Completely rejigger preferences system to use ReSwift

Persephone.xcodeproj/project.pbxproj

@@ -17,7 +17,6 @@
 		E408D3BE220E03EE0006D9BE /* RawRepresentable.swift in Sources */ = {isa = PBXBuildFile; fileRef = E408D3BD220E03EE0006D9BE /* RawRepresentable.swift */; };
 		E408D3C2220E134F0006D9BE /* AlbumViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = E408D3C1220E134F0006D9BE /* AlbumViewController.swift */; };
 		E408D3CB220E341D0006D9BE /* AlbumViewItem.xib in Resources */ = {isa = PBXBuildFile; fileRef = E408D3C9220E341D0006D9BE /* AlbumViewItem.xib */; };
-		E40F41F3221EDE27004B6CB8 /* Preferences.swift in Sources */ = {isa = PBXBuildFile; fileRef = E40F41F2221EDE27004B6CB8 /* Preferences.swift */; };
 		E40FE71B221B904300A4223F /* NSEvent.swift in Sources */ = {isa = PBXBuildFile; fileRef = E40FE71A221B904300A4223F /* NSEvent.swift */; };
 		E419E2872249B96600216A8C /* Song.swift in Sources */ = {isa = PBXBuildFile; fileRef = E419E2862249B96600216A8C /* Song.swift */; };
 		E41B22C621FB932700D544F6 /* MPDClient.swift in Sources */ = {isa = PBXBuildFile; fileRef = E41B22C521FB932700D544F6 /* MPDClient.swift */; };
@@ -39,6 +38,7 @@
 		E435E3E2221CD4E200184CFC /* NSFont.swift in Sources */ = {isa = PBXBuildFile; fileRef = E435E3E1221CD4E200184CFC /* NSFont.swift */; };
 		E435E3E4221CD75D00184CFC /* NSImage.swift in Sources */ = {isa = PBXBuildFile; fileRef = E435E3E3221CD75D00184CFC /* NSImage.swift */; };
 		E439109822640213002982E9 /* SongNotifierService.swift in Sources */ = {isa = PBXBuildFile; fileRef = E439109722640213002982E9 /* SongNotifierService.swift */; };
+		E4405192227644340090CD6F /* MPDServerController.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4405191227644340090CD6F /* MPDServerController.swift */; };
 		E450AD7E222620A10091BED3 /* Album.swift in Sources */ = {isa = PBXBuildFile; fileRef = E450AD7D222620A10091BED3 /* Album.swift */; };
 		E450AD8F22262C620091BED3 /* PromiseKit.framework.dSYM in Resources */ = {isa = PBXBuildFile; fileRef = E450AD8E22262C620091BED3 /* PromiseKit.framework.dSYM */; };
 		E450AD9122262C780091BED3 /* SwiftyJSON.framework.dSYM in Resources */ = {isa = PBXBuildFile; fileRef = E450AD9022262C780091BED3 /* SwiftyJSON.framework.dSYM */; };
@@ -108,6 +108,10 @@
 		E4F6B460221E119B00ACF42A /* QueueDataSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4F6B45F221E119B00ACF42A /* QueueDataSource.swift */; };
 		E4F6B463221E125900ACF42A /* QueueItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4F6B462221E125900ACF42A /* QueueItem.swift */; };
 		E4F6B467221E233200ACF42A /* AlbumDataSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4F6B466221E233200ACF42A /* AlbumDataSource.swift */; };
+		E4FF718E2276010E00D4C412 /* PreferencesState.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4FF718D2276010E00D4C412 /* PreferencesState.swift */; };
+		E4FF7190227601B400D4C412 /* PreferencesReducer.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4FF718F227601B400D4C412 /* PreferencesReducer.swift */; };
+		E4FF71922276029000D4C412 /* PreferencesActions.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4FF71912276029000D4C412 /* PreferencesActions.swift */; };
+		E4FF71942276043A00D4C412 /* MPDServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4FF71932276043A00D4C412 /* MPDServer.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -175,7 +179,6 @@
 		E408D3BD220E03EE0006D9BE /* RawRepresentable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RawRepresentable.swift; sourceTree = "<group>"; };
 		E408D3C1220E134F0006D9BE /* AlbumViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AlbumViewController.swift; sourceTree = "<group>"; };
 		E408D3C9220E341D0006D9BE /* AlbumViewItem.xib */ = {isa = PBXFileReference; lastKnownFileType = file.xib; path = AlbumViewItem.xib; sourceTree = "<group>"; };
