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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 "common/json.hpp"
#include "message.hpp"
using json = nlohmann::json;
namespace msg
{
/// Base class of a message with json payload
class JsonMessage : public BaseMessage
{
public:
/// c'tor taking the @p msg_type
explicit JsonMessage(message_type msg_type) : BaseMessage(msg_type)
{
}
/// d'tor
~JsonMessage() override = default;
void read(std::istream& stream) override
{
std::string s;
readVal(stream, s);
msg = json::parse(s);
}
uint32_t getSize() const override
{
return static_cast<uint32_t>(sizeof(uint32_t) + msg.dump().size());
}
/// the json message payload
json msg;
protected:
void doserialize(std::ostream& stream) const override
{
writeVal(stream, msg.dump());
}
/// @return value for key @p what or @p def, if not found
template <typename T>
T get(const std::string& what, const T& def) const
{
try
{
if (!msg.count(what))
return def;
return msg[what].get<T>();
}
catch (...)
{
return def;
}
}
};
} // namespace msg
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