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/*
* nheko Copyright (C) 2019 The nheko authors
* nheko Copyright (C) 2017 Konstantinos Sideris <siderisk@auth.gr>
*
* 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
#include <optional>
#include <QDateTime>
#include <QDir>
#include <QImage>
#include <QString>
#if __has_include(<lmdbxx/lmdb++.h>)
#include <lmdbxx/lmdb++.h>
#else
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#include <nlohmann/json.hpp>
#include <mtx/responses.hpp>
#include <mtxclient/crypto/client.hpp>
#include "CacheCryptoStructs.h"
#include "CacheStructs.h"
int
numeric_key_comparison(const MDB_val *a, const MDB_val *b);
class Cache : public QObject
{
Q_OBJECT
public:
Cache(const QString &userId, QObject *parent = nullptr);
static std::string displayName(const std::string &room_id, const std::string &user_id);
static QString displayName(const QString &room_id, const QString &user_id);
static QString avatarUrl(const QString &room_id, const QString &user_id);
static void removeDisplayName(const QString &room_id, const QString &user_id);
static void removeAvatarUrl(const QString &room_id, const QString &user_id);
static void insertDisplayName(const QString &room_id,
const QString &user_id,
const QString &display_name);
static void insertAvatarUrl(const QString &room_id,
const QString &user_id,
const QString &avatar_url);
//! Load saved data for the display names & avatars.
void populateMembers();
std::vector<std::string> joinedRooms();
QMap<QString, RoomInfo> roomInfo(bool withInvites = true);
std::map<QString, bool> invites();
//! Calculate & return the name of the room.
QString getRoomName(lmdb::txn &txn, lmdb::dbi &statesdb, lmdb::dbi &membersdb);
//! Get room join rules
mtx::events::state::JoinRule getRoomJoinRule(lmdb::txn &txn, lmdb::dbi &statesdb);
bool getRoomGuestAccess(lmdb::txn &txn, lmdb::dbi &statesdb);
//! Retrieve the topic of the room if any.
QString getRoomTopic(lmdb::txn &txn, lmdb::dbi &statesdb);
//! Retrieve the room avatar's url if any.
QString getRoomAvatarUrl(lmdb::txn &txn,
lmdb::dbi &statesdb,
lmdb::dbi &membersdb,
const QString &room_id);
//! Retrieve the version of the room if any.
QString getRoomVersion(lmdb::txn &txn, lmdb::dbi &statesdb);
//! Retrieve member info from a room.
std::vector<RoomMember> getMembers(const std::string &room_id,
std::size_t startIndex = 0,
std::size_t len = 30);
void saveState(const mtx::responses::Sync &res);
bool isInitialized() const;
std::string nextBatchToken() const;
void deleteData();
void removeInvite(lmdb::txn &txn, const std::string &room_id);
void removeInvite(const std::string &room_id);
void removeRoom(lmdb::txn &txn, const std::string &roomid);
void removeRoom(const std::string &roomid);
void setup();
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std::map<QString, mtx::responses::Timeline> roomMessages();
QMap<QString, mtx::responses::Notifications> getTimelineMentions();
//! Retrieve all the user ids from a room.
std::vector<std::string> roomMembers(const std::string &room_id);
//! Check if the given user has power leve greater than than
//! lowest power level of the given events.
bool hasEnoughPowerLevel(const std::vector<mtx::events::EventType> &eventTypes,
const std::string &room_id,
const std::string &user_id);
//! Retrieves the saved room avatar.
QImage getRoomAvatar(const QString &id);
QImage getRoomAvatar(const std::string &id);
//! Adds a user to the read list for the given event.
//!
//! There should be only one user id present in a receipt list per room.
//! The user id should be removed from any other lists.
using Receipts = std::map<std::string, std::map<std::string, uint64_t>>;
void updateReadReceipt(lmdb::txn &txn,
const std::string &room_id,
const Receipts &receipts);
//! Retrieve all the read receipts for the given event id and room.
//!
