Added support for <source:markdown>

Sources/FeedKit/FeedNamespace.swift

@@ -60,6 +60,9 @@ enum FeedNamespace: CaseIterable {
   /// Represents the Podcast namespace, used for podcast-specific metadata
   /// and extensions in podcast feeds.
   case podcast
+  /// Represents the source namespace, used for Source-specific metadata
+  /// like markdown content.
+  case source
 
   // MARK: Internal
 
@@ -86,6 +89,8 @@ enum FeedNamespace: CaseIterable {
       "xmlns:atom"
     case .podcast:
       "xmlns:podcast"
+    case .source:
+      "xmlns:source"
     }
   }
 
@@ -112,6 +117,8 @@ enum FeedNamespace: CaseIterable {
       "http://www.w3.org/2005/Atom"
     case .podcast:
       "https://podcastindex.org/namespace/1.0"
+    case .source:
+      "http://source.scripting.com/"
     }
   }
 }
@@ -156,6 +163,9 @@ extension FeedNamespace {
     case .podcast:
       feed.channel?.podcast != nil ||
         feed.channel?.items?.contains(where: { $0.podcast != nil }) ?? false
+
+    case .source:
+      feed.channel?.items?.contains(where: { $0.markdown != nil }) ?? false
     }
   }
 

Sources/FeedKit/Feeds/RSS/RSSFeedItem.swift

@@ -38,6 +38,7 @@ public struct RSSFeedItem {
     title: String? = nil,
     link: String? = nil,
     description: String? = nil,
+    markdown: String? = nil,
     author: String? = nil,
     categories: [RSSFeedCategory]? = nil,
     comments: String? = nil,
@@ -55,6 +56,7 @@ public struct RSSFeedItem {
     self.title = title
     self.link = link
     self.description = description
+    self.markdown = markdown
     self.author = author
     self.categories = categories
     self.comments = comments
@@ -89,6 +91,11 @@ public struct RSSFeedItem {
   /// Cinema was being staged.
   public var description: String?
 
+  /// The markdown content for the item.
+  ///
+  /// Example: ## Highlights
+  public var markdown: String?
+
   /// Email address of the author of the item.
   ///
   /// Example: oprah\@oxygen.net
@@ -254,6 +261,7 @@ extension RSSFeedItem: Codable {
     case title
     case link
     case description
+    case markdown = "source:markdown"
     case author
     case category
     case comments
@@ -275,6 +283,7 @@ extension RSSFeedItem: Codable {
     title = try container.decodeIfPresent(String.self, forKey: CodingKeys.title)
     link = try container.decodeIfPresent(String.self, forKey: CodingKeys.link)
     description = try container.decodeIfPresent(String.self, forKey: CodingKeys.description)
+    markdown = try container.decodeIfPresent(String.self, forKey: CodingKeys.markdown)
     author = try container.decodeIfPresent(String.self, forKey: CodingKeys.author)
     categories = try container.decodeIfPresent([RSSFeedCategory].self, forKey: CodingKeys.category)
     comments = try container.decodeIfPresent(String.self, forKey: CodingKeys.comments)
@@ -296,6 +305,7 @@ extension RSSFeedItem: Codable {
     try container.encodeIfPresent(title, forKey: CodingKeys.title)
     try container.encodeIfPresent(link, forKey: CodingKeys.link)
     try container.encodeIfPresent(description, forKey: CodingKeys.description)
+    try container.encodeIfPresent(markdown, forKey: CodingKeys.markdown)
     try container.encodeIfPresent(author, forKey: CodingKeys.author)
     try container.encodeIfPresent(categories, forKey: CodingKeys.category)
     try container.encodeIfPresent(comments, forKey: CodingKeys.comments)

Tests/FeedKitTests/Resources/xml/RSS.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<rss version="2.0">
+<rss version="2.0" xmlns:source="http://source.scripting.com/">
   <channel>
     <title>Iris</title>
     <link>http://www.iris.news/</link>
@@ -50,6 +50,10 @@
       <category domain="rec.arts.movies.reviews">1983/V</category>
       <comments>http://dallas.example.com/feedback/1983/06/joebob.htm</comments>
       <description>I'm headed for France. I wasn't gonna go this year, but then last week "Valley Girl" came out and I said to myself, Joe Bob, you gotta get out of the country for a while.</description>
+      <source:markdown><![CDATA[## Highlights
+
+- Traveled to France.
+- Talked about "Valley Girl".]]></source:markdown>
       <enclosure length="24986239" type="audio/mpeg" url="http://dallas.example.com/joebob_050689.mp3" />
       <guid isPermaLink="false">tag:dallas.example.com,4131:news</guid>
       <pubDate>Fri, 05 Oct 2007 09:00:00 CST</pubDate>

Tests/FeedKitTests/Tests/RSSTests + Mocks.swift

@@ -93,6 +93,7 @@ extension RSSTests {
             title: "Seventh Heaven! Ryan Hurls Another No Hitter",
             link: "http://dallas.example.com/1991/05/02/nolan.htm",
             description: "I'm headed for France. I wasn't gonna go this year, but then last week \"Valley Girl\" came out and I said to myself, Joe Bob, you gotta get out of the country for a while.",
+            markdown: "## Highlights\n\n- Traveled to France.\n- Talked about \"Valley Girl\".",
             author: "jbb@dallas.example.com (Joe Bob Briggs)",
             categories: [
               .init(