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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using Microsoft.AspNetCore.SignalR;
using Microsoft.AspNetCore.SignalR.Protocol;
using Microsoft.Extensions.DependencyInjection.Extensions;
namespace Microsoft.Extensions.DependencyInjection;
/// <summary>
/// Extension methods for <see cref="ISignalRBuilder"/>.
/// </summary>
public static class JsonProtocolDependencyInjectionExtensions
{
/// <summary>
/// Enables the JSON protocol for SignalR.
/// </summary>
/// <remarks>
/// This has no effect if the JSON protocol has already been enabled.
/// </remarks>
/// <param name="builder">The <see cref="ISignalRBuilder"/> representing the SignalR server to add JSON protocol support to.</param>
/// <returns>The value of <paramref name="builder"/></returns>
public static TBuilder AddJsonProtocol<TBuilder>(this TBuilder builder) where TBuilder : ISignalRBuilder
=> AddJsonProtocol(builder, _ => { });
/// <summary>
/// Enables the JSON protocol for SignalR and allows options for the JSON protocol to be configured.
/// </summary>
/// <remarks>
/// Any options configured here will be applied, even if the JSON protocol has already been registered with the server.
/// </remarks>
/// <param name="builder">The <see cref="ISignalRBuilder"/> representing the SignalR server to add JSON protocol support to.</param>
/// <param name="configure">A delegate that can be used to configure the <see cref="JsonHubProtocolOptions"/></param>
/// <returns>The value of <paramref name="builder"/></returns>
public static TBuilder AddJsonProtocol<TBuilder>(this TBuilder builder, Action<JsonHubProtocolOptions> configure) where TBuilder : ISignalRBuilder
{
builder.Services.TryAddEnumerable(ServiceDescriptor.Singleton<IHubProtocol, JsonHubProtocol>());
builder.Services.Configure(configure);
return builder;
}
}
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