//! Returns a map of user ids and the time of the read receipt in milliseconds.
using UserReceipts = std::multimap<uint64_t, std::string, std::greater<uint64_t>>;
UserReceipts readReceipts(const QString &event_id, const QString &room_id);
QByteArray image(const QString &url) const;
QByteArray image(lmdb::txn &txn, const std::string &url) const;
void saveImage(const std::string &url, const std::string &data);
void saveImage(const QString &url, const QByteArray &data);
RoomInfo singleRoomInfo(const std::string &room_id);
std::vector<std::string> roomsWithStateUpdates(const mtx::responses::Sync &res);
std::vector<std::string> roomsWithTagUpdates(const mtx::responses::Sync &res);
std::map<QString, RoomInfo> getRoomInfo(const std::vector<std::string> &rooms);
//! Calculates which the read status of a room.
//! Whether all the events in the timeline have been read.
bool calculateRoomReadStatus(const std::string &room_id);
void calculateRoomReadStatus();
std::vector<SearchResult> searchUsers(const std::string &room_id,
const std::string &query,
std::uint8_t max_items = 5);
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std::vector<RoomSearchResult> searchRooms(const std::string &query,
std::uint8_t max_items = 5);
void markSentNotification(const std::string &event_id);
//! Removes an event from the sent notifications.
void removeReadNotification(const std::string &event_id);
//! Check if we have sent a desktop notification for the given event id.
bool isNotificationSent(const std::string &event_id);
//! Add all notifications containing a user mention to the db.
void saveTimelineMentions(const mtx::responses::Notifications &res);
//! Remove old unused data.
void deleteOldMessages();
void deleteOldData() noexcept;
//! Retrieve all saved room ids.
std::vector<std::string> getRoomIds(lmdb::txn &txn);
//! Mark a room that uses e2e encryption.
void setEncryptedRoom(lmdb::txn &txn, const std::string &room_id);
bool isRoomEncrypted(const std::string &room_id);
//! Check if a user is a member of the room.
bool isRoomMember(const std::string &user_id, const std::string &room_id);
//
// Outbound Megolm Sessions
//
void saveOutboundMegolmSession(const std::string &room_id,
const OutboundGroupSessionData &data,
mtx::crypto::OutboundGroupSessionPtr session);
OutboundGroupSessionDataRef getOutboundMegolmSession(const std::string &room_id);
bool outboundMegolmSessionExists(const std::string &room_id) noexcept;
void updateOutboundMegolmSession(const std::string &room_id, int message_index);
void importSessionKeys(const mtx::crypto::ExportedSessionKeys &keys);
mtx::crypto::ExportedSessionKeys exportSessionKeys();
//
// Inbound Megolm Sessions
//
void saveInboundMegolmSession(const MegolmSessionIndex &index,
mtx::crypto::InboundGroupSessionPtr session);
OlmInboundGroupSession *getInboundMegolmSession(const MegolmSessionIndex &index);
bool inboundMegolmSessionExists(const MegolmSessionIndex &index);
//
// Olm Sessions
//
void saveOlmSession(const std::string &curve25519, mtx::crypto::OlmSessionPtr session);
std::vector<std::string> getOlmSessions(const std::string &curve25519);
std::optional<mtx::crypto::OlmSessionPtr> getOlmSession(const std::string &curve25519,
const std::string &session_id);
void saveOlmAccount(const std::string &pickled);
std::string restoreOlmAccount();
void restoreSessions();
signals:
void newReadReceipts(const QString &room_id, const std::vector<QString> &event_ids);
void roomReadStatus(const std::map<QString, bool> &status);
void removeNotification(const QString &room_id, const QString &event_id);
private:
//! Save an invited room.
void saveInvite(lmdb::txn &txn,
lmdb::dbi &statesdb,
lmdb::dbi &membersdb,
const mtx::responses::InvitedRoom &room);
//! Add a notification containing a user mention to the db.
