ResponseFactory

ResponseFactory.php

interface DataResponseFactory
{
    function createFromData(array $responseData);
}

interface FooResponseFactory
{
    function createFromFoo(Foo $foo);
}

class RequestResponseFactory implements DataResponseFactory, FooResponseFactory 
{
    private $request;

    function __construct(Request $request) {
        $this->request = $request;
    }

    function createFromData(array $responseData) {
        $acceptHeader = $this->request->getHeader('Accept');
        if (strpos($acceptHeader, "text/xml") === 0) {
            return new XMLResponse($responseData);
        }

        return new JsonResponse($responseData);
    }

    function createFrom(Foo $foo) {
        $acceptHeader = $this->request->getHeader('Accept');
        if (strpos($acceptHeader, "text/xml") === 0) {
            return new XMLResponse($foo->toData());
        }

        return new JsonResponse($foo->toData());
    }
}