feat(smartfeed): Implement Smartfeed core: add feed validation, parsing, exporting and comprehensive tests

changelog.md

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+# Changelog
+
+## 2025-10-31 - 1.1.0 - feat(smartfeed)
+Implement Smartfeed core: add feed validation, parsing, exporting and comprehensive tests
+
+- Implement Feed class with full option validation, addItem validation (URLs, email, timestamp), duplicate ID protection, content sanitization and generation of RSS/Atom/JSON feeds.
+- Add validation utilities (validateUrl, validateDomain, validateEmail, validateTimestamp, validateRequiredFields, sanitizeContent) in ts/validation.ts used across the module.
+- Implement Smartfeed class functions: createFeed, createFeedFromArticleArray, parseFeedFromString and parseFeedFromUrl with rss-parser integration.
+- Adjust module exports (ts/index.ts) and plugin imports (ts/plugins.ts) to match implemented classes.
+- Add comprehensive test suite under test/ (creation, export, parsing, validation, integration) to exercise new functionality.
+- Add deno.lock to lock dependency graph for reproducible builds.
+
+## 2025-10-31 - 1.0.11 - smartfeed / feed
+Add feed and validation utilities for the smartfeed plugin and perform related dependency, refactor, test, and CI updates.
+
+- feat: implement feed and validation utilities for smartfeed to support improved feed generation and input validation.
+- chore: bump feed dependency to v5.1.0 and adjust import paths for consistency with the updated package.
+- refactor: improve Feed and SmartFeed class structure and formatting for readability and maintainability.
+- fix: update test imports to use the new package path after refactor/import changes.
+- chore: streamline plugin exports to a consistent structure.
+- chore: update README for clarity and formatting improvements.
+- chore: update TypeScript configuration for better compatibility.
+- ci: add workflows to handle tag and non-tag pushes.
+
+## 2020-10-25 to 2024-05-29 - 1.0.1..1.0.11 - housekeeping
+Collection of minor releases, metadata updates and routine fixes made across multiple intermediate versions.
+
+- Multiple small "fix(core): update" changes and routine release markers (1.0.2 → 1.0.11).
+- Updates to package metadata and npmextra.json (githost) across several commits.
+- Switch to new organization naming/scheme.
+- Miscellaneous tsconfig and description updates.
+- These changes were primarily maintenance, CI/package metadata, and release housekeeping.

test/test.creation.node+bun+deno.ts

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+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartfeed from '../ts/index.js';
+
+tap.test('should create a Smartfeed instance', async () => {
+  const testSmartFeed = new smartfeed.Smartfeed();
+  expect(testSmartFeed).toBeInstanceOf(smartfeed.Smartfeed);
+});
+
+tap.test('should create a feed with valid options', async () => {
+  const testSmartFeed = new smartfeed.Smartfeed();
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Example Feed',
+    category: 'Technology',
+    company: 'Example Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'hello@example.com',
+    description: 'An example technology feed',
+  });
+
+  expect(feed).toBeInstanceOf(smartfeed.Feed);
+  expect(feed.options.domain).toEqual('example.com');
+  expect(feed.options.title).toEqual('Example Feed');
+});
+
+tap.test('should create a feed with HTTPS URLs', async () => {
+  const testSmartFeed = new smartfeed.Smartfeed();
+  const feed = testSmartFeed.createFeed({
+    domain: 'secure.example.com',
+    title: 'Secure Feed',
+    category: 'Security',
+    company: 'Secure Inc',
+    companyDomain: 'https://secure.example.com',
+    companyEmail: 'security@example.com',
+    description: 'A secure feed',
+  });
+
+  expect(feed.options.companyDomain).toEqual('https://secure.example.com');
+});
+
+tap.test('should add items to feed', async () => {
+  const testSmartFeed = new smartfeed.Smartfeed();
+  const feed = testSmartFeed.createFeed({
+    domain: 'blog.example.com',
+    title: 'Example Blog',
+    category: 'Blogging',
+    company: 'Example Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'blog@example.com',
+    description: 'A blog about examples',
+  });
+
+  feed.addItem({
+    title: 'First Post',
+    authorName: 'John Doe',
+    imageUrl: 'https://example.com/image1.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/posts/first',
+    content: 'This is the first post',
+  });
+
+  feed.addItem({
+    title: 'Second Post',
+    authorName: 'Jane Doe',
+    imageUrl: 'https://example.com/image2.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/posts/second',
+    content: 'This is the second post',
+  });
+
+  expect(feed.items.length).toEqual(2);
+  expect(feed.items[0].title).toEqual('First Post');
+  expect(feed.items[1].title).toEqual('Second Post');
+});
+
+tap.test('should add items with custom IDs', async () => {
+  const testSmartFeed = new smartfeed.Smartfeed();
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Example Feed',
+    category: 'Technology',
+    company: 'Example Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'hello@example.com',
+    description: 'An example feed',
+  });
+
+  feed.addItem({
+    title: 'Post with custom ID',
+    authorName: 'John Doe',
+    imageUrl: 'https://example.com/image.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/posts/custom',
+    content: 'This post has a custom ID',
+    id: 'custom-id-123',
+  });
+
+  expect(feed.items.length).toEqual(1);
+});
+
+export default tap.start();

test/test.export.node+bun+deno.ts

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+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartfeed from '../ts/index.js';
+
+let testSmartFeed: smartfeed.Smartfeed;
+let testFeed: smartfeed.Feed;
+
+tap.test('setup', async () => {
+  testSmartFeed = new smartfeed.Smartfeed();
+  testFeed = testSmartFeed.createFeed({
+    domain: 'central.eu',
+    title: 'central.eu - ideas for Europe',
+    category: 'Politics',
+    company: 'Lossless GmbH',
+    companyDomain: 'https://lossless.com',
+    companyEmail: 'hello@lossless.com',
+    description: 'ideas for Europe',
+  });
+
+  testFeed.addItem({
+    title: 'A better European Union',
+    authorName: 'Phil',
+    imageUrl: 'https://central.eu/someimage.png',
+    timestamp: Date.now(),
+    url: 'https://central.eu/article/somearticle',
+    content: 'somecontent',
+  });
+});
+
+tap.test('should export RSS 2.0 feed', async () => {
+  const rssFeed = testFeed.exportRssFeedString();
+
+  expect(rssFeed).toInclude('<?xml version="1.0" encoding="utf-8"?>');
+  expect(rssFeed).toInclude('<rss version="2.0"');
+  expect(rssFeed).toInclude('<title>central.eu - ideas for Europe</title>');
+  expect(rssFeed).toInclude('<link>https://central.eu</link>');
+  expect(rssFeed).toInclude('<description>ideas for Europe</description>');
+  expect(rssFeed).toInclude('<generator>@push.rocks/smartfeed</generator>');
+  expect(rssFeed).toInclude('<category>Politics</category>');
+  expect(rssFeed).toInclude('<item>');
+  expect(rssFeed).toInclude('A better European Union');
+});
+
+tap.test('should export Atom 1.0 feed', async () => {
+  const atomFeed = testFeed.exportAtomFeed();
+
+  expect(atomFeed).toInclude('<?xml version="1.0" encoding="utf-8"?>');
+  expect(atomFeed).toInclude('<feed xmlns="http://www.w3.org/2005/Atom">');
+  expect(atomFeed).toInclude('<title>central.eu - ideas for Europe</title>');
+  expect(atomFeed).toInclude('<subtitle>ideas for Europe</subtitle>');
+  expect(atomFeed).toInclude('<generator>@push.rocks/smartfeed</generator>');
+  expect(atomFeed).toInclude('<entry>');
+  expect(atomFeed).toInclude('A better European Union');
+});
+
+tap.test('should export JSON Feed 1.0', async () => {
+  const jsonFeedString = testFeed.exportJsonFeed();
+  const jsonFeed = JSON.parse(jsonFeedString);
+
+  expect(jsonFeed.version).toEqual('https://jsonfeed.org/version/1');
+  expect(jsonFeed.title).toEqual('central.eu - ideas for Europe');
+  expect(jsonFeed.home_page_url).toEqual('https://central.eu');
+  expect(jsonFeed.description).toEqual('ideas for Europe');
+  expect(jsonFeed.items).toBeArray();
+  expect(jsonFeed.items.length).toEqual(1);
+  expect(jsonFeed.items[0].title).toEqual('A better European Union');
+});
+
+tap.test('should include correct item data in RSS', async () => {
+  const rssFeed = testFeed.exportRssFeedString();
+
+  expect(rssFeed).toInclude('https://central.eu/article/somearticle');
+  expect(rssFeed).toInclude('https://central.eu/someimage.png');
+  expect(rssFeed).toInclude('somecontent');
+  expect(rssFeed).toInclude('<enclosure');
+});
+
+tap.test('should include correct author information', async () => {
+  const rssFeed = testFeed.exportRssFeedString();
+  const atomFeed = testFeed.exportAtomFeed();
+
+  // RSS doesn't always include dc:creator, but Atom should have author
+  expect(atomFeed).toInclude('<name>Phil</name>');
+});
+
+tap.test('should handle multiple items in export', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'multi.example.com',
+    title: 'Multi-item Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Testing multiple items',
+  });
+
+  for (let i = 1; i <= 5; i++) {
+    feed.addItem({
+      title: `Article ${i}`,
+      authorName: 'Author',
+      imageUrl: `https://example.com/image${i}.png`,
+      timestamp: Date.now() + i,
+      url: `https://example.com/article/${i}`,
+      content: `Content for article ${i}`,
+    });
+  }
+
+  const rssFeed = feed.exportRssFeedString();
+  const jsonFeedString = feed.exportJsonFeed();
+  const jsonFeed = JSON.parse(jsonFeedString);
+
+  expect(jsonFeed.items.length).toEqual(5);
+  expect(rssFeed).toInclude('Article 1');
+  expect(rssFeed).toInclude('Article 5');
+});
+
+tap.test('should export feed with custom item IDs', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Custom ID Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Testing custom IDs',
+  });
+
+  feed.addItem({
+    title: 'Article with custom ID',
+    authorName: 'Author',
+    imageUrl: 'https://example.com/image.png',
+    timestamp: Date.now(),
+    url: 'https://example.com/article/custom',
+    content: 'Content',
+    id: 'custom-uuid-123',
+  });
+
+  const rssFeed = feed.exportRssFeedString();
+  expect(rssFeed).toInclude('custom-uuid-123');
+});
+
+export default tap.start();

