* @copyright 2015 - 2017 Timothy J. Warren * @license http://www.opensource.org/licenses/mit-license.html MIT License * @version 2.0.0 * @link https://git.timshomepage.net/timw4mail/ion */ namespace Aviat\Ion; use Psr\Http\Message\ResponseInterface; use Aviat\Ion\Di\ContainerInterface; use Aviat\Ion\Exception\DoubleRenderException; /** * Base view response class */ abstract class View // partially implements ViewInterface { use Di\ContainerAware; use StringWrapper; /** * HTTP response Object * * @var ResponseInterface */ public $response; /** * If the view has sent output via * __toString or send method * * @var boolean */ protected $hasRendered = FALSE; /** * Constructor * * @param ContainerInterface $container */ public function __construct(ContainerInterface $container) { $this->setContainer($container); $this->response = $container->get('response'); } /** * Send output to client */ public function __destruct() { if ( ! $this->hasRendered) { $this->send(); } } /** * Return rendered output as string. Renders the view, * and any attempts to call again will result in a DoubleRenderException * * @throws DoubleRenderException * @return string */ public function __toString(): string { if ($this->hasRendered) { throw new DoubleRenderException(); } $this->hasRendered = TRUE; return $this->getOutput(); } /** * Add an http header * * @param string $name * @param string|string[] $value * @return ViewInterface */ public function addHeader(string $name, $value): ViewInterface { $this->response = $this->response->withHeader($name, $value); return $this; } /** * Set the output string * * @param mixed $string * @return ViewInterface */ public function setOutput($string): ViewInterface { $this->response->getBody()->write($string); return $this; } /** * Append additional output. * * @param string $string * @return ViewInterface */ public function appendOutput(string $string): ViewInterface { return $this->setOutput($string); } /** * Get the current output as a string. Does not * render view or send headers. * * @return string */ public function getOutput(): string { return $this->response->getBody()->__toString(); } } // End of View.php