Implement AuthService and ApiClient core logic

Core/ApiClient.cs

@@ -0,0 +1,36 @@
+using Newtonsoft.Json;
+using System;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Chtn.CSharp.SDK.Core
+{
+    public class ApiClient
+    {
+        private readonly HttpClient _httpClient;
+        private readonly string _baseUrl;
+
+        public ApiClient(string baseUrl)
+        {
+            _baseUrl = baseUrl.EndsWith("/") ? baseUrl : baseUrl + "/";
+            _httpClient = new HttpClient();
+        }
+
+        public async Task<TResponse> PostAsync<TRequest, TResponse>(string endpoint, TRequest data)
+        {
+            var json = JsonConvert.SerializeObject(data);
+            var content = new StringContent(json, Encoding.UTF8, "application/json");
+
+            var response = await _httpClient.PostAsync(_baseUrl + endpoint, content);
+            var responseJson = await response.Content.ReadAsStringAsync();
+
+            if (!response.IsSuccessStatusCode)
+            {
+                throw new Exception($"API Hiba ({response.StatusCode}): {responseJson}");
+            }
+
+            return JsonConvert.DeserializeObject<TResponse>(responseJson);
+        }
+    }
+}

Core/ChateniumClient.cs

@@ -1,8 +1,6 @@
-using System;
-using System.Globalization;
-using System.Net.WebSockets;
+using Chtn.CSharpSDK.Interfaces;
+using System;
 using System.Threading.Tasks;
-using Chtn.CSharpSDK.Interfaces;
 
 
 namespace Chtn.CSharpSDK.Core

Core/EnvironmentConfig.cs

@@ -1,7 +1,7 @@
 namespace Chtn.CSharp.SDK.Core
 {
     public class SDKConfig
-        {
+    {
         public string ApiUrl { get; set; } = "https://api.chatenium.hu";
         public string CdnUrl { get; set; } = "https://cdn.chatenium.hu";
         public string WsUrl { get; set; } = "wss://api.chatenium.hu";
@@ -10,6 +10,6 @@
     public static class EnvironmentConfig
     {
         private static SDKConfig _currentConfig = new SDKConfig();
-        public static SDKConfig Get() => _currentConfig; 
+        public static SDKConfig Get() => _currentConfig;
     }
 }

Core/HttpClientFactory.cs

@@ -3,7 +3,7 @@ using System.Net.Http;
 
 namespace Chtn.CSharp.SDK.Core
 {
-    public static  class HttpClientFactory
+    public static class HttpClientFactory
     {
         public static HttpClient CreateClient(bool isCdn = false)
         {

Core/WebSocketHandler.cs

@@ -1,14 +1,12 @@
-using System;
-using System.Collections.Generic;
+using Chtn.CSharp.SDK.Core;
+using Newtonsoft.Json;
+using System;
 using System.Net.Http;
+using System.Net.Http.Headers;
 using System.Net.WebSockets;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
-using Newtonsoft.Json;
-using System.Net.Http.Headers;
-using Chtn.CSharpSDK.Interfaces;
-using Chtn.CSharp.SDK.Core;
 
 namespace Chtn.CSharpSDK.Core
 {