-		E40F41F2221EDE27004B6CB8 /* Preferences.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Preferences.swift; sourceTree = "<group>"; };
 		E40FE71A221B904300A4223F /* NSEvent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NSEvent.swift; sourceTree = "<group>"; };
 		E419E2862249B96600216A8C /* Song.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Song.swift; sourceTree = "<group>"; };
 		E41B22BF21FB6BBA00D544F6 /* libmpdclient.2.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = libmpdclient.2.dylib; path = libmpdclient/output/libmpdclient.2.dylib; sourceTree = "<group>"; };
@@ -235,6 +238,7 @@
 		E435E3E1221CD4E200184CFC /* NSFont.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NSFont.swift; sourceTree = "<group>"; };
 		E435E3E3221CD75D00184CFC /* NSImage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NSImage.swift; sourceTree = "<group>"; };
 		E439109722640213002982E9 /* SongNotifierService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SongNotifierService.swift; sourceTree = "<group>"; };
+		E4405191227644340090CD6F /* MPDServerController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MPDServerController.swift; sourceTree = "<group>"; };
 		E450AD7D222620A10091BED3 /* Album.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Album.swift; sourceTree = "<group>"; };
 		E450AD8522262AE60091BED3 /* SwiftyJSON.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SwiftyJSON.framework; path = Carthage/Build/Mac/SwiftyJSON.framework; sourceTree = "<group>"; };
 		E450AD8C22262C590091BED3 /* PromiseKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = PromiseKit.framework; path = Carthage/Build/Mac/PromiseKit.framework; sourceTree = "<group>"; };
@@ -296,6 +300,10 @@
 		E4F6B45F221E119B00ACF42A /* QueueDataSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QueueDataSource.swift; sourceTree = "<group>"; };
 		E4F6B462221E125900ACF42A /* QueueItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QueueItem.swift; sourceTree = "<group>"; };
 		E4F6B466221E233200ACF42A /* AlbumDataSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AlbumDataSource.swift; sourceTree = "<group>"; };
+		E4FF718D2276010E00D4C412 /* PreferencesState.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesState.swift; sourceTree = "<group>"; };
+		E4FF718F227601B400D4C412 /* PreferencesReducer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesReducer.swift; sourceTree = "<group>"; };
+		E4FF71912276029000D4C412 /* PreferencesActions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesActions.swift; sourceTree = "<group>"; };
+		E4FF71932276043A00D4C412 /* MPDServer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MPDServer.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -361,7 +369,6 @@
 			isa = PBXGroup;
 			children = (
 				E4B11BAE2274F7030075461B /* Protocols */,
-				E4B11B6B226A5AF50075461B /* Actions */,
 				E407861B2110CE6E006887B1 /* AppDelegate.swift */,
 				E407861F2110CE70006887B1 /* Assets.xcassets */,
 				E4D1B597220BA3A20026F233 /* Controllers */,
@@ -376,7 +383,6 @@
 				E40786252110CE70006887B1 /* Persephone.entitlements */,
 				E450AD9E2229B9BC0091BED3 /* PersephoneBridgingHeader.h */,
 				E4A83BEC2221F5DD0098FED6 /* Preferences */,
-				E4B11B5F226A4BED0075461B /* Reducers */,
 				E4D1B598220BA3C90026F233 /* Resources */,
 				E4A83BF2222207BE0098FED6 /* Services */,
 				E4B11B64226A4F460075461B /* State */,
@@ -591,6 +597,7 @@
 				E4B11B62226A4C510075461B /* AppReducer.swift */,
 				E4B11B74226CC4D30075461B /* QueueReducer.swift */,
 				E4B11B78226D346B0075461B /* AlbumListReducer.swift */,
+				E4FF718F227601B400D4C412 /* PreferencesReducer.swift */,
 			);
 			path = Reducers;
 			sourceTree = "<group>";
@@ -598,10 +605,13 @@
 		E4B11B64226A4F460075461B /* State */ = {