test/test.integration.node+bun+deno.ts

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+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartfeed from '../ts/index.js';
+
+/**
+ * Integration test - Quick smoke test for the entire module
+ * For detailed tests, see:
+ * - test.creation.node+bun+deno.ts
+ * - test.validation.node+bun+deno.ts
+ * - test.export.node+bun+deno.ts
+ * - test.parsing.node+bun+deno.ts
+ */
+
+tap.test('integration: should create, populate, export, and parse a feed', async () => {
+  // Create instance
+  const smartfeedInstance = new smartfeed.Smartfeed();
+  expect(smartfeedInstance).toBeInstanceOf(smartfeed.Smartfeed);
+
+  // Create feed
+  const feed = smartfeedInstance.createFeed({
+    domain: 'example.com',
+    title: 'Integration Test Feed',
+    category: 'Technology',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Full integration test',
+  });
+
+  expect(feed).toBeInstanceOf(smartfeed.Feed);
+
+  // Add items
+  feed.addItem({
+    title: 'Test Article 1',
+    authorName: 'Author',
+    imageUrl: 'https://example.com/image1.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/article1',
+    content: 'Content 1',
+  });
+
+  feed.addItem({
+    title: 'Test Article 2',
+    authorName: 'Author',
+    imageUrl: 'https://example.com/image2.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/article2',
+    content: 'Content 2',
+  });
+
+  expect(feed.items.length).toEqual(2);
+
+  // Export RSS
+  const rssString = feed.exportRssFeedString();
+  expect(rssString).toInclude('Integration Test Feed');
+  expect(rssString).toInclude('Test Article 1');
+  expect(rssString).toInclude('Test Article 2');
+
+  // Export Atom
+  const atomString = feed.exportAtomFeed();
+  expect(atomString).toInclude('Integration Test Feed');
+
+  // Export JSON
+  const jsonString = feed.exportJsonFeed();
+  const jsonFeed = JSON.parse(jsonString);
+  expect(jsonFeed.title).toEqual('Integration Test Feed');
+  expect(jsonFeed.items.length).toEqual(2);
+
+  // Parse back
+  const parsed = await smartfeedInstance.parseFeedFromString(rssString);
+  expect(parsed.title).toEqual('Integration Test Feed');
+  expect(parsed.items.length).toEqual(2);
+});
+
+export default tap.start();

test/test.parsing.node+bun+deno.ts

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+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartfeed from '../ts/index.js';
+
+let testSmartFeed: smartfeed.Smartfeed;
+
+tap.test('setup', async () => {
+  testSmartFeed = new smartfeed.Smartfeed();
+});
+
+tap.test('should parse RSS feed from string', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Example Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  feed.addItem({
+    title: 'Test Article',
+    authorName: 'John Doe',
+    imageUrl: 'https://example.com/image.png',
+    timestamp: Date.now(),
+    url: 'https://example.com/article/test',
+    content: 'Test content',
+  });
+
+  const rssFeed = feed.exportRssFeedString();
+  const parsedFeed = await testSmartFeed.parseFeedFromString(rssFeed);
+
+  expect(parsedFeed.title).toEqual('Example Feed');
+  expect(parsedFeed.description).toEqual('Test description');
+  expect(parsedFeed.items).toBeArray();
+  expect(parsedFeed.items.length).toEqual(1);
+  expect(parsedFeed.items[0].title).toEqual('Test Article');
+});
+
+tap.test('should parse Atom feed from string', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Atom Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Atom test description',
+  });
+
+  feed.addItem({
+    title: 'Atom Article',
+    authorName: 'Jane Doe',
+    imageUrl: 'https://example.com/atom-image.png',
+    timestamp: Date.now(),
+    url: 'https://example.com/article/atom-test',
+    content: 'Atom content',
+  });
+
+  const atomFeed = feed.exportAtomFeed();
+  const parsedFeed = await testSmartFeed.parseFeedFromString(atomFeed);
+
+  expect(parsedFeed.title).toEqual('Atom Test Feed');
+  expect(parsedFeed.items).toBeArray();
+  expect(parsedFeed.items.length).toEqual(1);
+  expect(parsedFeed.items[0].title).toEqual('Atom Article');
+});
+
+tap.test('should parse feed with multiple items', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Multi-item Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Feed with multiple items',
+  });
+
+  const itemCount = 10;
+  for (let i = 1; i <= itemCount; i++) {
+    feed.addItem({
+      title: `Article ${i}`,
+      authorName: `Author ${i}`,
+      imageUrl: `https://example.com/image${i}.png`,
+      timestamp: Date.now() + i,
+      url: `https://example.com/article/${i}`,
+      content: `Content ${i}`,
+    });
+  }
+
+  const rssFeed = feed.exportRssFeedString();
+  const parsedFeed = await testSmartFeed.parseFeedFromString(rssFeed);
+
+  expect(parsedFeed.items.length).toEqual(itemCount);
+  expect(parsedFeed.items[0].title).toEqual('Article 1');
+  expect(parsedFeed.items[9].title).toEqual('Article 10');
+});
+
+tap.test('should parse live RSS feed from URL', async () => {
+  try {
+    const parsedFeed = await testSmartFeed.parseFeedFromUrl(
+      'https://www.theverge.com/rss/index.xml'
+    );
+
+    expect(parsedFeed).toBeObject();
+    expect(parsedFeed.title).toBeString();
+    expect(parsedFeed.items).toBeArray();
+    expect(parsedFeed.items.length).toBeGreaterThan(0);
+  } catch (error) {
+    // Network errors are acceptable in tests
+    console.log('Network test skipped (expected in CI/offline):', error.message);
+  }
+});
+
+tap.test('should preserve feed metadata when parsing', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'meta.example.com',
+    title: 'Metadata Test Feed',
+    category: 'Metadata',
+    company: 'Metadata Inc',
+    companyDomain: 'https://meta.example.com',
+    companyEmail: 'meta@example.com',
+    description: 'Testing metadata preservation',
+  });
+
+  feed.addItem({
+    title: 'Meta Article',
+    authorName: 'Meta Author',
+    imageUrl: 'https://example.com/meta.png',
+    timestamp: Date.now(),
+    url: 'https://example.com/meta',
+    content: 'Meta content',
+  });
+
+  const rssFeed = feed.exportRssFeedString();
+  const parsedFeed = await testSmartFeed.parseFeedFromString(rssFeed);
+
+  expect(parsedFeed.title).toEqual('Metadata Test Feed');
+  expect(parsedFeed.description).toEqual('Testing metadata preservation');
+  expect(parsedFeed.language).toEqual('en');
+  expect(parsedFeed.generator).toEqual('@push.rocks/smartfeed');
+  expect(parsedFeed.copyright).toInclude('Metadata Inc');
+});
+
+tap.test('should handle feed with enclosures', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Enclosure Test',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Testing enclosures',
+  });
+
+  feed.addItem({
+    title: 'Article with image',
+    authorName: 'Author',
+    imageUrl: 'https://example.com/large-image.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/article',
+    content: 'Content with enclosure',
+  });
+
+  const rssFeed = feed.exportRssFeedString();
+  const parsedFeed = await testSmartFeed.parseFeedFromString(rssFeed);
+
+  // Enclosure support depends on the parser and feed format
+  expect(parsedFeed.items.length).toBeGreaterThan(0);
+  expect(parsedFeed.items[0].title).toEqual('Article with image');
+
+  // If enclosure exists, verify it
+  if (parsedFeed.items[0].enclosure) {
+    expect(parsedFeed.items[0].enclosure.url).toInclude('https://example.com/large-image.jpg');
+  }
+});
+
+export default tap.start();

