feature: Server error provider added, client notification service added

WotBlitzStatisticsPro.Blazor/Services/GraphQlBackendService.cs

@@ -1,6 +1,8 @@
 using System.Collections.Generic;
 using System.Globalization;
 using System.Threading.Tasks;
+using Newtonsoft.Json.Linq;
+using StrawberryShake;
 using WotBlitzStatisticsPro.Blazor.GraphQl;
 
 namespace WotBlitzStatisticsPro.Blazor.Services
@@ -8,10 +10,14 @@ namespace WotBlitzStatisticsPro.Blazor.Services
     public class GraphQlBackendService: IGraphQlBackendService
     {
         private readonly WotBlitzStatisticsProClient _client;
+        private readonly INotificationsService _notificationsService;
 
-        public GraphQlBackendService(WotBlitzStatisticsProClient client)
+        public GraphQlBackendService(
+            WotBlitzStatisticsProClient client,
+            INotificationsService notificationsService)
         {
             _client = client;
+            _notificationsService = notificationsService;
         }
 
         public async Task<IReadOnlyList<IFindPlayers_Players>?> FindPlayers(string accountNick, RealmType realmType)
@@ -19,6 +25,7 @@ namespace WotBlitzStatisticsPro.Blazor.Services
             var accounts =
                 await _client.FindPlayers.ExecuteAsync(accountNick, realmType, GetLanguage());
 
+            CheckErrors(accounts.Errors);
             return accounts.Data?.Players;
         }
 
@@ -27,6 +34,7 @@ namespace WotBlitzStatisticsPro.Blazor.Services
             var clans =
                 await _client.FindClans.ExecuteAsync(clanNameOrTag, realmType, GetLanguage());
 
+            CheckErrors(clans.Errors);
             return clans.Data?.Clans;
         }
 
@@ -45,5 +53,39 @@ namespace WotBlitzStatisticsPro.Blazor.Services
             }
         }
 
+        private void CheckErrors(IReadOnlyCollection<IClientError> errors)
+        {
+            var messages = new List<string>();
+
+            if (errors.Count > 0)
+            {
+                foreach (var error in errors)
+                {
+                    if (error.Extensions != null)
+                    {
+                        foreach (var errorExt in error.Extensions)
+                        {
+                            var serializedError = errorExt.Value;
+                            if (serializedError is string realError)
+                            {
+                                var jObject = JObject.Parse(realError);
+                                var firstErrorInfo = jObject["errors"]?[0];
+                                var message = firstErrorInfo?["extensions"]?["message"];
+                                if (message != null)
+                                {
+                                    messages.Add(message.ToString());
+                                }
+                            }
+                        }
+                    }   
+                }
+            }
+
+            if (messages.Count > 0)
+            {
+                _notificationsService.ReportError("Backend error",string.Join(";", messages));
+            }
+        }
+
     }
 }