 			isa = PBXGroup;
 			children = (
+				E4B11B6B226A5AF50075461B /* Actions */,
+				E4B11B5F226A4BED0075461B /* Reducers */,
 				E4B11B52226928F20075461B /* AppState.swift */,
 				E4B11B65226A4F830075461B /* PlayerState.swift */,
 				E4B11B67226A4FA00075461B /* QueueState.swift */,
 				E4B11B69226A4FBC0075461B /* AlbumListState.swift */,
+				E4FF718D2276010E00D4C412 /* PreferencesState.swift */,
 			);
 			path = State;
 			sourceTree = "<group>";
@@ -612,6 +622,7 @@
 				E4B11BC12275EE410075461B /* AlbumListActions.swift */,
 				E4B11BBD2275EDAA0075461B /* PlayerActions.swift */,
 				E4B11BBF2275EE150075461B /* QueueActions.swift */,
+				E4FF71912276029000D4C412 /* PreferencesActions.swift */,
 			);
 			path = Actions;
 			sourceTree = "<group>";
@@ -655,6 +666,7 @@
 				E4E8CC912204F4B80024217A /* QueueViewController.swift */,
 				E465049921E94DF500A70F4C /* WindowController.swift */,
 				E4B11BB52275374B0075461B /* UserNotificationsController.swift */,
+				E4405191227644340090CD6F /* MPDServerController.swift */,
 			);
 			path = Controllers;
 			sourceTree = "<group>";
@@ -682,7 +694,7 @@
 			children = (
 				E450AD7D222620A10091BED3 /* Album.swift */,
 				E4B11BA82274EDE30075461B /* Loading.swift */,
-				E40F41F2221EDE27004B6CB8 /* Preferences.swift */,
+				E4FF71932276043A00D4C412 /* MPDServer.swift */,
 				E4F6B462221E125900ACF42A /* QueueItem.swift */,
 				E419E2862249B96600216A8C /* Song.swift */,
 				E47E2FDC2220A6D100F747E6 /* Time.swift */,
@@ -877,6 +889,7 @@
 				E4B11BB62275374B0075461B /* UserNotificationsController.swift in Sources */,
 				E4B11B68226A4FA00075461B /* QueueState.swift in Sources */,
 				E4928E0B2218D62A001D4BEA /* CGColor.swift in Sources */,
+				E4405192227644340090CD6F /* MPDServerController.swift in Sources */,
 				E4C8B53E22349002009A20F3 /* MPDIdle.swift in Sources */,
 				E4F6B460221E119B00ACF42A /* QueueDataSource.swift in Sources */,
 				E4C8B53C22342005009A20F3 /* PreferencesWindowController.swift in Sources */,
@@ -896,15 +909,17 @@
 				E45962C62241A78500FC1A1E /* MPDCommand.swift in Sources */,
 				E408D3B9220DE98F0006D9BE /* NSUserInterfaceItemIdentifier.swift in Sources */,
 				E4EB2379220F10B8008C70C0 /* MPDPair.swift in Sources */,
+				E4FF7190227601B400D4C412 /* PreferencesReducer.swift in Sources */,
 				E4F6B463221E125900ACF42A /* QueueItem.swift in Sources */,
 				E4A83BF12221FAA00098FED6 /* PreferencesViewController.swift in Sources */,
 				E4B11BC22275EE410075461B /* AlbumListActions.swift in Sources */,
 				E4B11B61226A4C000075461B /* PlayerReducer.swift in Sources */,
+				E4FF71922276029000D4C412 /* PreferencesActions.swift in Sources */,
 				E465049A21E94DF500A70F4C /* WindowController.swift in Sources */,
 				E41B22C621FB932700D544F6 /* MPDClient.swift in Sources */,
-				E40F41F3221EDE27004B6CB8 /* Preferences.swift in Sources */,
 				E47E2FDD2220A6D100F747E6 /* Time.swift in Sources */,
 				E419E2872249B96600216A8C /* Song.swift in Sources */,
+				E4FF718E2276010E00D4C412 /* PreferencesState.swift in Sources */,
 				E439109822640213002982E9 /* SongNotifierService.swift in Sources */,
 				E407861C2110CE6E006887B1 /* AppDelegate.swift in Sources */,
 				E4B11B75226CC4D30075461B /* QueueReducer.swift in Sources */,
@@ -925,6 +940,7 @@
 				E408D3BE220E03EE0006D9BE /* RawRepresentable.swift in Sources */,
 				E4B11B66226A4F830075461B /* PlayerState.swift in Sources */,
 				E4B11BBE2275EDAA0075461B /* PlayerActions.swift in Sources */,
+				E4FF71942276043A00D4C412 /* MPDServer.swift in Sources */,
 				E41E530E223EF4CF00173814 /* CoverArtService+Caching.swift in Sources */,
 				E4E8CC922204F4B80024217A /* QueueViewController.swift in Sources */,
 				E41E5312223EF74A00173814 /* CoverArtService+Filesystem.swift in Sources */,

