Persephone/Controllers/AlbumViewController.swift

@@ -11,8 +11,6 @@ import Cocoa
 class AlbumViewController: NSViewController,
                            NSCollectionViewDelegate,
                            NSCollectionViewDelegateFlowLayout {
-  var preferences = Preferences()
-
   let paddingWidth: CGFloat = 40
   let gutterWidth: CGFloat = 20
 
@@ -38,8 +36,6 @@ class AlbumViewController: NSViewController,
     )
 
     albumCollectionView.dataSource = dataSource
-
-    preferences.addObserver(self, forKeyPath: "mpdLibraryDir")
   }
 
   override func viewWillLayout() {
@@ -57,20 +53,6 @@ class AlbumViewController: NSViewController,
     layout.setScrollPosition()
   }
 
-  override func observeValue(
-    forKeyPath keyPath: String?,
-    of object: Any?,
-    change: [NSKeyValueChangeKey : Any]?,
-    context: UnsafeMutableRawPointer?
-    ) {
-    switch keyPath {
-    case "mpdLibraryDir":
-      albumCollectionView.reloadData()
-    default:
-      break
-    }
-  }
-
   @objc func updateAlbums(_ notification: Notification) {
     guard let albums = notification.userInfo?[Notification.albumsKey] as? [MPDClient.Album]
       else { return }

Persephone/Controllers/QueueViewController.swift

@@ -36,7 +36,7 @@ class QueueViewController: NSViewController,
     let newQueuePos = queueView.selectedRow - 1
 
     if newQueuePos >= 0 {
-      AppDelegate.mpdClient.playTrack(at: newQueuePos)
+      AppDelegate.mpdClient.playTrack(queuePos: newQueuePos)
     }
   }
 

Persephone/Extensions/NSImage.swift

@@ -13,24 +13,4 @@ extension NSImage {
   static let pauseIcon = NSImage(named: "pauseButton")
 
   static let defaultCoverArt = NSImage(named: "blankAlbum")
-
-  func toFitBox(size: NSSize) -> NSImage {
-    let newImage = NSImage(size: size)
-    newImage.lockFocus()
-    self.draw(in: newImage.alignmentRect)
-    newImage.unlockFocus()
-    return newImage
-  }
-
-  func jpegData(compressionQuality: CGFloat) -> Data? {
-    guard let image = cgImage(forProposedRect: nil, context: nil, hints: nil)
-      else { return nil }
-
-    let bitmapImageRep = NSBitmapImageRep(cgImage: image)
-
-    return bitmapImageRep.representation(
-      using: .jpeg,
-      properties: [.compressionFactor: compressionQuality]
-    )
-  }
 }

Persephone/MPDClient/Extensions/MPDClient+Album.swift

@@ -18,12 +18,8 @@ extension MPDClient {
     queueCommand(command: .playAlbum, userData: ["album": album])
   }
 
-  func getAlbumURI(for album: Album, callback: @escaping (String?) -> Void) {
-    queueCommand(
-      command: .getAlbumURI,
-      priority: .low,
-      userData: ["album": album, "callback": callback]
-    )
+  func getAlbumURI(for album: Album) {
+    queueCommand(command: .getAlbumURI, userData: ["album": album])
   }
 
   func sendPlayAlbum(_ album: Album) {
@@ -69,31 +65,30 @@ extension MPDClient {
     self.delegate?.didLoadAlbums(mpdClient: self, albums: albums)
   }
 
-  func albumURI(for album: Album, callback: (String?) -> Void) {
+  func albumURI(for album: Album) -> String? {
     var songURI: String?
 
-    guard isConnected else { return }
+    guard isConnected else { return nil }
 
+    print("Getting URI")
     mpd_search_db_songs(self.connection, true)
     mpd_search_add_tag_constraint(self.connection, MPD_OPERATOR_DEFAULT, MPD_TAG_ALBUM, album.title)
     mpd_search_add_tag_constraint(self.connection, MPD_OPERATOR_DEFAULT, MPD_TAG_ALBUM_ARTIST, album.artist)
     mpd_search_add_tag_constraint(self.connection, MPD_OPERATOR_DEFAULT, MPD_TAG_TRACK, "1")
 
     mpd_search_commit(self.connection)
+    print("Performed search")
 
     while let mpdSong = mpd_recv_song(self.connection) {
       let song = Song(mpdSong)
+      print(song)
 
       if songURI == nil {
         songURI = song.uriString
       }
     }
+    print("Got URI")
 