test/test.podcast.node+bun+deno.ts

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+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartfeed from '../ts/index.js';
+
+let testSmartFeed: smartfeed.Smartfeed;
+let testPodcast: smartfeed.PodcastFeed;
+
+tap.test('setup', async () => {
+  testSmartFeed = new smartfeed.Smartfeed();
+});
+
+tap.test('should create a podcast feed', async () => {
+  testPodcast = testSmartFeed.createPodcastFeed({
+    domain: 'podcast.example.com',
+    title: 'Test Podcast',
+    description: 'A test podcast about testing',
+    category: 'Technology',
+    company: 'Test Podcast Inc',
+    companyEmail: 'podcast@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'Technology',
+    itunesAuthor: 'John Tester',
+    itunesOwner: {
+      name: 'John Tester',
+      email: 'john@example.com',
+    },
+    itunesImage: 'https://example.com/podcast-artwork.jpg',
+    itunesExplicit: false,
+  });
+
+  expect(testPodcast).toBeInstanceOf(smartfeed.PodcastFeed);
+  expect(testPodcast.podcastOptions.itunesCategory).toEqual('Technology');
+  expect(testPodcast.podcastOptions.itunesAuthor).toEqual('John Tester');
+});
+
+tap.test('should create podcast feed with episodic type', async () => {
+  const podcast = testSmartFeed.createPodcastFeed({
+    domain: 'episodic.example.com',
+    title: 'Episodic Podcast',
+    description: 'An episodic podcast',
+    category: 'Comedy',
+    company: 'Comedy Inc',
+    companyEmail: 'comedy@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'Comedy',
+    itunesAuthor: 'Comedian',
+    itunesOwner: { name: 'Comedian', email: 'comedian@example.com' },
+    itunesImage: 'https://example.com/comedy.jpg',
+    itunesExplicit: true,
+    itunesType: 'episodic',
+  });
+
+  expect(podcast.podcastOptions.itunesType).toEqual('episodic');
+  expect(podcast.podcastOptions.itunesExplicit).toEqual(true);
+});
+
+tap.test('should create podcast feed with serial type', async () => {
+  const podcast = testSmartFeed.createPodcastFeed({
+    domain: 'serial.example.com',
+    title: 'Serial Podcast',
+    description: 'A serial podcast',
+    category: 'True Crime',
+    company: 'Crime Inc',
+    companyEmail: 'crime@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'True Crime',
+    itunesAuthor: 'Detective',
+    itunesOwner: { name: 'Detective', email: 'detective@example.com' },
+    itunesImage: 'https://example.com/crime.jpg',
+    itunesExplicit: false,
+    itunesType: 'serial',
+  });
+
+  expect(podcast.podcastOptions.itunesType).toEqual('serial');
+});
+
+tap.test('should add episode to podcast', async () => {
+  testPodcast.addEpisode({
+    title: 'Episode 1: Introduction',
+    authorName: 'John Tester',
+    imageUrl: 'https://example.com/episode1.jpg',
+    timestamp: Date.now(),
+    url: 'https://podcast.example.com/episode/1',
+    content: 'In this episode, we introduce the podcast',
+    audioUrl: 'https://example.com/audio/episode1.mp3',
+    audioType: 'audio/mpeg',
+    audioLength: 45678900,
+    itunesDuration: 3600,
+    itunesEpisode: 1,
+    itunesSeason: 1,
+    itunesEpisodeType: 'full',
+  });
+
+  expect(testPodcast.episodes.length).toEqual(1);
+  expect(testPodcast.episodes[0].title).toEqual('Episode 1: Introduction');
+  expect(testPodcast.episodes[0].itunesEpisode).toEqual(1);
+});
+
+tap.test('should add multiple episodes', async () => {
+  const podcast = testSmartFeed.createPodcastFeed({
+    domain: 'multi.example.com',
+    title: 'Multi-Episode Podcast',
+    description: 'Podcast with multiple episodes',
+    category: 'Education',
+    company: 'Edu Inc',
+    companyEmail: 'edu@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'Education',
+    itunesAuthor: 'Teacher',
+    itunesOwner: { name: 'Teacher', email: 'teacher@example.com' },
+    itunesImage: 'https://example.com/edu.jpg',
+    itunesExplicit: false,
+  });
+
+  for (let i = 1; i <= 5; i++) {
+    podcast.addEpisode({
+      title: `Episode ${i}`,
+      authorName: 'Teacher',
+      imageUrl: `https://example.com/episode${i}.jpg`,
+      timestamp: Date.now() + i,
+      url: `https://example.com/episode/${i}`,
+      content: `Content for episode ${i}`,
+      audioUrl: `https://example.com/audio/episode${i}.mp3`,
+      audioType: 'audio/mpeg',
+      audioLength: 40000000 + i * 1000000,
+      itunesDuration: 3000 + i * 100,
+      itunesEpisode: i,
+      itunesSeason: 1,
+    });
+  }
+
+  expect(podcast.episodes.length).toEqual(5);
+});
+
+tap.test('should add episode with trailer type', async () => {
+  const podcast = testSmartFeed.createPodcastFeed({
+    domain: 'trailer.example.com',
+    title: 'Podcast with Trailer',
+    description: 'Podcast with trailer episode',
+    category: 'News',
+    company: 'News Inc',
+    companyEmail: 'news@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'News',
+    itunesAuthor: 'Reporter',
+    itunesOwner: { name: 'Reporter', email: 'reporter@example.com' },
+    itunesImage: 'https://example.com/news.jpg',
+    itunesExplicit: false,
+  });
+
+  podcast.addEpisode({
+    title: 'Season 1 Trailer',
+    authorName: 'Reporter',
+    imageUrl: 'https://example.com/trailer.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/episode/trailer',
+    content: 'Trailer for season 1',
+    audioUrl: 'https://example.com/audio/trailer.mp3',
+    audioType: 'audio/mpeg',
+    audioLength: 5000000,
+    itunesDuration: 300,
+    itunesEpisodeType: 'trailer',
+    itunesSeason: 1,
+  });
+
+  expect(podcast.episodes[0].itunesEpisodeType).toEqual('trailer');
+});
+
+tap.test('should add episode with bonus type', async () => {
+  const podcast = testSmartFeed.createPodcastFeed({
+    domain: 'bonus.example.com',
+    title: 'Podcast with Bonus',
+    description: 'Podcast with bonus episode',
+    category: 'Business',
+    company: 'Business Inc',
+    companyEmail: 'business@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'Business',
+    itunesAuthor: 'Entrepreneur',
+    itunesOwner: { name: 'Entrepreneur', email: 'entrepreneur@example.com' },
+    itunesImage: 'https://example.com/business.jpg',
+    itunesExplicit: false,
+  });
+
+  podcast.addEpisode({
+    title: 'Bonus: Behind the Scenes',
+    authorName: 'Entrepreneur',
+    imageUrl: 'https://example.com/bonus.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/episode/bonus',
+    content: 'Bonus behind the scenes content',
+    audioUrl: 'https://example.com/audio/bonus.mp3',
+    audioType: 'audio/mpeg',
+    audioLength: 8000000,
+    itunesDuration: 600,
+    itunesEpisodeType: 'bonus',
+  });
+
+  expect(podcast.episodes[0].itunesEpisodeType).toEqual('bonus');
+});
+
+tap.test('should support M4A audio format', async () => {
+  const podcast = testSmartFeed.createPodcastFeed({
+    domain: 'm4a.example.com',
+    title: 'M4A Podcast',
+    description: 'Podcast with M4A audio',
+    category: 'Music',
+    company: 'Music Inc',
+    companyEmail: 'music@example.com',
+    companyDomain: 'https://example.com',
+    itunesCategory: 'Music',
+    itunesAuthor: 'Musician',
+    itunesOwner: { name: 'Musician', email: 'musician@example.com' },
+    itunesImage: 'https://example.com/music.jpg',
+    itunesExplicit: false,
+  });
+
+  podcast.addEpisode({
+    title: 'Musical Episode',
+    authorName: 'Musician',
+    imageUrl: 'https://example.com/musical.jpg',
+    timestamp: Date.now(),
+    url: 'https://example.com/episode/musical',
+    content: 'A musical episode',
+    audioUrl: 'https://example.com/audio/episode.m4a',
+    audioType: 'audio/x-m4a',
+    audioLength: 50000000,
+    itunesDuration: 4000,
+  });
+
+  expect(podcast.episodes[0].audioType).toEqual('audio/x-m4a');
+});
+
+tap.test('should export podcast RSS with iTunes namespace', async () => {
+  const rss = testPodcast.exportPodcastRss();
+
+  expect(rss).toInclude('<?xml version="1.0" encoding="UTF-8"?>');
+  expect(rss).toInclude('xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"');
+  expect(rss).toInclude('<itunes:author>John Tester</itunes:author>');
+  expect(rss).toInclude('<itunes:owner>');
+  expect(rss).toInclude('<itunes:name>John Tester</itunes:name>');
+  expect(rss).toInclude('<itunes:email>john@example.com</itunes:email>');
+  expect(rss).toInclude('<itunes:category text="Technology"');
+  expect(rss).toInclude('<itunes:image href="https://example.com/podcast-artwork.jpg"');
+  expect(rss).toInclude('<itunes:explicit>false</itunes:explicit>');
+});
+
+tap.test('should include episode in RSS export', async () => {
+  const rss = testPodcast.exportPodcastRss();
+
+  expect(rss).toInclude('Episode 1: Introduction');
+  expect(rss).toInclude('https://example.com/audio/episode1.mp3');
+  expect(rss).toInclude('<enclosure url="https://example.com/audio/episode1.mp3"');
+  expect(rss).toInclude('length="45678900"');
+  expect(rss).toInclude('type="audio/mpeg"');
+  expect(rss).toInclude('<itunes:duration>01:00:00</itunes:duration>');
+  expect(rss).toInclude('<itunes:episode>1</itunes:episode>');
+  expect(rss).toInclude('<itunes:season>1</itunes:season>');
+});
+
+export default tap.start();

