Local execution of CQRS

.editorconfig

@@ -35,7 +35,6 @@ dotnet_style_predefined_type_for_member_access                           = true
 dotnet_style_readonly_field                                              = true : suggestion
 
 dotnet_style_require_accessibility_modifiers                             = always : warning
-csharp_preferred_modifier_order                                          = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async : warning
 
 dotnet_style_object_initializer                                          = true : suggestion
 dotnet_style_collection_initializer                                      = true : suggestion

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/LocalCallContext.cs

@@ -0,0 +1,80 @@
+using System.Security.Claims;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Features;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class LocalCallContext : HttpContext, IDisposable
+{
+    private const int DefaultFeatureCollectionSize = 6; // 4 internal, 2 external (set in local executors)
+
+    private readonly FeatureCollection features;
+
+    private readonly ItemsFeature itemsFeature;
+    private readonly LocalCallServiceProvidersFeature serviceProvidersFeature;
+    private readonly LocalCallLifetimeFeature callLifetimeFeature;
+
+    public override IFeatureCollection Features => features;
+
+    public override ClaimsPrincipal User { get; set; }
+    public override string TraceIdentifier { get; set; }
+    public override HttpRequest Request { get; }
+    public override HttpResponse Response { get; }
+
+    public override IDictionary<object, object?> Items
+    {
+        get => itemsFeature.Items;
+        set => itemsFeature.Items = value;
+    }
+
+    public override IServiceProvider RequestServices
+    {
+        get => serviceProvidersFeature.RequestServices;
+        set => serviceProvidersFeature.RequestServices = value;
+    }
+
+    public override CancellationToken RequestAborted
+    {
+        get => callLifetimeFeature.RequestAborted;
+        set => callLifetimeFeature.RequestAborted = value;
+    }
+
+    public CancellationToken CallAborted => callLifetimeFeature.CallAborted;
+
+    public override ConnectionInfo Connection => NullConnectionInfo.Empty;
+    public override WebSocketManager WebSockets => NullWebSocketManager.Empty;
+    public override ISession Session
+    {
+        get => NullSession.Empty;
+        set { }
+    }
+
+    public LocalCallContext(
+        IServiceProvider requestServices,
+        ClaimsPrincipal user,
+        string? activityIdentifier,
+        IHeaderDictionary? headers,
+        CancellationToken cancellationToken
+    )
+    {
+        features = new(DefaultFeatureCollectionSize);
+
+        User = user;
+        TraceIdentifier = activityIdentifier ?? "";
+        Request = new LocalHttpRequest(this, headers);
+        Response = new NullHttpResponse(this);
+
+        itemsFeature = new();
+        serviceProvidersFeature = new(requestServices);
+        callLifetimeFeature = new(cancellationToken);
+
+        features.Set<IItemsFeature>(itemsFeature);
+        features.Set<IServiceProvidersFeature>(serviceProvidersFeature);
+        features.Set<IHttpRequestLifetimeFeature>(callLifetimeFeature);
+        features.Set<IEndpointFeature>(NullEndpointFeature.Empty);
+    }
+
+    public override void Abort() => callLifetimeFeature.Abort();
+
+    public void Dispose() => callLifetimeFeature.Dispose();
+}

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/LocalCallLifetimeFeature.cs

@@ -0,0 +1,27 @@
+using Microsoft.AspNetCore.Http.Features;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class LocalCallLifetimeFeature : IHttpRequestLifetimeFeature, IDisposable
+{
+    private readonly CancellationTokenSource source;
+    private CancellationToken requestAborted;
+
+    public CancellationToken RequestAborted
+    {
+        get => requestAborted;
+        set => requestAborted = value;
+    }
+
+    public CancellationToken CallAborted => source.Token;
+
+    public LocalCallLifetimeFeature(CancellationToken cancellationToken)
+    {
+        source = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+        requestAborted = source.Token;
+    }
+
+    public void Abort() => source.Cancel();
+
+    public void Dispose() => source.Dispose();
+}

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/LocalCallServiceProvidersFeature.cs

@@ -0,0 +1,13 @@
+using Microsoft.AspNetCore.Http.Features;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class LocalCallServiceProvidersFeature : IServiceProvidersFeature
+{
+    public IServiceProvider RequestServices { get; set; }
+
+    public LocalCallServiceProvidersFeature(IServiceProvider requestServices)
+    {
+        RequestServices = requestServices;
+    }
+}

