempt to absolutise the URI, i.e. if a relative URI apply the
* xml:base value as a prefix to turn into an absolute URI.
*
* @param $link
* @return string
*/
protected function absolutiseUri($link)
{
if (!Uri::factory($link)->isAbsolute()) {
if ($this->getBaseUrl() !== null) {
$link = $this->getBaseUrl() . $link;
if (!Uri::factory($link)->isValid()) {
$link = null;
}
}
}
return $link;
}
/**
* Get an author entry
*
* @param DOMElement $element
* @return string
*/
protected function getAuthorFromElement(DOMElement $element)
{
$author = array();
$emailNode = $element->getElementsByTagName('email');
$nameNode = $element->getElementsByTagName('name');
$uriNode = $element->getElementsByTagName('uri');
if ($emailNode->length && strlen($emailNode->item(0)->nodeValue) > 0) {
$author['email'] = $emailNode->item(0)->nodeValue;
}
if ($nameNode->length && strlen($nameNode->item(0)->nodeValue) > 0) {
$author['name'] = $nameNode->item(0)->nodeValue;
}
if ($uriNode->length && strlen($uriNode->item(0)->nodeValue) > 0) {
$author['uri'] = $uriNode->item(0)->nodeValue;
}
if (empty($author)) {
return;
}
return $author;
}
/**
* Register the default namespaces for the current feed format
*/
protected function registerNamespaces()
{
switch ($this->getAtomType()) {
case Reader\Reader::TYPE_ATOM_03:
$this->getXpath()->registerNamespace('atom', Reader\Reader::NAMESPACE_ATOM_03);
break;
default:
$this->getXpath()->registerNamespace('atom', Reader\Reader::NAMESPACE_ATOM_10);
break;
}
}
/**
* Detect the presence of any Atom namespaces in use
*
* @return string
*/
protected function getAtomType()
{
$dom = $this->getDomDocument();
$prefixAtom03 = $dom->lookupPrefix(Reader\Reader::NAMESPACE_ATOM_03);
$prefixAtom10 = $dom->lookupPrefix(Reader\Reader::NAMESPACE_ATOM_10);
if ($dom->isDefaultNamespace(Reader\Reader::NAMESPACE_ATOM_03)
|| !empty($prefixAtom03)) {
return Reader\Reader::TYPE_ATOM_03;
}
if ($dom->isDefaultNamespace(Reader\Reader::NAMESPACE_ATOM_10)
|| !empty($prefixAtom10)) {
return Reader\Reader::TYPE_ATOM_10;
}
}
}
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