From 3820cbc13ebdcfdd40e9d60d49c46e10a6358421 Mon Sep 17 00:00:00 2001
From: Maff <hi@maff.scot>
Date: Thu, 22 Aug 2019 01:45:15 +0100
Subject: [PATCH] idgaf how weird this code is right now

---
 libsharperang/usb.cs          | 27 +++++++++++++++++++++++----
 sharperang/MainWindow.xaml.cs |  2 ++
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/libsharperang/usb.cs b/libsharperang/usb.cs
index 4076ee3..a99aaa9 100644
--- a/libsharperang/usb.cs
+++ b/libsharperang/usb.cs
@@ -21,31 +21,50 @@ namespace libsharperang {
 			// the printer from usbprint to WinUSB
 			if (UsbDevice.AllWinUsbDevices.Count == 0) return false;
 			//genuinely just having some fun with Linq, don't judge me.
+			//TODO: work out a way of distinguishing multiple devices with same GUID
+			// which happens when two of the same device are connected
+			// the only thing that differs seemingly is the Address
 			pInstances = (from d in UsbDevice.AllWinUsbDevices
 										where d.Vid == idVendor && d.Pid == idProduct
 										select d)
 										.ToList<UsbRegistry>();
 			pIds = (from d in pInstances
 							select d.DeviceInterfaceGuids[0])
-							//.Distinct()
+							.Distinct()
 							.ToList<Guid>();
 			return (pIds.Count > 0);
 		}
+		public List<int> GetAddressesFromGuid(Guid deviceId) {
+			return (from d in UsbDevice.AllWinUsbDevices
+							where d.DeviceInterfaceGuids.Contains(deviceId)
+							select d.DeviceProperties.Where(k => k.Key=="Address").FirstOrDefault().Value).ToList().ConvertAll(v => (int)v);
+		}
 		public bool OpenUSB() {
 			if (UsbDevice.AllWinUsbDevices.Count == 0) return false;
 			if (pIds.Count == 0) return false;
 			return OpenUSB(pIds.FirstOrDefault());
 		}
 		public bool OpenUSB(Guid deviceId) {
-			bool OpenResult = UsbDevice.OpenUsbDevice(
-				ref deviceId, out UsbDevice handle);
+			return OpenUSB(deviceId, GetAddressesFromGuid(deviceId).FirstOrDefault());
+		}
+		public bool OpenUSB(Guid deviceId, int deviceIndex) {
+			//first thought is to say "forgive me lord for i have sinned" but i am absolutely not repentant for this
+			bool OpenResult = (from d in UsbDevice.AllWinUsbDevices
+												 where d.DeviceInterfaceGuids.Contains(deviceId) && 
+														d.DeviceProperties.Where(k=>k.Key=="Address" && (int)k.Value==deviceIndex).Count() > 0
+												 select d)
+												 .FirstOrDefault()
+												 .Open(out UsbDevice handle);
 			printer=handle;
 			return OpenResult;
 		}
 
 		public string FoundPrinterGuids() => pIds
-																					.ConvertAll<string>(p => p.ToString())
+																					.ConvertAll(p => p.ToString())
 																					.Aggregate((a, b) => a+","+b);
+		public string FoundPrinterGuidAddrs(Guid deviceId) => GetAddressesFromGuid(deviceId)
+																													.ConvertAll(a => a.ToString())
+																													.Aggregate((a, b) => a+","+b);
 		public string FoundProdIds() => printer?.Info.ProductString;
 	}
 }
diff --git a/sharperang/MainWindow.xaml.cs b/sharperang/MainWindow.xaml.cs
index 97484ac..cbd812d 100644
--- a/sharperang/MainWindow.xaml.cs
+++ b/sharperang/MainWindow.xaml.cs
@@ -25,6 +25,8 @@ namespace sharperang {
 			printer = new libsharperang.USB();
 			logger.Debug("libusb init gave "+printer.InitUSB());
 			logger.Debug("found Guids are "+printer.FoundPrinterGuids());
+			printer.pIds.ForEach(p => logger.Debug("found Addrs for guid "+p.ToString()+" are "+printer.FoundPrinterGuidAddrs(p)));
+			logger.Debug("open gave "+printer.OpenUSB(printer.pIds[0]));
 		}
 	}
 }