mirror of https://github.com/ppy/osu
107 lines
3.3 KiB
C#
107 lines
3.3 KiB
C#
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System;
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using System.IO;
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using System.Linq;
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using osu.Framework.Extensions;
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using osu.Framework.IO.Stores;
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using osu.Framework.Logging;
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using osu.Framework.Platform;
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using osu.Game.Database;
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namespace osu.Game.IO
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{
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/// <summary>
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/// Handles the Store and retrieval of Files/FileSets to the database backing
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/// </summary>
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public class FileStore : DatabaseBackedStore
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{
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public readonly IResourceStore<byte[]> Store;
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public new Storage Storage => base.Storage;
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public FileStore(Func<OsuDbContext> createContext, Storage storage) : base(createContext, storage.GetStorageForDirectory(@"files"))
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{
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Store = new StorageBackedResourceStore(Storage);
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}
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public FileInfo Add(Stream data, bool reference = true)
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{
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var context = GetContext();
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string hash = data.ComputeSHA2Hash();
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var existing = context.FileInfo.FirstOrDefault(f => f.Hash == hash);
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var info = existing ?? new FileInfo { Hash = hash };
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string path = info.StoragePath;
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// we may be re-adding a file to fix missing store entries.
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if (!Storage.Exists(path))
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{
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data.Seek(0, SeekOrigin.Begin);
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using (var output = Storage.GetStream(path, FileAccess.Write))
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data.CopyTo(output);
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data.Seek(0, SeekOrigin.Begin);
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}
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if (reference || existing == null)
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Reference(info);
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return info;
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}
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public void Reference(params FileInfo[] files) => reference(GetContext(), files);
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private void reference(OsuDbContext context, FileInfo[] files)
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{
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foreach (var f in files.GroupBy(f => f.ID))
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{
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var refetch = context.Find<FileInfo>(f.First().ID) ?? f.First();
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refetch.ReferenceCount += f.Count();
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context.FileInfo.Update(refetch);
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}
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context.SaveChanges();
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}
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public void Dereference(params FileInfo[] files) => dereference(GetContext(), files);
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private void dereference(OsuDbContext context, FileInfo[] files)
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{
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foreach (var f in files.GroupBy(f => f.ID))
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{
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var refetch = context.FileInfo.Find(f.Key);
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refetch.ReferenceCount -= f.Count();
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context.FileInfo.Update(refetch);
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}
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context.SaveChanges();
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}
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public override void Cleanup()
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{
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var context = GetContext();
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foreach (var f in context.FileInfo.Where(f => f.ReferenceCount < 1))
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{
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try
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{
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Storage.Delete(f.StoragePath);
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context.FileInfo.Remove(f);
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}
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catch (Exception e)
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{
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Logger.Error(e, $@"Could not delete beatmap {f}");
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}
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}
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context.SaveChanges();
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}
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}
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}
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