Add Podcast RSS feeds (#5487)

* Initial test implementation of Podcast RSS

This is a pretty simple implementation to add support for The Podcast Namespace in RSS -- instead of affecting the existing RSS implementation, this adds a new UI option.

I attempted to retain compatibility with the rest of the RSS feed implementation as much as possible and have created a temporary fork of the "pfeed" library to support this effort.

* Update to pfeed-podcast 1.2.2

* Initial test implementation of Podcast RSS

This is a pretty simple implementation to add support for The Podcast Namespace in RSS -- instead of affecting the existing RSS implementation, this adds a new UI option.

I attempted to retain compatibility with the rest of the RSS feed implementation as much as possible and have created a temporary fork of the "pfeed" library to support this effort.

* Update to pfeed-podcast 1.2.2

* Initial test implementation of Podcast RSS

This is a pretty simple implementation to add support for The Podcast Namespace in RSS -- instead of affecting the existing RSS implementation, this adds a new UI option.

I attempted to retain compatibility with the rest of the RSS feed implementation as much as possible and have created a temporary fork of the "pfeed" library to support this effort.

* Update to pfeed-podcast 1.2.2

* Add correct feed image to RSS channel

* Prefer HLS videos for podcast RSS

Remove video/stream titles, add optional height attribute to podcast RSS

* Prefix podcast RSS images with root server URL

* Add optional video query support to include captions

* Add transcripts & person images to podcast RSS feed

* Prefer webseed/webtorrent files over HLS fragmented mp4s

* Experimentally adding podcast fields to basic config page

* Add validation for new basic config fields

* Don't include "content" in podcast feed, use full description for "description"

* Initial test implementation of Podcast RSS

This is a pretty simple implementation to add support for The Podcast Namespace in RSS -- instead of affecting the existing RSS implementation, this adds a new UI option.

I attempted to retain compatibility with the rest of the RSS feed implementation as much as possible and have created a temporary fork of the "pfeed" library to support this effort.

* Update to pfeed-podcast 1.2.2

* Add correct feed image to RSS channel

* Prefer HLS videos for podcast RSS

Remove video/stream titles, add optional height attribute to podcast RSS

* Prefix podcast RSS images with root server URL

* Add optional video query support to include captions

* Add transcripts & person images to podcast RSS feed

* Prefer webseed/webtorrent files over HLS fragmented mp4s

* Experimentally adding podcast fields to basic config page

* Add validation for new basic config fields

* Don't include "content" in podcast feed, use full description for "description"

* Add medium/socialInteract to podcast RSS feeds. Use HTML for description

* Change base production image to bullseye, install prosody in image

* Add liveItem and trackers to Podcast RSS feeds

Remove height from alternateEnclosure, replaced with title.

* Clear Podcast RSS feed cache when live streams start/end

* Upgrade to Node 16

* Refactor clearCacheRoute to use ApiCache

* Remove unnecessary type hint

* Update dockerfile to node 16, install python-is-python2

* Use new file paths for captions/playlists

* Fix legacy videos in RSS after migration to object storage

* Improve method of identifying non-fragmented mp4s in podcast RSS feeds

* Don't include fragmented MP4s in podcast RSS feeds

* Add experimental support for podcast:categories on the podcast RSS item

* Fix undefined category when no videos exist

Allows for empty feeds to exist (important for feeds that might only go live)

