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<?php |
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/* |
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* This file is part of Yolk - Gamer Network's PHP Framework. |
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* |
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* Copyright (c) 2014 Gamer Network Ltd. |
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* |
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* Distributed under the MIT License, a copy of which is available in the |
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* LICENSE file that was bundled with this package, or online at: |
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* https://github.com/gamernetwork/yolk-database |
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*/ |
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namespace yolk\database; |
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use yolk\contracts\database\DatabaseConnection; |
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use yolk\contracts\database\ConnectionManager; |
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use yolk\database\exceptions\DatabaseException; |
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use yolk\database\exceptions\ConfigurationException; |
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class GenericConnectionManager implements ConnectionManager { |
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/** |
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* Array of database connections |
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* @var [] |
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*/ |
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protected $connections = []; |
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/** |
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* Name of the default connection. |
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* @var string |
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*/ |
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protected $default = ''; |
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public function add( $name, $connection ) { |
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$this->checkName($name); |
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if( $connection instanceof DatabaseConnection ) |
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$this->connections[$name] = $connection; |
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else |
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$this->connections[$name] = $this->create($connection); |
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// no default connection so use the first one |
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if( !$this->default ) |
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$this->default = $name; |
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return $this->connections[$name]; |
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} |
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public function remove( $name ) { |
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unset($this->connections[$name]); |
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return $this; |
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} |
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public function get( $name ) { |
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return isset($this->connections[$name]) ? $this->connections[$name] : null; |
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} |
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public function has( $name ) { |
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return isset($this->connections[$name]); |
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} |
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public function getDefault() { |
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return $this->connections[$this->default]; |
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} |
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public function setDefault( $name ) { |
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if( !isset($this->connections[$name]) ) |
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throw new \InvalidArgumentException("Unknown Connection: {$name}"); |
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$this->default = $name; |
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return $this; |
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} |
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/** |
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* Create a suitable implementation of DatabaseConnection based on the specified DSN. |
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* @param mixed $dsn |
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* @return DatabaseConnection |
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*/ |
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protected function create( $dsn ) { |
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$dsn = $this->validateDSN($dsn); |
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$factories = [ |
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DSN::TYPE_MYSQL => 'createMySQL', |
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DSN::TYPE_PGSQL => 'createPgSQL', |
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DSN::TYPE_SQLITE => 'createSQLite', |
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]; |
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if( !isset($factories[$dsn->type]) ) |
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throw new ConfigurationException('Invalid database type: '. $dsn->type); |
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$factory = $factories[$dsn->type]; |
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return $this->$factory($dsn); |
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} |
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/** |
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* Ensure we have a valid DSN instance. |
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* @param mixed $dsn a string, array or DSN instance |
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* @return DSN |
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*/ |
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protected function validateDSN( $dsn ) { |
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if( $dsn instanceof DSN ) |
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return $dsn; |
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elseif( is_string($dsn) ) |
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return DSN::fromString($dsn); |
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elseif( is_array($dsn) ) |
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return new DSN($dsn); |
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else |
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throw new ConfigurationException('Invalid DSN: '. $dsn); |
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} |
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/** |
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* Create a MySQL connection. |
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* @param DSN $dsn |
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* @return adapters\MySQLConnection |
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*/ |
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protected function createMySQL( DSN $dsn ) { |
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return new adapters\MySQLConnection($dsn); |
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} |
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/** |
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* Create a PgSQL connection. |
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* @param DSN $dsn |
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* @return adapters\PgSQLConnection |
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*/ |
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protected function createPgSQL( DSN $dsn ) { |
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return new adapters\PgSQLConnection($dsn); |
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} |
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/** |
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* Create a SQLite connection. |
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* @param DSN $dsn |
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* @return adapters\SQLiteConnection |
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*/ |
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protected function createSQLite( DSN $dsn ) { |
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return new adapters\SQLiteConnection($dsn); |
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} |
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/** |
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* Ensure we have a valid connection name, i.e. it's not empty and doesn't already exist. |
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* @param string $name |
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* @return void |
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*/ |
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protected function checkName( $name ) { |
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if( !$name ) |
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throw new DatabaseException('Managed database connections must have a name'); |
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if( $this->has($name) ) |
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throw new DatabaseException('Connection already exists with name: '. $name); |
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} |
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} |
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// EOF |
gamernetwork /
yolk-database