-    callback(
-      songURI?
-        .split(separator: "/")
-        .dropLast()
-        .joined(separator: "/")
-    )
+    return songURI
   }
 }

Persephone/MPDClient/Extensions/MPDClient+Command.swift

@@ -24,22 +24,12 @@ extension MPDClient {
       sendStop()
     case .playPause:
       sendPlay()
-    case .seekCurrentSong:
-      guard let timeInSeconds = userData["timeInSeconds"] as? Float
-        else { return }
-      sendSeekCurrentSong(timeInSeconds: timeInSeconds)
 
     // Status commands
     case .fetchStatus:
       sendRunStatus()
-
-    // Queue commands
     case .fetchQueue:
       sendFetchQueue()
-    case .playTrack:
-      guard let queuePos = userData["queuePos"] as? Int
-        else { return }
-      sendPlayTrack(at: queuePos)
 
     // Album commands
     case .fetchAllAlbums:
@@ -48,10 +38,8 @@ extension MPDClient {
       guard let album = userData["album"] as? Album else { return }
       sendPlayAlbum(album)
     case .getAlbumURI:
-      guard let album = userData["album"] as? Album,
-        let callback = userData["callback"] as? (String?) -> Void
-        else { return }
-      albumURI(for: album, callback: callback)
+      guard let album = userData["album"] as? Album else { return }
+      _ = getAlbumURI(for: album)
     }
   }
 }

Persephone/MPDClient/Extensions/MPDClient+Idle.swift

@@ -18,13 +18,17 @@ extension MPDClient {
   }
 
   func idle() {
-    if !self.isIdle && self.commandsQueued == 0 {
-      mpd_send_idle(self.connection)
-      self.isIdle = true
+    let idleOperation = BlockOperation {
+      if !self.isIdle && self.commandsQueued == 0 {
+        mpd_send_idle(self.connection)
+        self.isIdle = true
 
-      let result = mpd_recv_idle(self.connection, true)
-      self.handleIdleResult(result)
+        let result = mpd_recv_idle(self.connection, true)
+        self.handleIdleResult(result)
+      }
     }
+    idleOperation.queuePriority = .veryLow
+    commandQueue.addOperation(idleOperation)
   }
 
   func handleIdleResult(_ result: mpd_idle) {

Persephone/MPDClient/Extensions/MPDClient+Queue.swift

@@ -14,12 +14,16 @@ extension MPDClient {
     sendCommand(command: .fetchQueue)
   }
 
-  func playTrack(at queuePos: Int) {
-    queueCommand(command: .playTrack, userData: ["queuePos": queuePos])
-  }
+  func playTrack(queuePos: Int) {
+    guard isConnected else { return }
 
-  func sendPlayTrack(at queuePos: Int) {
-    mpd_run_play_pos(self.connection, UInt32(queuePos))
+    noIdle()
+    let commandOperation = BlockOperation { [unowned self] in
+      mpd_run_play_pos(self.connection, UInt32(queuePos))
+    }
+    commandOperation.queuePriority = .veryHigh
+    commandQueue.addOperation(commandOperation)
+    idle()
   }
 
   func sendFetchQueue() {

Persephone/MPDClient/Extensions/MPDClient+Transport.swift

@@ -27,10 +27,11 @@ extension MPDClient {
   }
 
   func seekCurrentSong(timeInSeconds: Float) {
-    queueCommand(
-      command: .seekCurrentSong,
-      userData: ["timeInSeconds": timeInSeconds]
-    )
+    noIdle()
+    commandQueue.addOperation { [unowned self] in
+      mpd_run_seek_current(self.connection, timeInSeconds, false)
+    }
+    idle()
   }
 
   func sendNextTrack() {
@@ -61,7 +62,4 @@ extension MPDClient {
     }
   }
 
-  func sendSeekCurrentSong(timeInSeconds: Float) {
-    mpd_run_seek_current(self.connection, timeInSeconds, false)
-  }
 }

Persephone/MPDClient/MPDClient.swift

@@ -22,8 +22,8 @@ class MPDClient {
   var commandsQueued: UInt = 0
 
   enum Command {
-    case prevTrack, nextTrack, playPause, stop, seekCurrentSong,
-      fetchStatus, fetchQueue, playTrack, fetchAllAlbums,
+    case prevTrack, nextTrack, playPause, stop,
+      fetchStatus, fetchQueue, fetchAllAlbums,
       playAlbum, getAlbumURI
   }
 
