Chain.php

<?php
 
namespace Http\Message\Authentication;
 
use Http\Message\Authentication;
use Psr\Http\Message\RequestInterface;
 
final class Chain implements Authentication
{
    private $authenticationChain = [];
 
    public function __construct(array $authenticationChain = [])
    {
        foreach ($authenticationChain as $authentication) {
            if (!$authentication instanceof Authentication) {
                throw new \InvalidArgumentException(
                    'Members of the authentication chain must be of type Http\Message\Authentication'
                );
            }
        }
 
        $this->authenticationChain = $authenticationChain;
    }
 
    public function authenticate(RequestInterface $request)
    {
        foreach ($this->authenticationChain as $authentication) {
            $request = $authentication->authenticate($request);
        }
 
        return $request;
    }
}