Proyectos de Subversion Moodle

<?php

namespace Aws\S3;

use Aws\Arn\ArnParser;

use Aws\Arn\S3\AccessPointArn;

use Aws\Exception\MultipartUploadException;

use Aws\Result;

use Aws\S3\Exception\S3Exception;

use GuzzleHttp\Promise\Coroutine;

use GuzzleHttp\Promise\PromisorInterface;

use InvalidArgumentException;

/**

 * Copies objects from one S3 location to another, utilizing a multipart copy

 * when appropriate.

 */

class ObjectCopier implements PromisorInterface

{

    const DEFAULT_MULTIPART_THRESHOLD = MultipartUploader::PART_MAX_SIZE;

    private $client;

    private $source;

    private $destination;

    private $acl;

    private $options;

    private static $defaults = [

        'before_lookup' => null,

        'before_upload' => null,

        'concurrency'   => 5,

        'mup_threshold' => self::DEFAULT_MULTIPART_THRESHOLD,

        'params'        => [],

        'part_size'     => null,

        'version_id'    => null,

    ];

    /**

     * @param S3ClientInterface $client         The S3 Client used to execute

     *                                          the copy command(s).

     * @param array             $source         The object to copy, specified as

     *                                          an array with a 'Bucket' and

     *                                          'Key' keys. Provide a

     *                                          'VersionID' key to copy a

     *                                          specified version of an object.

     * @param array             $destination    The bucket and key to which to

     *                                          copy the $source, specified as

     *                                          an array with a 'Bucket' and

     *                                          'Key' keys.

     * @param string            $acl            ACL to apply to the copy

     *                                          (default: private).

     * @param array             $options        Options used to configure the

     *                                          copy process. Options passed in

     *                                          through 'params' are added to

     *                                          the sub commands.

     *

     * @throws InvalidArgumentException

     */

    public function __construct(

        S3ClientInterface $client,

        array $source,

        array $destination,

        $acl = 'private',

        array $options = []

    ) {

        $this->validateLocation($source);

        $this->validateLocation($destination);

        $this->client = $client;

        $this->source = $source;

        $this->destination = $destination;

        $this->acl = $acl;

        $this->options = $options + self::$defaults;

    }

    /**

     * Perform the configured copy asynchronously. Returns a promise that is

     * fulfilled with the result of the CompleteMultipartUpload or CopyObject

     * operation or rejected with an exception.

     *

     * @return Coroutine

     */

    public function promise()

    {

        return Coroutine::of(function () {

            $headObjectCommand = $this->client->getCommand(

                'HeadObject',

                $this->options['params'] + $this->source

            );

            if (is_callable($this->options['before_lookup'])) {

                $this->options['before_lookup']($headObjectCommand);

            }

            $objectStats = (yield $this->client->executeAsync(

                $headObjectCommand

            ));

            if ($objectStats['ContentLength'] > $this->options['mup_threshold']) {

                $mup = new MultipartCopy(

                    $this->client,

                    $this->getSourcePath(),

                    ['source_metadata' => $objectStats, 'acl' => $this->acl]

                        + $this->destination

                        + $this->options

                );

                yield $mup->promise();

            } else {

                $defaults = [

                    'ACL' => $this->acl,

                    'MetadataDirective' => 'COPY',

                    'CopySource' => $this->getSourcePath(),

                ];

                $params = array_diff_key($this->options, self::$defaults)

                    + $this->destination + $defaults + $this->options['params'];

                yield $this->client->executeAsync(

                    $this->client->getCommand('CopyObject', $params)

                );

            }

        });

    }

    /**

     * Perform the configured copy synchronously. Returns the result of the

     * CompleteMultipartUpload or CopyObject operation.

     *

     * @return Result

     *

     * @throws S3Exception

     * @throws MultipartUploadException

     */

    public function copy()

    {

        return $this->promise()->wait();

    }

    private function validateLocation(array $location)

    {

        if (empty($location['Bucket']) || empty($location['Key'])) {

            throw new \InvalidArgumentException('Locations provided to an'

                . ' Aws\S3\ObjectCopier must have a non-empty Bucket and Key');

        }

    }

    private function getSourcePath()

    {

        $path = "/{$this->source['Bucket']}/";

        if (ArnParser::isArn($this->source['Bucket'])) {

            try {

                new AccessPointArn($this->source['Bucket']);

                $path = "{$this->source['Bucket']}/object/";

            } catch (\Exception $e) {

                throw new \InvalidArgumentException(

                    'Provided ARN was a not a valid S3 access point ARN ('

                    . $e->getMessage() . ')',

                    0,

                    $e

                );

            }

        }

        $sourcePath = $path . rawurlencode($this->source['Key']);

        if (isset($this->source['VersionId'])) {

            $sourcePath .= "?versionId={$this->source['VersionId']}";

        }

        return $sourcePath;

    }

}