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<?php
/**
* ownCloud - galleryplus
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Olivier Paroz <owncloud@interfasys.ch>
* @author Jordi Boggiano <j.boggiano@seld.be>
*
* @copyright Olivier Paroz 2015
* @copyright Jordi Boggiano 2014-2015
*/
namespace OCA\GalleryPlus\Utility;
/**
* Lets us call the main logger without having to add the context at every
* request
*
* @package OCA\GalleryPlus\Utility
*/
class Normalizer {
/**
* Converts Objects, Arrays and Exceptions to String
*
* @param $data
* @param int $depth
*
* @return string|array
*/
public function normalize($data, $depth = 0) {
$scalar = $this->normalizeScalar($data);
if (!is_array($scalar)) {
return $scalar;
}
$decisionArray = [
$this->normalizeTraversable($data, $depth),
$this->normalizeObject($data, $depth),
$this->normalizeResource($data),
];
foreach ($decisionArray as $dataType) {
if ($dataType !== null) {
return $dataType;
}
}
return '[unknown(' . gettype($data) . ')]';
}
/**
* Returns various, filtered, scalar elements
*
* We're returning an array here to detect failure because null is a scalar and so is false
*
* @param $data
*
* @return mixed
*/
private function normalizeScalar($data) {
if (null === $data || is_scalar($data)) {
/*// utf8_encode only works for Latin1 so we rely on mbstring
if (is_string($data)) {
$data = mb_convert_encoding($data, "UTF-8");
}*/
return $data;
}
return [];
}
/**
* Returns an array containing normalized elements
*
* @param $data
* @param int $depth
*
* @return array|null
*/
private function normalizeTraversable($data, $depth = 0) {
if (is_array($data) || $data instanceof \Traversable) {
return $this->normalizeTraversableElement($data, $depth);
}
return null;
}
/**
* Converts each element of a traversable variable to String
*
* @param $data
* @param int $depth
*
* @return array
*/
private function normalizeTraversableElement($data, $depth) {
$maxArrayRecursion = 20;
$count = 1;
$normalized = [];
foreach ($data as $key => $value) {
if ($count++ >= $maxArrayRecursion) {
$normalized['...'] =
'Over ' . $maxArrayRecursion . ' items, aborting normalization';
break;
}
$normalized[$key] = $this->normalize($value, $depth);
}
return $normalized;
}
/**
* Converts an Object to String
*
* @param mixed $data
* @param int $depth
*
* @return array|null
*/
private function normalizeObject($data, $depth) {
if (is_object($data)) {
if ($data instanceof \Exception) {
return $this->normalizeException($data);
}
// We don't need to go too deep in the recursion
$maxObjectRecursion = 2;
$response = $data;
$arrayObject = new \ArrayObject($data);
$serializedObject = $arrayObject->getArrayCopy();
if ($depth < $maxObjectRecursion) {
$depth++;
$response = $this->normalize($serializedObject, $depth);
}
// Don't convert to json here as we would double encode
return [sprintf("[object] (%s)", get_class($data)), $response];
}
return null;
}
/**
* Converts an Exception to String
*
* @param \Exception $exception
*
* @return string[]
*/
private function normalizeException(\Exception $exception) {
$data = [
'class' => get_class($exception),
'message' => $exception->getMessage(),
'code' => $exception->getCode(),
'file' => $exception->getFile() . ':' . $exception->getLine(),
];
$trace = $exception->getTraceAsString();
$data['trace'][] = $trace;
$previous = $exception->getPrevious();
if ($previous) {
$data['previous'] = $this->normalizeException($previous);
}
return $data;
}
/**
* Converts a resource to a String
*
* @param $data
*
* @return string|null
*/
private function normalizeResource($data) {
if (is_resource($data)) {
return "[resource] " . substr((string)$data, 0, 40);
}
return null;
}
}
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