Add displayTitle and displayAuthor to playback session

server/objects/mediaTypes/Book.js

@@ -408,5 +408,13 @@ class Book {
 
     return tracklist
   }
+
+  getPlaybackTitle() {
+    return this.metadata.title
+  }
+
+  getPlaybackAuthor() {
+    return this.metadata.authorName
+  }
 }
 module.exports = Book

server/objects/mediaTypes/Podcast.js

@@ -213,5 +213,15 @@ class Podcast {
   removeEpisode(episodeId) {
     this.episodes = this.episodes.filter(ep => ep.id !== episodeId)
   }
+
+  getPlaybackTitle(episodeId) {
+    var episode = this.episodes.find(ep => ep.id == episodeId)
+    if (!episode) return this.metadata.title
+    return episode.title
+  }
+
+  getPlaybackAuthor() {
+    return this.metadata.author
+  }
 }
 module.exports = Podcast