Fix issue #269: Library returning incorrect href

lib/parser.js

@@ -131,12 +131,35 @@ class Parser {
     return prom;
   }
 
+  getFeedUrl(links) {
+    if (!Array.isArray(links)) {
+      links = [links];
+    }
+
+    for (let link of links) {
+      if (link.$ && link.$.rel === 'self' && 
+          (link.$.type === 'application/rss+xml' || link.$.type === 'application/atom+xml')) {
+        return link.$.href;
+      }
+    }
+
+    // If no suitable link is found, fall back to the first link with rel="self"
+    for (let link of links) {
+      if (link.$ && link.$.rel === 'self') {
+        return link.$.href;
+      }
+    }
+
+    // If still no suitable link is found, return the href of the first link
+    return links[0] && links[0].$ ? links[0].$.href : null;
+  }
+
   buildAtomFeed(xmlObj) {
     let feed = {items: []};
     utils.copyFromXML(xmlObj.feed, feed, this.options.customFields.feed);
     if (xmlObj.feed.link) {
       feed.link = utils.getLink(xmlObj.feed.link, 'alternate', 0);
-      feed.feedUrl = utils.getLink(xmlObj.feed.link, 'self', 1);
+      feed.feedUrl = this.getFeedUrl(xmlObj.feed.link);
     }
     if (xmlObj.feed.title) {
       let title = xmlObj.feed.title[0] || '';