1 files changed, 169 insertions, 0 deletions
diff --git a/classes/FeedItem_RSS.php b/classes/FeedItem_RSS.php
new file mode 100644
index 000000000..b5710ef4f
--- /dev/null
+++ b/classes/FeedItem_RSS.php
@@ -0,0 +1,169 @@
+<?php
+class FeedItem_RSS extends FeedItem_Common {
+	function get_id(): string {
+		$id = $this->elem->getElementsByTagName("guid")->item(0);
+
+		if ($id) {
+			return clean($id->nodeValue);
+		} else {
+			return clean($this->get_link());
+		}
+	}
+
+	/**
+	 * @return int|false a timestamp on success, false otherwise
+	 */
+	function get_date() {
+		$pubDate = $this->elem->getElementsByTagName("pubDate")->item(0);
+
+		if ($pubDate) {
+			return strtotime($pubDate->nodeValue ?? '');
+		}
+
+		$date = $this->xpath->query("dc:date", $this->elem)->item(0);
+
+		if ($date) {
+			return strtotime($date->nodeValue ?? '');
+		}
+
+		// consistent with strtotime failing to parse
+		return false;
+	}
+
+	function get_link(): string {
+		$links = $this->xpath->query("atom:link", $this->elem);
+
+		foreach ($links as $link) {
+			if ($link && $link->hasAttribute("href") &&
+				(!$link->hasAttribute("rel")
+					|| $link->getAttribute("rel") == "alternate"
+					|| $link->getAttribute("rel") == "standout")) {
+
+				return clean(trim($link->getAttribute("href")));
+			}
+		}
+
+		/** @var DOMElement|null */
+		$link = $this->elem->getElementsByTagName("guid")->item(0);
+
+		if ($link && $link->hasAttributes() && $link->getAttribute("isPermaLink") == "true") {
+			return clean(trim($link->nodeValue));
+		}
+
+		$link = $this->elem->getElementsByTagName("link")->item(0);
+
+		if ($link) {
+			return clean(trim($link->nodeValue));
+		}
+
+		return '';
+	}
+
+	function get_title(): string {
+		$title = $this->xpath->query("title", $this->elem)->item(0);
+
+		if ($title) {
+			return clean(trim($title->nodeValue));
+		}
+
+		// if the document has a default namespace then querying for
+		// title would fail because of reasons so let's try the old way
+		$title = $this->elem->getElementsByTagName("title")->item(0);
+
+		if ($title) {
+			return clean(trim($title->nodeValue));
+		}
+
+		return '';
+	}
+
+	function get_content(): string {
+		/** @var DOMElement|null */
+		$contentA = $this->xpath->query("content:encoded", $this->elem)->item(0);
+
+		/** @var DOMElement|null */
+		$contentB = $this->elem->getElementsByTagName("description")->item(0);
+
+		if ($contentA && $contentB) {
+			$resultA = $this->subtree_or_text($contentA);
+			$resultB = $this->subtree_or_text($contentB);
+
+			return mb_strlen($resultA) > mb_strlen($resultB) ? $resultA : $resultB;
+		}
+
+		if ($contentA) {
+			return $this->subtree_or_text($contentA);
+		}
+
+		if ($contentB) {
+			return $this->subtree_or_text($contentB);
+		}
+
+		return '';
+	}
+
+	function get_description(): string {
+		$summary = $this->elem->getElementsByTagName("description")->item(0);
+
+		if ($summary) {
+			return $summary->nodeValue;
+		}
+
+		return '';
+	}
+
+	/**
+	 * @return array<int, string>
+	 */
+	function get_categories(): array {
+		$categories = $this->elem->getElementsByTagName("category");
+		$cats = [];
+
+		foreach ($categories as $cat) {
+			array_push($cats, $cat->nodeValue);
+		}
+
+		$categories = $this->xpath->query("dc:subject", $this->elem);
+
+		foreach ($categories as $cat) {
+			array_push($cats, $cat->nodeValue);
+		}
+
+		return $this->normalize_categories($cats);
+	}
+
+	/**
+	 * @return array<int, FeedEnclosure>
+	 */
+	function get_enclosures(): array {
+		$enclosures = $this->elem->getElementsByTagName("enclosure");
+
+		$encs = array();
+
+		foreach ($enclosures as $enclosure) {
+			$enc = new FeedEnclosure();
+
+			$enc->type = clean($enclosure->getAttribute("type"));
+			$enc->link = clean($enclosure->getAttribute("url"));
+			$enc->length = clean($enclosure->getAttribute("length"));
+			$enc->height = clean($enclosure->getAttribute("height"));
+			$enc->width = clean($enclosure->getAttribute("width"));
+
+			array_push($encs, $enc);
+		}
+
+		array_push($encs, ...parent::get_enclosures());
+
+		return $encs;
+	}
+
+	function get_language(): string {
+		$languages = $this->doc->getElementsByTagName('language');
+
+		if (count($languages) == 0) {
+			return "";
+		}
+
+		return clean($languages[0]->textContent);
+	}
+}