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osu-lazer/osu.Game/Stores/RealmArchiveModelManager.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using osu.Framework.Platform;
using osu.Game.Database;
using osu.Game.Extensions;
using osu.Game.Models;
using osu.Game.Overlays.Notifications;
using Realms;
#nullable enable
namespace osu.Game.Stores
{
/// <summary>
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/// Class which adds all the missing pieces bridging the gap between <see cref="RealmArchiveModelImporter{TModel}"/> and (legacy) ArchiveModelManager.
/// </summary>
public abstract class RealmArchiveModelManager<TModel> : RealmArchiveModelImporter<TModel>, IModelManager<TModel>, IModelFileManager<TModel, RealmNamedFileUsage>
where TModel : RealmObject, IHasRealmFiles, IHasGuidPrimaryKey, ISoftDelete
{
private readonly RealmFileStore realmFileStore;
protected RealmArchiveModelManager(Storage storage, RealmAccess realm)
: base(storage, realm)
{
realmFileStore = new RealmFileStore(realm, storage);
}
public void DeleteFile(TModel item, RealmNamedFileUsage file) =>
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performFileOperation(item, managed => DeleteFile(managed, managed.Files.First(f => f.Filename == file.Filename), managed.Realm));
public void ReplaceFile(TModel item, RealmNamedFileUsage file, Stream contents) =>
performFileOperation(item, managed => ReplaceFile(file, contents, managed.Realm));
public void AddFile(TModel item, Stream contents, string filename) =>
performFileOperation(item, managed => AddFile(managed, contents, filename, managed.Realm));
private void performFileOperation(TModel item, Action<TModel> operation)
{
// While we are detaching so often, this seems like the easiest way to keep things in sync.
// This method should be removed as soon as all the surrounding pieces support non-detached operations.
if (!item.IsManaged)
{
var managed = Realm.Realm.Find<TModel>(item.ID);
managed.Realm.Write(() => operation(managed));
item.Files.Clear();
item.Files.AddRange(managed.Files.Detach());
}
else
operation(item);
}
/// <summary>
/// Delete a file from within an ongoing realm transaction.
/// </summary>
protected void DeleteFile(TModel item, RealmNamedFileUsage file, Realm realm)
{
item.Files.Remove(file);
}
/// <summary>
/// Replace a file from within an ongoing realm transaction.
/// </summary>
protected void ReplaceFile(RealmNamedFileUsage file, Stream contents, Realm realm)
{
file.File = realmFileStore.Add(contents, realm);
}
/// <summary>
/// Add a file from within an ongoing realm transaction. If the file already exists, it is overwritten.
/// </summary>
protected void AddFile(TModel item, Stream contents, string filename, Realm realm)
{
var existing = item.Files.FirstOrDefault(f => string.Equals(f.Filename, filename, StringComparison.OrdinalIgnoreCase));
if (existing != null)
{
ReplaceFile(existing, contents, realm);
return;
}
var file = realmFileStore.Add(contents, realm);
var namedUsage = new RealmNamedFileUsage(file, filename);
item.Files.Add(namedUsage);
}
/// <summary>
/// Delete multiple items.
/// This will post notifications tracking progress.
/// </summary>
public void Delete(List<TModel> items, bool silent = false)
{
if (items.Count == 0) return;
var notification = new ProgressNotification
{
Progress = 0,
Text = $"Preparing to delete all {HumanisedModelName}s...",
CompletionText = $"Deleted all {HumanisedModelName}s!",
State = ProgressNotificationState.Active,
};
if (!silent)
PostNotification?.Invoke(notification);
int i = 0;
foreach (var b in items)
{
if (notification.State == ProgressNotificationState.Cancelled)
// user requested abort
return;
notification.Text = $"Deleting {HumanisedModelName}s ({++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, bool silent = false)
{
if (!items.Any()) return;
var notification = new ProgressNotification
{
CompletionText = "Restored all deleted items!",
Progress = 0,
State = ProgressNotificationState.Active,
};
if (!silent)
PostNotification?.Invoke(notification);
int i = 0;
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;
}
public bool Delete(TModel item)
{
return Realm.Run(realm =>
{
if (!item.IsManaged)
item = realm.Find<TModel>(item.ID);
if (item?.DeletePending != false)
return false;
realm.Write(r => item.DeletePending = true);
return true;
});
}
public void Undelete(TModel item)
{
Realm.Run(realm =>
{
if (!item.IsManaged)
item = realm.Find<TModel>(item.ID);
if (item?.DeletePending != true)
return;
realm.Write(r => item.DeletePending = false);
});
}
public abstract bool IsAvailableLocally(TModel model);
}
}