/// <summary>
/// Branches the handshake pipeline based on the result of a predicate.
/// If the predicate returns true the branch is executed.
/// </summary>
/// <param name="handshakeBuilder">The <see cref="IFramingConnectionHandshakeBuilder"/> instance.</param>
/// <param name="predicate">The request path to match.</param>
/// <param name="configuration">The branch to take for positive path matches.</param>
/// <returns>The <see cref="IFramingConnectionHandshakeBuilder"/> instance.</returns>
public static IFramingConnectionHandshakeBuilder Map(this IFramingConnectionHandshakeBuilder handshakeBuilder, Func <FramingConnection, bool> predicate, Action <IFramingConnectionHandshakeBuilder> configuration)
{
if (handshakeBuilder == null)
{
throw new ArgumentNullException(nameof(handshakeBuilder));
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
// create branch
IFramingConnectionHandshakeBuilder branchBuilder = handshakeBuilder.New();
configuration(branchBuilder);
HandshakeDelegate branch = branchBuilder.Build();
var options = new MapOptions
{
Branch = branch,
Predicate = predicate,
};
return(handshakeBuilder.Use(next => new MapMiddleware(next, options).Invoke));
}
/// <summary>
/// Creates a new instance of <see cref="MapMiddleware"/>.
/// </summary>
/// <param name="next">The delegate representing the next middleware in the request pipeline.</param>
/// <param name="options">The middleware options.</param>
public MapMiddleware(HandshakeDelegate next, MapOptions options)
{
_next = next ?? throw new ArgumentNullException(nameof(next));
_options = options ?? throw new ArgumentNullException(nameof(options));
}