Move BeatmapSetDownloader to osu.Game.Beatmaps.Drawables

osu.Game/Beatmaps/Drawables/BeatmapSetDownloader.cs

@@ -0,0 +1,78 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Configuration;
+using osu.Framework.Graphics;
+
+namespace osu.Game.Beatmaps.Drawables
+{
+    public class BeatmapSetDownloader : Drawable
+    {
+        private readonly BeatmapSetInfo set;
+        private readonly bool noVideo;
+
+        private BeatmapManager beatmaps;
+
+        public readonly BindableBool Downloaded = new BindableBool();
+
+        public event Action OnAlreadyDownloading;
+
+        public BeatmapSetDownloader(BeatmapSetInfo set, bool noVideo = false)
+        {
+            this.set = set;
+            this.noVideo = noVideo;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(BeatmapManager beatmaps)
+        {
+            this.beatmaps = beatmaps;
+
+            beatmaps.ItemAdded += setAdded;
+            beatmaps.ItemRemoved += setRemoved;
+
+            // initial value
+            Downloaded.Value = beatmaps.QueryBeatmapSets(s => s.OnlineBeatmapSetID == set.OnlineBeatmapSetID && !s.DeletePending).Count() != 0;
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (beatmaps != null)
+            {
+                beatmaps.ItemAdded -= setAdded;
+                beatmaps.ItemRemoved -= setRemoved;
+            }
+        }
+
+        public void Download()
+        {
+            if (Downloaded.Value)
+                return;
+
+            if (beatmaps.GetExistingDownload(set) != null)
+            {
+                OnAlreadyDownloading?.Invoke();
+                return;
+            }
+
+            beatmaps.Download(set, noVideo);
+        }
+
+        private void setAdded(BeatmapSetInfo s)
+        {
+            if (s.OnlineBeatmapSetID == set.OnlineBeatmapSetID)
+                Downloaded.Value = true;
+        }
+
+        private void setRemoved(BeatmapSetInfo s)
+        {
+            if (s.OnlineBeatmapSetID == set.OnlineBeatmapSetID)
+                Downloaded.Value = false;
+        }
+    }
+}