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<?php
/**
* Copyright 2012-2014 Rackspace US, Inc.
*
* 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.
*/
namespace OpenCloud\Image\Resource\JsonPatch;
use OpenCloud\Image\Enum\Document as DocumentEnum;
/**
* Class that encodes a JSON document object into a flat string format
*
* @package OpenCloud\Images\Resource\JsonPatch
*/
class Encoder
{
/** @var array Required transformations for reserved characters */
protected static $transformations = array(
'~' => '~0',
'/' => '~1'
);
/**
* Encode the
* @param array $operations
* @return string
*/
public static function encode(array $operations)
{
$lines = array();
foreach ($operations as $operation) {
$lines[] = sprintf(
'{"%s": "%s", "%s": "%s", "%s": "%s"}',
DocumentEnum::OP, $operation->getType(),
DocumentEnum::PATH, $operation->getPath(),
DocumentEnum::VALUE, self::transform($operation->getValue())
);
}
return sprintf('[%s]', implode($lines, ','));
}
/**
* Search a given string and transform any reserved characters into their safe version
*
* @param $value
* @return string
*/
public static function transform($value)
{
return strtr((string) $value, self::$transformations);
}
}