<?php



/**

 * LICENSE: 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.

 * 

 * PHP version 5

 *

 * @category  Microsoft

 * @package   WindowsAzure\Table\Internal

 * @author    Azure PHP SDK <azurephpsdk@microsoft.com>

 * @copyright 2012 Microsoft Corporation

 * @license   http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0

 * @link      https://github.com/windowsazure/azure-sdk-for-php

 */

 

namespace WindowsAzure\Table\Internal;

require_once 'PEAR.php';

require_once 'Mail/mimePart.php';

require_once 'Mail/mimeDecode.php';

use WindowsAzure\Common\Internal\Resources;

use WindowsAzure\Common\Internal\Utilities;



/**

 * Reads and writes MIME for batch API.

 *

 * @category  Microsoft

 * @package   WindowsAzure\Table\Internal

 * @author    Azure PHP SDK <azurephpsdk@microsoft.com>

 * @copyright 2012 Microsoft Corporation

 * @license   http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0

 * @version   Release: @package_version@

 * @link      https://github.com/windowsazure/azure-sdk-for-php

 */

class MimeReaderWriter implements IMimeReaderWriter

{

    /**

     * Given array of MIME parts in raw string, this function converts them into MIME

     * representation. 

     * 

     * @param array $bodyPartContents The MIME body parts.

     * 

     * @return array Returns array with two elements 'headers' and 'body' which

     * represents the MIME message.

     */

    public function encodeMimeMultipart($bodyPartContents)

    {

        $count         = count($bodyPartContents);

        $mimeType      = Resources::MULTIPART_MIXED_TYPE;

        $batchGuid     = Utilities::getGuid();

        $batchId       = sprintf('batch_%s', $batchGuid);

        $contentType1  = array('content_type' => "$mimeType");

        $changeSetGuid = Utilities::getGuid();

        $changeSetId   = sprintf('changeset_%s', $changeSetGuid);

        $contentType2  = array('content_type' => "$mimeType; boundary=$changeSetId");

        $options       = array(

            'encoding'     => 'binary',

            'content_type' => Resources::HTTP_TYPE

        );



        // Create changeset MIME part

        $changeSet = new \Mail_mimePart();

        

        for ($i = 0; $i < $count; $i++) {

            $changeSet->addSubpart($bodyPartContents[$i], $options);

        }

        

        // Encode the changeset MIME part

        $changeSetEncoded = $changeSet->encode($changeSetId);

        

        // Create the batch MIME part

        $batch = new \Mail_mimePart(Resources::EMPTY_STRING, $contentType1);

        

        // Add changeset encoded to batch MIME part

        $batch->addSubpart($changeSetEncoded['body'], $contentType2);

        

        // Encode batch MIME part

        $batchEncoded = $batch->encode($batchId);

        

        return $batchEncoded;

    }

    

    /**

     * Parses given mime HTTP response body into array. Each array element 

     * represents a change set result.

     * 

     * @param string $mimeBody The raw MIME body result.

     * 

     * @return array

     */

    public function decodeMimeMultipart($mimeBody)

    {

        $params['include_bodies'] = true;

        $params['input']          = $mimeBody;

        $mimeDecoder              = new \Mail_mimeDecode($mimeBody);

        $structure                = $mimeDecoder->decode($params);

        $parts                    = $structure->parts;

        $bodies                   = array();

        

        foreach ($parts as $part) {

            $bodies[] = $part->body;

        }

        

        return $bodies;

    }

}