Implement NFC::GetTagState

include/services/nfc.hpp

@@ -14,22 +14,34 @@ class NFCService {
 	Kernel& kernel;
 	MAKE_LOG_FUNCTION(log, nfcLogger)
 
-	enum class Old3DSAdapterStatus : s32 {
+	enum class Old3DSAdapterStatus : u32 {
+		Idle = 0,
 		AttemptingToInitialize = 1,
 		InitializationComplete = 2,
-		// Other values are errors according to 3DBrew, set the not initialized error to -1 until we find out what it should be
-		NotInitialized = -1,
+		Active = 3,
+	};
+
+	enum class TagStatus : u8 {
+		NotInitialized = 0,
+		Initialized = 1,
+		Scanning = 2,
+		InRange = 3,
+		OutOfRange = 4,
+		Loaded = 5,
 	};
 
 	// Kernel events signaled when an NFC tag goes in and out of range respectively
 	std::optional<Handle> tagInRangeEvent, tagOutOfRangeEvent;
+
 	Old3DSAdapterStatus adapterStatus;
+	TagStatus tagStatus;
 
 	// Service commands
 	void communicationGetStatus(u32 messagePointer);
 	void initialize(u32 messagePointer);
 	void getTagInRangeEvent(u32 messagePointer);
 	void getTagOutOfRangeEvent(u32 messagePointer);
+	void getTagState(u32 messagePointer);
 	void stopCommunication(u32 messagePointer);
 
 public: