vendor/bshaffer/oauth2-server-bundle/OAuth2/ServerBundle/Storage/Scope.php

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<?php

namespace OAuth2\ServerBundle\Storage;

use OAuth2\Storage\ScopeInterface;
use OAuth2\ServerBundle\Manager\ScopeManagerInterface;
use Doctrine\ORM\EntityManager;

class Scope implements ScopeInterface
{
    private $em;

    /**
     * @var ScopeManagerInterface
     */
    private $sm;

    public function __construct(EntityManager $entityManager, ScopeManagerInterface $scopeManager)
    {
        $this->em = $entityManager;
        $this->sm = $scopeManager;
    }

    /**
     * Check if the provided scope exists.
     *
     * @param $scope
     * A space-separated string of scopes.
     * @param $client_id
     * The requesting client.
     *
     * @return
     * TRUE if it exists, FALSE otherwise.
     */
    public function scopeExists($scope, $client_id = null)
    {
        $scopes = explode(' ', $scope);
        if ($client_id) {
            // Get Client
            $client = $this->em->getRepository('OAuth2ServerBundle:Client')->find($client_id);

            if (!$client) {
                return false;
            }

            $valid_scopes = $client->getScopes();

            foreach ($scopes as $scope) {
                if (!in_array($scope, $valid_scopes)) {
                    return false;
                }
            }

            return true;
        }

        $valid_scopes = $this->sm->findScopesByScopes($scopes);

        return count($valid_scopes) == count($scopes);
    }