* minor changes to state keepers

.gitignore

@@ -362,3 +362,4 @@ MigrationBackup/
 # Fody - auto-generated XML schema
 FodyWeavers.xsd
 /GETTING_STARTED.md
+/ANNOTATION_OVERVIEW.md

Telegrator/Handlers/CallbackQueryHandler.cs

@@ -110,7 +110,7 @@ namespace Telegrator.Handlers
         /// <param name="url">A URL that will be opened by the client.</param>
         /// <param name="cacheTime">The maximum amount of time in seconds that the result of the callback query may be cached client-side.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
-        protected async Task AnswerCallbackQuery(
+        protected async Task Answer(
             string? text = null,
             bool showAlert = false,
             string? url = null,

Telegrator/StateKeeping/Components/StateKeeperBase.cs

@@ -26,7 +26,7 @@ namespace Telegrator.StateKeeping.Components
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
         /// <param name="newState">The new state value.</param>
-        public void SetState(Update keySource, TState newState)
+        public virtual void SetState(Update keySource, TState newState)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             States.Set(key, newState, DefaultState);
@@ -37,7 +37,7 @@ namespace Telegrator.StateKeeping.Components
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
         /// <returns>The state value.</returns>
-        public TState GetState(Update keySource)
+        public virtual TState GetState(Update keySource)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             return States[key];
@@ -49,7 +49,7 @@ namespace Telegrator.StateKeeping.Components
         /// <param name="keySource">The update to use as a key source.</param>
         /// <param name="state">When this method returns, contains the state value if found; otherwise, the default value.</param>
         /// <returns>True if the state was found; otherwise, false.</returns>
-        public bool TryGetState(Update keySource, out TState? state)
+        public virtual bool TryGetState(Update keySource, out TState? state)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             return States.TryGetValue(key, out state);
@@ -60,7 +60,7 @@ namespace Telegrator.StateKeeping.Components
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
         /// <returns>True if the state exists; otherwise, false.</returns>
-        public bool HasState(Update keySource)
+        public virtual bool HasState(Update keySource)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             return States.ContainsKey(key);
@@ -70,7 +70,7 @@ namespace Telegrator.StateKeeping.Components
         /// Creates a state for the specified update using the default state value.
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
-        public void CreateState(Update keySource)
+        public virtual void CreateState(Update keySource)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             States.Set(key, DefaultState);
@@ -80,7 +80,7 @@ namespace Telegrator.StateKeeping.Components
         /// Deletes the state for the specified update.
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
-        public void DeleteState(Update keySource)
+        public virtual void DeleteState(Update keySource)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             States.Remove(key);
@@ -90,7 +90,7 @@ namespace Telegrator.StateKeeping.Components
         /// Moves the state forward for the specified update.
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
-        public void MoveForward(Update keySource)
+        public virtual void MoveForward(Update keySource)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
             if (!States.TryGetValue(key, out TState currentState))
@@ -107,22 +107,29 @@ namespace Telegrator.StateKeeping.Components
         /// Moves the state backward for the specified update.
         /// </summary>
         /// <param name="keySource">The update to use as a key source.</param>
-        public void MoveBackward(Update keySource)
+        public virtual void MoveBackward(Update keySource)
         {
             TKey key = KeyResolver.ResolveKey(keySource);
-            TState currentState = States[key];
+            if (!States.TryGetValue(key, out TState currentState))
+            {
+                States.Set(key, DefaultState);
+                return;
+            }
+
             TState newState = MoveBackward(currentState, key);
             States[key] = newState;
         }
 
+        /*
         /// <summary>
         /// Gets the state keeper for the specified key.
         /// </summary>
         /// <typeparam name="TStateKeeper">The type of the state keeper.</typeparam>
         /// <param name="key">The key.</param>
         /// <returns>The state keeper instance.</returns>
-        protected TStateKeeper GetKeeper<TStateKeeper>(TKey key) where TStateKeeper : StateKeeperBase<TKey, TState>
+        protected virtual TStateKeeper GetKeeper<TStateKeeper>(TKey key) where TStateKeeper : StateKeeperBase<TKey, TState>
             => States[key] as TStateKeeper ?? throw new InvalidCastException();
+        */
 
         /// <summary>
         /// Moves the state forward for the specified current state and key.

Telegrator/StateKeeping/StringStateKeeper.cs

@@ -1,25 +1,30 @@
 using Telegrator.Annotations.StateKeeping;
 using Telegrator.Handlers.Components;
+using Telegrator.StateKeeping.Components;
 
 namespace Telegrator.StateKeeping
 {
     /// <summary>
     /// State keeper that manages string-based states for chat sessions.
-    /// Inherits from <see cref="ArrayStateKeeper{TKey, TState}"/> with long keys and string states.
     /// </summary>
-    /// <param name="states">Initial array of string states to manage</param>
+    public class StringStateKeeper() : StateKeeperBase<string, string>()
-    public class StringStateKeeper(params string[] states) : ArrayStateKeeper<long, string>(states)
     {
-        /// <summary>
-        /// Initializes a new instance of <see cref="StringStateKeeper"/> with an empty state array.
-        /// </summary>
-        public StringStateKeeper()
-            : this([]) { }
-
         /// <summary>
         /// Gets the default state value, which is an empty string.
         /// </summary>
         public override string DefaultState => string.Empty;
+
+        /// <inheritdoc/>
+        protected override string MoveBackward(string currentState, string currentKey)
+        {
+            throw new NotImplementedException();
+        }
+
+        /// <inheritdoc/>
+        protected override string MoveForward(string currentState, string currentKey)
+        {
+            throw new NotImplementedException();
+        }
     }
 
     /// <summary>
@@ -58,6 +63,10 @@ namespace Telegrator.StateKeeping
         public static void SetStringState(this IHandlerContainer container, string? newState)
             => container.StringStateKeeper().SetState(container.HandlingUpdate, newState ?? StringStateAttribute.DefaultState);
 
+        public static string GetStringState(this IHandlerContainer container, string key)
+            => container.StringStateKeeper().GetState()
+
+        /*
         /// <summary>
         /// Moves the string state forward to the next state in the sequence.
         /// </summary>
@@ -71,5 +80,6 @@ namespace Telegrator.StateKeeping
         /// <param name="container">The handler container instance</param>
         public static void BackwardStringState(this IHandlerContainer container)
             => container.StringStateKeeper().MoveBackward(container.HandlingUpdate);
+        */
     }
 }