add error when no portal found

Source/SkyPortal/Private/SkyPortalSubsystem.cpp

@@ -1,9 +1,14 @@
+// A lot of this code is made because of the work of https://github.com/capull0/SkyDumper
+
 #include "SkyPortalSubsystem.h"
 #include "Engine/Engine.h"
-#include "hidapi.h"
+
+DEFINE_LOG_CATEGORY(LogHIDApi);
+
 
 void USkyPortalSubsystem::Initialize(FSubsystemCollectionBase& Collection)
 {
+
 	Super::Initialize(Collection);
 	// Custom initialization logic
 	UE_LOG(LogTemp, Warning, TEXT("SkyPortalSubsystem Initialized"));
@@ -12,19 +17,104 @@ void USkyPortalSubsystem::Initialize(FSubsystemCollectionBase& Collection)
 	int res = hid_init();
 	if (res == 0)
 	{
-		UE_LOG(LogTemp, Log, TEXT("HIDAPI initialized successfully."));
+		UE_LOG(LogHIDApi, Log, TEXT("HIDAPI initialized successfully."));
+
 	}
 	else
 	{
-		UE_LOG(LogTemp, Error, TEXT("Failed to initialize HIDAPI."));
+		UE_LOG(LogHIDApi, Error, TEXT("Failed to initialize HIDAPI."));
+		HidError = hid_error(NULL);
+		UE_LOG(LogHIDApi, Error, TEXT("%s"), *HidError);
 	}
 
 }
 
 void USkyPortalSubsystem::Deinitialize()
 {
-	// Custom cleanup logic
+	// Disconnect portal
+	if (PortalDevice) {
+		hid_close(PortalDevice);
+	}
+	hid_exit();
+
 
 	UE_LOG(LogTemp, Warning, TEXT("SkyPortalSubsystem Deinitialized"));
 	Super::Deinitialize();
-}
+}
+
+
+
+/*
+Number of endpoints : 2
+found an IN End Point 0 with attributes interrupt and address 0x1
+found an OUT End Point 1 with attributes interrupt and address 0x1
+*/
+bool USkyPortalSubsystem::ConnectPortal() {
+	/*
+		Declare two pointers to hold information about HID devices.
+		"list" will point to the head of the linked list of devices,
+		"attributes" will be used to iterate through the list.
+	*/
+	struct hid_device_info* list, * attributes;
+
+	list = hid_enumerate(0x0, 0x0);
+	// If `list` is NULL, that means no devices were found or there was an error.
+	// In this case, print an error message and terminate the program.
+	if (!list) {
+		UE_LOG(LogHIDApi, Error, TEXT("No devices found"));
+		// Get the error message from the HIDAPI
+		HidError = hid_error(NULL);
+		UE_LOG(LogHIDApi, Error, TEXT("%s"), *HidError);
+		return false;
+	}
+	attributes = list;
+
+
+
+
+	// Iterate through the linked list of devices
+	int vendorCount = sizeof(VendorIds) / sizeof(VendorIds[0]);
+	int productCount = sizeof(ProductIds) / sizeof(ProductIds[0]);
+
+	while (attributes) {
+		// Check if the devices match any of vendor_id and product_id 
+		for (int i = 0; i < vendorCount; i++) {
+			for (int j = 0; j < productCount; j++) {
+				if (attributes->vendor_id == VendorIds[i] && attributes->product_id == ProductIds[j]) {
+					UE_LOG(LogHIDApi, Display, TEXT("Portal found"));
+					UE_LOG(LogHIDApi, Log, TEXT("Vendor ID: 0x%x, Product ID: 0x%x"), attributes->vendor_id, attributes->product_id);
+
+					PortalDevice = hid_open(attributes->vendor_id, attributes->product_id, NULL);
+					if (PortalDevice) {
+						UE_LOG(LogHIDApi, Display, TEXT("Successful connection to Portal."));
+
+						// Free the device list
+						hid_free_enumeration(list);
+						return true;
+					}
+
+					break;
+				}
+			}
+		}
+
+		// Move to the next device in the list
+		attributes = attributes->next;
+	}
+
+	// Free the device list
+	hid_free_enumeration(list);
+	UE_LOG(LogHIDApi, Error, TEXT("No Portals found"));
+	return false;
+}
+
+
+
+void USkyPortalSubsystem::ReadPortal() {
+	if (PortalDevice) {
+		hid_read(PortalDevice, PortalRawData, 16);
+		//RawDataArray.Append(PortalRawData, 16);
+	}
+
+}
+

Source/SkyPortal/Public/SkyPortalSubsystem.h

@@ -2,8 +2,17 @@
 
 #include "CoreMinimal.h"
 #include "Subsystems/EngineSubsystem.h"
+#include "hidapi.h"
+
+
 #include "SkyPortalSubsystem.generated.h"
 
+
+/* Macro Definitions */
+#define TIMEOUT 30000
+DECLARE_LOG_CATEGORY_EXTERN(LogHIDApi, Log, All);
+
+/* Subsystem */
 UCLASS()
 class SKYPORTAL_API USkyPortalSubsystem : public UEngineSubsystem
 {
@@ -13,4 +22,30 @@ public:
 	// Override initialization and deinitialization methods
 	virtual void Initialize(FSubsystemCollectionBase& Collection) override;
 	virtual void Deinitialize() override;
+
+	// Connect to Portal, return false if portal is not found
+	UFUNCTION(BlueprintCallable, CallInEditor)
+	bool ConnectPortal();
+
+	FString HidError;
+
+private:
+	//Portal ref used in the subsystem
+	hid_device* PortalDevice;
+
+	unsigned char* PortalRawData;
+
+	FString RawData();
+	void ReadPortal();
+
+protected:
+
+	//Constants
+	const int VendorIds[4] = { 0x12ba, 0x54c, 0x1430, 0x1430 };
+	const int ProductIds[4] = { 0x150, 0x967, 0x1f17 };
+
+	/////Defaults values, should not be used
+	const int VendorId = 5168;
+	const int ProductId = 336;
 };
+