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<?php |
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/** |
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* Query |
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* |
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* Free Query Builder / Database Abstraction Layer |
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* |
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* @package Query |
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* @author Timothy J. Warren |
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* @copyright Copyright (c) 2012 - 2015 |
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* @link https://github.com/aviat4ion/Query |
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* @license http://philsturgeon.co.uk/code/dbad-license |
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*/ |
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// -------------------------------------------------------------------------- |
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namespace Query; |
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/** |
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* Connection manager class to manage connections for the |
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* Query method |
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* |
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* @package Query |
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* @subpackage Core |
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*/ |
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final class ConnectionManager { |
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/** |
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* Map of named database connections |
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* @var array |
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*/ |
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private $connections = []; |
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/** |
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* Class instance variable |
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* @var ConnectionManager |
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*/ |
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private static $instance = NULL; |
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// -------------------------------------------------------------------------- |
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/** |
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* Private constructor to prevent multiple instances |
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* @codeCoverageIgnore |
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*/ |
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private function __construct() |
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{ |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Private clone method to prevent cloning |
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* @throws \DomainException |
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*/ |
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public function __clone() |
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{ |
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throw new \DomainException("Can't clone singleton"); |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Prevent serialization of this object |
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* @throws \DomainException |
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*/ |
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public function __sleep() |
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{ |
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throw new \DomainException("No serializing of singleton"); |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Make sure serialize/deserialize doesn't work |
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* @throws \DomainException |
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*/ |
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public function __wakeup() |
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{ |
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throw new \DomainException("Can't unserialize singleton"); |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Return a connection manager instance |
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* |
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* @staticvar null $instance |
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* @return ConnectionManager |
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*/ |
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public static function get_instance() |
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{ |
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if (self::$instance === NULL) |
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{ |
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self::$instance = new self(); |
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} |
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return self::$instance; |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Returns the connection specified by the name given |
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* |
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* @param string|array|object $name |
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* @return QueryBuilder |
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* @throws \InvalidArgumentException |
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*/ |
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public function get_connection($name = '') |
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{ |
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// If the parameter is a string, use it as an array index |
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if (is_scalar($name) && isset($this->connections[$name])) |
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{ |
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return $this->connections[$name]; |
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} |
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elseif (empty($name) && ! empty($this->connections)) // Otherwise, return the last one |
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{ |
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return end($this->connections); |
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} |
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// You should actually connect before trying to get a connection... |
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throw new \InvalidArgumentException("The specified connection does not exist"); |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Parse the passed parameters and return a connection |
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* |
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* @param \stdClass $params |
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* @return QueryBuilder |
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*/ |
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public function connect(\stdClass $params) |
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{ |
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list($dsn, $dbtype, $params, $options) = $this->parse_params($params); |
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$dbtype = ucfirst($dbtype); |
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$driver = "\\Query\\Drivers\\{$dbtype}\\Driver"; |
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// Create the database connection |
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$db = ( ! empty($params->user)) |
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? new $driver($dsn, $params->user, $params->pass, $options) |
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: new $driver($dsn, '', '', $options); |
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// Set the table prefix, if it exists |
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if (isset($params->prefix)) |
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{ |
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$db->set_table_prefix($params->prefix); |
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} |
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// Create Query Builder object |
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$conn = new QueryBuilder($db, new QueryParser($db)); |
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// Save it for later |
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if (isset($params->alias)) |
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{ |
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$this->connections[$params->alias] = $conn; |
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} |
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else |
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{ |
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$this->connections[] = $conn; |
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} |
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return $conn; |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Parses params into a dsn and option array |
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* |
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* @param \stdClass $params |
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* @return array |
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* @throws BadDBDriverException |
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*/ |
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public function parse_params(\stdClass $params) |
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{ |
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$params->type = strtolower($params->type); |
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$dbtype = ($params->type !== 'postgresql') ? $params->type : 'pgsql'; |
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$dbtype = ucfirst($dbtype); |
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// Make sure the class exists |
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if ( ! class_exists("\\Query\\Drivers\\{$dbtype}\\Driver")) |
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{ |
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throw new BadDBDriverException('Database driver does not exist, or is not supported'); |
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} |
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// Set additional PDO options |
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$options = []; |
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if (isset($params->options)) |
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{ |
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$options = (array) $params->options; |
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} |
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// Create the dsn for the database to connect to |
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if (strtolower($dbtype) === 'firebird') |
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{ |
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$dsn = "{$params->host}:{$params->file}"; |
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} |
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else if(strtolower($dbtype) === 'sqlite') |
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{ |
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$dsn = $params->file; |
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} |
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else if(strtolower($dbtype) === 'oci') |
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{ |
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$dsn = "dbname=//{$params->host}:{$params->port}/{$params->database}"; |
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} |
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else |
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{ |
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$dsn = $this->create_dsn($dbtype, $params); |
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} |
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return [$dsn, $dbtype, $params, $options]; |
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} |
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// -------------------------------------------------------------------------- |
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/** |
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* Create the dsn from the db type and params |
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* |
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* @param string $dbtype |
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* @param \stdClass $params |
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* @return string |
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*/ |
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private function create_dsn($dbtype, \stdClass $params) |
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{ |
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if (strtolower($dbtype) === 'pdo_firebird') |
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{ |
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$dbtype = 'firebird'; |
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} |
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$pairs = []; |
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if ( ! empty($params->database)) |
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{ |
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$pairs[] = implode('=', ['dbname', $params->database]); |
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} |
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$skip = [ |
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'name' => 'name', |
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'pass' => 'pass', |
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'user' => 'user', |
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'type' => 'type', |
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'prefix' => 'prefix', |
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'options' => 'options', |
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'database' => 'database', |
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'alias' => 'alias' |
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]; |
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foreach($params as $key => $val) |
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{ |
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if (( ! array_key_exists($key, $skip)) && ( ! empty($val))) |
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{ |
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$pairs[] = implode('=', [$key, $val]); |
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} |
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} |
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return strtolower($dbtype) . ':' . implode(';', $pairs); |
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} |
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} |
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// End of connection_manager.php |
aviat4ion /
Query
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