Method register

/**
 * Registers the service provider with a DI container.
 *
 * @param   Container  $container  The DI container.
 *
 * @return  void
 *
 * @since   4.0.0
 */
public function register(Container $container)
{
    $container->alias('db', DatabaseInterface::class)->alias('DatabaseDriver', DatabaseInterface::class)->alias(DatabaseDriver::class, DatabaseInterface::class)->share(DatabaseInterface::class, function (Container $container) {
        $conf = $container->get('config');
        /**
         * @todo: This 'sensible' default is required in the installer for now. Eventually we need to
         *        refactor the installer so it is not required
         */
        $dbtype = $conf->get('dbtype', 'mysqli');
        /*
         * In Joomla! 3.x and earlier the `mysql` type was used for the `ext/mysql` PHP extension, which is no longer supported.
         * The `pdomysql` type represented the PDO MySQL adapter.  With the Framework's package in use, the PDO MySQL adapter
         * is now the `mysql` type.  Therefore, we check two conditions:
         *
         * 1) Is the type `pdomysql`, if so switch to `mysql`
         * 2) Is the type `mysql`, if so make sure PDO MySQL is supported and if not switch to `mysqli`
         *
         * For these cases, if a connection cannot be made with MySQLi, the database API will handle throwing an Exception
         * so we don't need to make any additional checks for MySQLi.
         */
        if (strtolower($dbtype) === 'pdomysql') {
            $dbtype = 'mysql';
        }
        if (strtolower($dbtype) === 'mysql') {
            if (!MysqlDriver::isSupported()) {
                $dbtype = 'mysqli';
            }
        }
        /*
         * Joomla! 4.0 removes support for the `ext/pgsql` PHP extension.  To help with the migration, we will migrate the configuration
         * to the PDO PostgreSQL driver regardless of if the environment supports it.  Instead of getting a "driver not found" type of
         * error, this will instead force the API to report that the driver is not supported.
         */
        if (strtolower($dbtype) === 'postgresql') {
            $dbtype = 'pgsql';
        }
        $options = ['driver' => $dbtype, 'host' => $conf->get('host'), 'user' => $conf->get('user'), 'password' => $conf->get('password'), 'database' => $conf->get('db'), 'prefix' => $conf->get('dbprefix')];
        if ((int) $conf->get('dbencryption') !== 0) {
            $options['ssl'] = ['enable' => true, 'verify_server_cert' => (bool) $conf->get('dbsslverifyservercert')];
            foreach (['cipher', 'ca', 'key', 'cert'] as $value) {
                $confVal = trim($conf->get('dbssl' . $value, ''));
                if ($confVal !== '') {
                    $options['ssl'][$value] = $confVal;
                }
            }
        }
        // Enable utf8mb4 connections for mysql adapters
        if (strtolower($dbtype) === 'mysqli') {
            $options['utf8mb4'] = true;
        }
        if (strtolower($dbtype) === 'mysql') {
            $options['charset'] = 'utf8mb4';
        }
        if (JDEBUG) {
            $options['monitor'] = new \Joomla\Database\Monitor\DebugMonitor();
        }
        try {
            $db = DatabaseDriver::getInstance($options);
        } catch (\RuntimeException $e) {
            if (!headers_sent()) {
                header('HTTP/1.1 500 Internal Server Error');
            }
            jexit('Database Error: ' . $e->getMessage());
        }
        $db->setDispatcher($container->get(DispatcherInterface::class));
        return $db;
    }, true);
}