playlists and DLNA playback

scribblings/rkt-web-player.scrbl

@@ -27,6 +27,7 @@ browser by Racket's web server.
           [#:listen-ip listen-ip string? "127.0.0.1"]
           [#:port port exact-positive-integer? 8080]
           [#:dlna-port dlna-port exact-positive-integer? 8734]
+          [#:playlist-keystore playlist-keystore (or/c path-string? #f)]
           [#:launch-browser? launch-browser? boolean? #t]) any/c] {
 
 Treats every entry in @racket[music-paths] as a separate music library. A
@@ -39,7 +40,11 @@ contents are browsed one level at a time. Metadata and recursive contents are
 only read when the user adds or plays a selected item.
 
 The @racket[dlna-port] is used to publish local audio files to a selected
-network renderer. Player resources are closed when the web server exits.
+network renderer. Playlist tabs are atomically persisted in
+@racket[playlist-keystore]; @racket[#f] disables playlist persistence. Player
+resources are closed when the web server exits. The default is
+@tt{data/playlists.keystore} below the installed rkt-web-player collection.
+Each username owns an ordered GUID index and separate playlist values.
 
 The default listen address only exposes the interface to the local computer.
 Use a LAN address deliberately if other devices should control the player.