Weighing: Add ICommandScale and IEventScale

Elwig/Helpers/Weighing/InvalidScale.cs

@@ -1,44 +1,19 @@
 using System;
-using System.Threading.Tasks;
 
 namespace Elwig.Helpers.Weighing {
-    public class InvalidScale : IScale {
+    public class InvalidScale(string id) : IScale {
 
         public string Manufacturer => "NONE";
         public string Model => "NONE";
-        public string ScaleId { get; private set; }
+        public string ScaleId => id;
         public int InternalScaleNr => 0;
         public bool IsReady => false;
         public bool HasFillingClearance => false;
         public int? WeightLimit => null;
         public string? LogPath => null;
 
-        public InvalidScale(string id) {
-            ScaleId = id;
-        }
-
         public void Dispose() {
             GC.SuppressFinalize(this);
         }
-
-        public Task<WeighingResult> Weigh() {
-            throw new NotImplementedException();
-        }
-
-        public Task<WeighingResult> GetCurrentWeight() {
-            throw new NotImplementedException();
-        }
-
-        public Task Empty() {
-            throw new NotImplementedException();
-        }
-
-        public Task GrantFillingClearance() {
-            throw new NotImplementedException();
-        }
-
-        public Task RevokeFillingClearance() {
-            throw new NotImplementedException();
-        }
     }
 }