@@ -40,15 +40,13 @@ class MPDClient {
     guard isConnected else { return }
 
     noIdle()
-
     let commandOperation = BlockOperation() { [unowned self] in
       self.commandsQueued -= 1
       self.sendCommand(command: command, userData: userData)
-
-      self.idle()
     }
     commandOperation.queuePriority = priority
     commandsQueued += 1
     commandQueue.addOperation(commandOperation)
+    idle()
   }
 }

Persephone/Models/Preferences.swift

@@ -58,10 +58,6 @@ struct Preferences {
     return mpdLibraryDir ?? mpdLibraryDirDefault
   }
 
-  var expandedMpdLibraryDir: String {
-    return NSString(string: mpdLibraryDirOrDefault).expandingTildeInPath
-  }
-
   func addObserver(_ observer: NSObject, forKeyPath keyPath: String) {
     preferences.addObserver(observer, forKeyPath: keyPath, options: .new, context: nil)
   }

Persephone/Services/AlbumArtService.swift

@@ -13,16 +13,18 @@ import PMKFoundation
 
 class AlbumArtService: NSObject {
   static var shared = AlbumArtService()
-  var preferences = Preferences()
 
   var session = URLSession(configuration: .default)
   let cacheQueue = DispatchQueue(label: "albumArtCacheQueue", attributes: .concurrent)
+  let filesystemQueue = DispatchQueue(label: "albumArtFilesystemQueue", attributes: .concurrent)
 
   func fetchAlbumArt(for album: AlbumItem, callback: @escaping (_ image: NSImage) -> Void) {
     cacheQueue.async { [unowned self] in
       //print("Trying cache")
       if !self.getCachedArtwork(for: album, callback: callback) {
-        self.getArtworkFromFilesystem(for: album, callback: callback)
+//        self.filesystemQueue.async {
+//          _ = self.getArtworkFromFilesystem(for: album, callback: callback)
+//        }
 //        if !self.getArtworkFromFilesystem(for: album, callback: callback) {
 //          // self.getRemoteArtwork(for: album, callback: callback)
 //        }
@@ -51,48 +53,14 @@ class AlbumArtService: NSObject {
     }
   }
 
-  func getArtworkFromFilesystem(
-    for album: AlbumItem,
-    callback: @escaping (_ image: NSImage) -> Void
-  ) {
-    let coverArtFilenames = [
-      "folder.jpg",
-      "cover.jpg",
-      "\(album.artist) - \(album.title).jpg"
-    ]
-
-    AppDelegate.mpdClient.getAlbumURI(
-      for: album.album,
-      callback: { (_ albumURI: String?) in
-        guard let albumURI = albumURI
-          else { return }
-
-        let musicDir = self.preferences.expandedMpdLibraryDir
-        let fullAlbumURI = "\(musicDir)/\(albumURI)"
-
-        for coverArtFilename in coverArtFilenames {
-          let coverArtURI = "\(fullAlbumURI)/\(coverArtFilename)"
-
-          if FileManager.default.fileExists(atPath: coverArtURI),
-            let data = FileManager.default.contents(atPath: coverArtURI),
-            let image = NSImage(data: data) {
-
-            let imageThumb = image.toFitBox(
-              size: NSSize(width: 180, height: 180)
-            )
-            self.cacheArtwork(
-              for: album,
-              data: imageThumb.jpegData(compressionQuality: 0.5)
-            )
-            callback(imageThumb)
-            break
-          }
-        }
-      }
-    )
+  func getArtworkFromFilesystem(for album: AlbumItem, callback: @escaping (_ image: NSImage) -> Void) -> Bool {
+    print("No cache trying filesystem")
+    let uri = AppDelegate.mpdClient.getAlbumURI(for: album.album)
+    print(uri)
+    return false
   }
 
-  func cacheArtwork(for album: AlbumItem, data: Data?) {
+  func cacheArtwork(for album: AlbumItem, data: Data) {
     guard let bundleIdentifier = Bundle.main.bundleIdentifier,
       let cacheDir = try? FileManager.default.url(for: .cachesDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
         .appendingPathComponent(bundleIdentifier)