add some default types to de-duplicate similar implmentations

Pilz.Net/Api/Client/BaseChildItemClient.cs

@@ -0,0 +1,34 @@
+using Pilz.Net.Api.Messages;
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public abstract class BaseChildItemClient<T>(IApiClient client) : BaseClient<T>(client), IBaseChildItemClient<T> where T : IDataObject
+{
+    public virtual async Task<IEnumerable<T>> GetAll(int parentId) 
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Items>(ApiEndpoint, HttpMethod.Get, new ApiParameterCollection
+        {
+            ["parent"] = parentId,
+        })).EnsureOk().Items;
+    }
+
+    public override async Task<T> Save(T item)
+    {
+        if (item.Id == 0)
+            throw new NullReferenceException("Item has no parent yet!");
+        return await base.Save(item);
+    }
+
+    public virtual async Task<T> Save(T item, int parentId)
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Item>(
+            ApiEndpoint,
+            HttpMethod.Post,
+            GenerateUpdateMessage(item, true),
+            new ApiParameterCollection
+            {
+                ["parent"] = parentId,
+            })).EnsureOk().Item;
+    }
+}

Pilz.Net/Api/Client/BaseClient.cs

@@ -0,0 +1,30 @@
+using Pilz.Net.Api.Messages;
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public abstract class BaseClient<T>(IApiClient client) : IBaseClient<T> where T : IDataObject
+{
+    public abstract string ApiEndpoint { get; }
+
+    public virtual async Task<T> Get(int id)
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Item>($"{ApiEndpoint}/{id}", HttpMethod.Get)).EnsureOk().Item;
+    }
+
+    public virtual async Task Delete(int id)
+    {
+        (await client.SendRequest($"{ApiEndpoint}/{id}", HttpMethod.Delete)).EnsureOk();
+    }
+
+    public virtual async Task<T> Save(T item)
+    {
+        var generateNew = item.Id == 0;
+        return (await client.SendRequest<GeneralItemMessages<T>.Item>(
+            generateNew ? ApiEndpoint : $"{ApiEndpoint}/{item.Id}",
+            generateNew ? HttpMethod.Post : HttpMethod.Put,
+            GenerateUpdateMessage(item, generateNew))).EnsureOk().Item;
+    }
+
+    protected abstract ApiMessage GenerateUpdateMessage(T item, bool generateNew);
+}

Pilz.Net/Api/Client/BaseItemClient.cs

@@ -0,0 +1,12 @@
+using Pilz.Net.Api.Messages;
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public abstract class BaseItemClient<T>(IApiClient client) : BaseClient<T>(client), IBaseItemClient<T> where T : IDataObject
+{
+    public virtual async Task<IEnumerable<T>> GetAll() 
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Items>(ApiEndpoint, HttpMethod.Get)).EnsureOk().Items;
+    }
+}

Pilz.Net/Api/Client/IBaseChildItemClient.cs

@@ -0,0 +1,9 @@
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public interface IBaseChildItemClient<T> : IBaseClient<T> where T : IDataObject
+{
+    Task<IEnumerable<T>> GetAll(int parentId);
+    Task<T> Save(T item, int parentId);
+}

Pilz.Net/Api/Client/IBaseClient.cs

@@ -0,0 +1,10 @@
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public interface IBaseClient<T> where T : IDataObject
+{
+    Task Delete(int id);
+    Task<T> Get(int id);
+    Task<T> Save(T item);
+}

Pilz.Net/Api/Client/IBaseItemClient.cs

@@ -0,0 +1,8 @@
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public interface IBaseItemClient<T> : IBaseClient<T> where T : IDataObject
+{
+    Task<IEnumerable<T>> GetAll();
+}