/**
* Plugin activation hook
*
* Creates tables if needed
*
* @return void
*/
public function on_activate()
{
global $wpdb;
require_once ABSPATH . 'wp-admin/includes/upgrade.php';
$charset_collate = $wpdb->get_charset_collate();
$dbstruct = array();
$dbstruct[] = \WP_Clanwars\Games::schema();
$dbstruct[] = \WP_Clanwars\Maps::schema();
$dbstruct[] = \WP_Clanwars\Matches::schema();
$dbstruct[] = \WP_Clanwars\Rounds::schema();
$dbstruct[] = \WP_Clanwars\Teams::schema();
add_option(WP_CLANWARS_CATEGORY, -1);
add_option(WP_CLANWARS_DEFAULTCSS, true);
$dbstruct = implode("\n", $dbstruct);
// update database
dbDelta($dbstruct);
}