Persephone/AppDelegate.swift

@@ -14,9 +14,9 @@ import MediaKeyTap
 class AppDelegate: NSObject,
                    NSApplicationDelegate,
                    MediaKeyTapDelegate {
-  var preferences = Preferences()
   var mediaKeyTap: MediaKeyTap?
-  var userNotificationsController: UserNotificationsController?
+  var userNotificationsController = UserNotificationsController()
+  var mpdServerController = MPDServerController()
 
   static let mpdClient = MPDClient(
     withDelegate: NotificationsController()
@@ -27,38 +27,18 @@ class AppDelegate: NSObject,
   static let store = Store<AppState>(reducer: appReducer, state: nil)
 
   func applicationDidFinishLaunching(_ aNotification: Notification) {
-    connect()
+    mpdServerController.connect()
-
-    preferences.addObserver(self, forKeyPath: "mpdHost")
-    preferences.addObserver(self, forKeyPath: "mpdPort")
 
     mediaKeyTap = MediaKeyTap(delegate: self)
     mediaKeyTap?.start()
 
     AppDelegate.store.subscribe(self) {
-      $0.select { $0.playerState }
+      $0.select { $0.playerState.databaseUpdating }
     }
-
-    userNotificationsController = UserNotificationsController()
   }
 
   func applicationWillTerminate(_ aNotification: Notification) {
-    disconnect()
+    mpdServerController.disconnect()
-  }
-
-  override func observeValue(
-    forKeyPath keyPath: String?,
-    of object: Any?,
-    change: [NSKeyValueChangeKey : Any]?,
-    context: UnsafeMutableRawPointer?
-  ) {
-    switch keyPath {
-    case "mpdHost", "mpdPort":
-      disconnect()
-      connect()
-    default:
-      break
-    }
   }
 
   func handle(mediaKey: MediaKey, event: KeyEvent) {
@@ -72,17 +52,6 @@ class AppDelegate: NSObject,
     }
   }
 
-  func connect() {
-    AppDelegate.mpdClient.connect(
-      host: preferences.mpdHostOrDefault,
-      port: preferences.mpdPortOrDefault
-    )
-  }
-
-  func disconnect() {
-    AppDelegate.mpdClient.disconnect()
-  }
-
   @IBAction func updateDatabase(_ sender: NSMenuItem) {
     AppDelegate.mpdClient.updateDatabase()
   }
@@ -91,9 +60,9 @@ class AppDelegate: NSObject,
 }
 
 extension AppDelegate: StoreSubscriber {
-  typealias StoreSubscriberStateType = PlayerState
+  typealias StoreSubscriberStateType = Bool
 