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/LocalHttpRequest.cs

@@ -0,0 +1,104 @@
+using Microsoft.AspNetCore.Http;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class LocalHttpRequest : HttpRequest
+{
+    public override HttpContext HttpContext { get; }
+    public override IHeaderDictionary Headers { get; }
+
+    public override bool HasFormContentType => false;
+
+    public override string Method
+    {
+        get => "";
+        set { }
+    }
+
+    public override string Scheme
+    {
+        get => "";
+        set { }
+    }
+
+    public override bool IsHttps
+    {
+        get => false;
+        set { }
+    }
+
+    public override HostString Host
+    {
+        get => default;
+        set { }
+    }
+
+    public override PathString PathBase
+    {
+        get => PathString.Empty;
+        set { }
+    }
+
+    public override PathString Path
+    {
+        get => PathString.Empty;
+        set { }
+    }
+
+    public override QueryString QueryString
+    {
+        get => QueryString.Empty;
+        set { }
+    }
+
+    public override IQueryCollection Query
+    {
+        get => QueryCollection.Empty;
+        set { }
+    }
+
+    public override string Protocol
+    {
+        get => "";
+        set { }
+    }
+
+    public override IRequestCookieCollection Cookies
+    {
+        get => NullRequestCookieCollection.Empty;
+        set { }
+    }
+
+    public override long? ContentLength
+    {
+        get => null;
+        set { }
+    }
+
+    public override string? ContentType
+    {
+        get => null;
+        set { }
+    }
+
+    public override Stream Body
+    {
+        get => Stream.Null;
+        set { }
+    }
+
+    public override IFormCollection Form
+    {
+        get => FormCollection.Empty;
+        set { }
+    }
+
+    public LocalHttpRequest(HttpContext httpContext, IHeaderDictionary? headers)
+    {
+        HttpContext = httpContext;
+        Headers = headers ?? new HeaderDictionary();
+    }
+
+    public override Task<IFormCollection> ReadFormAsync(CancellationToken cancellationToken = default) =>
+        Task.FromResult<IFormCollection>(FormCollection.Empty);
+}

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/NullConnectionInfo.cs

@@ -0,0 +1,51 @@
+using System.Net;
+using System.Security.Cryptography.X509Certificates;
+using Microsoft.AspNetCore.Http;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class NullConnectionInfo : ConnectionInfo
+{
+    public static readonly NullConnectionInfo Empty = new();
+
+    public override string Id
+    {
+        get => "";
+        set { }
+    }
+
+    public override IPAddress? RemoteIpAddress
+    {
+        get => null;
+        set { }
+    }
+
+    public override int RemotePort
+    {
+        get => 0;
+        set { }
+    }
+
+    public override IPAddress? LocalIpAddress
+    {
+        get => null;
+        set { }
+    }
+
+    public override int LocalPort
+    {
+        get => 0;
+        set { }
+    }
+
+    public override X509Certificate2? ClientCertificate
+    {
+        get => null;
+        set { }
+    }
+
+    private NullConnectionInfo() { }
+
+    public override Task<X509Certificate2?> GetClientCertificateAsync(CancellationToken cancellationToken = default) =>
+        Task.FromResult<X509Certificate2?>(null);
+}

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/NullEndpointFeature.cs

@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Features;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class NullEndpointFeature : IEndpointFeature
+{
+    public static readonly NullEndpointFeature Empty = new();
+
+    public Endpoint? Endpoint
+    {
+        get => null;
+        set { }
+    }
+
+    private NullEndpointFeature() { }
+}

src/CQRS/LeanCode.CQRS.AspNetCore/Local/Context/NullHeaderDictionary.cs

@@ -0,0 +1,60 @@
+using System.Collections;
+using System.Collections.ObjectModel;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Primitives;
+
+namespace LeanCode.CQRS.AspNetCore.Local.Context;
+
+internal class NullHeaderDictionary : IHeaderDictionary
+{
+    public static readonly NullHeaderDictionary Empty = new();
+
+    public StringValues this[string key]
+    {
+        get => StringValues.Empty;
+        set { }
+    }
+
+    public long? ContentLength
+    {
+        get => null;
+        set { }
+    }
+
+    public ICollection<string> Keys { get; } = new ReadOnlyCollection<string>([ ]);
+
+    public ICollection<StringValues> Values { get; } = new ReadOnlyCollection<StringValues>([ ]);
+
+    public int Count => 0;
+
+    public bool IsReadOnly => true;
+
+    private NullHeaderDictionary() { }
+
+    public void Add(string key, StringValues value) { }
+
+    public void Add(KeyValuePair<string, StringValues> item) { }
+
+    public void Clear() { }
+
+    public bool Contains(KeyValuePair<string, StringValues> item) => false;
+
+    public bool ContainsKey(string key) => false;
+
+    public void CopyTo(KeyValuePair<string, StringValues>[] array, int arrayIndex) { }
+
+    public bool Remove(string key) => false;
+
+    public bool Remove(KeyValuePair<string, StringValues> item) => false;
+
+    public bool TryGetValue(string key, out StringValues value)
+    {
+        value = StringValues.Empty;
+        return false;
+    }
+
+    public IEnumerator<KeyValuePair<string, StringValues>> GetEnumerator() =>
+        Enumerable.Empty<KeyValuePair<string, StringValues>>().GetEnumerator();
+
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+}