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osu-lazer/osu.Game/Database/ArchiveModelManager.cs
2018-04-13 18:26:38 +09:00

349 lines
13 KiB
C#

// 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.Collections.Generic;
using System.IO;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using osu.Framework.Logging;
using osu.Framework.Platform;
using osu.Game.IO;
using osu.Game.IO.Archives;
using osu.Game.IPC;
using osu.Game.Overlays.Notifications;
using osu.Game.Utils;
using SharpCompress.Common;
using FileInfo = osu.Game.IO.FileInfo;
namespace osu.Game.Database
{
/// <summary>
/// Encapsulates a model store class to give it import functionality.
/// Adds cross-functionality with <see cref="FileStore"/> to give access to the central file store for the provided model.
/// </summary>
/// <typeparam name="TModel">The model type.</typeparam>
/// <typeparam name="TFileModel">The associated file join type.</typeparam>
public abstract class ArchiveModelManager<TModel, TFileModel> : ICanAcceptFiles
where TModel : class, IHasFiles<TFileModel>, IHasPrimaryKey, ISoftDelete
where TFileModel : INamedFileInfo, new()
{
/// <summary>
/// Set an endpoint for notifications to be posted to.
/// </summary>
public Action<Notification> PostNotification { protected get; set; }
/// <summary>
/// Fired when a new <see cref="TModel"/> becomes available in the database.
/// This is not guaranteed to run on the update thread.
/// </summary>
public event Action<TModel> ItemAdded;
/// <summary>
/// Fired when a <see cref="TModel"/> is removed from the database.
/// This is not guaranteed to run on the update thread.
/// </summary>
public event Action<TModel> ItemRemoved;
public virtual string[] HandledExtensions => new[] { ".zip" };
protected readonly FileStore Files;
protected readonly IDatabaseContextFactory ContextFactory;
protected readonly MutableDatabaseBackedStore<TModel> ModelStore;
// ReSharper disable once NotAccessedField.Local (we should keep a reference to this so it is not finalised)
private ArchiveImportIPCChannel ipc;
protected ArchiveModelManager(Storage storage, IDatabaseContextFactory contextFactory, MutableDatabaseBackedStore<TModel> modelStore, IIpcHost importHost = null)
{
ContextFactory = contextFactory;
ModelStore = modelStore;
ModelStore.ItemAdded += s => ItemAdded?.Invoke(s);
ModelStore.ItemRemoved += s => ItemRemoved?.Invoke(s);
Files = new FileStore(contextFactory, storage);
if (importHost != null)
ipc = new ArchiveImportIPCChannel(importHost, this);
ModelStore.Cleanup();
}
/// <summary>
/// Import one or more <see cref="TModel"/> items from filesystem <paramref name="paths"/>.
/// This will post notifications tracking progress.
/// </summary>
/// <param name="paths">One or more archive locations on disk.</param>
public void Import(params string[] paths)
{
var notification = new ProgressNotification
{
Text = "Import is initialising...",
Progress = 0,
State = ProgressNotificationState.Active,
};
PostNotification?.Invoke(notification);
List<TModel> imported = new List<TModel>();
int current = 0;
int errors = 0;
foreach (string path in paths)
{
if (notification.State == ProgressNotificationState.Cancelled)
// user requested abort
return;
try
{
notification.Text = $"Importing ({++current} of {paths.Length})\n{Path.GetFileName(path)}";
using (ArchiveReader reader = getReaderFrom(path))
imported.Add(Import(reader));
notification.Progress = (float)current / paths.Length;
// We may or may not want to delete the file depending on where it is stored.
// e.g. reconstructing/repairing database with items from default storage.
// Also, not always a single file, i.e. for LegacyFilesystemReader
// TODO: Add a check to prevent files from storage to be deleted.
try
{
if (File.Exists(path))
File.Delete(path);
}
catch (Exception e)
{
Logger.Error(e, $@"Could not delete original file after import ({Path.GetFileName(path)})");
}
}
catch (Exception e)
{
e = e.InnerException ?? e;
Logger.Error(e, $@"Could not import ({Path.GetFileName(path)})");
errors++;
}
}
notification.Text = errors > 0 ? $"Import complete with {errors} errors" : "Import successful!";
notification.State = ProgressNotificationState.Completed;
}
/// <summary>
/// Import an item from an <see cref="ArchiveReader"/>.
/// </summary>
/// <param name="archive">The archive to be imported.</param>
public TModel Import(ArchiveReader archive)
{
using (ContextFactory.GetForWrite()) // used to share a context for full import. keep in mind this will block all writes.
{
// create a new model (don't yet add to database)
var item = CreateModel(archive);
var existing = CheckForExisting(item);
if (existing != null) return existing;
item.Files = createFileInfos(archive, Files);
Populate(item, archive);
// import to store
ModelStore.Add(item);
return item;
}
}
/// <summary>
/// Import an item from a <see cref="TModel"/>.
