MLModel: Add delete method

SharedSources/MediaLibraryModel/AlbumModel.swift

@@ -29,6 +29,10 @@ class AlbumModel: MLBaseModel {
     func append(_ item: VLCMLAlbum) {
         files.append(item)
     }
+
+    func delete(_ items: [VLCMLObject]) {
+        preconditionFailure("AlbumModel: Cannot delete album")
+    }
 }
 
 extension AlbumModel: MediaLibraryObserver {

SharedSources/MediaLibraryModel/ArtistModel.swift

@@ -29,6 +29,10 @@ class ArtistModel: MLBaseModel {
     func append(_ item: VLCMLArtist) {
         files.append(item)
     }
+
+    func delete(_ items: [VLCMLObject]) {
+        preconditionFailure("ArtistModel: Cannot delete artist")
+    }
 }
 
 extension ArtistModel: MediaLibraryObserver {

SharedSources/MediaLibraryModel/AudioModel.swift

@@ -29,6 +29,18 @@ class AudioModel: MLBaseModel {
     func append(_ item: VLCMLMedia) {
         files.append(item)
     }
+
+    func delete(_ items: [VLCMLObject]) {
+        do {
+            for case let media as VLCMLMedia in items {
+                try FileManager.default.removeItem(atPath: media.mainFile().mrl.path)
+            }
+            medialibrary.reload()
+        }
+        catch let error as NSError {
+            assertionFailure("VideoModel: Delete failed: \(error.localizedDescription)")
+        }
+    }
 }
 
 // MARK: - Sort

SharedSources/MediaLibraryModel/GenreModel.swift

@@ -29,6 +29,10 @@ class GenreModel: MLBaseModel {
     func append(_ item: VLCMLGenre) {
         files.append(item)
     }
+
+    func delete(_ items: [VLCMLObject]) {
+        preconditionFailure("GenreModel: Cannot delete genre")
+    }
 }
 
 extension GenreModel: MediaLibraryObserver {

SharedSources/MediaLibraryModel/MediaLibraryBaseModel.swift

@@ -20,6 +20,7 @@ protocol MediaLibraryBaseModel {
     var indicatorName: String { get }
 
     func append(_ item: VLCMLObject)
+    func delete(_ items: [VLCMLObject])
     func sort(by criteria: VLCMLSortingCriteria)
 }
 
@@ -37,6 +38,8 @@ protocol MLBaseModel: MediaLibraryBaseModel {
     var indicatorName: String { get }
 
     func append(_ item: MLType)
+    // FIXME: Ideally items should be MLType but Swift isn't happy so it will always fail
+    func delete(_ items: [VLCMLObject])
     func sort(by criteria: VLCMLSortingCriteria)
 }
 
@@ -49,6 +52,10 @@ extension MLBaseModel {
         fatalError()
     }
 
+    func delete(_ items: [VLCMLObject]) {
+        fatalError()
+    }
+
     func sort(by criteria: VLCMLSortingCriteria) {
         fatalError()
     }

SharedSources/MediaLibraryModel/ShowEpisodeModel.swift

@@ -28,6 +28,10 @@ class ShowEpisodeModel: MLBaseModel {
     func append(_ item: VLCMLMedia) {
         files.append(item)
     }
+
+    func delete(_ items: [VLCMLObject]) {
+        preconditionFailure("ShowEpisodeModel: Cannot delete showEpisode")
+    }
 }
 
 extension ShowEpisodeModel: MediaLibraryObserver {

SharedSources/MediaLibraryModel/VideoModel.swift

@@ -29,6 +29,18 @@ class VideoModel: MLBaseModel {
     func append(_ item: VLCMLMedia) {
         files.append(item)
     }
+
+    func delete(_ items: [VLCMLObject]) {
+        do {
+            for case let media as VLCMLMedia in items {
+                try FileManager.default.removeItem(atPath: media.mainFile().mrl.path)
+            }
+            medialibrary.reload()
+        }
+        catch let error as NSError {
+            assertionFailure("VideoModel: Delete failed: \(error.localizedDescription)")
+        }
+    }
 }
 
 // MARK: - Sort