public UseCaseHandler <TOutput> Execute(UseCaseHandler <TOutput> handler)
{
ExecutingTask = Task.Run(async() =>
{
handler.OnStart?.Invoke();
try
{
var result = await GetUseCaseTask();
//TODO: remove this.
await Task.Delay(3000);
handler.Result = result;
handler.OnComplete?.Invoke(result);
}
catch (Exception e)
{
handler.OnError?.Invoke(e);
}
});
handler.ExecutingTask = ExecutingTask;
return(handler);
}
public UseCaseHandler <M> FromResult <M>(NextAction <M> action, UseCaseHandler <M> callbackHandler)
{
M result = default;
var nextHandler = new UseCaseHandler <M>();
nextHandler.ExecutingTask = ExecutingTask?.ContinueWith(t =>
{
callbackHandler.OnStart?.Invoke();
try
{
result = action.Invoke(Result);
callbackHandler.OnComplete?.Invoke(result);
}
catch (Exception e)
{
callbackHandler.OnError?.Invoke(e);
}
nextHandler.Result = result;
});
return(nextHandler);
}
public UseCaseHandler <TOutput> Execute(UseCaseHandler <TOutput> .OnCompleteCallback <TOutput> onComplete = null,
UseCaseHandler <TOutput> .OnErrorCallback onError = null,
UseCaseHandler <TOutput> .OnStartCallback onStart = null)
{
var handler = new UseCaseHandler <TOutput>()
{
OnComplete = onComplete,
OnError = onError,
OnStart = onStart
};
return(Execute(handler));
}