feat(parsing): Replace rss-parser with fast-xml-parser and add native feed parser; update Smartfeed to use parseFeedXML and adjust plugins/tests

ts/classes.smartfeed.ts

@@ -3,6 +3,7 @@ import type { IFeedOptions } from './classes.feed.js';
 import { PodcastFeed } from './classes.podcast.js';
 import type { IPodcastFeedOptions } from './classes.podcast.js';
 import * as plugins from './plugins.js';
+import { parseFeedXML } from './lib/feedparser.js';
 
 /**
  * Main class for creating and parsing various feed formats (RSS, Atom, JSON Feed)
@@ -120,9 +121,7 @@ export class Smartfeed {
    * ```
    */
   public async parseFeedFromString(rssFeedString: string) {
-    const parser = new plugins.rssParser();
-    const resultingFeed = await parser.parseString(rssFeedString);
-    return resultingFeed;
+    return parseFeedXML(rssFeedString);
   }
 
   /**
@@ -138,8 +137,11 @@ export class Smartfeed {
    * ```
    */
   public async parseFeedFromUrl(urlArg: string) {
-    const parser = new plugins.rssParser();
-    const resultingFeed = await parser.parseURL(urlArg);
-    return resultingFeed;
+    const response = await fetch(urlArg);
+    if (!response.ok) {
+      throw new Error(`Failed to fetch feed: ${response.status} ${response.statusText}`);
+    }
+    const xmlString = await response.text();
+    return parseFeedXML(xmlString);
   }
 }