/**
* Load dataset definitions from the database if necessary.
*
* @return an array of all available datasets
**/
function &wdGetDataSets() {
static $datasets, $wgGroupPermissions;
if ( empty( $datasets ) ) {
// Load defs from the DB
$dbs = wfGetDB( DB_SLAVE );
$res = $dbs->select( 'wikidata_sets', array( 'set_prefix' ) );
while ( $row = $dbs->fetchObject( $res ) ) {
$dc = new DataSet();
$dc->setPrefix( $row->set_prefix );
if ( $dc->isValidPrefix() ) {
$datasets[$row->set_prefix] = $dc;
wfDebug( "Imported data set: " . $dc->fetchName() . "\n" );
} else {
wfDebug( $row->set_prefix . " does not appear to be a valid dataset!\n" );
}
}
}
return $datasets;
}
