From 72ae5d2bfa237c75adccae4119a9ac5dcd4a8e01 Mon Sep 17 00:00:00 2001
From: wheremyfoodat <44909372+wheremyfoodat@users.noreply.github.com>
Date: Fri, 8 Sep 2023 23:16:33 +0300
Subject: [PATCH] Add reading amiibo from .amiibo file

---
 CMakeLists.txt                      |  3 ++-
 include/services/amiibo_device.hpp  | 15 +++++++++++++++
 include/services/nfc.hpp            |  2 ++
 src/core/services/amiibo_device.cpp |  3 +++
 src/core/services/nfc.cpp           | 24 +++++++++++++++++++++++-
 5 files changed, 45 insertions(+), 2 deletions(-)
 create mode 100644 include/services/amiibo_device.hpp
 create mode 100644 src/core/services/amiibo_device.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d0ac2804..b4ca6745 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -137,7 +137,7 @@ set(SERVICE_SOURCE_FILES src/core/services/service_manager.cpp src/core/services
                          src/core/services/y2r.cpp src/core/services/cam.cpp src/core/services/ldr_ro.cpp
                          src/core/services/act.cpp src/core/services/nfc.cpp src/core/services/dlp_srvr.cpp
                          src/core/services/ir_user.cpp src/core/services/http.cpp src/core/services/soc.cpp
-                         src/core/services/ssl.cpp src/core/services/news_u.cpp
+                         src/core/services/ssl.cpp src/core/services/news_u.cpp src/core/services/amiibo_device.cpp
 )
 set(PICA_SOURCE_FILES src/core/PICA/gpu.cpp src/core/PICA/regs.cpp src/core/PICA/shader_unit.cpp
                       src/core/PICA/shader_interpreter.cpp src/core/PICA/dynapica/shader_rec.cpp
@@ -181,6 +181,7 @@ set(HEADER_FILES include/emulator.hpp include/helpers.hpp include/termcolor.hpp
                  include/fs/romfs.hpp include/fs/ivfc.hpp include/discord_rpc.hpp include/services/http.hpp include/result/result_cfg.hpp
                  include/applets/applet.hpp include/applets/mii_selector.hpp include/math_util.hpp include/services/soc.hpp 
                  include/services/news_u.hpp include/applets/software_keyboard.hpp include/applets/applet_manager.hpp include/fs/archive_user_save_data.hpp
+                 include/services/amiibo_device.hpp
 )
 
 cmrc_add_resource_library(
diff --git a/include/services/amiibo_device.hpp b/include/services/amiibo_device.hpp
new file mode 100644
index 00000000..0b9f21e1
--- /dev/null
+++ b/include/services/amiibo_device.hpp
@@ -0,0 +1,15 @@
+#pragma once
+#include <array>
+
+#include "helpers.hpp"
+#include "io_file.hpp"
+
+class AmiiboDevice {
+  public:
+	static constexpr size_t tagSize = 0x21C;
+
+	bool loaded = false;
+	std::array<u8, tagSize> raw;
+
+	void reset();
+};
\ No newline at end of file
diff --git a/include/services/nfc.hpp b/include/services/nfc.hpp
index 94667f21..151d8408 100644
--- a/include/services/nfc.hpp
+++ b/include/services/nfc.hpp
@@ -1,6 +1,7 @@
 #pragma once
 #include <filesystem>
 
+#include "amiibo_device.hpp"
 #include "helpers.hpp"
 #include "kernel_types.hpp"
 #include "logger.hpp"
@@ -35,6 +36,7 @@ class NFCService {
 	// Kernel events signaled when an NFC tag goes in and out of range respectively
 	std::optional<Handle> tagInRangeEvent, tagOutOfRangeEvent;
 
+	AmiiboDevice device;
 	Old3DSAdapterStatus adapterStatus;
 	TagStatus tagStatus;
 	bool initialized = false;
diff --git a/src/core/services/amiibo_device.cpp b/src/core/services/amiibo_device.cpp
new file mode 100644
index 00000000..58a0e2c6
--- /dev/null
+++ b/src/core/services/amiibo_device.cpp
@@ -0,0 +1,3 @@
+#include "services/amiibo_device.hpp"
+
+void AmiiboDevice::reset() { loaded = false; }
\ No newline at end of file
diff --git a/src/core/services/nfc.cpp b/src/core/services/nfc.cpp
index 0cb3e699..9d9a37d7 100644
--- a/src/core/services/nfc.cpp
+++ b/src/core/services/nfc.cpp
@@ -1,4 +1,5 @@
 #include "services/nfc.hpp"
+#include "io_file.hpp"
 #include "ipc.hpp"
 #include "kernel.hpp"
 
@@ -18,6 +19,7 @@ namespace NFCCommands {
 }
 
 void NFCService::reset() {
+	device.reset();
 	tagInRangeEvent = std::nullopt;
 	tagOutOfRangeEvent = std::nullopt;
 
@@ -43,7 +45,27 @@ void NFCService::handleSyncRequest(u32 messagePointer) {
 	}
 }
 
-bool NFCService::loadAmiibo(const std::filesystem::path& path) { return true; }
+bool NFCService::loadAmiibo(const std::filesystem::path& path) {
+	IOFile file(path, "rb");
+
+	if (!file.isOpen()) {
+		printf("Failed to open Amiibo file");
+		file.close();
+
+		return false;
+	}
+
+	auto [success, bytesRead] = file.readBytes(&device.raw, AmiiboDevice::tagSize);
+	if (!success || bytesRead != AmiiboDevice::tagSize) {
+		printf("Failed to read entire tag from Amiibo file: File might not be a proper amiibo file\n");
+		file.close();
+
+		return false;
+	}
+
+	file.close();
+	return true;
+}
 
 void NFCService::initialize(u32 messagePointer) {
 	const u8 type = mem.read8(messagePointer + 4);