<?php 
 
/* 
 * This file is part of Sulu. 
 * 
 * (c) Sulu GmbH 
 * 
 * This source file is subject to the MIT license that is bundled 
 * with this source code in the file LICENSE. 
 */ 
 
namespace Sulu\Component\Security\Authorization; 
 
use Sulu\Bundle\SecurityBundle\Entity\User; 
use Sulu\Component\Security\Authorization\AccessControl\AccessControlManagerInterface; 
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface; 
use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface; 
 
/** 
 * Checks the Sulu security. 
 */ 
class SecurityContextVoter implements VoterInterface 
{ 
    /** 
     * The permissions available, defined by config. 
     * 
     * @var array 
     */ 
    private $permissions; 
 
    /** 
     * @var AccessControlManagerInterface 
     */ 
    private $accessControlManager; 
 
    public function __construct(AccessControlManagerInterface $accessControlManager, $permissions) 
    { 
        $this->accessControlManager = $accessControlManager; 
        $this->permissions = $permissions; 
    } 
 
    public function supportsAttribute($attribute) 
    { 
        return \in_array($attribute, \array_keys($this->permissions)); 
    } 
 
    public function supportsClass($class) 
    { 
        return SecurityCondition::class === $class || \is_subclass_of($class, SecurityCondition::class); 
    } 
 
    public function vote(TokenInterface $token, $object, array $attributes) 
    { 
        /** @var User $user */ 
        $user = $token->getUser(); 
 
        if (!\is_object($object) 
            || !$this->supportsClass(\get_class($object)) 
        ) { 
            return VoterInterface::ACCESS_ABSTAIN; 
        } 
 
        $userPermissions = $this->accessControlManager->getUserPermissions($object, $user); 
        if (0 === \count($userPermissions)) { 
            return VoterInterface::ACCESS_DENIED; 
        } 
 
        // only if all attributes are granted the access is granted 
        foreach ($attributes as $attribute) { 
            if (isset($userPermissions[$attribute]) && !$userPermissions[$attribute]) { 
                return VoterInterface::ACCESS_DENIED; 
            } 
        } 
 
        return VoterInterface::ACCESS_GRANTED; 
    } 
}