move common methods to feeditem_common

classes/feeditem/common.php

@@ -0,0 +1,48 @@
+<?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;
+	}
+
+	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;
+		}
+
+		$author = $this->xpath->query("dc:creator", $this->elem)->item(0);
+
+		if ($author) {
+			return $author->nodeValue;
+		}
+	}
+
+	// todo
+	function get_comments_url() {
+
+	}
+
+	function get_comments_count() {
+		$comments = $this->xpath->query("slash:comments", $this->elem)->item(0);
+
+		if ($comments) {
+			return $comments->nodeValue;
+		}
+	}
+
+
+}
+?>