/// <summary>
/// Builds an <see cref="IEventHandler{TEventType}"/> from <typeparamref name="THandlerType"/> using a <see cref="FactoryFor{T}"/> to invoke the handler methods.
/// </summary>
/// <typeparam name="THandlerType">The type of the event handler to build for.</typeparam>
/// <param name="factory">The <see cref="FactoryFor{T}"/> that will be used to instantiate the event handler.</param>
/// <returns>A <see cref="IEventHandler{TEventType}"/> that can be registered with an <see cref="IRegisterEventHandlers"/>.</returns>
public static IEventHandler <TEventType> BuildFor <THandlerType>(FactoryFor <THandlerType> factory)
{
var builder = EventHandlerBuilder.Create <TEventType>().With(factory);
var handlerType = typeof(THandlerType);
foreach (var method in handlerType.GetMethods(BindingFlags.Instance | BindingFlags.DeclaredOnly | BindingFlags.Public))
{
ThrowIfMethodHasCorrectSignatureButWrongName(method);
if (method.Name == HandleMethodName)
{
ThrowIfFirstMethodParameterIsNot <TEventType>(method);
ThrowIfSecondMethodParameterIsNotEventContext(method);
ThrowIfMethodHasExtraParameters(method);
ThrowIfMethodDoesNotReturnATask(method);
TryGetFirstMethodParameter <TEventType>(method, out var eventType);
var delegateType = typeof(EventHandlerMethod <,>).MakeGenericType(handlerType, eventType);
var dynamicDelegate = method.CreateDelegate(delegateType, null);
var builderHandleMethod = typeof(EventHandlerFactoryBuilder <THandlerType, TEventType>).GetMethod(nameof(EventHandlerFactoryBuilder <THandlerType, TEventType> .Handle));
var dynamicHandleMethod = builderHandleMethod.MakeGenericMethod(eventType);
dynamicHandleMethod.Invoke(builder, new[] { dynamicDelegate });
}
}
return(builder.Build());
}