void saveTimelineMentions(lmdb::txn &txn,
const std::string &room_id,
const QList<mtx::responses::Notification> &res);
//! Get timeline items that a user was mentions in for a given room
mtx::responses::Notifications getTimelineMentionsForRoom(lmdb::txn &txn,
const std::string &room_id);
QString getInviteRoomName(lmdb::txn &txn, lmdb::dbi &statesdb, lmdb::dbi &membersdb);
QString getInviteRoomTopic(lmdb::txn &txn, lmdb::dbi &statesdb);
QString getInviteRoomAvatarUrl(lmdb::txn &txn, lmdb::dbi &statesdb, lmdb::dbi &membersdb);
std::string getLastEventId(lmdb::txn &txn, const std::string &room_id);
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DescInfo getLastMessageInfo(lmdb::txn &txn, const std::string &room_id);
void saveTimelineMessages(lmdb::txn &txn,
const std::string &room_id,
const mtx::responses::Timeline &res);
mtx::responses::Timeline getTimelineMessages(lmdb::txn &txn, const std::string &room_id);
//! Remove a room from the cache.
// void removeLeftRoom(lmdb::txn &txn, const std::string &room_id);
template<class T>
void saveStateEvents(lmdb::txn &txn,
const lmdb::dbi &statesdb,
const lmdb::dbi &membersdb,
const std::string &room_id,
const std::vector<T> &events)
{
for (const auto &e : events)
saveStateEvent(txn, statesdb, membersdb, room_id, e);
}
template<class T>
void saveStateEvent(lmdb::txn &txn,
const lmdb::dbi &statesdb,
const lmdb::dbi &membersdb,
const std::string &room_id,
const T &event)
{
using namespace mtx::events;
using namespace mtx::events::state;
if (auto e = std::get_if<StateEvent<Member>>(&event); e != nullptr) {
switch (e->content.membership) {
//
// We only keep users with invite or join membership.
//
case Membership::Invite:
case Membership::Join: {
auto display_name = e->content.display_name.empty()
? e->state_key
: e->content.display_name;
// Lightweight representation of a member.
MemberInfo tmp{display_name, e->content.avatar_url};
lmdb::dbi_put(txn,
membersdb,
lmdb::val(e->state_key),
lmdb::val(json(tmp).dump()));
insertDisplayName(QString::fromStdString(room_id),
QString::fromStdString(e->state_key),
QString::fromStdString(display_name));
insertAvatarUrl(QString::fromStdString(room_id),
QString::fromStdString(e->state_key),
QString::fromStdString(e->content.avatar_url));
break;
}
default: {
lmdb::dbi_del(
txn, membersdb, lmdb::val(e->state_key), lmdb::val(""));
removeDisplayName(QString::fromStdString(room_id),
QString::fromStdString(e->state_key));
removeAvatarUrl(QString::fromStdString(room_id),
QString::fromStdString(e->state_key));
break;
}
}
return;
} else if (std::holds_alternative<StateEvent<Encryption>>(event)) {
setEncryptedRoom(txn, room_id);
return;
}
if (!isStateEvent(event))
return;
std::visit(
[&txn, &statesdb](auto e) {
lmdb::dbi_put(
txn, statesdb, lmdb::val(to_string(e.type)), lmdb::val(json(e).dump()));
},
event);
}
template<class T>
bool isStateEvent(const T &e)
{
using namespace mtx::events;
using namespace mtx::events::state;
return std::holds_alternative<StateEvent<Aliases>>(e) ||
std::holds_alternative<StateEvent<state::Avatar>>(e) ||
std::holds_alternative<StateEvent<CanonicalAlias>>(e) ||
std::holds_alternative<StateEvent<Create>>(e) ||
std::holds_alternative<StateEvent<GuestAccess>>(e) ||
std::holds_alternative<StateEvent<HistoryVisibility>>(e) ||
std::holds_alternative<StateEvent<JoinRules>>(e) ||
std::holds_alternative<StateEvent<Name>>(e) ||
std::holds_alternative<StateEvent<Member>>(e) ||
std::holds_alternative<StateEvent<PowerLevels>>(e) ||
std::holds_alternative<StateEvent<Topic>>(e);
}
template<class T>
bool containsStateUpdates(const T &e)
{
using namespace mtx::events;
using namespace mtx::events::state;
return std::holds_alternative<StateEvent<state::Avatar>>(e) ||
std::holds_alternative<StateEvent<CanonicalAlias>>(e) ||
std::holds_alternative<StateEvent<Name>>(e) ||
std::holds_alternative<StateEvent<Member>>(e) ||
std::holds_alternative<StateEvent<Topic>>(e);
}
bool containsStateUpdates(const mtx::events::collections::StrippedEvents &e)
{
using namespace mtx::events;
using namespace mtx::events::state;
return std::holds_alternative<StrippedEvent<state::Avatar>>(e) ||
std::holds_alternative<StrippedEvent<CanonicalAlias>>(e) ||
std::holds_alternative<StrippedEvent<Name>>(e) ||
std::holds_alternative<StrippedEvent<Member>>(e) ||
std::holds_alternative<StrippedEvent<Topic>>(e);
}
void saveInvites(lmdb::txn &txn,
const std::map<std::string, mtx::responses::InvitedRoom> &rooms);
//! Sends signals for the rooms that are removed.
