[TYPO3-ect] TS Action chains for SPL objects

[Steffen Kamper]

Hi Elmar,

"Elmar Hinz" <elmar07 at googlemail.com> schrieb im Newsbeitrag 
news:mailman.1.1186523178.7254.typo3-team-extension-coordination at lists.netfielders.de...
> Steffen Kamper wrote:
>
>>>
>>> defaultAction {
>>>  START = model
>>>  model = tx_bananas_models_board
>>>  model.do.1 = load
>>>  model.go.next = view
>>>  view = tx_bananas_views_list
>>>  view.do.1 = render
>>>  view.do.1.1 = listTemplate
>>>  view.go.next = translator
>>>  translator = tx_lib_translator
>>>  translator.1 = translateContent
>>>  translator.return = content
>>> }
>>>
>>> Well, there is stell an issue with the return syntax.
>>>
>>> Regards
>>>
>>> Elmar
>
> Hi Steffen,
>
> for Daniels new wiki documentation system:
>
>>
>> Ah I see. That's really interesting. You call it defaultAction, that
>> implicies that there are othere Actions possible.
>
> Every controller needs one "defaultAction". A simple list view doesn't 
> need
> more than this one action.
>
>> So does the TS replace the php-code or is it an alternative ?
>
> It's an alternative. The one end are plain PHP controllers, the other end 
> is
> a plain TS configuration. You can mix and merge as you need, you can do it
> all in plain PHP.
>
> The TS end is most interesting. Using standard classes of "lib" and
> of "lib__addon"-libraries, you will be able to confiugure complex
> extensions without touching PHP at all. That's similar to tranditional T3
> TS objects. Contrary to them in "lib" there are real objects and you can
> extend and customize them all without running into XCLASS conflicts.
>
> But the special strenght of lib are action chains, that will enable you to
> control complex forms and workflows on TS level, in combination with 
> smarty
> templates for example.
>
>> Also i don't see - how are parameters handled in TS ? Looks like you do 
>> it
>> in array, where does return values processed ?
>
> Return values are not used at all. That's the trick. And no variables are
> used as parameters. All can be written as literals. Very easy.
>
> The SPL objects contain all data in the internal array. (Additinally you 
> can
> (ab)use the controller as data storage register.)
>
> The SPL objects "eat" each other like fishes, to process the data:
>
> session > model > validation > session > view > translator
>
> The SPL object chain is the fundament of this TS action chain.
>
>> How does simple switch-case works with the TS ?
>
> They have to be implemented inside PHP objects. Each object returns result
> states. In most cases it's one state: "next". Validator objects or captcha
> objects return 2 states. You could call them "ok" and "ko" or "passed"
> and "failed".
>
> In the TS setup you assign the next SPL objects to this result states. 
> That
> is also the central technique that Struts uses on the controller
> level. "lib" transfers this technique to the level of each SPL object. I
> think there is more flexibility in this, but there isn't a big difference.
>
> Objects can return as many states as they like. That becomes interesting
> when you want to program a configurable business workflow.
>
>> Sorry for asking so lot, but i think the TS in general needs some more
>> functionality to work on such high level. In this case TS is used like a
>> programming language, and i wouldn't call TS a programming language 
>> (atm).
>
> No it's not a programming language. You still need to program PHP objects.
> But the success of TS, of mailformplus or of Struts teaches you, that it 
> is
> very successful, if you can easily (re)configure the interaction of that
> objects.
>
> Thank you for the interview.
>
> Regards
>
> Elmar
>
>

thanks for the detailed explanations, now i understand thae principle more 
better.
Surely this has to be experienced in practise, but for use understanding is 
the first important step.

So last question to this :-) As i understand right, the TS definition 
overwrite the php - what has to be done to get it work, or is there nothing 
to do (in php)? Does this work with e.g. bananas like in your examples ?

vg  Steffen