[TYPO3-core] 0001963: tslib_pibase: incorporate the fh_library

[Holzinger Franz]

Hello,

I have created a diff file at
http://bugs.typo3.org/view.php?id=1963
to get 2 new functions and 1 interface. These are needed by all extensions.
All functions have already been used from the fh_library by tt_products 
and one function in sr_feuser_register.

pi_getSetupOrFFvalue is needed to get either the CODE field or the  
display mode of the flexform, however it can used generally for all kind 
of TypoScript settings which have a duplicate in flexforms. This 
function prefers the flexforms if activated and otherwise uses 
configuration from the TypoScript setup.

pi_displayHelpPage is needed to display a help page, e.g. if an error 
occurs. In future this method can be extended and every extension would 
profit from this.

$pi_errorMessage is a new member variable. The extension programmer 
shall store here any error messages that need to be displayed to the 
frontend user. Of course, a better error system should be implemented 
one day.

function pi_sortCodes($codes) is only an interface. With this it is 
accomplished that all extensions will look similar. This shall be 
overwritten, because generally there needs to be an order in which the 
CODEs should be treated. E.g. in tt_products the OVERVIEW cannot be 
displayed before the BASKET view. Otherwise the user can put something 
into the basket, but the mini basket is always one step behind. This 
method is necessary for all extensions who accept more than one CODE 
(display mode) at a time.

Regards,

Franz