[TYPO3-ect] TS Action chains for SPL objects

[Elmar Hinz]

Hello,

it's a while ago, that we had an big thread about the possibility to specify
action chains by TS. Either the solutions where limited or complex. I want
to make a next attemt for such a design.

Instead of placing the object into a numbered order, each object has a
pointer to the next object. You overwrite pointers, to place new objects
into the chain. But the mayor reason for this model is, that a linear chain
of objects doesn't cover all needs. Think of the cases of validation where
a different processing is required if validation fails. 

Don't be shocked. The example runs validation and a captcha. It't probably
one of the longest that is possible. Other actions are comparingly simple.

You discover a numberd order for function calls on objects and for
parameters of functions.

actions {

 ...

editAction {
 ...
}

submitAction {
 START = sessionLoad
 sessionLoad = tx_my_sessionClass
 sessionLoad.do.1 = loadFromSession
 sessionLoad.go.next = request
 request = tx_my_requestClass
 request.do.1 = mergeParameters
 request.go.next = validation
 validation = tx_my validationClass
 validation.set.configurations < temp.validatorConfigurations
 validation.do.1 = validate
 validation.go.invalid = editAction
 validation.go.valid = captcha
 captcha = tx_my_captchaClass
 captcha.do.1.run
 captcha.go.display= render
 captcha.go.passed = transform
 render = tx_my_engineClass
 render.do.1 = render
 render.do.1.1 = captchaTemplate
 render.go.next = translate
 translate = tx_my_translatorClass
 translate.do.1.translate
 translate.do.1.1 = content
 translate.next.sessionStore
 sessionStore = tx_my_sessionClass
 sessionStore.do.1 = loadToSession
 sessionStore.go.next = RETURN content
 transform = tx_my_updateTransformer
 transform.next = update
 update = tx_my_modelClass
 update.do.1.update
 update.go.next = redirect
 redirect = tx_my_redirectorClass
 redirect.do.1 = redirect
 redirect.do.1.1 = listAction
}

 ...
}

We later could add general entry and exit hooks to tx_lib_object, so that
each still more flexibility can be added.


Regards

Elmar