-  func newState(state: PlayerState) {
+  func newState(state: Bool) {
-    updateDatabaseMenuItem.isEnabled = !state.databaseUpdating
+    updateDatabaseMenuItem.isEnabled = !state
   }
 }

Persephone/Controllers/AlbumViewController.swift

@@ -13,8 +13,6 @@ import Differ
 class AlbumViewController: NSViewController,
                            NSCollectionViewDelegate,
                            NSCollectionViewDelegateFlowLayout {
-  var preferences = Preferences()
-
   let paddingWidth: CGFloat = 40
   let gutterWidth: CGFloat = 20
 
@@ -31,8 +29,8 @@ class AlbumViewController: NSViewController,
 
     albumCollectionView.dataSource = dataSource
 
-    preferences.addObserver(self, forKeyPath: "mpdLibraryDir")
+//    preferences.addObserver(self, forKeyPath: "mpdLibraryDir")
-    preferences.addObserver(self, forKeyPath: "fetchMissingArtworkFromInternet")
+//    preferences.addObserver(self, forKeyPath: "fetchMissingArtworkFromInternet")
   }
 
   override func viewWillDisappear() {

Persephone/Controllers/MPDServerController.swift

@@ -0,0 +1,38 @@
+//
+//  MPDServerController.swift
+//  Persephone
+//
+//  Created by Daniel Barber on 2019/4/28.
+//  Copyright © 2019 Dan Barber. All rights reserved.
+//
+
+import Foundation
+import ReSwift
+
+class MPDServerController {
+  init() {
+    AppDelegate.store.subscribe(self) {
+      $0.select { $0.preferencesState.mpdServer }
+    }
+  }
+
+  func connect() {
+    AppDelegate.mpdClient.connect(
+      host: AppDelegate.store.state.preferencesState.mpdServer.hostOrDefault,
+      port: AppDelegate.store.state.preferencesState.mpdServer.portOrDefault
+    )
+  }
+
+  func disconnect() {
+    AppDelegate.mpdClient.disconnect()
+  }
+}
+
+extension MPDServerController: StoreSubscriber {
+  typealias StoreSubscriberStateType = MPDServer
+
+  func newState(state: MPDServer) {
+    disconnect()
+    connect()
+  }
+}

Persephone/Models/MPDServer.swift

@@ -0,0 +1,33 @@
+//
+//  MPDServer.swift
+//  Persephone
+//
+//  Created by Daniel Barber on 2019/4/28.
+//  Copyright © 2019 Dan Barber. All rights reserved.
+//
+
+import Foundation
+
+struct MPDServer {
+  let hostDefault = "127.0.0.1"
+  let portDefault = 6600
+
+  var host: String?
+
+  var hostOrDefault: String {
+    return host ?? hostDefault
+  }
+
+  var port: Int?
+
+  var portOrDefault: Int {
+    return port ?? portDefault
+  }
+}
+
+extension MPDServer: Equatable {
+  static func == (lhs: MPDServer, rhs: MPDServer) -> Bool {
+    return (lhs.host == rhs.host) &&
+      (lhs.port == rhs.port)
+  }
+}

