* warnings fixes

src/Telegrator.Hosting.Web/GlobalSuppressions.cs

@@ -9,3 +9,4 @@ using System.Diagnostics.CodeAnalysis;
 [assembly: SuppressMessage("Style", "IDE0090")]
 [assembly: SuppressMessage("Usage", "CA2254")]
 [assembly: SuppressMessage("Maintainability", "CA1510")]
+[assembly: SuppressMessage("Style", "IDE0270")]

src/Telegrator.Hosting/GlobalSuppressions.cs

@@ -9,3 +9,4 @@ using System.Diagnostics.CodeAnalysis;
 [assembly: SuppressMessage("Style", "IDE0090")]
 [assembly: SuppressMessage("Usage", "CA2254")]
 [assembly: SuppressMessage("Maintainability", "CA1510")]
+[assembly: SuppressMessage("Style", "IDE0270")]

src/Telegrator/GlobalSuppressions.cs

@@ -8,3 +8,4 @@ using System.Diagnostics.CodeAnalysis;
 [assembly: SuppressMessage("Style", "IDE0290")]
 [assembly: SuppressMessage("Style", "IDE0090")]
 [assembly: SuppressMessage("Style", "IDE0057")]
+[assembly: SuppressMessage("Style", "IDE0270")]

src/Telegrator/Handlers/Building/TypesExtensions.cs

@@ -58,7 +58,8 @@ public static partial class HandlerBuilderExtensions
         handlerBuilder.AddFilters(filters);
         return handlerBuilder;
     }
-
+    
+#pragma warning disable CS1574
     /// <inheritdoc cref="HandlerBuilderBase.SetState{TKey, TValue}(TValue?)"/>
     public static TBuilder SetState<TBuilder, TKey, TValue>(this TBuilder handlerBuilder, TValue? myState)
         where TBuilder : HandlerBuilderBase
@@ -68,6 +69,7 @@ public static partial class HandlerBuilderExtensions
         handlerBuilder.SetState<TKey, TValue>(myState);
         return handlerBuilder;
     }
+#pragma warning restore CS1574
 
     /// <summary>
     /// Adds a targeted filter for a specific filter target type.

src/Telegrator/States/DefaultStateStorage.cs

@@ -16,7 +16,7 @@ public class DefaultStateStorage : IStateStorage
         if (key is null)
             throw new ArgumentNullException(nameof(key));
 
-        if (!storage.TryRemove(key, out object value))
+        if (!storage.TryRemove(key, out _))
             throw new Exception("Failed to remove key '" + key + "' from storage.");
 
         return Task.CompletedTask;

src/Telegrator/States/EnumStateMachine.cs

@@ -10,7 +10,7 @@ namespace Telegrator.States;
 public class EnumStateMachine<TEnum> : IStateMachine<TEnum> where TEnum : struct, Enum, IEquatable<TEnum>
 {
     private readonly TEnum[] _states = Enum.GetValues(typeof(TEnum)).Cast<TEnum>().ToArray();
-    private TEnum _defaultState => _states.FirstOrDefault();
+    private TEnum DefaultState => _states.FirstOrDefault();
 
     /// <inheritdoc/>
     public async Task<TEnum> Current(IStateStorage storage, string updateKey, CancellationToken cancellationToken = default)
@@ -19,7 +19,7 @@ public class EnumStateMachine<TEnum> : IStateMachine<TEnum> where TEnum : struct
         TEnum state = await storage.GetAsync<TEnum>(key, cancellationToken);
 
         return EqualityComparer<TEnum>.Default.Equals(state, default)
-            ? _defaultState : state;
+            ? DefaultState : state;
     }
 
     /// <inheritdoc/>
@@ -54,7 +54,7 @@ public class EnumStateMachine<TEnum> : IStateMachine<TEnum> where TEnum : struct
     public async Task Reset(IStateStorage storage, string updateKey, CancellationToken cancellationToken = default)
     {
         string key = FormatKey(updateKey);
-        await storage.SetAsync(key, _defaultState, cancellationToken);
+        await storage.SetAsync(key, DefaultState, cancellationToken);
     }
 
     private static string FormatKey(string updateKey)

src/Telegrator/Telegrator.csproj

@@ -32,6 +32,7 @@
   </ItemGroup>
   
   <ItemGroup>
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.3" />
     <PackageReference Include="System.Threading.Channels" Version="10.0.3" />
     <PackageReference Include="Telegram.Bot" Version="22.9.5.3" />	  
   </ItemGroup>

src/Telegrator/TypesExtensions.cs

@@ -515,6 +515,21 @@ public static partial class HandlersCollectionExtensions
 /// </summary>
 public static partial class UpdateExtensions
 {
+    /// <summary>
+    /// Extracts the IETF language tag of the user's client from the update.
+    /// </summary>
+    public static string? GetUserLanguageCode(this Update update) => update switch
+    {
+        { Message.From: { } from } => from.LanguageCode,
+        { EditedMessage.From: { } from } => from.LanguageCode,
+        { CallbackQuery.From: { } from } => from.LanguageCode,
+        { InlineQuery.From: { } from } => from.LanguageCode,
+        { ChatJoinRequest.From: { } from } => from.LanguageCode,
+        { PreCheckoutQuery.From: { } from } => from.LanguageCode,
+        { ShippingQuery.From: { } from } => from.LanguageCode,
+        _ => null
+    };
+
     /// <summary>
     /// Selects from Update an object from which you can get the sender's ID
     /// </summary>