Extend account services to support BAAS and some user operations

These are needed by Super Mario Odyssey and several other games.

app/CMakeLists.txt

@@ -114,6 +114,7 @@ add_library(skyline SHARED
         ${source_DIR}/skyline/services/lm/ILogService.cpp
         ${source_DIR}/skyline/services/lm/ILogger.cpp
         ${source_DIR}/skyline/services/account/IAccountServiceForApplication.cpp
+        ${source_DIR}/skyline/services/account/IManagerForApplication.cpp
         ${source_DIR}/skyline/vfs/partition_filesystem.cpp
         ${source_DIR}/skyline/vfs/rom_filesystem.cpp
         ${source_DIR}/skyline/vfs/os_backing.cpp

app/src/main/cpp/skyline/services/account/IAccountServiceForApplication.cpp

@@ -1,12 +1,30 @@
 // SPDX-License-Identifier: MPL-2.0
 // Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
 
+#include "IManagerForApplication.h"
 #include "IAccountServiceForApplication.h"
 
 namespace skyline::service::account {
     IAccountServiceForApplication::IAccountServiceForApplication(const DeviceState &state, ServiceManager &manager) : BaseService(state, manager, Service::account_IAccountServiceForApplication, "account:IAccountServiceForApplication", {
-        {0x64, SFUNC(IAccountServiceForApplication::InitializeApplicationInfoV0)}
+        {0x1, SFUNC(IAccountServiceForApplication::GetUserExistence)},
+        {0x4, SFUNC(IAccountServiceForApplication::GetLastOpenedUser)},
+        {0x64, SFUNC(IAccountServiceForApplication::InitializeApplicationInfoV0)},
+        {0x65, SFUNC(IAccountServiceForApplication::GetBaasAccountManagerForApplication)}
     }) {}
 
+    void IAccountServiceForApplication::GetUserExistence(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {
+        auto id = request.Pop<UserId>();
+
+        response.Push<u32>(id == constant::DefaultUserId);
+    }
+
+    void IAccountServiceForApplication::GetLastOpenedUser(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {
+        response.Push(constant::DefaultUserId);
+    }
+
     void IAccountServiceForApplication::InitializeApplicationInfoV0(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {}
+
+    void IAccountServiceForApplication::GetBaasAccountManagerForApplication(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {
+        manager.RegisterService(SRVREG(IManagerForApplication), session, response);
+    }
 }

app/src/main/cpp/skyline/services/account/IAccountServiceForApplication.h

@@ -14,6 +14,14 @@ namespace skyline {
         struct UserId {
             u64 upper; //!< The upper 64 bits of the user ID
             u64 lower; //!< The lower 64 bits of the user ID
+
+            /**
+             * @param userId The user ID to compare with
+             * @return Whether this user ID matches the one given as a parameter
+             */
+            inline constexpr bool operator==(const UserId& userId) {
+                return upper == userId.upper && lower == userId.lower;
+            }
         };
         /**
         * @brief IAccountServiceForApplication or acc:u0 provides functions for reading user information (https://switchbrew.org/wiki/Account_services#acc:u0)
@@ -22,10 +30,25 @@ namespace skyline {
           public:
             IAccountServiceForApplication(const DeviceState &state, ServiceManager &manager);
 
+            /**
+            * @brief This checks if the given user ID exists
+            */
+            void GetUserExistence(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
+
+            /**
+            * @brief This returns the user ID of the last active user on the console
+            */
+            void GetLastOpenedUser(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
+
             /**
             * @brief This provides information about the running application for account services to use (https://switchbrew.org/wiki/Account_services#InitializeApplicationInfoV0)
             */
             void InitializeApplicationInfoV0(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
+
+            /**
+            * @brief This returns a handle to an IManagerForApplication which can be used for reading Nintendo Online info
+            */
+            void GetBaasAccountManagerForApplication(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
         };
     }
 

app/src/main/cpp/skyline/services/account/IManagerForApplication.cpp

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: MPL-2.0
+// Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
+
+#include "IManagerForApplication.h"
+
+namespace skyline::service::account {
+    IManagerForApplication::IManagerForApplication(const DeviceState &state, ServiceManager &manager) : BaseService(state, manager, Service::account_IManagerForApplication, "account:IManagerForApplication", {
+    }) {}
+}

app/src/main/cpp/skyline/services/account/IManagerForApplication.h

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: MPL-2.0
+// Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
+
+#pragma once
+
+#include <services/base_service.h>
+#include <services/serviceman.h>
+
+namespace skyline::service::account {
+    /**
+    * @brief IManagerForApplication provides functions for reading Nintendo Online user information (https://switchbrew.org/wiki/Account_services#IManagerForApplication)
+    */
+    class IManagerForApplication : public BaseService {
+      public:
+        IManagerForApplication(const DeviceState &state, ServiceManager &manager);
+    };
+}

app/src/main/cpp/skyline/services/base_service.h

@@ -70,6 +70,7 @@ namespace skyline::service {
         lm_ILogService,
         lm_ILogger,
         account_IAccountServiceForApplication,
+        account_IManagerForApplication,
     };
 
     /**