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<?php
namespace Illuminate\Database\Connectors;
use PDO;
use Illuminate\Support\Arr;
class SqlServerConnector extends Connector implements ConnectorInterface
{
/**
* The PDO connection options.
*
* @var array
*/
protected $options = [
PDO::ATTR_CASE => PDO::CASE_NATURAL,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
PDO::ATTR_STRINGIFY_FETCHES => false,
];
/**
* Establish a database connection.
*
* @param array $config
* @return \PDO
*/
public function connect(array $config)
{
$options = $this->getOptions($config);
return $this->createConnection($this->getDsn($config), $config, $options);
}
/**
* Create a DSN string from a configuration.
*
* @param array $config
* @return string
*/
protected function getDsn(array $config)
{
// First we will create the basic DSN setup as well as the port if it is in
// in the configuration options. This will give us the basic DSN we will
// need to establish the PDO connections and return them back for use.
if (in_array('dblib', $this->getAvailableDrivers())) {
return $this->getDblibDsn($config);
} elseif ($this->prefersOdbc($config)) {
return $this->getOdbcDsn($config);
} else {
return $this->getSqlSrvDsn($config);
}
}
/**
* Get the DSN string for a DbLib connection.
*
* @param array $config
* @return string
*/
protected function getDblibDsn(array $config)
{
$arguments = [
'host' => $this->buildHostString($config, ':'),
'dbname' => $config['database'],
];
$arguments = array_merge(
$arguments, Arr::only($config, ['appname', 'charset'])
);
return $this->buildConnectString('dblib', $arguments);
}
/**
* Determine if the database configuration prefers ODBC.
*
* @param array $config
* @return bool
*/
protected function prefersOdbc(array $config)
{
return in_array('odbc', $this->getAvailableDrivers()) &&
array_get($config, 'odbc') === true;
}
/**
* Get the DSN string for an ODBC connection.
*
* @param array $config
* @return string
*/
protected function getOdbcDsn(array $config)
{
if (isset($config['odbc_datasource_name'])) {
return 'odbc:'.$config['odbc_datasource_name'];
}
return '';
}
/**
* Get the DSN string for a SqlSrv connection.
*
* @param array $config
* @return string
*/
protected function getSqlSrvDsn(array $config)
{
$arguments = [
'Server' => $this->buildHostString($config, ','),
];
if (isset($config['database'])) {
$arguments['Database'] = $config['database'];
}
if (isset($config['appname'])) {
$arguments['APP'] = $config['appname'];
}
if (isset($config['readonly'])) {
$arguments['ApplicationIntent'] = 'ReadOnly';
}
if (isset($config['pooling']) && $config['pooling'] === false) {
$arguments['ConnectionPooling'] = '0';
}
return $this->buildConnectString('sqlsrv', $arguments);
}
/**
* Build a connection string from the given arguments.
*
* @param string $driver
* @param array $arguments
* @return string
*/
protected function buildConnectString($driver, array $arguments)
{
$options = array_map(function ($key) use ($arguments) {
return sprintf('%s=%s', $key, $arguments[$key]);
}, array_keys($arguments));
return $driver.':'.implode(';', $options);
}
/**
* Build a host string from the given configuration.
*
* @param array $config
* @param string $separator
* @return string
*/
protected function buildHostString(array $config, $separator)
{
if (isset($config['port'])) {
return $config['host'].$separator.$config['port'];
} else {
return $config['host'];
}
}
/**
* Get the available PDO drivers.
*
* @return array
*/
protected function getAvailableDrivers()
{
return PDO::getAvailableDrivers();
}
}