Persephone/Models/Preferences.swift

@@ -1,77 +0,0 @@
-//
-//  Preferences.swift
-//  Persephone
-//
-//  Created by Daniel Barber on 2019/2/15.
-//  Copyright © 2019 Dan Barber. All rights reserved.
-//
-
-import Foundation
-
-struct Preferences {
-  let mpdHostDefault = "127.0.0.1"
-  let mpdPortDefault = 6600
-  let mpdLibraryDirDefault = "~/Music"
-
-  let preferences = UserDefaults.standard
-
-  var mpdHost: String? {
-    get {
-      return preferences.string(forKey: "mpdHost")
-    }
-    set {
-      preferences.set(newValue, forKey: "mpdHost")
-    }
-  }
-
-  var mpdHostOrDefault: String {
-    return mpdHost ?? mpdHostDefault
-  }
-
-  var mpdPort: Int? {
-    get {
-      return preferences.value(forKey: "mpdPort") as? Int
-    }
-    set {
-      if (newValue.map { $0 > 0 } ?? false) {
-        preferences.set(newValue, forKey: "mpdPort")
-      } else {
-        preferences.removeObject(forKey: "mpdPort")
-      }
-    }
-  }
-
-  var mpdPortOrDefault: Int {
-    return mpdPort ?? mpdPortDefault
-  }
-
-  var mpdLibraryDir: String? {
-    get {
-      return preferences.string(forKey: "mpdLibraryDir")
-    }
-    set {
-      preferences.set(newValue, forKey: "mpdLibraryDir")
-    }
-  }
-
-  var mpdLibraryDirOrDefault: String {
-    return mpdLibraryDir ?? mpdLibraryDirDefault
-  }
-
-  var expandedMpdLibraryDir: String {
-    return NSString(string: mpdLibraryDirOrDefault).expandingTildeInPath
-  }
-
-  var fetchMissingArtworkFromInternet: Bool {
-    get {
-      return preferences.bool(forKey: "fetchMissingArtworkFromInternet")
-    }
-    set {
-      preferences.set(newValue, forKey: "fetchMissingArtworkFromInternet")
-    }
-  }
-
-  func addObserver(_ observer: NSObject, forKeyPath keyPath: String) {
-    preferences.addObserver(observer, forKeyPath: keyPath, options: .new, context: nil)
-  }
-}

Persephone/Preferences/Controllers/CoverArtPrefsController.swift

@@ -9,16 +9,14 @@
 import Cocoa
 
 class CoverArtPrefsController: NSViewController {
-  var preferences = Preferences()
-
   override func viewDidLoad() {
     super.viewDidLoad()
 
-    if let mpdLibraryDir = preferences.mpdLibraryDir {
+    if let mpdLibraryDir = AppDelegate.store.state.preferencesState.mpdLibraryDir {
       mpdLibraryDirField.stringValue = mpdLibraryDir
     }
 
-    if preferences.fetchMissingArtworkFromInternet {
+    if AppDelegate.store.state.preferencesState.fetchMissingArtworkFromInternet {
       fetchMissingArtworkFromInternet.state = .on
     } else {
       fetchMissingArtworkFromInternet.state = .off
@@ -36,17 +34,17 @@ class CoverArtPrefsController: NSViewController {
   }
 
   @IBAction func updateMpdLibraryDir(_ sender: NSTextField) {
-    preferences.mpdLibraryDir = sender.stringValue
+    AppDelegate.store.dispatch(UpdateMPDLibraryDir(mpdLibraryDir: sender.stringValue))
   }
 
   @IBOutlet var mpdLibraryDirField: NSTextField!
 
   @IBAction func updateFetchMissingArtworkFromInternet(_ sender: NSButton) {
-    if sender.state == .on {
+    AppDelegate.store.dispatch(
-      preferences.fetchMissingArtworkFromInternet = true
+      UpdateFetchMissingArtworkFromInternet(
-    } else {
+        fetchMissingArtworkFromInternet: sender.state == .on
-      preferences.fetchMissingArtworkFromInternet = false
+      )
-    }
+    )
   }
 
   @IBOutlet var fetchMissingArtworkFromInternet: NSButton!

Persephone/Preferences/Controllers/GeneralPrefsViewController.swift

@@ -7,18 +7,18 @@
 //
 
 import Cocoa
+import ReSwift
 
 class GeneralPrefsViewController: NSViewController {
-  var preferences = Preferences()
-
   override func viewDidLoad() {
     super.viewDidLoad()
 
-    if let mpdHost = preferences.mpdHost {
+    if let mpdHost = AppDelegate.store.state.preferencesState.mpdServer.host {
       mpdHostField.stringValue = mpdHost
     }
 
-    if let mpdPort = preferences.mpdPort {
+    if let mpdPort = AppDelegate.store.state.preferencesState.mpdServer.port {
+      print(mpdPort)
       mpdPortField.stringValue = "\(mpdPort)"
     }
 
@@ -34,11 +34,11 @@ class GeneralPrefsViewController: NSViewController {
   }
 
   @IBAction func updateMpdHost(_ sender: NSTextField) {
-    preferences.mpdHost = sender.stringValue
+    AppDelegate.store.dispatch(UpdateServerHost(host: sender.stringValue))
   }
 
   @IBAction func updateMpdPort(_ sender: NSTextField) {
-    preferences.mpdPort = sender.integerValue
+    AppDelegate.store.dispatch(UpdateServerPort(port: sender.integerValue))
   }
 
   @IBOutlet var mpdHostField: NSTextField!

