mpd-dbcreate/src/lib/dbus/Message.hxx

// SPDX-License-Identifier: BSD-2-Clause
// Copyright CM4all GmbH
// author: Max Kellermann <mk@cm4all.com>

#pragma once

#include <dbus/dbus.h>

#include <utility>

namespace ODBus {

class Message {
	DBusMessage *msg = nullptr;

	explicit Message(DBusMessage *_msg) noexcept
		:msg(_msg) {}

public:
	Message() noexcept = default;

	Message(Message &&src) noexcept
		:msg(std::exchange(src.msg, nullptr)) {}

	~Message() noexcept {
		if (msg != nullptr)
			dbus_message_unref(msg);
	}

	DBusMessage *Get() noexcept {
		return msg;
	}

	Message &operator=(Message &&src) noexcept {
		std::swap(msg, src.msg);
		return *this;
	}

	static Message NewMethodCall(const char *destination,
				     const char *path,
				     const char *iface,
				     const char *method);

	static Message StealReply(DBusPendingCall &pending);

	static Message Pop(DBusConnection &connection) noexcept;

	bool IsDefined() const noexcept {
		return msg != nullptr;
	}

	int GetType() noexcept {
		return dbus_message_get_type(msg);
	}

	const char *GetPath() noexcept {
		return dbus_message_get_path(msg);
	}

	bool HasPath(const char *object_path) noexcept {
		return dbus_message_has_path(msg, object_path);
	}

	const char *GetInterface() noexcept {
		return dbus_message_get_interface(msg);
	}

	bool HasInterface(const char *iface) noexcept {
		return dbus_message_has_interface(msg, iface);
	}

	const char *GetMember() noexcept {
		return dbus_message_get_member(msg);
	}

	bool HasMember(const char *member) noexcept {
		return dbus_message_has_member(msg, member);
	}

	bool IsError(const char *error_name) const noexcept {
		return dbus_message_is_error(msg, error_name);
	}

	const char *GetErrorName() const noexcept {
		return dbus_message_get_error_name(msg);
	}

	const char *GetDestination() const noexcept {
		return dbus_message_get_destination(msg);
	}

	const char *GetSender() const noexcept {
		return dbus_message_get_sender(msg);
	}

	const char *GetSignature() const noexcept {
		return dbus_message_get_signature(msg);
	}

	bool GetNoReply() const noexcept {
		return dbus_message_get_no_reply(msg);
	}

	bool IsMethodCall(const char *iface,
			  const char *method) const noexcept {
		return dbus_message_is_method_call(msg, iface, method);
	}

	bool IsSignal(const char *iface,
		      const char *signal_name) const noexcept {
		return dbus_message_is_signal(msg, iface, signal_name);
	}

	void CheckThrowError();

	template<typename... Args>
	bool GetArgs(DBusError &error, Args... args) noexcept {
		return dbus_message_get_args(msg, &error,
					     std::forward<Args>(args)...,
					     DBUS_TYPE_INVALID);
	}
};

} /* namespace ODBus */