osu/osu.Game/Rulesets/RulesetStore.cs

125 lines
4.1 KiB
C#

// Copyright (c) 2007-2017 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 System.Reflection;
using osu.Game.Database;
namespace osu.Game.Rulesets
{
/// <summary>
/// Todo: All of this needs to be moved to a RulesetStore.
/// </summary>
public class RulesetStore : DatabaseBackedStore
{
private static readonly Dictionary<Assembly, Type> loaded_assemblies = new Dictionary<Assembly, Type>();
static RulesetStore()
{
AppDomain.CurrentDomain.AssemblyResolve += currentDomain_AssemblyResolve;
foreach (string file in Directory.GetFiles(Environment.CurrentDirectory, $"{ruleset_library_prefix}.*.dll"))
loadRulesetFromFile(file);
}
public RulesetStore(Func<OsuDbContext> factory)
: base(factory)
{
AddMissingRulesets();
}
/// <summary>
/// Retrieve a ruleset using a known ID.
/// </summary>
/// <param name="id">The ruleset's internal ID.</param>
/// <returns>A ruleset, if available, else null.</returns>
public RulesetInfo GetRuleset(int id) => AvailableRulesets.FirstOrDefault(r => r.ID == id);
/// <summary>
/// All available rulesets.
/// </summary>
public IEnumerable<RulesetInfo> AvailableRulesets;
private static Assembly currentDomain_AssemblyResolve(object sender, ResolveEventArgs args) => loaded_assemblies.Keys.FirstOrDefault(a => a.FullName == args.Name);
private const string ruleset_library_prefix = "osu.Game.Rulesets";
protected void AddMissingRulesets()
{
var context = GetContext();
var instances = loaded_assemblies.Values.Select(r => (Ruleset)Activator.CreateInstance(r, new RulesetInfo())).ToList();
//add all legacy modes in correct order
foreach (var r in instances.Where(r => r.LegacyID >= 0).OrderBy(r => r.LegacyID))
{
var rulesetInfo = createRulesetInfo(r);
if (context.RulesetInfo.SingleOrDefault(rsi => rsi.ID == rulesetInfo.ID) == null)
{
context.RulesetInfo.Add(rulesetInfo);
}
}
context.SaveChanges();
//add any other modes
foreach (var r in instances.Where(r => r.LegacyID < 0))
{
var us = createRulesetInfo(r);
var existing = context.RulesetInfo.FirstOrDefault(ri => ri.InstantiationInfo == us.InstantiationInfo);
if (existing == null)
context.RulesetInfo.Add(us);
}
context.SaveChanges();
//perform a consistency check
foreach (var r in context.RulesetInfo)
{
try
{
r.CreateInstance();
r.Available = true;
}
catch
{
r.Available = false;
}
}
context.SaveChanges();
AvailableRulesets = context.RulesetInfo.Where(r => r.Available).ToList();
}
private static void loadRulesetFromFile(string file)
{
var filename = Path.GetFileNameWithoutExtension(file);
if (loaded_assemblies.Values.Any(t => t.Namespace == filename))
return;
try
{
var assembly = Assembly.LoadFrom(file);
loaded_assemblies[assembly] = assembly.GetTypes().First(t => t.IsSubclassOf(typeof(Ruleset)));
}
catch (Exception)
{
}
}
private RulesetInfo createRulesetInfo(Ruleset ruleset) => new RulesetInfo
{
Name = ruleset.Description,
InstantiationInfo = ruleset.GetType().AssemblyQualifiedName,
ID = ruleset.LegacyID
};
}
}