Implement Cabinet applet

This implements Nickname support for Amiibos, as well as means of editing the name of an amiibo in games.

src/Ryujinx.HLE/HOS/Applets/AppletManager.cs

@@ -18,6 +18,7 @@ namespace Ryujinx.HLE.HOS.Applets
                 { AppletId.PlayerSelect,     typeof(PlayerSelectApplet)     },
                 { AppletId.Controller,       typeof(ControllerApplet)       },
                 { AppletId.SoftwareKeyboard, typeof(SoftwareKeyboardApplet) },
+                { AppletId.Cabinet,          typeof(CabinetApplet)          },
                 { AppletId.LibAppletWeb,     typeof(BrowserApplet)          },
                 { AppletId.LibAppletShop,    typeof(BrowserApplet)          },
                 { AppletId.LibAppletOff,     typeof(BrowserApplet)          },

src/Ryujinx.HLE/HOS/Applets/Cabinet/AmiiboSettingsReturnFlag.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    [Flags]
+    enum AmiiboSettingsReturnFlag : byte
+    {
+        Cancel = 0,
+
+        HasTagInfo = 1 << 1,
+        HasRegisterInfo = 1 << 2,
+
+        HasCompleteInfo = HasTagInfo | HasRegisterInfo,
+    }
+}

src/Ryujinx.HLE/HOS/Applets/Cabinet/CabinetApplet.cs

@@ -0,0 +1,123 @@
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Common.Memory;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE;
+using Ryujinx.HLE.HOS.Services.Nfc.Nfp;
+using System;
+using System.IO;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    internal class CabinetApplet : IApplet
+    {
+        private readonly Horizon _system;
+
+        private AppletSession _normalSession;
+        private StartParamForAmiiboSettings _startArguments;
+
+        public event EventHandler AppletStateChanged;
+
+        public CabinetApplet(Horizon system)
+        {
+            _system = system;
+        }
+
+        public ResultCode Start(AppletSession normalSession, AppletSession interactiveSession)
+        {
+            _normalSession = normalSession;
+
+            CommonArguments commonArguments = IApplet.ReadStruct<CommonArguments>(normalSession.Pop());
+
+            Logger.Info?.PrintMsg(LogClass.ServiceAm, $"CabinetApplet version: 0x{commonArguments.AppletVersion:x8}");
+
+            _startArguments = IApplet.ReadStruct<StartParamForAmiiboSettings>(normalSession.Pop());
+            switch (_startArguments.Type)
+            {
+                case StartParamForAmiiboSettingsType.NicknameAndOwnerSettings:
+                    {
+                        // TODO: allow changing the owning Mii
+                        ChangeNickname();
+
+                        break;
+                    }
+
+                default:
+                    throw new NotImplementedException($"CabinetStartType {_startArguments.Type} is not implemented.");
+            }
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetResult()
+        {
+            return ResultCode.Success;
+        }
+
+        private void ChangeNickname()
+        {
+            string nickname = null;
+            if (_startArguments.Flags.HasFlag(AmiiboSettingsReturnFlag.HasRegisterInfo))
+            {
+                nickname = Encoding.UTF8.GetString(_startArguments.RegisterInfo.Nickname.AsSpan()).TrimEnd('\0');
+            }
+
+            SoftwareKeyboardUIArgs inputParameters = new()
+            {
+                HeaderText = "Enter a new nickname for this amiibo.",
+                GuideText = nickname,
+                StringLengthMin = 1,
+                StringLengthMax = 10,
+            };
+
+            bool inputResult = _system.Device.UIHandler.DisplayInputDialog(inputParameters, out string newNickname);
+            if (!inputResult)
+            {
+                ReturnCancel();
+
+                return;
+            }
+
+            VirtualAmiibo.SetNickname(_startArguments.TagInfo.Uuid.AsSpan()[..9].ToArray(), newNickname);
+
+            ReturnValueForAmiiboSettings returnValue = new()
+            {
+                Flags = AmiiboSettingsReturnFlag.HasCompleteInfo,
+                DeviceHandle = (ulong)_system.NfpDevices[0].Handle,
+                TagInfo = _startArguments.TagInfo,
+                RegisterInfo = _startArguments.RegisterInfo,
+            };
+
+            Span<byte> nicknameData = returnValue.RegisterInfo.Nickname.AsSpan();
+            nicknameData.Clear();
+
+            Encoding.UTF8.GetBytes(newNickname).CopyTo(nicknameData);
+
+            _normalSession.Push(BuildResponse(returnValue));
+            AppletStateChanged?.Invoke(this, null);
+            _system.ReturnFocus();
+        }
+
+        private void ReturnCancel()
+        {
+            _normalSession.Push(BuildResponse());
+            AppletStateChanged?.Invoke(this, null);
+            _system.ReturnFocus();
+        }
+
+        private static byte[] BuildResponse(ReturnValueForAmiiboSettings result)
+        {
+            using MemoryStream stream = MemoryStreamManager.Shared.GetStream();
+            using BinaryWriter writer = new(stream);
+
+            writer.WriteStruct(result);
+
+            return stream.ToArray();
+        }
+
+        private static byte[] BuildResponse()
+        {
+            return BuildResponse(new ReturnValueForAmiiboSettings { Flags = AmiiboSettingsReturnFlag.Cancel });
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Applets/Cabinet/ReturnValueForAmiiboSettings.cs

