<?php
/**
 * Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 */

namespace Aws\Common\Signature;

use Aws\Common\Credentials\CredentialsInterface;
use Guzzle\Http\Message\RequestInterface;

abstract class AbstractSignature implements SignatureInterface
{
    /**
     * Provides the timestamp used for the class (used for mocking PHP's time() function)
     *
     * @return int
     */
    protected function getTimestamp()
    {
        return time();
    }

    /**
     * @codeCoverageIgnore
     */
    public function createPresignedUrl(
        RequestInterface $request,
        CredentialsInterface $credentials,
        $expires
    ) {
        throw new \BadMethodCallException(__METHOD__ . ' not implemented');
    }
}