[TYPO3-shop] Language implementation in tt_products

[Simon Tuck]

Hi Franz,
> oh  :-o
:D
> What do you exactly mean with T3 localization? What does not work?
What I am missing is:
- Features such as config.sys_language_overlay (for example 'hideNonTranslated') and config.sys_language_mode (for example 'content_fallback') 
which are part of the internal framework for localization.
- Forward compatibility with future T3 language features.
- The BE localization view (in list mode select 'Localization view'). This feature shows me which records are translated and when I create a new 
translation it copies values from the default (depending on your configuration. It's debatable whether automatic copying is desirable). It has 
additional features, such as showing me when the default record has been modified and the translated record has not.

What I mean by "doesn't work" is that above features are not available if you use a separate table for translated records. Languages work of 
course, but it'd be nice to cover the points listed.

> 
> Which additional fields do you need for this?
> I can add a TypoScript Setup variable to switch between 2 modes of
> multiple language.
That works for me - you could even set this in the extension configuration when the ext is installed. Then the developer could decide which 
method to use and the ext. is backwards compatible.
The additonal fields are the fields that are added by the kickstarter when you select the option 'Enabled localization features' for a table. 
They are:
sys_language_uid int(11) DEFAULT '0' NOT NULL,
l18n_parent int(11) DEFAULT '0' NOT NULL,
l18n_diffsource mediumblob NOT NULL,
The option also adds TCA ctrl values:
$TCA['tt_products']['ctrl']['languageField'] = 'sys_language_uid';
$TCA['tt_products']['ctrl']['transOrigPointerField'] = 'l18n_parent';
$TCA['tt_products']['ctrl']['transOrigDiffSourceField'] = 'l18n_diffsource';
And as mentioned in a previous post, you can control which fields are available for translated records using 'exclude', e.g. 
$TCA['tt_products']['columns']['itemnumber']['l10n_mode'] = 'exclude';

Cheers,
Simon