Refactor serials

Toolkit.Foundation/SerialContextFactory.cs

@@ -0,0 +1,39 @@
+using Microsoft.Extensions.DependencyInjection;
+using System.IO.Ports;
+
+namespace Toolkit.Foundation;
+
+public class SerialContextFactory(IServiceProvider provider,
+    IServiceFactory factory) : 
+    ISerialContextFactory
+{
+    private readonly Dictionary<ISerialConfiguration, ISerialContext> cache = [];
+
+    public ISerialContext<TReader, TValue, TEvent>? Create<TConfiguration, TReader, TValue, TEvent>()
+        where TConfiguration : ISerialConfiguration
+        where TReader : SerialReader<TValue>
+        where TEvent : SerialEventArgs<TValue>, new()
+    {
+        if (provider.GetRequiredService<TConfiguration>() is TConfiguration configuration)
+        {
+            if (cache.TryGetValue(configuration, out ISerialContext? context))
+            {
+                return (ISerialContext<TReader, TValue, TEvent>)context;
+            }
+
+            SerialPort serialPort = new(configuration.PortName, configuration.BaudRate);
+            serialPort.ReadTimeout = 500;  // Prevents blocking if no data is available
+            serialPort.WriteTimeout = 500;
+
+            SerialConnection connection = new(serialPort);
+            SerialStreamer streamer = new(serialPort);
+
+            context = factory.Create<SerialContext<TReader, TValue, TEvent>>(connection, streamer);
+            cache.Add(configuration, context);
+
+            return (ISerialContext<TReader, TValue, TEvent>)context;
+        }
+
+        return default;
+    }
+}