Initial commit

Initial commit til Git.
V2 er deployed

PointOfSale/Utilities/ESCPOS_NET/Printers/NetworkPrinter.cs

@@ -0,0 +1,101 @@
+using Microsoft.Extensions.Logging;
+using SimpleTcp;
+using System;
+using System.IO;
+using System.Net;
+using System.Text.Json;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Reflection;
+
+namespace ESCPOS_NET
+{
+    public class NetworkPrinterSettings
+    {
+        // Connection string is of the form printer_name:port or ip:port
+        public string ConnectionString { get; set; }
+        public EventHandler ConnectedHandler { get; set; }
+        public EventHandler DisconnectedHandler { get; set; }
+        //public bool ReconnectOnTimeout { get; set; }
+        //public uint? ReceiveTimeoutMs { get; set; }
+        //public uint? SendTimeoutMs { get; set; }
+        //public uint? ConnectTimeoutMs { get; set; }
+        //public uint? ReconnectTimeoutMs { get; set; }
+        //public uint? MaxReconnectAttempts { get; set; }
+        public string PrinterName { get; set; }
+    }
+    public class NetworkPrinter : BasePrinter
+    {
+        private readonly NetworkPrinterSettings _settings;
+        private TCPConnection _tcpConnection;
+
+        public NetworkPrinter(NetworkPrinterSettings settings) : base(settings.PrinterName)
+        {
+            _settings = settings;
+            if (settings.ConnectedHandler != null)
+            {
+                Connected += settings.ConnectedHandler;
+            }
+            if (settings.DisconnectedHandler != null)
+            {
+                Disconnected += settings.DisconnectedHandler;
+            }
+            Connect();
+        }
+
+        private void ConnectedEvent(object sender, ClientConnectedEventArgs e)
+        {
+            Logging.Logger?.LogInformation("[{Function}]:[{PrinterName}] Connected successfully to network printer! Connection String: {ConnectionString}", $"{this}.{MethodBase.GetCurrentMethod().Name}", PrinterName, _settings.ConnectionString);
+            IsConnected = true;
+            InvokeConnect();
+        }
+        private void DisconnectedEvent(object sender, ClientDisconnectedEventArgs e)
+        {
+            IsConnected = false;
+            InvokeDisconnect();
+            Logging.Logger?.LogWarning("[{Function}]:[{PrinterName}] Network printer connection terminated. Attempting to reconnect. Connection String: {ConnectionString}", $"{this}.{MethodBase.GetCurrentMethod().Name}", PrinterName, _settings.ConnectionString);
+            Connect();
+        }
+        private void AttemptReconnectInfinitely()
+        {
+            try
+            {
+                //_tcpConnection.ConnectWithRetries(300000);
+                _tcpConnection.ConnectWithRetries(3000);
+            }
+            catch (Exception e)
+            {
+                //Logging.Logger?.LogWarning("[{Function}]:[{PrinterName}] Network printer unable to connect after 5 minutes. Attempting to reconnect. Settings: {Settings}", $"{this}.{MethodBase.GetCurrentMethod().Name}", PrinterName, JsonSerializer.Serialize(_settings));
+                Task.Run(async () => { await Task.Delay(250); Connect(); });
+            }
+        }
+
+        private void Connect()
+        {
+            if (_tcpConnection != null)
+            {
+                _tcpConnection.Connected -= ConnectedEvent;
+                _tcpConnection.Disconnected -= DisconnectedEvent;
+            }
+
+            // instantiate
+            _tcpConnection = new TCPConnection(_settings.ConnectionString);
+
+            // set events
+            _tcpConnection.Connected += ConnectedEvent;
+            _tcpConnection.Disconnected += DisconnectedEvent;
+
+            Reader = new BinaryReader(_tcpConnection.ReadStream);
+            Writer = new BinaryWriter(_tcpConnection.WriteStream);
+
+            Task.Run(() => { AttemptReconnectInfinitely(); });
+        }
+
+        protected override void OverridableDispose()
+        {
+            _tcpConnection = null;
+        }
+    }
+}