/**
* Parses protobuf file and returns MessageDescriptor
*
* @param FileDescriptor $file File descriptors
* @param string $messageContent Protobuf message content
* @param MessageDescriptor $parent Parent message (if nested)
*
* @return MessageDescriptor
*
* @throws Exception
*/
private function _parseMessageType(FileDescriptor $file, $messageContent, MessageDescriptor $parent = null)
{
if ($messageContent == '') {
return;
}
while (strlen($messageContent) > 0) {
$next = $this->_next($messageContent);
if (strtolower($next) == 'message') {
$messageContent = trim(substr($messageContent, strlen($next)));
$name = $this->_next($messageContent);
$offset = $this->_getBeginEnd($messageContent, '{', '}');
// now extract the content and call parse_message again
$content = trim(substr($messageContent, $offset['begin'] + 1, $offset['end'] - $offset['begin'] - 2));
$childMessage = new MessageDescriptor($name, $file, $parent);
$this->_parseMessageType($file, $content, $childMessage);
$messageContent = '' . trim(substr($messageContent, $offset['end']));
} else {
if (strtolower($next) == 'enum') {
$messageContent = trim(substr($messageContent, strlen($next)));
$name = $this->_next($messageContent);
$offset = $this->_getBeginEnd($messageContent, '{', '}');
// now extract the content and call parse_message again
$content = trim(substr($messageContent, $offset['begin'] + 1, $offset['end'] - $offset['begin'] - 2));
$enum = new EnumDescriptor($name, $file, $parent);
$this->_parseEnum($enum, $content);
// removing it from string
$messageContent = '' . trim(substr($messageContent, $offset['end']));
} else {
if (strtolower($next) == 'import') {
$name = $this->_next($messageContent);
$match = preg_match('/"([^"]+)";*\\s?/', $messageContent, $matches, PREG_OFFSET_CAPTURE);
if (!$match) {
throw new Exception('Malformed include / look at your import statement: ' . $messageContent);
}
$includedFilename = $matches[1][0];
if (!file_exists($includedFilename)) {
throw new Exception('Included file ' . $includedFilename . ' does not exist');
}
$messageContent = trim(substr($messageContent, $matches[0][1] + strlen($matches[0][0])));
$parserKey = realpath($includedFilename);
if (!isset(self::$_parsers[$parserKey])) {
$pbp = new ProtobufParser($this->_useNativeNamespaces);
self::$_parsers[$parserKey] = $pbp;
} else {
$pbp = self::$_parsers[$parserKey];
}
$file->addDependency($pbp->parse($includedFilename));
} else {
if (strtolower($next) == 'option') {
// We don't support option parameters just yet, skip for now.
$messageContent = preg_replace('/^.+\\n/', '', $messageContent);
} else {
if (strtolower($next) == 'package') {
$match = preg_match('/package[\\s]+([^;]+);?/', $messageContent, $matches, PREG_OFFSET_CAPTURE);
if (!$match) {
throw new Exception('Malformed package');
}
$file->setPackage($matches[1][0]);
$messageContent = trim(substr($messageContent, $matches[0][1] + strlen($matches[0][0])));
} else {
// now a normal field
$match = preg_match('/(.*);/', $messageContent, $matches, PREG_OFFSET_CAPTURE);
if (!$match || !$parent) {
throw new Exception('Proto file missformed');
}
$parent->addField($this->_parseField($matches[0][0]));
$messageContent = trim(substr($messageContent, $matches[0][1] + strlen($matches[0][0])));
}
}
}
}
}
}
}
