/******************************************************************************
* Copyright (C) 2018 Kitsune Ral <kitsune-ral@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "stateevent.h"

using namespace QMatrixClient;

// Aside from the normal factory to instantiate StateEventBase inheritors
// StateEventBase itself can be instantiated if there's a state_key JSON key
// but the event type is unknown.
[[gnu::unused]] static auto stateEventTypeInitialised =
    RoomEvent::factory_t::addMethod(
        [] (const QJsonObject& json, const QString& matrixType) -> StateEventPtr
        {
            if (!json.contains(StateKeyKeyL))
                return nullptr;

            if (auto e = StateEventBase::factory_t::make(json, matrixType))
                return e;

            return makeEvent<StateEventBase>(unknownEventTypeId(), json);
        });

StateEventBase::StateEventBase(Event::Type type, event_mtype_t matrixType,
                               const QString &stateKey,
                               const QJsonObject &contentJson)
    : RoomEvent(type, basicStateEventJson(matrixType, contentJson, stateKey))
{ }

bool StateEventBase::repeatsState() const
{
    const auto prevContentJson = unsignedJson().value(PrevContentKeyL);
    return fullJson().value(ContentKeyL) == prevContentJson;
}

QString StateEventBase::replacedState() const
{
    return unsignedJson().value("replaces_state"_ls).toString();
}

void StateEventBase::dumpTo(QDebug dbg) const
{
    if (!stateKey().isEmpty())
        dbg << '<' << stateKey() << "> ";
    if (unsignedJson().contains(PrevContentKeyL))
        dbg << QJsonDocument(unsignedJson()[PrevContentKeyL].toObject())
               .toJson(QJsonDocument::Compact) << " -> ";
    RoomEvent::dumpTo(dbg);
}