* Add support for podcast:locked -- user has to opt in to show their email

* Use comma for podcast:categories delimiter

* Make cache clearing async

* Fix merge, temporarily test with pfeed-podcast

* Syntax changes

* Add EXT_MIMETYPE constants for captions

* Update & fix tests, fix enclosure mimetypes, remove admin email

* Add test for podacst:socialInteract

* Add filters hooks for podcast customTags

* Remove showdown, updated to pfeed-podcast 6.1.2

* Add 'action:api.live-video.state.updated' hook

* Avoid assigning undefined category to podcast feeds

* Remove nvmrc

* Remove comment

* Remove unused podcast config

* Remove more unused podcast config

* Fix MChannelAccountDefault type hint missed in merge

* Remove extra line

* Re-add newline in config

* Fix lint errors for isEmailPublic

* Fix thumbnails in podcast feeds

* Requested changes based on review

* Provide podcast rss 2.0 only on video channels

* Misc cleanup for a less messy PR

* Lint fixes

* Remove pfeed-podcast

* Add peertube version to new hooks

* Don't use query include, remove TODO

* Remove film medium hack

* Clear podcast rss cache before video/channel update hooks

* Clear podcast rss cache before video uploaded/deleted hooks

* Refactor podcast feed cache clearing

* Set correct person name from video channel

* Styling

* Fix tests

---------

Co-authored-by: Chocobozzz <me@florianbigard.com>

3 files changed, 102 insertions, 0 deletions

diff --git a/server/tests/fixtures/peertube-plugin-test-podcast-custom-tags/main.js b/server/tests/fixtures/peertube-plugin-test-podcast-custom-tags/main.js
new file mode 100644
index 000000000..ada4a70fe
--- /dev/null
+++ b/server/tests/fixtures/peertube-plugin-test-podcast-custom-tags/main.js
@@ -0,0 +1,82 @@
+async function register ({ registerHook, registerSetting, settingsManager, storageManager, peertubeHelpers }) {
+  registerHook({
+    target: 'filter:feed.podcast.rss.create-custom-xmlns.result',
+    handler: (result, params) => {
+      return result.concat([
+        {
+          name: "biz",
+          value: "https://example.com/biz-xmlns",
+        },
+      ])
+    }
+  })
+
+  registerHook({
+    target: 'filter:feed.podcast.channel.create-custom-tags.result',
+    handler: (result, params) => {
+      const { videoChannel } = params
+      return result.concat([
+        {
+          name: "fooTag",
+          attributes: { "bar": "baz" },
+          value: "42",
+        },
+        {
+          name: "biz:videoChannel",
+          attributes: { "name": videoChannel.name, "id": videoChannel.id },
+        },
+        {
+          name: "biz:buzzItem",
+          value: [
+            {
+              name: "nestedTag",
+              value: "example nested tag",
+            },
+          ],
+        },
+      ])
+    }
+  })
+
+  registerHook({
+    target: 'filter:feed.podcast.video.create-custom-tags.result',
+    handler: (result, params) => {
+      const { video, liveItem } = params
+      return result.concat([
+        {
+          name: "fizzTag",
+          attributes: { "bar": "baz" },
+          value: "21",
+        },
+        {
+          name: "biz:video",
+          attributes: { "name": video.name, "id": video.id, "isLive": liveItem },
+        },
+        {
+          name: "biz:buzz",
+          value: [
+            {
+              name: "nestedTag",
+              value: "example nested tag",
+            },
+          ],
+        }
+      ])
+    }
+  })
+}
+
+async function unregister () {
+  return
+}
+
+module.exports = {
+  register,
+  unregister
+}
+
+// ############################################################################
+
+function addToCount (obj) {
+  return Object.assign({}, obj, { count: obj.count + 1 })
+}
diff --git a/server/tests/fixtures/peertube-plugin-test-podcast-custom-tags/package.json b/server/tests/fixtures/peertube-plugin-test-podcast-custom-tags/package.json
new file mode 100644
index 000000000..0f5a05a79
--- /dev/null
+++ b/server/tests/fixtures/peertube-plugin-test-podcast-custom-tags/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "peertube-plugin-test-podcast-custom-tags",
+  "version": "0.0.1",
+  "description": "Plugin test custom tags in Podcast RSS feeds",
+  "engine": {
+    "peertube": ">=1.3.0"
+  },
+  "keywords": [
+    "peertube",
+    "plugin"
+  ],
+  "homepage": "https://github.com/Chocobozzz/PeerTube",
+  "author": "Chocobozzz",
+  "bugs": "https://github.com/Chocobozzz/PeerTube/issues",
+  "library": "./main.js",
+  "staticDirs": {},
+  "css": [],
+  "clientScripts": []
+}
diff --git a/server/tests/fixtures/peertube-plugin-test/main.js b/server/tests/fixtures/peertube-plugin-test/main.js
index 36dd08d27..17032f6d9 100644
--- a/server/tests/fixtures/peertube-plugin-test/main.js
+++ b/server/tests/fixtures/peertube-plugin-test/main.js
@@ -14,6 +14,7 @@ async function register ({ registerHook, registerSetting, settingsManager, stora
       'action:api.video-channel.deleted',
 
       'action:api.live-video.created',
+      'action:live.video.state.updated',
 
       'action:api.video-thread.created',
       'action:api.video-comment-reply.created',