/// </summary>
/// <param name="item">The model to be imported.</param>
public void Import(TModel item) => ModelStore.Add(item);
/// <summary>
/// Perform an update of the specified item.
/// TODO: Support file changes.
/// </summary>
/// <param name="item">The item to update.</param>
public void Update(TModel item) => ModelStore.Update(item);
/// <summary>
/// Delete an item from the manager.
/// Is a no-op for already deleted items.
/// </summary>
/// <param name="item">The item to delete.</param>
public void Delete(TModel item)
{
using (var usage = ContextFactory.GetForWrite())
{
var context = usage.Context;
context.ChangeTracker.AutoDetectChangesEnabled = false;
// re-fetch the model on the import context.
var foundModel = queryModel().Include(s => s.Files).ThenInclude(f => f.FileInfo).First(s => s.ID == item.ID);
if (foundModel.DeletePending) return;
if (ModelStore.Delete(foundModel))
Files.Dereference(foundModel.Files.Select(f => f.FileInfo).ToArray());
context.ChangeTracker.AutoDetectChangesEnabled = true;
}
}
/// <summary>
/// Delete multiple items.
/// This will post notifications tracking progress.
/// </summary>
public void Delete(List<TModel> items)
{
if (items.Count == 0) return;
var notification = new ProgressNotification
{
Progress = 0,
CompletionText = "Deleted all beatmaps!",
State = ProgressNotificationState.Active,
};
PostNotification?.Invoke(notification);
int i = 0;
using (ContextFactory.GetForWrite())
{
foreach (var b in items)
{
if (notification.State == ProgressNotificationState.Cancelled)
// user requested abort
return;
notification.Text = $"Deleting ({++i} of {items.Count})";
Delete(b);
notification.Progress = (float)i / items.Count;
}
}
notification.State = ProgressNotificationState.Completed;
}
/// <summary>
/// Restore multiple items that were previously deleted.
/// This will post notifications tracking progress.
/// </summary>
public void Undelete(List<TModel> items)
{
if (!items.Any()) return;
var notification = new ProgressNotification
{
CompletionText = "Restored all deleted items!",
Progress = 0,
State = ProgressNotificationState.Active,
};
PostNotification?.Invoke(notification);
int i = 0;
using (ContextFactory.GetForWrite())
{
foreach (var item in items)
{
if (notification.State == ProgressNotificationState.Cancelled)
// user requested abort
return;
notification.Text = $"Restoring ({++i} of {items.Count})";
Undelete(item);
notification.Progress = (float)i / items.Count;
}
}
notification.State = ProgressNotificationState.Completed;
}
/// <summary>
/// Restore an item that was previously deleted. Is a no-op if the item is not in a deleted state, or has its protected flag set.
/// </summary>
/// <param name="item">The item to restore</param>
public void Undelete(TModel item)
{
using (var usage = ContextFactory.GetForWrite())
{
usage.Context.ChangeTracker.AutoDetectChangesEnabled = false;
if (!ModelStore.Undelete(item)) return;
Files.Reference(item.Files.Select(f => f.FileInfo).ToArray());
usage.Context.ChangeTracker.AutoDetectChangesEnabled = true;
}
}
/// <summary>
/// Create all required <see cref="FileInfo"/>s for the provided archive, adding them to the global file store.
/// </summary>
private List<TFileModel> createFileInfos(ArchiveReader reader, FileStore files)
{
var fileInfos = new List<TFileModel>();
// import files to manager
foreach (string file in reader.Filenames)
using (Stream s = reader.GetStream(file))
fileInfos.Add(new TFileModel
{
Filename = file,
FileInfo = files.Add(s)
});
return fileInfos;
}
/// <summary>
/// Create a barebones model from the provided archive.
/// Actual expensive population should be done in <see cref="Populate"/>; this should just prepare for duplicate checking.
/// </summary>
/// <param name="archive">The archive to create the model for.</param>
/// <returns>A model populated with minimal information.</returns>
protected abstract TModel CreateModel(ArchiveReader archive);
/// <summary>
/// Populate the provided model completely from the given archive.
/// After this method, the model should be in a state ready to commit to a store.
/// </summary>
/// <param name="model">The model to populate.</param>
/// <param name="archive">The archive to use as a reference for population.</param>
protected virtual void Populate(TModel model, ArchiveReader archive)
{
}
protected virtual TModel CheckForExisting(TModel model) => null;
private DbSet<TModel> queryModel() => ContextFactory.Get().Set<TModel>();
/// <summary>
/// Creates an <see cref="ArchiveReader"/> from a valid storage path.
/// </summary>
/// <param name="path">A file or folder path resolving the archive content.</param>
/// <returns>A reader giving access to the archive's content.</returns>
private ArchiveReader getReaderFrom(string path)
{
if (ZipUtils.IsZipArchive(path))
return new ZipArchiveReader(Files.Storage.GetStream(path), Path.GetFileName(path));
if (Directory.Exists(path))
return new LegacyFilesystemReader(path);
throw new InvalidFormatException($"{path} is not a valid archive");
}
}
}