add some default types to de-duplicate similar implmentations

Pilz.Net/Api/Server/BaseItemHandler.cs

@@ -0,0 +1,39 @@
+using Pilz.Extensions.Reflection;
+using Pilz.Net.Data;
+using Pilz.Net.Extensions;
+using System.Diagnostics;
+
+namespace Pilz.Net.Api.Server;
+
+public abstract class BaseItemHandler<TEntity, TUpdateMsg>(IApiServer server)
+    : BaseHandler<TEntity, TUpdateMsg>(server)
+    where TEntity : IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    protected virtual bool RegisterGetAll => true;
+    protected virtual bool RegisterPost => true;
+
+    public override void Initialize(IApiServer server)
+    {
+        base.Initialize(server);
+        var t = GetType();
+        if (RegisterGetAll)
+            server.RegisterHandler(t.GetMethod(nameof(GetAll))!.CreateDelegate(this), new(Route, "GET"), Debugger.IsAttached);
+        if (RegisterPost)
+            server.RegisterHandler(t.GetMethod(nameof(Put))!.CreateDelegate(this), new(Route, "POST"), Debugger.IsAttached);
+    }
+
+    public virtual ApiResult GetAll()
+    {
+        return server.Manager.Get<TEntity>().ToList().Select(ToClient).ToItemsResult();
+    }
+
+    public virtual ApiResult Post(TUpdateMsg msg)
+    {
+        var entity = CreateNewEntity();
+        if (UpdateEntity(entity, msg) is ApiResult result)
+            return result;
+        server.Manager.Save(entity, true);
+        return entity.ToItemResult();
+    }
+}