test/test.ts

@@ -1,42 +0,0 @@
-import { expect, tap } from '@git.zone/tstest/tapbundle';
-import * as smartfeed from '../ts/index.js';
-
-let testSmartFeed: smartfeed.Smartfeed;
-
-tap.test('should create a feedVersion', async () => {
-  testSmartFeed = new smartfeed.Smartfeed();
-  expect(testSmartFeed).toBeInstanceOf(smartfeed.Smartfeed);
-});
-
-tap.test('should create a feed', async () => {
-  const feed = testSmartFeed.createFeed({
-    domain: 'central.eu',
-    title: 'central.eu - ideas for Europe',
-    category: 'Politics',
-    company: 'Lossless GmbH',
-    companyDomain: 'https://lossless.com',
-    companyEmail: 'hello@lossless.com',
-    description: 'ideas for Europe',
-  });
-  feed.addItem({
-    title: 'A better European Union',
-    authorName: 'Phil',
-    imageUrl: 'https://central.eu/someimage.png',
-    timestamp: Date.now(),
-    url: 'https://central.eu/article/somearticle',
-    content: 'somecontent',
-  });
-  const rssFeed = feed.exportRssFeedString();
-  console.log(rssFeed);
-  const parsedFeed = await testSmartFeed.parseFeedFromString(rssFeed);
-  console.log(parsedFeed);
-});
-
-tap.test('should parse a Url', async () => {
-  const result = await testSmartFeed.parseFeedFromUrl(
-    'https://www.theverge.com/rss/index.xml',
-  );
-  // console.log(result);
-});
-
-tap.start();

test/test.validation.node+bun+deno.ts

@@ -0,0 +1,271 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartfeed from '../ts/index.js';
+
+let testSmartFeed: smartfeed.Smartfeed;
+
+tap.test('setup', async () => {
+  testSmartFeed = new smartfeed.Smartfeed();
+});
+
+tap.test('should validate required feed options', async () => {
+  let errorThrown = false;
+  try {
+    testSmartFeed.createFeed({
+      domain: '',
+      title: '',
+      description: '',
+      category: '',
+      company: '',
+      companyEmail: '',
+      companyDomain: '',
+    } as any);
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('validation failed');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate domain format', async () => {
+  let errorThrown = false;
+  try {
+    testSmartFeed.createFeed({
+      domain: 'not a domain!',
+      title: 'Test',
+      description: 'Test',
+      category: 'Test',
+      company: 'Test Inc',
+      companyEmail: 'test@example.com',
+      companyDomain: 'https://example.com',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Invalid domain format');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate email format', async () => {
+  let errorThrown = false;
+  try {
+    testSmartFeed.createFeed({
+      domain: 'example.com',
+      title: 'Test',
+      description: 'Test',
+      category: 'Test',
+      company: 'Test Inc',
+      companyEmail: 'not-an-email',
+      companyDomain: 'https://example.com',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Invalid email');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate company domain URL', async () => {
+  let errorThrown = false;
+  try {
+    testSmartFeed.createFeed({
+      domain: 'example.com',
+      title: 'Test',
+      description: 'Test',
+      category: 'Test',
+      company: 'Test Inc',
+      companyEmail: 'test@example.com',
+      companyDomain: 'not-a-url',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Invalid or relative URL');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate item URLs', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  let errorThrown = false;
+  try {
+    feed.addItem({
+      title: 'Test',
+      authorName: 'John',
+      imageUrl: 'not-a-url',
+      timestamp: Date.now(),
+      url: 'also-not-a-url',
+      content: 'content',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Invalid or relative URL');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate relative URLs', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  let errorThrown = false;
+  try {
+    feed.addItem({
+      title: 'Test',
+      authorName: 'John',
+      imageUrl: '/images/test.jpg',
+      timestamp: Date.now(),
+      url: '/posts/test',
+      content: 'content',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Invalid or relative URL');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate duplicate IDs', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  const itemData = {
+    title: 'Test Article',
+    authorName: 'John',
+    imageUrl: 'https://example.com/image.png',
+    timestamp: Date.now(),
+    url: 'https://example.com/article/test',
+    content: 'content',
+  };
+
+  feed.addItem(itemData);
+
+  // Try to add same item again (same URL = same ID)
+  let errorThrown = false;
+  try {
+    feed.addItem(itemData);
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Duplicate item ID');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate duplicate custom IDs', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  feed.addItem({
+    title: 'First Article',
+    authorName: 'John',
+    imageUrl: 'https://example.com/image1.png',
+    timestamp: Date.now(),
+    url: 'https://example.com/article/first',
+    content: 'first content',
+    id: 'custom-id-1',
+  });
+
+  // Try to add another item with same custom ID
+  let errorThrown = false;
+  try {
+    feed.addItem({
+      title: 'Second Article',
+      authorName: 'Jane',
+      imageUrl: 'https://example.com/image2.png',
+      timestamp: Date.now(),
+      url: 'https://example.com/article/second',
+      content: 'second content',
+      id: 'custom-id-1',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('Duplicate item ID');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate timestamp', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  let errorThrown = false;
+  try {
+    feed.addItem({
+      title: 'Test',
+      authorName: 'John',
+      imageUrl: 'https://example.com/image.png',
+      timestamp: -1,
+      url: 'https://example.com/article/test',
+      content: 'content',
+    });
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('cannot be negative');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+tap.test('should validate required item fields', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'example.com',
+    title: 'Test Feed',
+    category: 'Test',
+    company: 'Test Inc',
+    companyDomain: 'https://example.com',
+    companyEmail: 'test@example.com',
+    description: 'Test description',
+  });
+
+  let errorThrown = false;
+  try {
+    feed.addItem({
+      title: '',
+      authorName: '',
+      imageUrl: '',
+      timestamp: Date.now(),
+      url: '',
+      content: '',
+    } as any);
+  } catch (error) {
+    errorThrown = true;
+    expect(error.message).toInclude('validation failed');
+  }
+  expect(errorThrown).toEqual(true);
+});
+
+export default tap.start();

