<?php namespace OAuth2\Services;

/**
 * Copyright 2016 OpenStack Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

use OAuth2\OAuth2Protocol;
use Utils\Model\Identifier;
use Utils\Services\UniqueIdentifierGenerator;
use Zend\Math\Rand;

/**
 * Class OAuth2TokenGenerator
 * @package OAuth2\Services
 */
class OAuth2TokenGenerator extends UniqueIdentifierGenerator
{
    /**
     * @param Identifier $identifier
     * @return Identifier
     */
    protected function _generate(Identifier $identifier)
    {
        return $identifier->setValue(Rand::getString($identifier->getLenght(), OAuth2Protocol::VsChar, true));
    }
}