ADR - Middleware - CQRS/event sourcing

[devosc]

I'm re-posting this here because it is the type of solution that I think can work for everyone and would work with existing code.

What I would like the ADR pattern to provide is a traversable set of callable types. During its traversal the ADR handler will determine what the next callable to use is and will return it so that the generator can either call it or create it and then call it. This would also allow callables to be skipped or jump to a different point in the queue depending on its state?

'controller' => new ControllerAction([
        function(array $args = []) {
            return new Model(null, ['args' => $args]); //$args are the named args
        },
        function(Model $model) {
            $model['__CONTROLLER__'] = __FUNCTION__; //demo check that is called..
            return $model;
        },
        function(Model $model, Response $response) {
            $model[$model::TEMPLATE] = 'home';

            return $model;

            //or
            $response->setContent($response);
            return $response; 
        },
]),

If one of the functions returns a Response the traversal is stopped

References:
Matthias' CQRS/event sourcing
Traversable Event