Merge pull request mongodb#18 from divine/pr/17

Get database from dsn

src/Jenssegers/Mongodb/Connection.php

@@ -38,7 +38,7 @@ public function __construct(array $config)
  $this->connection = $this->createConnection($dsn, $config, $options);
 
  // Select database
- $this->db = $this->connection->selectDatabase($config['database']);
+ $this->db = $this->connection->selectDatabase($this->getDatabaseDsn($dsn, $config['database']));
 
  $this->useDefaultPostProcessor();
 
@@ -188,10 +188,21 @@ protected function getHostDsn(array $config)
 
  // Check if we want to authenticate against a specific database.
  $auth_database = isset($config['options']) && !empty($config['options']['database']) ? $config['options']['database'] : null;
-
  return 'mongodb://' . implode(',', $hosts) . ($auth_database ? '/' . $auth_database : '');
  }
 
+ /**
+ * Get database name from DSN string, if there is no database in DSN path - returns back $database argument.
+ * @param string $dsn
+ * @param $database
+ * @return string
+ */
+ protected function getDatabaseDsn($dsn, $database)
+ {
+ $dsnDatabase = trim(parse_url($dsn, PHP_URL_PATH), '/');
+ return trim($dsnDatabase) ? $dsnDatabase : $database;
+ }
+
  /**
  * Create a DSN string from a configuration.
  * @param array $config