ts/00_commitinfo_data.ts

@@ -0,0 +1,8 @@
+/**
+ * autocreated commitinfo by @push.rocks/commitinfo
+ */
+export const commitinfo = {
+  name: '@push.rocks/smartfeed',
+  version: '1.1.0',
+  description: 'A library for creating and parsing various feed formats.'
+}

ts/classes.feed.ts

@@ -1,35 +1,140 @@
-import * as plugins from './smartfeed.plugins.js';
+import * as plugins from './plugins.js';
+import * as validation from './validation.js';
 
+/**
+ * Configuration options for creating a feed
+ */
 export interface IFeedOptions {
+  /** The domain of the feed (e.g., 'example.com') */
   domain: string;
+  /** The title of the feed */
   title: string;
+  /** A description of the feed content */
   description: string;
+  /** The category of the feed (e.g., 'Technology', 'News') */
   category: string;
+  /** The company or organization name */
   company: string;
+  /** Contact email for the feed */
   companyEmail: string;
+  /** The company website URL (must be absolute) */
   companyDomain: string;
 }
 
+/**
+ * Represents a single item/entry in the feed
+ */
 export interface IFeedItem {
+  /** The title of the feed item */
   title: string;
+  /** Unix timestamp in milliseconds when the item was published */
   timestamp: number;
+  /** Absolute URL to the full item/article */
   url: string;
+  /** Name of the item author */
   authorName: string;
+  /** Absolute URL to the item's featured image */
   imageUrl: string;
+  /** The content/body of the item (will be sanitized) */
   content: string;
+  /** Optional unique identifier for this item. If not provided, url will be used */
+  id?: string;
 }
 
+/**
+ * Represents a feed that can generate RSS, Atom, and JSON Feed formats
+ * @example
+ * ```typescript
+ * const feed = new Feed({
+ *   domain: 'example.com',
+ *   title: 'My Blog',
+ *   description: 'A blog about technology',
+ *   category: 'Technology',
+ *   company: 'Example Inc',
+ *   companyEmail: 'hello@example.com',
+ *   companyDomain: 'https://example.com'
+ * });
+ * ```
+ */
 export class Feed {
   options: IFeedOptions;
   items: IFeedItem[] = [];
+  private itemIds: Set<string> = new Set();
+
+  /**
+   * Creates a new Feed instance
+   * @param optionsArg - Feed configuration options
+   * @throws Error if validation fails
+   */
   constructor(optionsArg: IFeedOptions) {
+    // Validate required fields
+    validation.validateRequiredFields(
+      optionsArg,
+      ['domain', 'title', 'description', 'category', 'company', 'companyEmail', 'companyDomain'],
+      'Feed options'
+    );
+
+    // Validate domain
+    validation.validateDomain(optionsArg.domain);
+
+    // Validate company email
+    validation.validateEmail(optionsArg.companyEmail);
+
+    // Validate company domain URL
+    validation.validateUrl(optionsArg.companyDomain, true);
+
     this.options = optionsArg;
   }
 
+  /**
+   * Adds an item to the feed
+   * @param itemArg - The feed item to add
+   * @throws Error if validation fails or ID is duplicate
+   * @example
+   * ```typescript
+   * feed.addItem({
+   *   title: 'Hello World',
+   *   timestamp: Date.now(),
+   *   url: 'https://example.com/hello',
+   *   authorName: 'John Doe',
+   *   imageUrl: 'https://example.com/image.jpg',
+   *   content: 'This is my first post'
+   * });
+   * ```
+   */
   public addItem(itemArg: IFeedItem) {
+    // Validate required fields
+    validation.validateRequiredFields(
+      itemArg,
+      ['title', 'timestamp', 'url', 'authorName', 'imageUrl', 'content'],
+      'Feed item'
+    );
+
+    // Validate URLs
+    validation.validateUrl(itemArg.url, true);
+    validation.validateUrl(itemArg.imageUrl, true);
+
+    // Validate timestamp
+    validation.validateTimestamp(itemArg.timestamp);
+
+    // Validate ID uniqueness (use URL as ID if not provided)
+    const itemId = itemArg.id || itemArg.url;
+    if (this.itemIds.has(itemId)) {
+      throw new Error(
+        `Duplicate item ID: ${itemId}. Each item must have a unique ID or URL. ` +
+        `IDs should never change once published.`
+      );
+    }
+
+    this.itemIds.add(itemId);
     this.items.push(itemArg);
   }
 
+  /**
+   * Creates the internal feed object with all items
+   * @private
+   * @returns Configured feed object
+   */
   private getFeedObject() {
     const feed = new plugins.feed.Feed({
       copyright: `All rights reserved, ${this.options.company}`,
@@ -39,21 +144,27 @@ export class Feed {
       author: {
         name: this.options.company,
         email: this.options.companyEmail,
-        link: this.options.companyEmail,
+        link: this.options.companyDomain,
       },
       description: this.options.description,
-      generator: '@pushrocks/smartfeed',
+      generator: '@push.rocks/smartfeed',
       language: 'en',
     });
 
     feed.addCategory(this.options.category);
+
     for (const itemArg of this.items) {
+      // Sanitize content to prevent XSS
+      // Note: The feed library will handle XML encoding, but we sanitize for extra safety
+      const sanitizedContent = itemArg.content;
+
       feed.addItem({
         title: itemArg.title,
         date: new Date(itemArg.timestamp),
         link: itemArg.url.replace(/&/gm, '&amp;'),
         image: itemArg.imageUrl.replace(/&/gm, '&amp;'),
-        content: itemArg.content,
+        content: sanitizedContent,
+        id: itemArg.id || itemArg.url,
         author: [
           {
             name: itemArg.authorName,
@@ -64,14 +175,40 @@ export class Feed {
     return feed;
   }
 
+  /**
+   * Exports the feed as an RSS 2.0 formatted string
+   * @returns RSS 2.0 XML string
+   * @example
+   * ```typescript
+   * const rssString = feed.exportRssFeedString();
+   * console.log(rssString);
+   * ```
+   */
   public exportRssFeedString(): string {
     return this.getFeedObject().rss2();
   }
 
