move Watchdog related code into its own class

csharp/App/SaliMax/src/Program.cs

@@ -31,8 +31,7 @@ namespace InnovEnergy.App.SaliMax;
 
 internal static class Program
 {
-    [DllImport("libsystemd.so.0")]
+    
-    private static extern Int32 sd_notify(Int32 unsetEnvironment, String state);
 
     private static readonly UnixTimeSpan UpdateInterval = UnixTimeSpan.FromSeconds(2);
     
@@ -85,8 +84,7 @@ internal static class Program
     {
         "Starting SaliMax".LogInfo();
         
-        // Send the initial "service started" message to systemd
+        Watchdog.Ready();
-        var sdNotifyReturn = sd_notify(0, "READY=1");
 
         var battery48TlDevices = BatteryNodes
                                 .Select(n => new Battery48TlDevice(BatteriesChannel, n))
@@ -102,15 +100,15 @@ internal static class Program
 
         StatusRecord ReadStatus()
         {
+            "Reading battery".LogInfo();
+            var battery        = batteryDevices.Read().WriteLine();
+            
             "Reading AcDC".LogInfo();
             var acDc           = acDcDevices.Read();
             
-            "Reading dcDc".LogInfo();
+            "Reading DcDc".LogInfo();
             var dcDc           = dcDcDevices.Read();
             
-            "Reading battery".LogInfo();
-            var battery        = batteryDevices.Read();
-            
             "Reading relays".LogInfo();
             var relays         = saliMaxRelaysDevice.Read();
             
@@ -204,16 +202,14 @@ internal static class Program
 
         StatusRecord RunIteration()
         {
-            sd_notify(0, "WATCHDOG=1");
+            Watchdog.Alive();
 
             var t = UnixTime.Now;
             var record = ReadStatus();
 
-            if (record.Relays is not null)
+            record.Relays?.ToCsv().LogInfo();
-                record.Relays.ToCsv().LogInfo();
 
             record.ControlConstants();
-
             record.ControlSystemState();
 
             (t + "\n").LogInfo();

csharp/App/SaliMax/src/Watchdog.cs

@@ -0,0 +1,14 @@
+using System.Runtime.InteropServices;
+
+namespace InnovEnergy.App.SaliMax;
+
+// https://www.freedesktop.org/software/systemd/man/sd_notify.html
+public static class Watchdog
+{
+    // "it is generally recommended to ignore the return value of this call. "
+    [DllImport("libsystemd.so.0")]
+    private static extern Int32 sd_notify(Int32 unsetEnvironment, String state);
+
+    public static void Ready() => _ = sd_notify(0, "READY=1");
+    public static void Alive() => _ = sd_notify(0, "WATCHDOG=1");
+}

csharp/Lib/Utils/ConsoleUtils.cs

@@ -38,7 +38,6 @@ public static class ConsoleUtils
         return t;
     }
 
-
     public static T Write<T>(this T t, ConsoleColor color)
     {
         var c = Console.ForegroundColor;