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<?php
namespace Jasny\Controller;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* Execute controller on given route
*/
trait RouteAction
{
/**
* @var boolean
*/
protected $actionCancelled = false;
/**
* Get request, set for controller
*
* @return ServerRequestInterface
*/
abstract public function getRequest();
/**
* Get response. set for controller
*
* @return ResponseInterface
*/
abstract public function getResponse();
/**
* Respond with a server error
*
* @param string $message
* @param int $code HTTP status code
*/
abstract public function notFound($message = '', $code = 404);
/**
* Get the route
*
* @return \stdClass
*/
protected function getRoute()
{
$route = $this->getRequest()->getAttribute('route');
if (!isset($route)) {
throw new \LogicException("Route has not been set");
}
if (is_array($route)) {
$route = (object)$route;
}
if (!$route instanceof \stdClass) {
$type = (is_object($route) ? get_class($route) . ' ' : '') . gettype($route);
throw new \UnexpectedValueException("Expected route to be a stdClass object, not a $type");
}
return $route;
}
/**
* Get the method name of the action
*
* @param string $action
* @return string
*/
protected function getActionMethod($action)
{
return \Jasny\camelcase($action) . 'Action';
}
/**
* Called before executing the action.
* @codeCoverageIgnore
*
* <code>
* protected function beforeAction()
* {
* $this->respondWith('json'); // Respond with JSON by default
*
* if ($this->auth->getUser()->getCredits() <= 0) {
* $this->paymentRequired();
* }
* }
* </code>
*/
protected function before()
{
}
/**
* Called before executing the action.
* @codeCoverageIgnore
*/
protected function after()
{
}
/**
* Cancel the action
*/
public function cancel()
{
$this->actionCancelled = true;
}
/**
* Check if the action is cancelled
*
* @return boolean
*/
public function isCancelled()
{
return $this->actionCancelled;
}
/**
* Run the controller
*
* @return ResponseInterface
*/
public function run()
{
$route = $this->getRoute();
$method = $this->getActionMethod(isset($route->action) ? $route->action : 'default');
if (!method_exists($this, $method)) {
return $this->notFound();
}
$this->before();
if (!$this->isCancelled()) {
$args = isset($route->args) ? $route->args
: $this->getFunctionArgs($route, new \ReflectionMethod($this, $method));
call_user_func_array([$this, $method], $args);
}
$this->after();
}
/**
* Get the arguments for a function from a route using reflection
*
* @param \stdClass $route
* @param \ReflectionFunctionAbstract $refl
* @return array
*/
protected function getFunctionArgs(\stdClass $route, \ReflectionFunctionAbstract $refl)
{
$args = [];
$params = $refl->getParameters();
foreach ($params as $param) {
$key = $param->name;
if (property_exists($route, $key)) {
$value = $route->$key;
} else {
if (!$param->isOptional()) {
$fn = $refl instanceof \ReflectionMethod ? $refl->class . '::' . $refl->name : $refl->name;
throw new \RuntimeException("Missing argument '$key' for {$fn}()");
}
$value = $param->isDefaultValueAvailable() ? $param->getDefaultValue() : null;
}
$args[$key] = $value;
}
return $args;
}
}
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