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<?php
namespace Protobuf;
use Traversable;
use Protobuf\Enum;
use Protobuf\Stream;
use ReflectionClass;
use ReflectionProperty;
use Protobuf\MessageInterface;
/**
* This serializes to text format
*
* @author Iván Montes <drslump@pollinimini.net>
* @author Fabio B. Silva <fabio.bat.silva@gmail.com>
*/
class TextFormat
{
/**
* @param \Protobuf\Message $message
* @param integer $level
*
* @return \Protobuf\Stream
*/
public function encodeMessage(Message $message, $level = 0)
{
$reflect = new ReflectionClass($message);
$properties = $reflect->getProperties(ReflectionProperty::IS_PROTECTED);
$indent = str_repeat(' ', $level);
$stream = Stream::create();
foreach ($properties as $property) {
$property->setAccessible(true);
$name = $property->getName();
$value = $property->getValue($message);
if ($value === null) {
continue;
}
if ( ! is_array($value) && ! ($value instanceof Traversable)) {
if ( ! $value instanceof Message) {
$item = $this->encodeValue($value);
$buffer = $indent . $name . ': ' . $item . PHP_EOL;
$stream->write($buffer, strlen($buffer));
continue;
}
$innerStream = $this->encodeMessage($value, $level + 1);
$beginMessage = $indent . $name . ' {' . PHP_EOL;
$endMessage = $indent . '}' . PHP_EOL;
$stream->write($beginMessage, strlen($beginMessage));
$stream->writeStream($innerStream, $innerStream->getSize());
$stream->write($endMessage, strlen($endMessage));
continue;
}
foreach ($value as $val) {
// Skip nullified repeated values
if ($val == null) {
continue;
}
if ( ! $val instanceof Message) {
$item = $this->encodeValue($val);
$buffer = $indent . $name . ': ' . $item . PHP_EOL;
$stream->write($buffer, strlen($buffer));
continue;
}
$innerStream = $this->encodeMessage($val, $level + 1);
$beginMessage = $indent . $name . ' {' . PHP_EOL;
$endMessage = $indent . '}' . PHP_EOL;
$stream->write($beginMessage, strlen($beginMessage));
$stream->writeStream($innerStream, $innerStream->getSize());
$stream->write($endMessage, strlen($endMessage));
}
}
$stream->seek(0);
return $stream;
}
/**
* @param scalar|array $value
*
* @return string
*/
public function encodeValue($value)
{
if (is_bool($value)) {
return (int) $value;
}
if ($value instanceof Enum) {
return $value->name();
}
if ($value instanceof Stream) {
return json_encode($value->__toString());
}
return json_encode($value);
}
}