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<?php |
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/** |
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* @package WPEmerge |
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* @author Atanas Angelov <[email protected]> |
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* @copyright 2018 Atanas Angelov |
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* @license https://www.gnu.org/licenses/gpl-2.0.html GPL-2.0 |
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* @link https://wpemerge.com/ |
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*/ |
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namespace WPEmerge\Helpers; |
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use Closure; |
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use WPEmerge\Application\InjectionFactory; |
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use WPEmerge\Exceptions\ClassNotFoundException; |
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use WPEmerge\Exceptions\ConfigurationException; |
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/** |
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* Represent a generic handler - a Closure or a class method to be resolved from the service container |
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*/ |
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class Handler { |
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/** |
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* Injection Factory. |
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* |
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* @var InjectionFactory |
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*/ |
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protected $injection_factory = null; |
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/** |
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* Parsed handler |
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* |
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* @var array|Closure|null |
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*/ |
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protected $handler = null; |
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/** |
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* Constructor |
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* |
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* @param InjectionFactory $injection_factory |
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* @param string|Closure $raw_handler |
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* @param string $default_method |
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* @param string $namespace |
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*/ |
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public function __construct( InjectionFactory $injection_factory, $raw_handler, $default_method = '', $namespace = '' ) { |
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$this->injection_factory = $injection_factory; |
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$handler = $this->parse( $raw_handler, $default_method, $namespace ); |
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if ( $handler === null ) { |
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throw new ConfigurationException( 'No or invalid handler provided.' ); |
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} |
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$this->handler = $handler; |
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} |
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/** |
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* Parse a raw handler to a Closure or a [class, method] array |
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* |
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* @param string|Closure $raw_handler |
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* @param string $default_method |
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* @param string $namespace |
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* @return array|Closure|null |
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*/ |
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protected function parse( $raw_handler, $default_method, $namespace ) { |
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if ( $raw_handler instanceof Closure ) { |
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return $raw_handler; |
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} |
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return $this->parseFromString( $raw_handler, $default_method, $namespace ); |
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} |
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/** |
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* Parse a raw string handler to a [class, method] array |
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* |
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* @param string $raw_handler |
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* @param string $default_method |
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* @param string $namespace |
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* @return array|null |
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*/ |
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protected function parseFromString( $raw_handler, $default_method, $namespace ) { |
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list( $class, $method ) = array_pad( preg_split( '/@|::/', $raw_handler, 2 ), 2, '' ); |
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if ( empty( $method ) ) { |
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$method = $default_method; |
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} |
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if ( ! empty( $class ) && ! empty( $method ) ) { |
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return [ |
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'class' => $class, |
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'method' => $method, |
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'namespace' => $namespace, |
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]; |
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} |
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return null; |
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} |
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/** |
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* Get the parsed handler |
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* |
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* @return array|Closure|null |
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*/ |
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public function get() { |
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return $this->handler; |
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} |
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/** |
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* Make an instance of the handler. |
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* |
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* @return object |
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*/ |
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public function make() { |
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$handler = $this->get(); |
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if ( $handler instanceof Closure ) { |
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return $handler; |
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} |
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$namespace = $handler['namespace']; |
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$class = $handler['class']; |
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try { |
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$instance = $this->injection_factory->make( $class ); |
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} catch ( ClassNotFoundException $e ) { |
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try { |
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$instance = $this->injection_factory->make( $namespace . $class ); |
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} catch ( ClassNotFoundException $e ) { |
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throw new ClassNotFoundException( 'Class not found - tried: ' . $class . ', ' . $namespace . $class ); |
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} |
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} |
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return $instance; |
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} |
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/** |
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* Execute the parsed handler with any provided arguments and return the result. |
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* |
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* @param mixed ,...$arguments |
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* @return mixed |
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*/ |
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public function execute() { |
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$arguments = func_get_args(); |
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$instance = $this->make(); |
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if ( $instance instanceof Closure ) { |
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return call_user_func_array( $instance, $arguments ); |
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} |
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return call_user_func_array( [$instance, $this->get()['method']], $arguments ); |
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} |
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} |
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htmlburger /
wpemerge