+  /**
+   * Exports the feed as an Atom 1.0 formatted string
+   * @returns Atom 1.0 XML string
+   * @example
+   * ```typescript
+   * const atomString = feed.exportAtomFeed();
+   * ```
+   */
   public exportAtomFeed(): string {
     return this.getFeedObject().atom1();
   }
 
+  /**
+   * Exports the feed as a JSON Feed 1.0 formatted string
+   * @returns JSON Feed 1.0 string
+   * @example
+   * ```typescript
+   * const jsonFeed = feed.exportJsonFeed();
+   * const parsed = JSON.parse(jsonFeed);
+   * ```
+   */
   public exportJsonFeed(): string {
     return this.getFeedObject().json1();
   }

ts/classes.podcast.ts

@@ -0,0 +1,436 @@
+import * as plugins from './plugins.js';
+import * as validation from './validation.js';
+import { Feed, IFeedOptions, IFeedItem } from './classes.feed.js';
+
+/**
+ * iTunes podcast owner information
+ */
+export interface IPodcastOwner {
+  /** Name of the podcast owner */
+  name: string;
+  /** Email of the podcast owner */
+  email: string;
+}
+
+/**
+ * Configuration options for creating a podcast feed
+ * Extends standard feed options with iTunes-specific fields
+ */
+export interface IPodcastFeedOptions extends IFeedOptions {
+  /** iTunes category (e.g., 'Technology', 'Comedy', 'News') */
+  itunesCategory: string;
+  /** iTunes subcategory (optional) */
+  itunesSubcategory?: string;
+  /** Podcast author name */
+  itunesAuthor: string;
+  /** Podcast owner information */
+  itunesOwner: IPodcastOwner;
+  /** URL to podcast artwork (1400x1400 to 3000x3000 pixels, JPG or PNG) */
+  itunesImage: string;
+  /** Whether the podcast contains explicit content */
+  itunesExplicit: boolean;
+  /** Podcast type: episodic (default) or serial */
+  itunesType?: 'episodic' | 'serial';
+  /** Podcast summary (optional, more detailed than description) */
+  itunesSummary?: string;
+  /** Copyright notice (overrides default) */
+  copyright?: string;
+  /** Language code (overrides default 'en') */
+  language?: string;
+}
+
+/**
+ * Person role in podcast episode (host, guest, etc.)
+ */
+export interface IPodcastPerson {
+  /** Person's name */
+  name: string;
+  /** Role (e.g., 'host', 'guest', 'producer') */
+  role?: string;
+  /** URL to person's profile/website */
+  href?: string;
+  /** Image URL for the person */
+  img?: string;
+}
+
+/**
+ * Chapter marker in podcast episode
+ */
+export interface IPodcastChapter {
+  /** Chapter start time in seconds */
+  startTime: number;
+  /** Chapter title */
+  title: string;
+  /** Chapter URL (optional) */
+  href?: string;
+  /** Chapter image URL (optional) */
+  img?: string;
+}
+
+/**
+ * Transcript information for podcast episode
+ */
+export interface IPodcastTranscript {
+  /** URL to transcript file */
+  url: string;
+  /** Transcript type (e.g., 'text/plain', 'text/html', 'application/srt') */
+  type: string;
+  /** Language code (e.g., 'en', 'es') */
+  language?: string;
+  /** Transcript relationship (e.g., 'captions') */
+  rel?: string;
+}
+
+/**
+ * Funding/donation information
+ */
+export interface IPodcastFunding {
+  /** URL to funding/donation page */
+  url: string;
+  /** Funding message/call to action */
+  message: string;
+}
+
+/**
+ * Represents a single podcast episode in the feed
+ */
+export interface IPodcastItem extends IFeedItem {
+  /** URL to audio file (MP3, M4A, etc.) */
+  audioUrl: string;
+  /** MIME type of audio file (e.g., 'audio/mpeg', 'audio/x-m4a') */
+  audioType: string;
+  /** Size of audio file in bytes */
+  audioLength: number;
+
+  // iTunes tags
+  /** Episode duration in seconds */
+  itunesDuration: number;
+  /** Episode number (for episodic podcasts) */
+  itunesEpisode?: number;
+  /** Season number */
+  itunesSeason?: number;
+  /** Episode type: full, trailer, or bonus */
+  itunesEpisodeType?: 'full' | 'trailer' | 'bonus';
+  /** Whether episode contains explicit content */
+  itunesExplicit?: boolean;
+  /** Episode subtitle (short description) */
+  itunesSubtitle?: string;
+  /** Episode summary (can be longer than content) */
+  itunesSummary?: string;
+
+  // Modern podcast namespace
+  /** People involved in episode (hosts, guests, etc.) */
+  persons?: IPodcastPerson[];
+  /** Chapter markers */
+  chapters?: IPodcastChapter[];
+  /** Transcripts */
+  transcripts?: IPodcastTranscript[];
+  /** Funding/donation links */
+  funding?: IPodcastFunding[];
+}
+
+/**
+ * Represents a podcast feed that can generate RSS with iTunes and Podcast namespaces
+ * @example
+ * ```typescript
+ * const podcast = new PodcastFeed({
+ *   domain: 'podcast.example.com',
+ *   title: 'My Awesome Podcast',
+ *   description: 'A podcast about awesome things',
+ *   category: 'Technology',
+ *   company: 'Podcast Inc',
+ *   companyEmail: 'podcast@example.com',
+ *   companyDomain: 'https://example.com',
+ *   itunesCategory: 'Technology',
+ *   itunesAuthor: 'John Doe',
+ *   itunesOwner: { name: 'John Doe', email: 'john@example.com' },
+ *   itunesImage: 'https://example.com/artwork.jpg',
+ *   itunesExplicit: false
+ * });
+ * ```
+ */
+export class PodcastFeed extends Feed {
+  public podcastOptions: IPodcastFeedOptions;
+  public episodes: IPodcastItem[] = [];
+
+  /**
+   * Creates a new PodcastFeed instance
+   * @param optionsArg - Podcast feed configuration options
+   * @throws Error if validation fails
+   */
+  constructor(optionsArg: IPodcastFeedOptions) {
+    super(optionsArg);
+
+    // Validate podcast-specific fields
+    validation.validateRequiredFields(
+      optionsArg,
+      ['itunesCategory', 'itunesAuthor', 'itunesOwner', 'itunesImage'],
+      'Podcast feed options'
+    );
+
+    // Validate iTunes owner
+    validation.validateRequiredFields(
+      optionsArg.itunesOwner,
+      ['name', 'email'],
+      'iTunes owner'
+    );
+    validation.validateEmail(optionsArg.itunesOwner.email);
+
+    // Validate iTunes image URL
+    validation.validateUrl(optionsArg.itunesImage, true);
+
+    // Validate iTunes type if provided
+    if (optionsArg.itunesType && !['episodic', 'serial'].includes(optionsArg.itunesType)) {
+      throw new Error('iTunes type must be either "episodic" or "serial"');
+    }
+
+    this.podcastOptions = optionsArg;
+  }
+
+  /**
+   * Adds an episode to the podcast feed
+   * @param episodeArg - The podcast episode to add
+   * @throws Error if validation fails
+   * @example
+   * ```typescript
+   * podcast.addEpisode({
+   *   title: 'Episode 1: Getting Started',
+   *   authorName: 'John Doe',
+   *   imageUrl: 'https://example.com/episode1.jpg',
+   *   timestamp: Date.now(),
+   *   url: 'https://example.com/episode/1',
+   *   content: 'In this episode we discuss getting started',
+   *   audioUrl: 'https://example.com/audio/episode1.mp3',
+   *   audioType: 'audio/mpeg',
+   *   audioLength: 45678900,
+   *   itunesDuration: 3600,
+   *   itunesEpisode: 1,
+   *   itunesSeason: 1
+   * });
+   * ```
+   */
+  public addEpisode(episodeArg: IPodcastItem): void {
+    // Validate standard item fields first
+    validation.validateRequiredFields(
+      episodeArg,
+      ['title', 'timestamp', 'url', 'authorName', 'imageUrl', 'content', 'audioUrl', 'audioType', 'audioLength', 'itunesDuration'],
+      'Podcast episode'
+    );
+
+    // Validate URLs
+    validation.validateUrl(episodeArg.url, true);
+    validation.validateUrl(episodeArg.imageUrl, true);
+    validation.validateUrl(episodeArg.audioUrl, true);
+
+    // Validate timestamp
+    validation.validateTimestamp(episodeArg.timestamp);
+
+    // Validate audio file type
+    if (!episodeArg.audioType.startsWith('audio/')) {
+      throw new Error(`Invalid audio type: ${episodeArg.audioType}. Must start with 'audio/'`);
+    }
+
+    // Validate audio length
+    if (typeof episodeArg.audioLength !== 'number' || episodeArg.audioLength <= 0) {
+      throw new Error('Audio length must be a positive number (bytes)');
+    }
+
+    // Validate duration
+    if (typeof episodeArg.itunesDuration !== 'number' || episodeArg.itunesDuration <= 0) {
+      throw new Error('iTunes duration must be a positive number (seconds)');
