feat: Clan Resolver first step

WotBlitzStatisticsPro.GraphQl/Helpers/ParametersParser.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Linq;
+using HotChocolate.Language;
+using WotBlitzStatisticsPro.Common.Model;
+
+namespace WotBlitzStatisticsPro.GraphQl.Helpers
+{
+    public static class ParametersParser
+    {
+        private const RealmType DefaultRealm = RealmType.Ru;
+        private const RequestLanguage DefaultRequestLanguage = RequestLanguage.En;
+
+        public static RealmAndLanguage ParseOperation(this OperationDefinitionNode operationDefinition)
+        {
+            var realm = DefaultRealm;
+            var language = DefaultRequestLanguage;
+            var selections = operationDefinition?.SelectionSet.Selections.ToArray();
+            if (selections != null && selections.Length == 1)
+            {
+                var node = selections[0] as FieldNode;
+                if (node?.Arguments != null)
+                {
+                    foreach (var argument in node.Arguments.Where(a => a != null))
+                    {
+                        switch (argument.Name.Value)
+                        {
+                            case "realmType" when argument?.Value?.Value != null:
+                                realm = (RealmType)Enum.Parse(typeof(RealmType), argument.Value.Value.ToString() ?? "Ru", true);
+                                break;
+                            case "requestLanguage" when argument?.Value?.Value != null:
+                                language = (RequestLanguage)Enum.Parse(typeof(RequestLanguage), argument.Value.Value.ToString() ?? "En", true);
+                                break;
+                        }
+                    }
+                }
+            }
+
+            return new (realm, language);
+        }
+
+    }
+}