function execute($par)
{
global $wgRequest, $wgOut, $wgUser;
$this->cat_stack = new MsCategoryStack($wgRequest->getArray('ms-cat'));
$chosen_db = $wgRequest->getText('ms-db', false);
if ($chosen_db) {
// there's an "ms-db" argument present. So redirect directly
// to that db.
$db = new MsDatabase($chosen_db);
$subtitle = $db->is_driver_type('proxydriver') ? 'proxy' : 'query';
$wgOut->redirect($this->special_page->get_sub_title($subtitle)->getLocalUrl($this->cat_stack->build_query('ms-cat') . '&' . $db->build_query('ms-db')));
return;
}
if ($this->cat_stack->get_top()->has_sub_categories()) {
// display category chooser
$this->display_cat_chooser();
} else {
// no more categories to choose of.
// Check what we've got for databases:
$dbs = $this->cat_stack->get_top()->get_databases(MsCategory::AS_OBJECTS);
// das ist nicht mehr umbedingt schlimm -- wird
// halt nix angezeigt in dem dbchooser.
/*
if(empty($dbs)) {
throw new MsException("Top cat of {$this->cat_stack} has no databases attached!",
MsException::BAD_CONFIGURATION);
}
*/
if (count($dbs) > 1) {
// the cat has more than one database
if (MsDatabase::are_query_databases($dbs)) {
// but they are all Query Databases, so
// let MsQueryPage do it's job
$this->redirect('query');
return;
} else {
// Since we cannot merge different databases on
// one page, display a database chooser.
$template = new MsChooserTemplate();
$this->display_cat_chooser($template);
}
} else {
// Only one database in this cat.
// Relaxed situation :-)
// Since 04.07: test to display a chooser... too ;-)
/*
$db = $dbs[0];
$this->redirect_to_db($db);
$subtitle = $db->is_driver_type('proxydriver') ? 'proxy' : 'query';
$this->redirect( $subtitle );
*/
$this->display_cat_chooser();
}
}
// if ...->has_sub_categories()
}
