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<?php |
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namespace Darya\Database; |
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use Darya\Database\Connection; |
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use UnexpectedValueException; |
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/** |
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* Darya's database connection factory. |
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* |
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* @author Chris Andrew <[email protected]> |
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*/ |
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class Factory { |
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/** |
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* The class name or database type name to use by default |
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* |
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* @var string |
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*/ |
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protected $default = 'mysql'; |
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/** |
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* A map of database type names to connection implementation classes |
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* |
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* @var array |
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*/ |
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protected $map = array( |
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'mysql' => 'Darya\Database\Connection\MySql', |
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'mssql' => 'Darya\Database\Connection\SqlServer', |
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'sqlserver' => 'Darya\Database\Connection\SqlServer', |
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); |
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/** |
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* Instantiate a new database factory. |
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* |
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* @param string $default |
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*/ |
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public function __construct($default = null) { |
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$this->default = $default ?: $this->default; |
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} |
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/** |
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* Prepare an options array by ensuring the existence of expected keys. |
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* |
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* @param array $options |
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* @return array |
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*/ |
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protected function prepareOptions(array $options) { |
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return array_merge(array( |
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'hostname' => 'localhost', |
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'username' => null, |
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'password' => null, |
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'database' => null, |
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'port' => null |
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), $options); |
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} |
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/** |
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* Resolve a class name from the given string. |
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* |
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* @param string $string |
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* @return string |
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*/ |
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protected function resolveClass($string) { |
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if (class_exists($string)) { |
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return $string; |
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} |
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if (!isset($this->map[$string])) { |
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return null; |
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} |
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return $this->map[$string]; |
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} |
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/** |
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* Create a new database connection using the given name/class and options. |
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* |
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* @param class|string $name |
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* @param array $options Expects keys 'hostname', 'username', 'password', |
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* 'database' and optionally 'port' |
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* @return Connection |
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*/ |
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public function create($name = null, array $options = array()) { |
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$name = $name ?: $this->default; |
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$class = $this->resolveClass($name); |
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$options = $this->prepareOptions($options); |
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if (!class_exists($class) || !is_subclass_of($class, 'Darya\Database\Connection')) { |
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throw new UnexpectedValueException("Couldn't resolve a valid database connection instance for type '$name'"); |
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} |
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return new $class( |
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$options['hostname'], |
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$options['username'], |
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$options['password'], |
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$options['database'], |
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$options['port'] |
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); |
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} |
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} |
darya /
framework