Persephone/Preferences/Controllers/PreferencesWindowController.swift

@@ -14,6 +14,7 @@ class PreferencesWindowController: NSWindowController, NSWindowDelegate {
   }
 
   func windowShouldClose(_ sender: NSWindow) -> Bool {
+    AppDelegate.store.dispatch(SavePreferences())
     self.window?.orderOut(sender)
     return false
   }

Persephone/Resources/AlbumViewItem.xib

@@ -39,7 +39,7 @@
                 </textField>
                 <imageView identifier="albumArtwork" horizontalHuggingPriority="251" verticalHuggingPriority="251" horizontalCompressionResistancePriority="250" verticalCompressionResistancePriority="250" translatesAutoresizingMaskIntoConstraints="NO" id="Kfb-8f-ean">
                     <rect key="frame" x="0.0" y="39" width="128" height="128"/>
-                    <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyUpOrDown" image="blankAlbum" id="FsA-JX-BFh"/>
+                    <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyUpOrDown" image="defaultCoverArt" id="FsA-JX-BFh"/>
                 </imageView>
                 <button hidden="YES" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="n8W-do-HyG">
                     <rect key="frame" x="43" y="81" width="42" height="43"/>
@@ -79,7 +79,7 @@
         <collectionViewItem id="Qgu-aI-55A" customClass="AlbumViewItem" customModule="Persephone" customModuleProvider="target"/>
     </objects>
     <resources>
-        <image name="blankAlbum" width="128" height="128"/>
+        <image name="defaultCoverArt" width="128" height="128"/>
         <image name="playButtonLarge" width="22" height="22"/>
     </resources>
 </document>

Persephone/Services/CoverArtService.swift

@@ -10,7 +10,6 @@ import Cocoa
 import PromiseKit
 
 class CoverArtService {
-  var preferences = Preferences()
   let song: Song
   let album: Album
 

Persephone/Services/Extensions/CoverArtService+Filesystem.swift

@@ -19,7 +19,7 @@ extension CoverArtService {
   }
 
   var musicDir: String {
-    return self.preferences.expandedMpdLibraryDir
+    return AppDelegate.store.state.preferencesState.expandedMpdLibraryDir
   }
 
   func getArtworkFromFilesystem() -> Promise<NSImage?> {
@@ -48,7 +48,7 @@ extension CoverArtService {
   }
 
   func fileSystemArtworkFilePath() -> String? {
-    let musicDir = self.preferences.expandedMpdLibraryDir
+    let musicDir = AppDelegate.store.state.preferencesState.expandedMpdLibraryDir
 
     return self.coverArtFilenames
       .lazy

Persephone/Services/Extensions/CoverArtService+Remote.swift

@@ -19,7 +19,7 @@ extension CoverArtService {
 
   func getRemoteArtwork() -> Promise<NSImage?> {
     return Promise { seal in
-      if preferences.fetchMissingArtworkFromInternet {
+      if AppDelegate.store.state.preferencesState .fetchMissingArtworkFromInternet {
         coverArtQueue.async {
           let coverArtWorkItem = DispatchWorkItem {
             self.getArtworkFromMusicBrainz().map(Optional.some).pipe(to: seal.resolve)