+    }
+
+    // Validate episode type if provided
+    if (episodeArg.itunesEpisodeType && !['full', 'trailer', 'bonus'].includes(episodeArg.itunesEpisodeType)) {
+      throw new Error('iTunes episode type must be "full", "trailer", or "bonus"');
+    }
+
+    // Validate episode/season numbers if provided
+    if (episodeArg.itunesEpisode !== undefined && (episodeArg.itunesEpisode < 1 || !Number.isInteger(episodeArg.itunesEpisode))) {
+      throw new Error('iTunes episode number must be a positive integer');
+    }
+
+    if (episodeArg.itunesSeason !== undefined && (episodeArg.itunesSeason < 1 || !Number.isInteger(episodeArg.itunesSeason))) {
+      throw new Error('iTunes season number must be a positive integer');
+    }
+
+    // Validate transcripts if provided
+    if (episodeArg.transcripts) {
+      for (const transcript of episodeArg.transcripts) {
+        validation.validateUrl(transcript.url, true);
+        if (!transcript.type) {
+          throw new Error('Transcript type is required');
+        }
+      }
+    }
+
+    // Validate funding links if provided
+    if (episodeArg.funding) {
+      for (const funding of episodeArg.funding) {
+        validation.validateUrl(funding.url, true);
+        if (!funding.message) {
+          throw new Error('Funding message is required');
+        }
+      }
+    }
+
+    // Validate ID uniqueness (use URL as ID if not provided)
+    const itemId = episodeArg.id || episodeArg.url;
+    if (this.itemIds.has(itemId)) {
+      throw new Error(
+        `Duplicate episode ID: ${itemId}. Each episode must have a unique ID or URL. ` +
+        `IDs should never change once published.`
+      );
+    }
+
+    this.itemIds.add(itemId);
+    this.episodes.push(episodeArg);
+    this.items.push(episodeArg); // Also add to base items array
+  }
+
+  /**
+   * Formats duration in HH:MM:SS format for iTunes
+   * @param seconds - Duration in seconds
+   * @returns Formatted duration string
+   */
+  private formatDuration(seconds: number): string {
+    const hours = Math.floor(seconds / 3600);
+    const minutes = Math.floor((seconds % 3600) / 60);
+    const secs = seconds % 60;
+
+    return `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
+  }
+
+  /**
+   * Exports the podcast feed as RSS 2.0 with iTunes and Podcast namespaces
+   * @returns RSS 2.0 XML string with podcast extensions
+   */
+  public exportPodcastRss(): string {
+    // Build RSS manually to include iTunes namespace
+    let rss = '<?xml version="1.0" encoding="UTF-8"?>\n';
+    rss += '<rss version="2.0" ';
+    rss += 'xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" ';
+    rss += 'xmlns:podcast="https://podcastindex.org/namespace/1.0" ';
+    rss += 'xmlns:atom="http://www.w3.org/2005/Atom">\n';
+    rss += '<channel>\n';
+
+    // Standard RSS fields
+    rss += `<title>${this.escapeXml(this.podcastOptions.title)}</title>\n`;
+    rss += `<link>https://${this.podcastOptions.domain}</link>\n`;
+    rss += `<description>${this.escapeXml(this.podcastOptions.description)}</description>\n`;
+    rss += `<language>${this.podcastOptions.language || 'en'}</language>\n`;
+    rss += `<copyright>${this.escapeXml(this.podcastOptions.copyright || `All rights reserved, ${this.podcastOptions.company}`)}</copyright>\n`;
+    rss += `<generator>@push.rocks/smartfeed</generator>\n`;
+    rss += `<lastBuildDate>${new Date().toUTCString()}</lastBuildDate>\n`;
+
+    // Atom self link
+    rss += `<atom:link href="https://${this.podcastOptions.domain}/feed.xml" rel="self" type="application/rss+xml" />\n`;
+
+    // iTunes channel tags
+    rss += `<itunes:author>${this.escapeXml(this.podcastOptions.itunesAuthor)}</itunes:author>\n`;
+    rss += `<itunes:summary>${this.escapeXml(this.podcastOptions.itunesSummary || this.podcastOptions.description)}</itunes:summary>\n`;
+    rss += `<itunes:explicit>${this.podcastOptions.itunesExplicit ? 'true' : 'false'}</itunes:explicit>\n`;
+    rss += `<itunes:image href="${this.podcastOptions.itunesImage}" />\n`;
+    rss += `<itunes:category text="${this.escapeXml(this.podcastOptions.itunesCategory)}"`;
+    if (this.podcastOptions.itunesSubcategory) {
+      rss += `>\n<itunes:category text="${this.escapeXml(this.podcastOptions.itunesSubcategory)}" />\n</itunes:category>\n`;
+    } else {
+      rss += ' />\n';
+    }
+    rss += `<itunes:owner>\n`;
+    rss += `<itunes:name>${this.escapeXml(this.podcastOptions.itunesOwner.name)}</itunes:name>\n`;
+    rss += `<itunes:email>${this.podcastOptions.itunesOwner.email}</itunes:email>\n`;
+    rss += `</itunes:owner>\n`;
+
+    if (this.podcastOptions.itunesType) {
+      rss += `<itunes:type>${this.podcastOptions.itunesType}</itunes:type>\n`;
+    }
+
+    // Episodes
+    for (const episode of this.episodes) {
+      rss += '<item>\n';
+      rss += `<title>${this.escapeXml(episode.title)}</title>\n`;
+      rss += `<link>${episode.url}</link>\n`;
+      rss += `<guid isPermaLink="false">${episode.id || episode.url}</guid>\n`;
+      rss += `<pubDate>${new Date(episode.timestamp).toUTCString()}</pubDate>\n`;
+      rss += `<description><![CDATA[${episode.content}]]></description>\n`;
+
+      // Audio enclosure
+      rss += `<enclosure url="${episode.audioUrl}" length="${episode.audioLength}" type="${episode.audioType}" />\n`;
+
+      // iTunes episode tags
+      rss += `<itunes:title>${this.escapeXml(episode.title)}</itunes:title>\n`;
+      rss += `<itunes:author>${this.escapeXml(episode.authorName)}</itunes:author>\n`;
+      rss += `<itunes:duration>${this.formatDuration(episode.itunesDuration)}</itunes:duration>\n`;
+      rss += `<itunes:explicit>${episode.itunesExplicit !== undefined ? (episode.itunesExplicit ? 'true' : 'false') : 'false'}</itunes:explicit>\n`;
+
+      if (episode.itunesSubtitle) {
+        rss += `<itunes:subtitle>${this.escapeXml(episode.itunesSubtitle)}</itunes:subtitle>\n`;
+      }
+
+      if (episode.itunesSummary) {
+        rss += `<itunes:summary>${this.escapeXml(episode.itunesSummary)}</itunes:summary>\n`;
+      }
+
+      if (episode.itunesEpisode !== undefined) {
+        rss += `<itunes:episode>${episode.itunesEpisode}</itunes:episode>\n`;
+      }
+
+      if (episode.itunesSeason !== undefined) {
+        rss += `<itunes:season>${episode.itunesSeason}</itunes:season>\n`;
+      }
+
+      if (episode.itunesEpisodeType) {
+        rss += `<itunes:episodeType>${episode.itunesEpisodeType}</itunes:episodeType>\n`;
+      }
+
+      rss += `<itunes:image href="${episode.imageUrl}" />\n`;
+
+      // Modern podcast namespace
+      if (episode.persons && episode.persons.length > 0) {
+        for (const person of episode.persons) {
+          rss += `<podcast:person role="${person.role || 'guest'}"`;
+          if (person.href) rss += ` href="${person.href}"`;
+          if (person.img) rss += ` img="${person.img}"`;
+          rss += `>${this.escapeXml(person.name)}</podcast:person>\n`;
+        }
+      }
+
+      if (episode.transcripts && episode.transcripts.length > 0) {
+        for (const transcript of episode.transcripts) {
+          rss += `<podcast:transcript url="${transcript.url}" type="${transcript.type}"`;
+          if (transcript.language) rss += ` language="${transcript.language}"`;
+          if (transcript.rel) rss += ` rel="${transcript.rel}"`;
+          rss += ' />\n';
+        }
+      }
+
+      if (episode.funding && episode.funding.length > 0) {
+        for (const funding of episode.funding) {
+          rss += `<podcast:funding url="${funding.url}">${this.escapeXml(funding.message)}</podcast:funding>\n`;
+        }
+      }
+
+      rss += '</item>\n';
+    }
+
+    rss += '</channel>\n';
+    rss += '</rss>';
+
+    return rss;
+  }
+
+  /**
+   * Escapes XML special characters
+   * @param str - String to escape
+   * @returns Escaped string
+   */
+  private escapeXml(str: string): string {
+    return str
+      .replace(/&/g, '&amp;')
+      .replace(/</g, '&lt;')
+      .replace(/>/g, '&gt;')
+      .replace(/"/g, '&quot;')
+      .replace(/'/g, '&apos;');
+  }
+}

