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// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
#pragma once
#include "olm/olm.h"
#include "e2ee/qolmerrors.h"
#include "e2ee/e2ee.h"
#include <memory>
namespace Quotient {
//! An out-bound group session is responsible for encrypting outgoing
//! communication in a Megolm session.
class QOlmOutboundGroupSession
{
public:
~QOlmOutboundGroupSession();
//! Creates a new instance of `QOlmOutboundGroupSession`.
//! Throw OlmError on errors
static std::unique_ptr<QOlmOutboundGroupSession> create();
//! Serialises a `QOlmOutboundGroupSession` to encrypted Base64.
std::variant<QByteArray, QOlmError> pickle(const PicklingMode &mode);
//! Deserialises from encrypted Base64 that was previously obtained by
//! pickling a `QOlmOutboundGroupSession`.
static std::variant<std::unique_ptr<QOlmOutboundGroupSession>, QOlmError> unpickle(QByteArray &pickled, const PicklingMode &mode);
//! Encrypts a plaintext message using the session.
std::variant<QByteArray, QOlmError> encrypt(const QString &plaintext);
//! Get the current message index for this session.
//!
//! Each message is sent with an increasing index; this returns the
//! index for the next message.
uint32_t sessionMessageIndex() const;
//! Get a base64-encoded identifier for this session.
QByteArray sessionId() const;
//! Get the base64-encoded current ratchet key for this session.
//!
//! Each message is sent with a different ratchet key. This function returns the
//! ratchet key that will be used for the next message.
std::variant<QByteArray, QOlmError> sessionKey() const;
QOlmOutboundGroupSession(OlmOutboundGroupSession *groupSession);
private:
OlmOutboundGroupSession *m_groupSession;
};
using QOlmOutboundGroupSessionPtr = std::unique_ptr<QOlmOutboundGroupSession>;
using OlmOutboundGroupSessionPtr = std::unique_ptr<OlmOutboundGroupSession>;
}
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