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<?php |
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namespace CarbonFramework\Routing; |
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use Closure; |
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use Exception; |
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use CarbonFramework\Framework; |
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/** |
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* Represent a callable or a controller method to be executed in response to a request |
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*/ |
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class Handler { |
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/** |
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* Actual handler |
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* |
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* @var callable|array|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 string|callable $handler |
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*/ |
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public function __construct( $handler ) { |
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$this->set( $handler ); |
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} |
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/** |
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* Parse a handler to a callable or a [class, method] array |
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* |
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* @param string|callable $handler |
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* @return callable|array|null |
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*/ |
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protected function parse( $handler ) { |
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if ( $handler instanceof Closure ) { |
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return $handler; |
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} |
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if ( is_string( $handler ) ) { |
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return $this->parseFromString( $handler ); |
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} |
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return null; |
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} |
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/** |
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* Parse a string handler to a callable or a [class, method] array |
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* |
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* @param string $handler |
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* @return callable|array|null |
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*/ |
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protected function parseFromString( $handler ) { |
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$handlerPieces = preg_split( '/@|::/', $handler, 2 ); |
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if ( count( $handlerPieces ) === 1 ) { |
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if ( is_callable( $handlerPieces[0] ) ) { |
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return $handlerPieces[0]; |
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} |
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return null; |
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} |
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return array( |
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'class' => $handlerPieces[0], |
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'method' => $handlerPieces[1], |
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); |
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} |
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/** |
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* Execute the handler returning raw result |
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* |
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* @return string|array|\Psr\Http\Message\ResponseInterface |
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*/ |
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protected function executeHandler() { |
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$arguments = func_get_args(); |
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if ( is_callable( $this->handler ) ) { |
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return call_user_func_array( $this->handler, $arguments ); |
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} |
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$class = $this->handler['class']; |
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$method = $this->handler['method']; |
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$controller = Framework::instantiate( $class ); |
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return call_user_func_array( [$controller, $method], $arguments ); |
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} |
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/** |
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* Set the handler |
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* |
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* @param string|callable $new_handler |
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* @return null |
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*/ |
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public function set( $new_handler ) { |
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$handler = $this->parse( $new_handler ); |
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if ( $handler === null ) { |
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throw new Exception( 'No or invalid handler provided.' ); |
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} |
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$this->handler = $handler; |
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} |
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/** |
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* Execute the handler |
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* |
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* @return \Psr\Http\Message\ResponseInterface |
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*/ |
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public function execute() { |
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$response = call_user_func_array( [$this, 'executeHandler'], func_get_args() ); |
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if ( is_string( $response ) ) { |
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return cf_output( $response ); |
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} |
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if ( is_array( $response ) ) { |
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return cf_json( $response ); |
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} |
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return $response; |
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} |
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} |
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htmlburger /
wpemerge