@@ -0,0 +1,17 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.HLE.HOS.Services.Nfc.Nfp.NfpManager;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x188, Pack = 1)]
+    struct ReturnValueForAmiiboSettings
+    {
+        public AmiiboSettingsReturnFlag Flags;
+        public Array3<byte> Padding;
+        public ulong DeviceHandle;
+        public TagInfo TagInfo;
+        public RegisterInfo RegisterInfo;
+        public Array36<byte> Ignored;
+    }
+}

src/Ryujinx.HLE/HOS/Applets/Cabinet/StartParamForAmiiboSettings.cs

@@ -0,0 +1,19 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.HLE.HOS.Services.Nfc.Nfp.NfpManager;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x1a8)]
+    struct StartParamForAmiiboSettings
+    {
+        public byte Unused1;
+        public StartParamForAmiiboSettingsType Type;
+        public AmiiboSettingsReturnFlag Flags;
+        public Array9<byte> StartParamData1;
+        public TagInfo TagInfo;
+        public RegisterInfo RegisterInfo;
+        public Array32<byte> StartParamData2;
+        public Array36<byte> Unused2;
+    }
+}

src/Ryujinx.HLE/HOS/Applets/Cabinet/StartParamForAmiiboSettingsType.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.HLE.HOS.Applets
+{
+    enum StartParamForAmiiboSettingsType : byte
+    {
+        NicknameAndOwnerSettings = 0,
+        GameDataEraser = 1,
+        Restorer = 2,
+        Formatter = 3,
+    }
+}

src/Ryujinx.HLE/HOS/Services/Nfc/Nfp/NfpManager/Types/VirtualAmiiboFile.cs

@@ -6,6 +6,7 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp.NfpManager
     struct VirtualAmiiboFile
     {
         public uint FileVersion { get; set; }
+        public string Nickname { get; set; }
         public byte[] TagUuid { get; set; }
         public string AmiiboId { get; set; }
         public DateTime FirstWriteDate { get; set; }

src/Ryujinx.HLE/HOS/Services/Nfc/Nfp/VirtualAmiibo.cs

@@ -8,6 +8,8 @@ using Ryujinx.HLE.HOS.Services.Nfc.Nfp.NfpManager;
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
+using System.Text;
 
 namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
 {
@@ -85,7 +87,8 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
                 Reserved1 = new Array64<byte>(),
                 Reserved2 = new Array58<byte>(),
             };
-            "Ryujinx"u8.CopyTo(registerInfo.Nickname.AsSpan());
+
+            Encoding.UTF8.GetBytes(amiiboFile.Nickname).CopyTo(registerInfo.Nickname.AsSpan());
 
             return registerInfo;
         }
@@ -163,6 +166,15 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
             }
         }
 
+        public static void SetNickname(byte[] tagUuid, string nickname)
+        {
+            VirtualAmiiboFile virtualAmiiboFile = LoadAmiiboFile(tagUuid);
+
+            virtualAmiiboFile.Nickname = nickname;
+
+            SaveAmiiboFile(virtualAmiiboFile);
+        }
+
         private static VirtualAmiiboFile LoadAmiiboFile(string amiiboId)
         {
             Directory.CreateDirectory(Path.Join(AppDataManager.BaseDirPath, "system", "amiibo"));
@@ -174,12 +186,20 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
             if (File.Exists(filePath))
             {
                 virtualAmiiboFile = JsonHelper.DeserializeFromFile(filePath, _serializerContext.VirtualAmiiboFile);
+
+                if (virtualAmiiboFile.Nickname == null)
+                {
+                    virtualAmiiboFile.Nickname = "Ryujinx";
+
+                    SaveAmiiboFile(virtualAmiiboFile);
+                }
             }
             else
             {
                 virtualAmiiboFile = new VirtualAmiiboFile()
                 {
                     FileVersion = 0,
+                    Nickname = "Ryujinx",
                     TagUuid = Array.Empty<byte>(),
                     AmiiboId = amiiboId,
                     FirstWriteDate = DateTime.Now,
@@ -194,6 +214,28 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
             return virtualAmiiboFile;
         }
 
+        private static VirtualAmiiboFile LoadAmiiboFile(byte[] tagUuid)
+        {
+            VirtualAmiiboFile virtualAmiiboFile;
+
+            string[] paths = Directory.GetFiles(Path.Join(AppDataManager.BaseDirPath, "system", "amiibo"), "*.json");
+            foreach (string path in paths)
+            {
+                if (path.EndsWith("Amiibo.json"))
+                {
+                    continue;
+                }
+
+                virtualAmiiboFile = JsonHelper.DeserializeFromFile(path, _serializerContext.VirtualAmiiboFile);
+                if (virtualAmiiboFile.TagUuid.SequenceEqual(tagUuid))
+                {
+                    return virtualAmiiboFile;
+                }
+            }
+
+            throw new FileNotFoundException();
+        }
+
         private static void SaveAmiiboFile(VirtualAmiiboFile virtualAmiiboFile)
         {
             string filePath = Path.Join(AppDataManager.BaseDirPath, "system", "amiibo", $"{virtualAmiiboFile.AmiiboId}.json");