Add reader podcast extensions docs

Signed-off-by: Tim Goudriaan <[email protected]>

docs/book/extensions/podcast-index.md

@@ -0,0 +1,24 @@
+# Podcast Index Extension
+
+The Podcast Index Extension adds support for the [Podcast Index RSS namespace](https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md),
+an open source project which consolidates new features for podcasts into a 
+single namespace.
+
+Channel API methods:
+
+Method | Description
+------ | -----------
+`isLocked()` | Returns whether the feed is open for importing to new platforms.
+`getLockOwner()` | Returns the email address for owner verification.
+`getFunding()` | Returns funding information. The output is an object with "url" and "value" properties.
+
+Item API methods:
+
+Method | Description
+------ | -----------
+`getTranscript()` | Returns transcript information for the entry. The output is an object with "url", "type", "language" and "rel" properties/
+`getChapters()` | Returns chapter information for the entry. The output is an object with "url" and "type" properties.
+`getSoundbites()` | Returns soundbites for the entry. The output is an array of objects with "title", "startTime" and "duration" properties.
+
+See the [Podcast Index website](https://podcastindex.org) for more information
+about the project.

docs/book/reader.md

@@ -569,7 +569,7 @@ Slash | Implements support for the Slash RSS 1.0 module.
 WellFormedWeb | Implements support for the Well Formed Web CommentAPI 1.0.
 Thread | Implements support for Atom Threading Extensions as described in RFC 4685.
 Podcast | Implements support for the Podcast 1.0 DTD from Apple.
-PodcastIndex | Implements support for the Podcast Index 1.0 RSS namespace.
+[PodcastIndex](extensions/podcast-index.md) | Implements support for the Podcast Index 1.0 RSS namespace.
 GooglePlayPodcast | Implements support for the Google Play Podcasts 1.0 DTD from Google.
 
 The core extensions are somewhat special since they are extremely common and

mkdocs.yml

@@ -15,6 +15,8 @@ nav:
         - Security: security.md
     - Writer: writer.md
     - Pubsubhubbub: pubsubhubbub.md
+    - Extensions:
+        - 'Podcast Index': extensions/podcast-index.md
 site_name: laminas-feed
 site_description: 'Consume and generate Atom and RSS feeds, and interact with Pubsubhubbub.'
 repo_url: 'https://github.com/laminas/laminas-feed'