Ensure artwork is fetched when the pref is changed

Persephone/Controllers/AlbumViewController.swift

@@ -40,6 +40,7 @@ class AlbumViewController: NSViewController,
     albumCollectionView.dataSource = dataSource
 
     preferences.addObserver(self, forKeyPath: "mpdLibraryDir")
+    preferences.addObserver(self, forKeyPath: "fetchMissingArtworkFromInternet")
   }
 
   override func viewWillLayout() {
@@ -66,6 +67,9 @@ class AlbumViewController: NSViewController,
     switch keyPath {
     case "mpdLibraryDir":
       albumCollectionView.reloadData()
+    case "fetchMissingArtworkFromInternet":
+      dataSource.resetCoverArt()
+      albumCollectionView.reloadData()
     default:
       break
     }
@@ -75,7 +79,7 @@ class AlbumViewController: NSViewController,
     guard let albums = notification.userInfo?[Notification.albumsKey] as? [MPDClient.MPDAlbum]
       else { return }
 
-    dataSource.albums = albums.map { Album(mpdAlbum: $0, coverArt: nil) }
+    dataSource.albums = albums.map { Album(mpdAlbum: $0) }
     albumCollectionView.reloadData()
   }
 

Persephone/Controllers/QueueViewController.swift

@@ -72,11 +72,11 @@ class QueueViewController: NSViewController,
 
       albumArtService.fetchBigAlbumArt()
         .done() {
-          guard let image = $0 else { return }
-
-          self.queueAlbumArtImage.image = image.toFitBox(
-            size: NSSize(width: 500, height: 500)
-          )
+          if let image = $0 {
+            self.queueAlbumArtImage.image = image
+          } else {
+            self.queueAlbumArtImage.image = NSImage.defaultCoverArt
+          }
         }
         .cauterize()
     } else {

Persephone/DataSources/AlbumDataSource.swift

@@ -16,6 +16,14 @@ class AlbumDataSource: NSObject, NSCollectionViewDataSource {
     return albums.count
   }
 
+  func resetCoverArt() {
+    albums = albums.map {
+      var album = $0
+      album.coverArtFetched = false
+      return album
+    }
+  }
+
   func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
     let item = collectionView.makeItem(withIdentifier: .albumViewItem, for: indexPath)
     guard let albumViewItem = item as? AlbumViewItem else { return item }
@@ -23,7 +31,9 @@ class AlbumDataSource: NSObject, NSCollectionViewDataSource {
     albumViewItem.view.wantsLayer = true
     albumViewItem.setAlbum(albums[indexPath.item])
 
-    if albums[indexPath.item].coverArt == nil {
+    if albums[indexPath.item].coverArt == nil &&
+      !albums[indexPath.item].coverArtFetched {
+
       AppDelegate.mpdClient.getAlbumFirstSong(for: albums[indexPath.item].mpdAlbum) {
         guard let song = $0 else { return }
         
@@ -31,6 +41,7 @@ class AlbumDataSource: NSObject, NSCollectionViewDataSource {
           .fetchAlbumArt()
           .done { image in
             self.albums[indexPath.item].coverArt = image
+            self.albums[indexPath.item].coverArtFetched = true
 
             DispatchQueue.main.async {
               collectionView.reloadItems(at: [indexPath])

Persephone/Extensions/String.swift

@@ -1,24 +0,0 @@
-//
-//  String.swift
-//  Persephone
-//
-//  Created by Daniel Barber on 2019/3/01.
-//  Copyright © 2019 Dan Barber. All rights reserved.
-//
-
-import Foundation
-
-extension String {
-  func sha1() -> String {
-    let data = self.data(using: String.Encoding.utf8)!
-    var digest = [UInt8](repeating: 0, count:Int(CC_SHA1_DIGEST_LENGTH))
-
-    data.withUnsafeBytes {
-      _ = CC_SHA1($0, CC_LONG(data.count), &digest)
-    }
-
-    let hexBytes = digest.map { String(format: "%02hhx", $0) }
-
-    return hexBytes.joined()
-  }
-}

Persephone/Models/Song.swift

@@ -20,6 +20,6 @@ struct Song {
   }
 
   var album: Album {
-    return Album(mpdAlbum: mpdSong.album, coverArt: nil)
+    return Album(mpdAlbum: mpdSong.album)
   }
 }

Persephone/Services/AlbumArtService.swift

@@ -42,6 +42,8 @@ class AlbumArtService {
       } else {
         return image
       }
+    }.recover { (_) -> Guarantee<NSImage?> in
+      return .value(nil)
     }
   }
 
@@ -54,13 +56,7 @@ class AlbumArtService {
       artwork.map(Promise.value) ?? self.getRemoteArtwork()
     }.compactMap(on: artworkQueue) {
       return self.sizeAndCacheImage($0).map(Optional.some)
-    }.recover { error in
-      switch error {
-      case RemoteArtworkError.noArtworkAvailable:
-        self.cacheArtwork(data: Data())
-      default:
-        break
-      }
+    }.recover { _ in
       return .value(nil)
     }
   }