void removeLeftRooms(lmdb::txn &txn,
const std::map<std::string, mtx::responses::LeftRoom> &rooms)
{
for (const auto &room : rooms) {
removeRoom(txn, room.first);
// Clean up leftover invites.
removeInvite(txn, room.first);
}
}
lmdb::dbi getPendingReceiptsDb(lmdb::txn &txn)
{
return lmdb::dbi::open(txn, "pending_receipts", MDB_CREATE);
}
lmdb::dbi getMessagesDb(lmdb::txn &txn, const std::string &room_id)
{
auto db =
lmdb::dbi::open(txn, std::string(room_id + "/messages").c_str(), MDB_CREATE);
lmdb::dbi_set_compare(txn, db, numeric_key_comparison);
return db;
}
lmdb::dbi getInviteStatesDb(lmdb::txn &txn, const std::string &room_id)
{
return lmdb::dbi::open(
txn, std::string(room_id + "/invite_state").c_str(), MDB_CREATE);
}
lmdb::dbi getInviteMembersDb(lmdb::txn &txn, const std::string &room_id)
{
return lmdb::dbi::open(
txn, std::string(room_id + "/invite_members").c_str(), MDB_CREATE);
}
lmdb::dbi getStatesDb(lmdb::txn &txn, const std::string &room_id)
{
return lmdb::dbi::open(txn, std::string(room_id + "/state").c_str(), MDB_CREATE);
}
lmdb::dbi getMembersDb(lmdb::txn &txn, const std::string &room_id)
{
return lmdb::dbi::open(txn, std::string(room_id + "/members").c_str(), MDB_CREATE);
}
lmdb::dbi getMentionsDb(lmdb::txn &txn, const std::string &room_id)
{
return lmdb::dbi::open(txn, std::string(room_id + "/mentions").c_str(), MDB_CREATE);
}
//! Retrieves or creates the database that stores the open OLM sessions between our device
//! and the given curve25519 key which represents another device.
//!
//! Each entry is a map from the session_id to the pickled representation of the session.
lmdb::dbi getOlmSessionsDb(lmdb::txn &txn, const std::string &curve25519_key)
{
return lmdb::dbi::open(
txn, std::string("olm_sessions/" + curve25519_key).c_str(), MDB_CREATE);
}
QString getDisplayName(const mtx::events::StateEvent<mtx::events::state::Member> &event)
{
if (!event.content.display_name.empty())
return QString::fromStdString(event.content.display_name);
return QString::fromStdString(event.state_key);
}
void setNextBatchToken(lmdb::txn &txn, const std::string &token);
void setNextBatchToken(lmdb::txn &txn, const QString &token);
lmdb::env env_;
lmdb::dbi syncStateDb_;
lmdb::dbi roomsDb_;
lmdb::dbi invitesDb_;
lmdb::dbi mediaDb_;
lmdb::dbi readReceiptsDb_;
lmdb::dbi notificationsDb_;
lmdb::dbi devicesDb_;
lmdb::dbi deviceKeysDb_;
lmdb::dbi inboundMegolmSessionDb_;
lmdb::dbi outboundMegolmSessionDb_;
QString localUserId_;
QString cacheDirectory_;
static QHash<QString, QString> DisplayNames;
static QHash<QString, QString> AvatarUrls;
OlmSessionStorage session_storage;
};
namespace cache {
Cache *
client();
}