Add comments for ScenarioStateStore related code (#1433)

src/WireMock.Net.Minimal/Handlers/FileBasedScenarioStateStore.cs

@@ -1,43 +1,53 @@
 // Copyright © WireMock.Net
 
-using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using System.IO;
-using System.Linq;
 using Newtonsoft.Json;
+using Stef.Validation;
 
 namespace WireMock.Handlers;
 
+/// <summary>
+/// Provides a file-based implementation of <see cref="IScenarioStateStore" /> that persists scenario states to disk and allows concurrent access.
+/// </summary>
 public class FileBasedScenarioStateStore : IScenarioStateStore
 {
     private readonly ConcurrentDictionary<string, ScenarioState> _scenarios = new(StringComparer.OrdinalIgnoreCase);
     private readonly string _scenariosFolder;
     private readonly object _lock = new();
 
+    /// <summary>
+    /// Initializes a new instance of the FileBasedScenarioStateStore class using the specified root folder as the base directory for scenario state storage.
+    /// </summary>
+    /// <param name="rootFolder">The root directory under which scenario state data will be stored. Must be a valid file system path.</param>
     public FileBasedScenarioStateStore(string rootFolder)
     {
+        Guard.NotNullOrEmpty(rootFolder);
+
         _scenariosFolder = Path.Combine(rootFolder, "__admin", "scenarios");
         Directory.CreateDirectory(_scenariosFolder);
         LoadScenariosFromDisk();
     }
 
+    /// <inheritdoc />
     public bool TryGet(string name, [NotNullWhen(true)] out ScenarioState? state)
     {
         return _scenarios.TryGetValue(name, out state);
     }
 
+    /// <inheritdoc />
     public IReadOnlyList<ScenarioState> GetAll()
     {
         return _scenarios.Values.ToArray();
     }
 
+    /// <inheritdoc />
     public bool ContainsKey(string name)
     {
         return _scenarios.ContainsKey(name);
     }
 
+    /// <inheritdoc />
     public bool TryAdd(string name, ScenarioState scenarioState)
     {
         if (_scenarios.TryAdd(name, scenarioState))
@@ -49,6 +59,7 @@ public class FileBasedScenarioStateStore : IScenarioStateStore
         return false;
     }
 
+    /// <inheritdoc />
     public ScenarioState AddOrUpdate(string name, Func<string, ScenarioState> addFactory, Func<string, ScenarioState, ScenarioState> updateFactory)
     {
         lock (_lock)
@@ -59,6 +70,7 @@ public class FileBasedScenarioStateStore : IScenarioStateStore
         }
     }
 
+    /// <inheritdoc />
     public ScenarioState? Update(string name, Action<ScenarioState> updateAction)
     {
         lock (_lock)
@@ -74,6 +86,7 @@ public class FileBasedScenarioStateStore : IScenarioStateStore
         }
     }
 
+    /// <inheritdoc />
     public bool TryRemove(string name)
     {
         if (_scenarios.TryRemove(name, out _))
@@ -85,6 +98,7 @@ public class FileBasedScenarioStateStore : IScenarioStateStore
         return false;
     }
 
+    /// <inheritdoc />
     public void Clear()
     {
         _scenarios.Clear();
@@ -128,4 +142,4 @@ public class FileBasedScenarioStateStore : IScenarioStateStore
             }
         }
     }
-}
+}