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57 lines
2.3 KiB
C#
57 lines
2.3 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using osu.Framework.Platform;
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using Newtonsoft.Json.Linq;
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namespace osu.Desktop.LegacyIpc
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{
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/// <summary>
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/// An <see cref="IpcMessage"/> that can be used to communicate to and from legacy clients.
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/// <para>
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/// In order to deserialise types at either end, types must be serialised as their <see cref="System.Type.AssemblyQualifiedName"/>,
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/// however this cannot be done since osu!stable and osu!lazer live in two different assemblies.
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/// <br />
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/// To get around this, this class exists which serialises a payload (<see cref="LegacyIpcMessage.Data"/>) as an <see cref="System.Object"/> type,
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/// which can be deserialised at either end because it is part of the core library (mscorlib / System.Private.CorLib).
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/// The payload contains the data to be sent over the IPC channel.
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/// <br />
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/// At either end, Json.NET deserialises the payload into a <see cref="JObject"/> which is manually converted back into the expected <see cref="LegacyIpcMessage.Data"/> type,
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/// which then further contains another <see cref="JObject"/> representing the data sent over the IPC channel whose type can likewise be lazily matched through
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/// <see cref="LegacyIpcMessage.Data.MessageType"/>.
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/// </para>
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/// </summary>
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/// <remarks>
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/// Synchronise any changes with osu-stable.
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/// </remarks>
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public class LegacyIpcMessage : IpcMessage
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{
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public LegacyIpcMessage()
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{
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// Types/assemblies are not inter-compatible, so always serialise/deserialise into objects.
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base.Type = typeof(object).FullName;
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}
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public new string Type => base.Type; // Hide setter.
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public new object Value
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{
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get => base.Value;
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set => base.Value = new Data(value.GetType().Name, value);
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}
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public class Data
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{
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public string MessageType { get; }
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public object MessageData { get; }
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public Data(string messageType, object messageData)
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{
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MessageType = messageType;
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MessageData = messageData;
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}
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}
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}
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}
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