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/***
This file is part of snapcast
Copyright (C) 2014-2025 Johannes Pohl
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#pragma once
// local headers
#include "client_info.hpp"
#include "codec_header.hpp"
#include "common/message/error.hpp"
#include "error.hpp"
#include "hello.hpp"
#include "pcm_chunk.hpp"
#include "server_settings.hpp"
#include "time.hpp"
namespace msg
{
/// Cast a BaseMessage @message to type "ToType"
/// @return castest message or nullptr, if the cast failed
template <typename ToType>
static std::unique_ptr<ToType> message_cast(std::unique_ptr<msg::BaseMessage> message)
{
auto* tmp = dynamic_cast<ToType*>(message.get());
if (tmp != nullptr)
{
message.release();
std::unique_ptr<ToType> result(tmp);
return result;
}
return nullptr;
}
namespace factory
{
/// Create a message of type T from @p base_message beaser and payload @p buffer
template <typename T>
static std::unique_ptr<T> createMessage(const BaseMessage& base_message, char* buffer)
{
std::unique_ptr<T> result = std::make_unique<T>();
if (!result)
return nullptr;
result->deserialize(base_message, buffer);
return result;
}
/// Create a BaseMessage from @p base_message header and payload @p buffer
static std::unique_ptr<BaseMessage> createMessage(const BaseMessage& base_message, char* buffer)
{
std::unique_ptr<BaseMessage> result;
switch (base_message.type)
{
case message_type::kCodecHeader:
return createMessage<CodecHeader>(base_message, buffer);
case message_type::kHello:
return createMessage<Hello>(base_message, buffer);
case message_type::kServerSettings:
return createMessage<ServerSettings>(base_message, buffer);
case message_type::kTime:
return createMessage<Time>(base_message, buffer);
case message_type::kWireChunk:
// this is kind of cheated to safe the convertion from WireChunk to PcmChunk
// the user of the factory must be aware that a PcmChunk will be created
return createMessage<PcmChunk>(base_message, buffer);
case message_type::kClientInfo:
return createMessage<ClientInfo>(base_message, buffer);
case message_type::kError:
return createMessage<msg::Error>(base_message, buffer);
default:
return nullptr;
}
}
} // namespace factory
} // namespace msg
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