From 35e561276648ecfd828cfa4883d95f26959100c6 Mon Sep 17 00:00:00 2001
From: jduncanator <1518948+jduncanator@users.noreply.github.com>
Date: Thu, 14 Nov 2019 16:18:44 +1100
Subject: Implement a rudimentary applets system (#804)

* Implement Player Select applet

* Initialize the Horizon system reference

* Tidy up namespaces

* Resolve nits

* Resolve nits

* Rename stack to queue

* Implement an applet FIFO

* Remove debugging log

* Log applet creation events

* Reorganise AppletFifo

* More reorganisation

* Final changes
---
 Ryujinx.HLE/HOS/Applets/AppletManager.cs           | 29 ++++++++++++
 Ryujinx.HLE/HOS/Applets/IApplet.cs                 | 13 +++++
 .../HOS/Applets/PlayerSelect/PlayerSelectApplet.cs | 55 ++++++++++++++++++++++
 .../HOS/Applets/PlayerSelect/PlayerSelectResult.cs |  8 ++++
 4 files changed, 105 insertions(+)
 create mode 100644 Ryujinx.HLE/HOS/Applets/AppletManager.cs
 create mode 100644 Ryujinx.HLE/HOS/Applets/IApplet.cs
 create mode 100644 Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectApplet.cs
 create mode 100644 Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectResult.cs

(limited to 'Ryujinx.HLE/HOS/Applets')

diff --git a/Ryujinx.HLE/HOS/Applets/AppletManager.cs b/Ryujinx.HLE/HOS/Applets/AppletManager.cs
new file mode 100644
index 00000000..e5426cd7
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Applets/AppletManager.cs
@@ -0,0 +1,29 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE;
+using System;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    static class AppletManager
+    {
+        private static Dictionary<AppletId, Type> _appletMapping;
+
+        static AppletManager()
+        {
+            _appletMapping = new Dictionary<AppletId, Type>
+            {
+                { AppletId.PlayerSelect, typeof(PlayerSelectApplet) }
+            };
+        }
+
+        public static IApplet Create(AppletId applet, Horizon system)
+        {
+            if (_appletMapping.TryGetValue(applet, out Type appletClass))
+            {
+                return (IApplet)Activator.CreateInstance(appletClass, system);
+            }
+
+            throw new NotImplementedException($"{applet} applet is not implemented.");
+        }
+    }
+}
diff --git a/Ryujinx.HLE/HOS/Applets/IApplet.cs b/Ryujinx.HLE/HOS/Applets/IApplet.cs
new file mode 100644
index 00000000..aa248bf5
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Applets/IApplet.cs
@@ -0,0 +1,13 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE;
+using System;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    interface IApplet
+    {
+        event EventHandler AppletStateChanged;
+
+        ResultCode Start(AppletFifo<byte[]> inData, AppletFifo<byte[]> outData);
+        ResultCode GetResult();
+    }
+}
diff --git a/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectApplet.cs b/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectApplet.cs
new file mode 100644
index 00000000..7658c6db
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectApplet.cs
@@ -0,0 +1,55 @@
+using Ryujinx.HLE.HOS.Services.Account.Acc;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE;
+using System;
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    internal class PlayerSelectApplet : IApplet
+    {
+        private Horizon _system;
+
+        private AppletFifo<byte[]> _inputData;
+        private AppletFifo<byte[]> _outputData;
+
+        public event EventHandler AppletStateChanged;
+
+        public PlayerSelectApplet(Horizon system)
+        {
+            _system = system;
+        }
+
+        public ResultCode Start(AppletFifo<byte[]> inData, AppletFifo<byte[]> outData)
+        {
+            _inputData  = inData;
+            _outputData = outData;
+
+            // TODO(jduncanator): Parse PlayerSelectConfig from input data
+            _outputData.Push(BuildResponse());
+
+            AppletStateChanged?.Invoke(this, null);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetResult()
+        {
+            return ResultCode.Success;
+        }
+
+        private byte[] BuildResponse()
+        {
+            UserProfile currentUser = _system.State.Account.LastOpenedUser;
+
+            using (MemoryStream stream = new MemoryStream())
+            using (BinaryWriter writer = new BinaryWriter(stream))
+            {
+                writer.Write((ulong)PlayerSelectResult.Success);
+
+                currentUser.UserId.Write(writer);
+
+                return stream.ToArray();
+            }
+        }
+    }
+}
diff --git a/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectResult.cs b/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectResult.cs
new file mode 100644
index 00000000..682e094e
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectResult.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Applets
+{
+    enum PlayerSelectResult : ulong
+    {
+        Success = 0,
+        Failure = 2
+    }
+}
-- 
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