Habari\InstallHandler::install_db PHP Метод

    private function install_db()
    {
        $db_host = $this->handler_vars['db_host'];
        $db_type = $this->handler_vars['db_type'];
        $db_schema = $this->handler_vars['db_schema'];
        $db_user = $this->handler_vars['db_user'];
        $db_pass = $this->handler_vars['db_pass'];
        switch ($db_type) {
            case 'mysql':
            case 'pgsql':
                // MySQL & PostgreSQL requires specific connection information
                if (empty($db_user)) {
                    $this->theme->assign('form_errors', array("{$db_type}_db_user" => _t('User is required.')));
                    return false;
                }
                if (empty($db_schema)) {
                    $this->theme->assign('form_errors', array("{$db_type}_db_schema" => _t('Name for database is required.')));
                    return false;
                }
                if (empty($db_host)) {
                    $this->theme->assign('form_errors', array("{$db_type}_db_host" => _t('Host is required.')));
                    return false;
                }
                break;
            case 'sqlite':
                // If this is a SQLite database, let's check that the file
                // exists and that we can access it.
                if (!$this->check_sqlite()) {
                    return false;
                }
                break;
        }
        if (isset($this->handler_vars['table_prefix'])) {
            // store prefix in the Config singleton so DatabaseConnection can access it
            Config::set('db_connection', array('prefix' => $this->handler_vars['table_prefix']));
        }
        if (!$this->connect_to_existing_db()) {
            $this->theme->assign('form_errors', array("{$db_type}_db_user" => _t('Problem connecting to supplied database credentials')));
            return false;
        }
        DB::begin_transaction();
        /* Let's install the DB tables now. */
        $create_table_queries = $this->get_create_table_queries($this->handler_vars['db_type'], $this->handler_vars['table_prefix'], $this->handler_vars['db_schema']);
        DB::clear_errors();
        DB::dbdelta($create_table_queries, true, true, true);
        if (DB::has_errors()) {
            $error = DB::get_last_error();
            $this->theme->assign('form_errors', array('db_host' => _t('Could not create schema tables… %s', array($error['message']))));
            DB::rollback();
            return false;
        }
        // Cool.  DB installed. Create the default options
        // but check first, to make sure
        if (!Options::get('installed')) {
            if (!$this->create_default_options()) {
                $this->theme->assign('form_errors', array('options' => _t('Problem creating default options')));
                DB::rollback();
                return false;
            }
        }
        // Create the Tags vocabulary
        if (!$this->create_tags_vocabulary()) {
            $this->theme->assign('form_errors', array('options' => _t('Problem creating tags vocabulary')));
            DB::rollback();
            return false;
        }
        // Create the standard post types and statuses
        if (!$this->create_base_post_types()) {
            $this->theme->assign('form_errors', array('options' => _t('Problem creating base post types')));
            DB::rollback();
            return false;
        }
        if (!$this->create_base_comment_types()) {
            $this->theme->assign('form_errors', array('options' => _t('Problem creating base comment types and statuses')));
            DB::rollback();
            return false;
        }
        // Let's setup the admin user and group now.
        // But first, let's make sure that no users exist
        $all_users = Users::get_all();
        if (count($all_users) < 1) {
            $user = $this->create_admin_user();
            if (!$user) {
                $this->theme->assign('form_errors', array('admin_user' => _t('Problem creating admin user.')));
                DB::rollback();
                return false;
            }
            $admin_group = $this->create_admin_group($user);
            if (!$admin_group) {
                $this->theme->assign('form_errors', array('admin_user' => _t('Problem creating admin group.')));
                DB::rollback();
                return false;
            }
            // create default tokens
            ACL::rebuild_permissions($user);
        }
        // create a first post, if none exists
        if (!Posts::get(array('count' => 1))) {
            if (!$this->create_first_post()) {
                $this->theme->assign('form_errors', array('post' => _t('Problem creating first post.')));
                DB::rollback();
                return false;
            }
        }
        /* Post::save_tags() closes transaction, until we fix that, check and reconnect if needed */
        if (!DB::in_transaction()) {
            DB::begin_transaction();
        }
        /* Store current DB version so we don't immediately run dbdelta. */
        Version::save_dbversion();
        /* Ready to roll. */
        DB::commit();
        return true;
    }