[chronojump-server] RFID script can receive a ID_SERIAL_SHORT. and only works with FTDI.

[Xavier de Blas <xaviblas src gnome org>]

commit f3bb1385149c196c5c6ca49e07f69179ef4225c5
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Jun 21 17:23:18 2019 +0200

    RFID script can receive a ID_SERIAL_SHORT. and only works with FTDI.

 chronojumpserver-django/rfid-csharp/RFID.cs  |  97 ++++++++++++++++++++++++---
 chronojumpserver-django/rfid-csharp/RFID.exe | Bin 5632 -> 6656 bytes
 2 files changed, 88 insertions(+), 9 deletions(-)
---
diff --git a/chronojumpserver-django/rfid-csharp/RFID.cs b/chronojumpserver-django/rfid-csharp/RFID.cs
index a1838b5..48846e9 100755
--- a/chronojumpserver-django/rfid-csharp/RFID.cs
+++ b/chronojumpserver-django/rfid-csharp/RFID.cs
@@ -21,17 +21,18 @@ using System.Collections.Generic; //List<T>
 using System.IO;
 using System.IO.Ports;
 using System.Threading;
+using System.Diagnostics;
 
 public class RFIDMain
 {
        const string rfidFile =  "/tmp/chronojump_rfid.txt";
 
-       public static void Main()
+       public static void Main(string[] args)
        {
                //debug starts
                string str = "Called RFIDMain. Writing at /tmp/rfidcalled.txt";
                Console.WriteLine(str);
-       
+
                /*TextWriter writer = File.CreateText("/tmp/rfidcalled.txt");
                writer.Write(str);
                writer.Flush();
@@ -41,7 +42,11 @@ public class RFIDMain
 
                removeFile();
 
-               RFID rfid = new RFID();
+               string searchedDevice = "";
+               if(args.Length == 1)
+                       searchedDevice = args[0];
+
+               RFID rfid = new RFID(searchedDevice);
                RFID.StatusEnum status = rfid.Start();
                
                if(status == RFID.StatusEnum.DETECTED) {
@@ -73,12 +78,19 @@ public class RFID
        public enum StatusEnum { NO_PORTS, NO_RFID_PORT, NO_DETECTED, DETECTED };
 
        public string Captured;
+
+       //if searchedDevice == "" returns the first FTDI
+       //else returns the FTDI device with this ID_SERIAL_SHORT
+       private string searchedDevice;
+       private string foundDevice;
+
        private bool stop;
        //public event EventHandler ChangedEvent; //raised when change RFID vaues
        private SerialPort port;
 
-       public RFID()
+       public RFID(string searchedDevice)
        {
+               this.searchedDevice = searchedDevice;
                Captured = "";  
                stop = false;
        }
@@ -92,13 +104,10 @@ public class RFID
 
 
                string str = "";
-               /*
                bool found = findRFIDPort(l);
                if(! found)
                        return StatusEnum.NO_RFID_PORT;
-                       */
 
-               //findRFIDPort() opens the port, but now is not called
                port = new SerialPort(l[0], 9600); //for the rfid
                port.Open();
 
@@ -147,14 +156,27 @@ public class RFID
                        return StatusEnum.DETECTED;
        }
 
-       /*
        private bool findRFIDPort(List<string> l)
        {
                foreach(string p in l)
                {
                        Console.WriteLine("portName: " + p);
+
+                       foundDevice = "";
+                       if(isFTDI(p))
+                       {
+                               if(searchedDevice == "")
+                                       return true;
+                               else if(searchedDevice == foundDevice)
+                                       return true;
+                       }
+
+                       /* commented because it is slow, starting, waiting to arduino fully started to read 
string ...
+
                        port = new SerialPort(p, 9600); //for the rfid
                        port.Open();
+
+                       // this is the slow process
                        Thread.Sleep(2000); //sleep to let arduino start reading. Use 3000 if NO_RFID_PORT
                        
                        if (port.BytesToRead > 0){
@@ -182,10 +204,67 @@ public class RFID
                                Console.WriteLine("Arduino RFID NOT found on port: " + p);
 
                        port.Close();
+                       */
                }
                return(false);
        }
-       */
+
+
+       private bool isFTDI(string port)
+       {
+               Console.WriteLine("Checking if it is FTDI: " + port);
+
+               Process process = new Process();
+               ProcessStartInfo processStartInfo = new ProcessStartInfo();
+
+               //1) get path
+               processStartInfo.FileName = "udevadm";
+               processStartInfo.Arguments = "info -q path -n " +  port;
+
+               //Console.WriteLine ("ExecuteProcess FileName: " + processStartInfo.FileName);
+               //Console.WriteLine ("ExecuteProcess Arguments: " + processStartInfo.Arguments);
+
+               processStartInfo.CreateNoWindow = true;
+               processStartInfo.UseShellExecute = false;
+               processStartInfo.RedirectStandardInput = false;
+               processStartInfo.RedirectStandardError = true;
+               processStartInfo.RedirectStandardOutput = true;
+
+               process.StartInfo = processStartInfo;
+               process.Start();
+
+               string path = process.StandardOutput.ReadToEnd().TrimEnd ('\n');
+               //Console.WriteLine ("path = " + path);
+
+               if (path == "")
+                       return false;
+
+               //2) read FTDI info
+               processStartInfo.Arguments = "info -p " + path;
+               //Console.WriteLine ("ExecuteProcess Arguments: " + processStartInfo.Arguments);
+               process.StartInfo = processStartInfo;
+               process.Start();
+
+               string result = process.StandardOutput.ReadToEnd().TrimEnd ('\n');
+
+               if (result == "")
+                       return false;
+
+               bool ftdi = false;
+               foreach (string lineOut in result.Split('\n'))
+               {
+                       if (lineOut.Contains("ID_VENDOR=")) {
+                               string [] strFull = lineOut.Split(new char[] {'='});
+                               ftdi = (strFull[1] == "FTDI");
+                       } else if (lineOut.Contains("ID_SERIAL_SHORT=")) {
+                               string [] strFull = lineOut.Split(new char[] {'='});
+                               Console.WriteLine("Serial number: " + strFull[1]);
+                               foundDevice = strFull[1];
+                       }
+               }
+
+               return ftdi;
+       }
 
        private List<string> getPorts(bool debug)
        {
diff --git a/chronojumpserver-django/rfid-csharp/RFID.exe b/chronojumpserver-django/rfid-csharp/RFID.exe
index 2228e49..5d9cc43 100755
Binary files a/chronojumpserver-django/rfid-csharp/RFID.exe and 
b/chronojumpserver-django/rfid-csharp/RFID.exe differ