Persephone/State/Actions/PreferencesActions.swift

@@ -0,0 +1,27 @@
+//
+//  PreferencesActions.swift
+//  Persephone
+//
+//  Created by Daniel Barber on 2019/4/28.
+//  Copyright © 2019 Dan Barber. All rights reserved.
+//
+
+import ReSwift
+
+struct UpdateServerHost: Action {
+  var host: String?
+}
+
+struct UpdateServerPort: Action {
+  var port: Int?
+}
+
+struct UpdateMPDLibraryDir: Action {
+  var mpdLibraryDir: String?
+}
+
+struct UpdateFetchMissingArtworkFromInternet: Action {
+  var fetchMissingArtworkFromInternet: Bool
+}
+
+struct SavePreferences: Action {}

Persephone/State/AppState.swift

@@ -12,4 +12,5 @@ struct AppState: StateType {
   var playerState = PlayerState()
   var queueState = QueueState()
   var albumListState = AlbumListState()
+  var preferencesState = PreferencesState()
 }

Persephone/State/PreferencesState.swift

@@ -0,0 +1,51 @@
+//
+//  PreferencesState.swift
+//  Persephone
+//
+//  Created by Daniel Barber on 2019/4/28.
+//  Copyright © 2019 Dan Barber. All rights reserved.
+//
+
+import Foundation
+import ReSwift
+
+struct PreferencesState: StateType {
+  let preferences = UserDefaults.standard
+
+  var mpdServer: MPDServer
+  let mpdLibraryDirDefault = "~/Music"
+
+  var mpdLibraryDir: String?
+
+  var mpdLibraryDirOrDefault: String {
+    return mpdLibraryDir ?? mpdLibraryDirDefault
+  }
+
+  var expandedMpdLibraryDir: String {
+    return NSString(string: mpdLibraryDirOrDefault).expandingTildeInPath
+  }
+
+  var fetchMissingArtworkFromInternet: Bool
+
+  init() {
+    self.mpdServer = MPDServer(
+      host: preferences.string(forKey: "mpdHost"),
+      port: preferences.value(forKey: "mpdPort") as? Int
+    )
+    self.mpdLibraryDir = preferences.string(forKey: "mpdLibraryDir")
+    self.fetchMissingArtworkFromInternet = preferences.bool(
+      forKey: "fetchMissingArtworkFromInternet"
+    )
+  }
+
+  func save() {
+    preferences.set(mpdServer.host, forKey: "mpdHost")
+    if (mpdServer.port.map { $0 > 0 } ?? false) {
+      preferences.set(mpdServer.port, forKey: "mpdPort")
+    } else {
+      preferences.removeObject(forKey: "mpdPort")
+    }
+    preferences.set(mpdLibraryDir, forKey: "mpdLibraryDir")
+    preferences.set(fetchMissingArtworkFromInternet, forKey: "fetchMissingArtworkFromInternet")
+  }
+}

Persephone/State/Reducers/AppReducer.swift

@@ -12,6 +12,7 @@ func appReducer(action: Action, state: AppState?) -> AppState {
   return AppState(
     playerState: playerReducer(action: action, state: state?.playerState),
     queueState: queueReducer(action: action, state: state?.queueState),
-    albumListState: albumListReducer(action: action, state: state?.albumListState)
+    albumListState: albumListReducer(action: action, state: state?.albumListState),
+    preferencesState: preferencesReducer(action: action, state: state?.preferencesState)
   )
 }

Persephone/State/Reducers/PreferencesReducer.swift

@@ -0,0 +1,34 @@
+//
+//  PreferencesReducer.swift
+//  Persephone
+//
+//  Created by Daniel Barber on 2019/4/28.
+//  Copyright © 2019 Dan Barber. All rights reserved.
+//
+
+import Foundation
+import ReSwift
+
+func preferencesReducer(action: Action, state: PreferencesState?) -> PreferencesState {
+
+  var state = state ?? PreferencesState()
+
+  switch action {
+  case let action as UpdateServerHost:
+    state.mpdServer.host = action.host
+
+  case let action as UpdateServerPort:
+    state.mpdServer.port = action.port
+
+  case let action as UpdateMPDLibraryDir:
+    state.mpdLibraryDir = action.mpdLibraryDir
+
+  case is SavePreferences:
+    state.save()
+
+  default:
+    break
+  }
+
+  return state
+}