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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
{
/**
* Get request, set for controller
*
* @return ServerRequestInterface
*/
abstract protected function getRequest();
/**
* Get response. set for controller
*
* @return ResponseInterface
*/
abstract protected function getResponse();
/**
* Respond with a server error
*
* @param string $message
* @param int $code HTTP status code
*/
abstract public function notFound($message = '', $code = 404);
/**
* Check if response is 2xx succesful, or empty
*
* @return boolean
*/
abstract public function isSuccessful();
/**
* Called before executing the action.
* If the response is no longer a success statuc (>= 300), the action will not be executed.
*
* <code>
* protected function beforeAction()
* {
* $this->respondWith('json'); // Respond with JSON by default
*
* if ($this->auth->getUser()->getCredits() <= 0) {
* $this->paymentRequired();
* }
* }
* </code>
*/
protected function beforeAction()
{
}
/**
* Run the controller
*
* @return ResponseInterface
*/
public function run()
{
$route = $this->getRequest()->getAttribute('route');
$method = $this->getActionMethod(isset($route->action) ? $route->action : 'default');
if (!method_exists($this, $method)) {
return $this->notFound();
}
$args = isset($route->args)
? $route->args
: $this->getFunctionArgs($route, new \ReflectionMethod($this, $method));
$this->beforeAction();
if ($this->isSuccessful()) {
call_user_func_array([$this, $method], $args);
}
return $this->getResponse();
}
/**
* Get the method name of the action
*
* @param string $action
* @return string
*/
protected function getActionMethod($action)
{
return \Jasny\camelcase($action) . 'Action';
}
/**
* Get the arguments for a function from a route using reflection
*
* @param object $route
* @param \ReflectionFunctionAbstract $refl
* @return array
*/
protected function getFunctionArgs($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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