Add the ability to export skins

osu.Game/Beatmaps/BeatmapManager.cs

@@ -27,7 +27,6 @@ using osu.Game.Online.API.Requests;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
 using Decoder = osu.Game.Beatmaps.Formats.Decoder;
-using ZipArchive = SharpCompress.Archives.Zip.ZipArchive;
 
 namespace osu.Game.Beatmaps
 {
@@ -66,7 +65,6 @@ namespace osu.Game.Beatmaps
         private readonly AudioManager audioManager;
         private readonly GameHost host;
         private readonly BeatmapOnlineLookupQueue onlineLookupQueue;
-        private readonly Storage exportStorage;
 
         public BeatmapManager(Storage storage, IDatabaseContextFactory contextFactory, RulesetStore rulesets, IAPIProvider api, AudioManager audioManager, GameHost host = null,
                               WorkingBeatmap defaultBeatmap = null)
@@ -83,7 +81,6 @@ namespace osu.Game.Beatmaps
             beatmaps.BeatmapRestored += b => beatmapRestored.Value = new WeakReference<BeatmapInfo>(b);
 
             onlineLookupQueue = new BeatmapOnlineLookupQueue(api, storage);
-            exportStorage = storage.GetStorageForDirectory("exports");
         }
 
         protected override ArchiveDownloadRequest<BeatmapSetInfo> CreateDownloadRequest(BeatmapSetInfo set, bool minimiseDownloadSize) =>
@@ -214,26 +211,6 @@ namespace osu.Game.Beatmaps
                 workingCache.Remove(working);
         }
 
-        /// <summary>
-        /// Exports a <see cref="BeatmapSetInfo"/> to an .osz package.
-        /// </summary>
-        /// <param name="set">The <see cref="BeatmapSetInfo"/> to export.</param>
-        public void Export(BeatmapSetInfo set)
-        {
-            var localSet = QueryBeatmapSet(s => s.ID == set.ID);
-
-            using (var archive = ZipArchive.Create())
-            {
-                foreach (var file in localSet.Files)
-                    archive.AddEntry(file.Filename, Files.Storage.GetStream(file.FileInfo.StoragePath));
-
-                using (var outputStream = exportStorage.GetStream($"{set}.osz", FileAccess.Write, FileMode.Create))
-                    archive.SaveTo(outputStream);
-
-                exportStorage.OpenInNativeExplorer();
-            }
-        }
-
         private readonly WeakList<WorkingBeatmap> workingCache = new WeakList<WorkingBeatmap>();
 
         /// <summary>

osu.Game/Database/ArchiveModelManager.cs

@@ -22,6 +22,7 @@ using osu.Game.IO.Archives;
 using osu.Game.IPC;
 using osu.Game.Overlays.Notifications;
 using osu.Game.Utils;
+using SharpCompress.Archives.Zip;
 using SharpCompress.Common;
 using FileInfo = osu.Game.IO.FileInfo;
 
@@ -82,6 +83,8 @@ namespace osu.Game.Database
         // ReSharper disable once NotAccessedField.Local (we should keep a reference to this so it is not finalised)
         private ArchiveImportIPCChannel ipc;
 
+        private readonly Storage exportStorage;
+
         protected ArchiveModelManager(Storage storage, IDatabaseContextFactory contextFactory, MutableDatabaseBackedStoreWithFileIncludes<TModel, TFileModel> modelStore, IIpcHost importHost = null)
         {
             ContextFactory = contextFactory;
@@ -90,6 +93,8 @@ namespace osu.Game.Database
             ModelStore.ItemAdded += item => handleEvent(() => itemAdded.Value = new WeakReference<TModel>(item));
             ModelStore.ItemRemoved += item => handleEvent(() => itemRemoved.Value = new WeakReference<TModel>(item));
 
+            exportStorage = storage.GetStorageForDirectory("exports");
+
             Files = new FileStore(contextFactory, storage);
 
             if (importHost != null)
@@ -369,6 +374,29 @@ namespace osu.Game.Database
             return item;
         }, cancellationToken, TaskCreationOptions.HideScheduler, import_scheduler).Unwrap();
 
+        /// <summary>
+        /// Exports an item to an legacy (.zip based) package.
+        /// </summary>
+        /// <param name="item">The item to export.</param>
+        public void Export(TModel item)
+        {
+            var retrievedItem = ModelStore.ConsumableItems.FirstOrDefault(s => s.ID == item.ID);
+
+            if (retrievedItem == null)
+                throw new ArgumentException("Specified model count not be found", nameof(item));
+
+            using (var archive = ZipArchive.Create())
+            {
+                foreach (var file in retrievedItem.Files)
+                    archive.AddEntry(file.Filename, Files.Storage.GetStream(file.FileInfo.StoragePath));
+
+                using (var outputStream = exportStorage.GetStream($"{item}{HandledExtensions.First()}", FileAccess.Write, FileMode.Create))
+                    archive.SaveTo(outputStream);
+
+                exportStorage.OpenInNativeExplorer();
+            }
+        }
+
         public void UpdateFile(TModel model, TFileModel file, Stream contents)
         {
             using (var usage = ContextFactory.GetForWrite())

osu.Game/Overlays/Settings/Sections/SkinSection.cs

@@ -7,6 +7,7 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Logging;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Skinning;
@@ -34,13 +35,33 @@ namespace osu.Game.Overlays.Settings.Sections
         private IBindable<WeakReference<SkinInfo>> managerAdded;
         private IBindable<WeakReference<SkinInfo>> managerRemoved;
 
+        private SettingsButton exportButton;
+
+        private Bindable<Skin> currentSkin;
+
         [BackgroundDependencyLoader]
         private void load(OsuConfigManager config)
         {
             FlowContent.Spacing = new Vector2(0, 5);
+
             Children = new Drawable[]
             {
                 skinDropdown = new SkinSettingsDropdown(),
+                exportButton = new SettingsButton
+                {
+                    Text = "Export selected skin",
+                    Action = () =>
+                    {
+                        try
+                        {
+                            skins.Export(skins.CurrentSkin.Value.SkinInfo);
+                        }
+                        catch (Exception)
+                        {
+                            Logger.Log("Could not export current skin", level: LogLevel.Error);
+                        }
+                    }
+                },
                 new SettingsSlider<float, SizeSlider>
                 {
                     LabelText = "Menu cursor size",
@@ -81,6 +102,9 @@ namespace osu.Game.Overlays.Settings.Sections
             skinDropdown.Bindable = dropdownBindable;
             skinDropdown.Items = skins.GetAllUsableSkins().ToArray();
 
+            currentSkin = skins.CurrentSkin.GetBoundCopy();
+            currentSkin.BindValueChanged(skin => exportButton.Enabled.Value = skin.NewValue.SkinInfo.ID > 0);
+
             // Todo: This should not be necessary when OsuConfigManager is databased
             if (skinDropdown.Items.All(s => s.ID != configBindable.Value))
                 configBindable.Value = 0;