osu/osu.Game/Rulesets/RealmRulesetStore.cs

148 lines
6.8 KiB
C#

// 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.Linq;
using osu.Framework.Extensions.ObjectExtensions;
using osu.Framework.Platform;
using osu.Game.Beatmaps;
using osu.Game.Database;
namespace osu.Game.Rulesets
{
public class RealmRulesetStore : RulesetStore
{
public override IEnumerable<RulesetInfo> AvailableRulesets => availableRulesets;
private readonly List<RulesetInfo> availableRulesets = new List<RulesetInfo>();
public RealmRulesetStore(RealmAccess realm, Storage? storage = null)
: base(storage)
{
prepareDetachedRulesets(realm);
}
private void prepareDetachedRulesets(RealmAccess realmAccess)
{
realmAccess.Write(realm =>
{
var rulesets = realm.All<RulesetInfo>();
List<Ruleset> instances = LoadedAssemblies.Values
.Select(r => Activator.CreateInstance(r) as Ruleset)
.Where(r => r != null)
.Select(r => r.AsNonNull())
.ToList();
// add all legacy rulesets first to ensure they have exclusive choice of primary key.
foreach (var r in instances.Where(r => r is ILegacyRuleset))
{
if (realm.All<RulesetInfo>().FirstOrDefault(rr => rr.OnlineID == r.RulesetInfo.OnlineID) == null)
realm.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
}
// add any other rulesets which have assemblies present but are not yet in the database.
foreach (var r in instances.Where(r => !(r is ILegacyRuleset)))
{
if (rulesets.FirstOrDefault(ri => ri.InstantiationInfo.Equals(r.RulesetInfo.InstantiationInfo, StringComparison.Ordinal)) == null)
{
var existingSameShortName = rulesets.FirstOrDefault(ri => ri.ShortName == r.RulesetInfo.ShortName);
if (existingSameShortName != null)
{
// even if a matching InstantiationInfo was not found, there may be an existing ruleset with the same ShortName.
// this generally means the user or ruleset provider has renamed their dll but the underlying ruleset is *likely* the same one.
// in such cases, update the instantiation info of the existing entry to point to the new one.
existingSameShortName.InstantiationInfo = r.RulesetInfo.InstantiationInfo;
}
else
realm.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
}
}
List<RulesetInfo> detachedRulesets = new List<RulesetInfo>();
// perform a consistency check and detach final rulesets from realm for cross-thread runtime usage.
foreach (var r in rulesets.OrderBy(r => r.OnlineID))
{
try
{
var resolvedType = Type.GetType(r.InstantiationInfo);
if (resolvedType == null)
{
// ruleset DLL was probably deleted.
r.Available = false;
continue;
}
var instance = (Activator.CreateInstance(resolvedType) as Ruleset);
var instanceInfo = instance?.RulesetInfo
?? throw new RulesetLoadException(@"Instantiation failure");
if (!checkRulesetUpToDate(instance))
{
throw new ArgumentOutOfRangeException(nameof(instance.RulesetAPIVersionSupported),
$"Ruleset API version is too old (was {instance.RulesetAPIVersionSupported}, expected {Ruleset.CURRENT_RULESET_API_VERSION})");
}
// If a ruleset isn't up-to-date with the API, it could cause a crash at an arbitrary point of execution.
// To eagerly handle cases of missing implementations, enumerate all types here and mark as non-available on throw.
resolvedType.Assembly.GetTypes();
r.Name = instanceInfo.Name;
r.ShortName = instanceInfo.ShortName;
r.InstantiationInfo = instanceInfo.InstantiationInfo;
r.Available = true;
testRulesetCompatibility(r);
detachedRulesets.Add(r.Clone());
}
catch (Exception ex)
{
r.Available = false;
LogFailedLoad(r.Name, ex);
}
}
availableRulesets.AddRange(detachedRulesets.OrderBy(r => r));
});
}
private bool checkRulesetUpToDate(Ruleset instance)
{
switch (instance.RulesetAPIVersionSupported)
{
// The default `virtual` implementation leaves the version string empty.
// Consider rulesets which haven't override the version as up-to-date for now.
// At some point (once ruleset devs add versioning), we'll probably want to disallow this for deployed builds.
case @"":
// Ruleset is up-to-date, all good.
case Ruleset.CURRENT_RULESET_API_VERSION:
return true;
default:
return false;
}
}
private void testRulesetCompatibility(RulesetInfo rulesetInfo)
{
// do various operations to ensure that we are in a good state.
// if we can avoid loading the ruleset at this point (rather than erroring later in runtime) then that is preferred.
var instance = rulesetInfo.CreateInstance();
instance.CreateAllMods();
instance.CreateIcon();
instance.CreateResourceStore();
var beatmap = new Beatmap();
var converter = instance.CreateBeatmapConverter(beatmap);
instance.CreateBeatmapProcessor(converter.Convert());
}
}
}