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<?php
abstract class FeedItem_Common extends FeedItem {
protected $elem;
protected $xpath;
protected $doc;
function __construct($elem, $doc, $xpath) {
$this->elem = $elem;
$this->xpath = $xpath;
$this->doc = $doc;
try {
$source = $elem->getElementsByTagName("source")->item(0);
// we don't need <source> element
if ($source)
$elem->removeChild($source);
} catch (DOMException $e) {
//
}
}
function get_author() {
$author = $this->elem->getElementsByTagName("author")->item(0);
if ($author) {
$name = $author->getElementsByTagName("name")->item(0);
if ($name) return $name->nodeValue;
$email = $author->getElementsByTagName("email")->item(0);
if ($email) return $email->nodeValue;
if ($author->nodeValue)
return $author->nodeValue;
}
$author = $this->xpath->query("dc:creator", $this->elem)->item(0);
if ($author) {
return $author->nodeValue;
}
}
function get_comments_url() {
//RSS only. Use a query here to avoid namespace clashes (e.g. with slash).
//might give a wrong result if a default namespace was declared (possible with XPath 2.0)
$com_url = $this->xpath->query("comments", $this->elem)->item(0);
if($com_url)
return $com_url->nodeValue;
//Atom Threading Extension (RFC 4685) stuff. Could be used in RSS feeds, so it's in common.
//'text/html' for type is too restrictive?
$com_url = $this->xpath->query("atom:link[@rel='replies' and contains(@type,'text/html')]/@href", $this->elem)->item(0);
if($com_url)
return $com_url->nodeValue;
}
function get_comments_count() {
//also query for ATE stuff here
$query = "slash:comments|thread:total|atom:link[@rel='replies']/@thread:count";
$comments = $this->xpath->query($query, $this->elem)->item(0);
if ($comments) {
return $comments->nodeValue;
}
}
function count_children($node) {
return $node->getElementsByTagName("*")->length;
}
function subtree_or_text($node) {
if ($this->count_children($node) == 0) {
return $node->nodeValue;
} else {
return $node->c14n();
}
}
}
?>
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