[TYPO3-dev] (solved, maybe) looking for a hook to use before rendering a backend page

[Ivano Luberti]

Even if I have not seen much interest on this issue I post my progresses 
anyway, maybe someone one day can find them useful

I have found a solution but I think is not the most proper one.
I'm working on TYPO3 6.1.7 and debugging step by step I have found in

\TYPO3\CMS\Backend\Controller\EditDocumentControler->makeEditForm

the following hook

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/alt_doc.php']['makeEditForm_accessCheck']


It works because for, some reason, the method fetches the record 2 
times: the first time before setting the value of hasAccess and the 
second time immediately after it has passed the test on hasAccess.

The values used to reneder the form are the ones in the second instance, 
so modifying the DB data in the meanwhile works.

I'm not fully satisfied with this solution because I fear one day 
someone recognize this can be optimized and instead of redoing a query in

\TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\Form\\DataPreprocessor->fetchRecord($table, 
$theUid, $cmd == 'new' ? 'new' : '');
								

decides to pass to fetchrecord the $calcPRec variable and mostly the 
name of the hook seems to say that it is not intended for record 
preprocessing but to possibly modify right access to a record.


Finally I note that

\TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Backend\\Form\\DataPreprocessor

seems not to have aby hook




--------------------------------

Hello all, I'm currently modifyng itypoexpiringfegroups to tightly 
integrate it with the TYPO3 group management so that the usergroup field 
reflects the content of itypoexpiringfegroups field. I'm planning to 
make the changes available if the actual maintainer agrees with my changes.

I have already been able to hook the process during frontend user logon 
and even to hack current extension javascript to modify values of 
usergroup field in the backend form when itypoexpiringfegroups is edited.

The last thing I want to achieve is that when the form to edit a user is 
called, before showing the values, I can hook the process to possibly 
modify the value of usergroup field taking into account expiration or 
starting validity of groups contained in itypoexpiringfegroups field.

I have already found

$TYPO3_CONF_VARS['SC_OPTIONS']['t3lib/class.t3lib_tceforms.php']['getSingleFieldClass']

but even if I can change value in the DB before showing them, I cannot 
update the $row['usergroup'] value. So backend user would see 
potentially expired values and save them back erroneously.

Does someone knows if exists a suitable hook for my needs?



-- 
==================================================
dott. Ivano Mario Luberti
Archimede Informatica societa' cooperativa a r. l.
Sede Operativa
Via Gereschi 36 - 56126- Pisa
tel.: +39-050- 580959
tel/fax: +39-050-9711344
web: www.archicoop.it
==================================================