more work on api & rename to Pilz.Net

Pilz.Net/Api/ApiClient.cs

@@ -0,0 +1,42 @@
+namespace Pilz.Net.Api;
+
+public class ApiClient(string apiUrl) : IApiClient
+{
+    protected readonly HttpClient httpClient = new();
+
+    public virtual string ApiUrl { get; } = apiUrl;
+
+    public string? AuthKey { get; set; }
+
+    public virtual IMessageSerializer Serializer { get; set; } = new DefaultMessageSerializer();
+
+    public virtual async Task<ApiResponse> SendMessage<TResponse>(string url, ApiMessage message, IMessageSerializer? serializer)
+    {
+        serializer ??= Serializer;
+
+        var res = await Send(url, message, serializer);
+
+        return new(res.StatusCode);
+    }
+
+    public virtual async Task<ApiResponse<TResponse>> SendRequest<TResponse>(string url, ApiMessage message, IMessageSerializer? serializer) where TResponse : ApiMessage
+    {
+        serializer ??= Serializer;
+
+        var res = await Send(url, message, serializer);
+        TResponse? result = null;
+
+        if (res.IsSuccessStatusCode)
+            result = serializer.Deserialize(await res.Content.ReadAsStringAsync(), typeof(TResponse)) as TResponse;
+
+        return new(res.StatusCode, result);
+    }
+
+    protected virtual async Task<HttpResponseMessage> Send(string url, ApiMessage message, IMessageSerializer serializer)
+    {
+        var fullRequestUrl = ApiUrl + url;
+        var content = new StringContent(serializer.Serialize(message)!, null, "application/json");
+        content.Headers.Add("API-AUTH-KEY", AuthKey);
+        return await httpClient.PostAsync(fullRequestUrl, content);
+    }
+}