/**
* Build DSN connection string for DB driver instantiate process
*
* @param string Group name
* @return string DSN Connection string
*/
public function set_dsn($group = 'default')
{
if (!isset($this->config[$group])) {
throw new InvalidArgumentException('Group ' . $group . ' not exists');
}
self::$dbdriver = $this->config[$group]['dbdriver'];
if (isset($this->config[$group]['subdriver'])) {
self::$subdriver = $this->config[$group]['subdriver'];
}
$params = array('dbprefix' => '', 'pconnect' => FALSE, 'db_debug' => FALSE, 'cache_on' => FALSE, 'cachedir' => '', 'char_set' => 'utf8', 'dbcollat' => 'utf8_general_ci', 'swap_pre' => '', 'stricton' => FALSE);
$config = array_merge($this->config[$group], $params);
$dsnstring = empty($config['dsn']) ? FALSE : $config['dsn'];
$subdriver = empty($config['subdriver']) ? FALSE : $config['subdriver'];
$failover = empty($config['failover']) ? FALSE : $config['failover'];
$dsn = $config['dbdriver'] . '://' . $config['username'] . ':' . $config['password'] . '@' . $config['hostname'] . '/' . $config['database'];
// Build the parameter
$other_params = array_slice($config, 6);
if ($dsnstring) {
$other_params['dsn'] = $dsnstring;
}
if ($subdriver) {
$other_params['subdriver'] = $subdriver;
}
if ($failover) {
$other_params['failover'] = $failover;
}
return $dsn . '?' . http_build_query($other_params);
}