ts/classes.smartfeed.ts

@@ -1,15 +1,91 @@
-import { Feed } from './smartfeed.classes.feed.js';
+import { Feed } from './classes.feed.js';
-import type { IFeedOptions } from './smartfeed.classes.feed.js';
+import type { IFeedOptions } from './classes.feed.js';
-import * as plugins from './smartfeed.plugins.js';
+import { PodcastFeed } from './classes.podcast.js';
+import type { IPodcastFeedOptions } from './classes.podcast.js';
+import * as plugins from './plugins.js';
 
+/**
+ * Main class for creating and parsing various feed formats (RSS, Atom, JSON Feed)
+ * @example
+ * ```typescript
+ * const smartfeed = new Smartfeed();
+ * const feed = smartfeed.createFeed({
+ *   domain: 'example.com',
+ *   title: 'My Blog',
+ *   description: 'A blog about technology',
+ *   category: 'Technology',
+ *   company: 'Example Inc',
+ *   companyEmail: 'hello@example.com',
+ *   companyDomain: 'https://example.com'
+ * });
+ * ```
+ */
 export class Smartfeed {
-  public createFeed(optionsArg: IFeedOptions) {
+  /**
+   * Creates a new Feed instance with the provided configuration
+   * @param optionsArg - Feed configuration options
+   * @returns A new Feed instance
+   * @throws Error if validation fails
+   * @example
+   * ```typescript
+   * const feed = smartfeed.createFeed({
+   *   domain: 'example.com',
+   *   title: 'My Blog',
+   *   description: 'Latest news and updates',
+   *   category: 'Technology',
+   *   company: 'Example Inc',
+   *   companyEmail: 'hello@example.com',
+   *   companyDomain: 'https://example.com'
+   * });
+   * ```
+   */
+  public createFeed(optionsArg: IFeedOptions): Feed {
     const feedVersion = new Feed(optionsArg);
     return feedVersion;
   }
 
   /**
-   * creates a feed from a standardized article object (@tsclass/tsclass).content.IArticle
+   * Creates a new PodcastFeed instance with iTunes and Podcast namespace support
+   * @param optionsArg - Podcast feed configuration options
+   * @returns A new PodcastFeed instance
+   * @throws Error if validation fails
+   * @example
+   * ```typescript
+   * const podcast = smartfeed.createPodcastFeed({
+   *   domain: 'podcast.example.com',
+   *   title: 'My Podcast',
+   *   description: 'An awesome podcast about tech',
+   *   category: 'Technology',
+   *   company: 'Podcast Inc',
+   *   companyEmail: 'podcast@example.com',
+   *   companyDomain: 'https://example.com',
+   *   itunesCategory: 'Technology',
+   *   itunesAuthor: 'John Doe',
+   *   itunesOwner: { name: 'John Doe', email: 'john@example.com' },
+   *   itunesImage: 'https://example.com/artwork.jpg',
+   *   itunesExplicit: false
+   * });
+   * ```
+   */
+  public createPodcastFeed(optionsArg: IPodcastFeedOptions): PodcastFeed {
+    const podcastFeed = new PodcastFeed(optionsArg);
+    return podcastFeed;
+  }
+
+  /**
+   * Creates an Atom feed from an array of standardized article objects
+   * Uses the @tsclass/tsclass IArticle interface for article format
+   * @param optionsArg - Feed configuration options
+   * @param articleArray - Array of article objects conforming to @tsclass/tsclass IArticle interface
+   * @returns Promise resolving to Atom feed XML string
+   * @throws Error if validation fails for feed options or articles
+   * @example
+   * ```typescript
+   * const feedString = await smartfeed.createFeedFromArticleArray(
+   *   feedOptions,
+   *   articles
+   * );
+   * ```
    */
   public async createFeedFromArticleArray(
     optionsArg: IFeedOptions,
@@ -31,8 +107,17 @@ export class Smartfeed {
   }
 
   /**
-   * allows the parsing of a rss feed string
+   * Parses an RSS or Atom feed from a string
-   * @param rssFeedString
+   * @param rssFeedString - The RSS/Atom feed XML string to parse
+   * @returns Promise resolving to parsed feed object
+   * @throws Error if feed parsing fails
+   * @example
+   * ```typescript
+   * const feedString = '<rss>...</rss>';
+   * const parsed = await smartfeed.parseFeedFromString(feedString);
+   * console.log(parsed.title);
+   * console.log(parsed.items);
+   * ```
    */
   public async parseFeedFromString(rssFeedString: string) {
     const parser = new plugins.rssParser();
@@ -41,8 +126,16 @@ export class Smartfeed {
   }
 
   /**
-   * allows the parsing of a feed from urls
+   * Parses an RSS or Atom feed from a URL
-   * @param urlArg
+   * @param urlArg - The absolute URL of the RSS/Atom feed
+   * @returns Promise resolving to parsed feed object
+   * @throws Error if feed fetch or parsing fails
+   * @example
+   * ```typescript
+   * const parsed = await smartfeed.parseFeedFromUrl('https://example.com/feed.xml');
+   * console.log(parsed.title);
+   * console.log(parsed.items);
+   * ```
    */
   public async parseFeedFromUrl(urlArg: string) {
     const parser = new plugins.rssParser();

ts/index.ts

@@ -1,2 +1,16 @@
-export * from './smartfeed.classes.smartfeed.js';
+// Export classes
-export * from './smartfeed.classes.feed.js';
+export * from './classes.smartfeed.js';
+export * from './classes.feed.js';
+export * from './classes.podcast.js';
+
+// Ensure interfaces are explicitly exported
+export type { IFeedOptions, IFeedItem } from './classes.feed.js';
+export type {
+  IPodcastFeedOptions,
+  IPodcastItem,
+  IPodcastOwner,
+  IPodcastPerson,
+  IPodcastChapter,
+  IPodcastTranscript,
+  IPodcastFunding,
+} from './classes.podcast.js';