matrixion/src/timeline/EventStore.cpp
2021-02-09 20:22:49 +01:00

858 lines
37 KiB
C++

#include "EventStore.h"
#include <QThread>
#include <QTimer>
#include <mtx/responses/common.hpp>
#include "Cache.h"
#include "Cache_p.h"
#include "ChatPage.h"
#include "EventAccessors.h"
#include "Logging.h"
#include "MatrixClient.h"
#include "Olm.h"
#include "Utils.h"
Q_DECLARE_METATYPE(Reaction)
QCache<EventStore::IdIndex, mtx::events::collections::TimelineEvents> EventStore::decryptedEvents_{
1000};
QCache<EventStore::IdIndex, mtx::events::collections::TimelineEvents> EventStore::events_by_id_{
1000};
QCache<EventStore::Index, mtx::events::collections::TimelineEvents> EventStore::events_{1000};
EventStore::EventStore(std::string room_id, QObject *)
: room_id_(std::move(room_id))
{
static auto reactionType = qRegisterMetaType<Reaction>();
(void)reactionType;
auto range = cache::client()->getTimelineRange(room_id_);
if (range) {
this->first = range->first;
this->last = range->last;
}
connect(
this,
&EventStore::eventFetched,
this,
[this](std::string id,
std::string relatedTo,
mtx::events::collections::TimelineEvents timeline) {
cache::client()->storeEvent(room_id_, id, {timeline});
if (!relatedTo.empty()) {
auto idx = idToIndex(relatedTo);
if (idx)
emit dataChanged(*idx, *idx);
}
},
Qt::QueuedConnection);
connect(
this,
&EventStore::oldMessagesRetrieved,
this,
[this](const mtx::responses::Messages &res) {
if (cache::client()->previousBatchToken(room_id_) == res.end) {
noMoreMessages = true;
emit fetchedMore();
return;
}
uint64_t newFirst = cache::client()->saveOldMessages(room_id_, res);
if (newFirst == first)
fetchMore();
else {
if (this->last != std::numeric_limits<uint64_t>::max()) {
emit beginInsertRows(toExternalIdx(newFirst),
toExternalIdx(this->first - 1));
this->first = newFirst;
emit endInsertRows();
emit fetchedMore();
} else {
auto range = cache::client()->getTimelineRange(room_id_);
if (range && range->last - range->first != 0) {
emit beginInsertRows(0, int(range->last - range->first));
this->first = range->first;
this->last = range->last;
emit endInsertRows();
emit fetchedMore();
} else {
fetchMore();
}
}
}
},
Qt::QueuedConnection);
connect(this, &EventStore::processPending, this, [this]() {
if (!current_txn.empty()) {
nhlog::ui()->debug("Already processing {}", current_txn);
return;
}
auto event = cache::client()->firstPendingMessage(room_id_);
if (!event) {
nhlog::ui()->debug("No event to send");
return;
}
std::visit(
[this](auto e) {
auto txn_id = e.event_id;
this->current_txn = txn_id;
if (txn_id.empty() || txn_id[0] != 'm') {
nhlog::ui()->debug("Invalid txn id '{}'", txn_id);
cache::client()->removePendingStatus(room_id_, txn_id);
return;
}
if constexpr (mtx::events::message_content_to_type<decltype(e.content)> !=
mtx::events::EventType::Unsupported)
http::client()->send_room_message(
room_id_,
txn_id,
e.content,
[this, txn_id, e](const mtx::responses::EventId &event_id,
mtx::http::RequestErr err) {
if (err) {
const int status_code =
static_cast<int>(err->status_code);
nhlog::net()->warn(
"[{}] failed to send message: {} {}",
txn_id,
err->matrix_error.error,
status_code);
emit messageFailed(txn_id);
return;
}
emit messageSent(txn_id, event_id.event_id.to_string());
if constexpr (std::is_same_v<
decltype(e.content),
mtx::events::msg::Encrypted>) {
auto event =
decryptEvent({room_id_, e.event_id}, e);
if (auto dec =
std::get_if<mtx::events::RoomEvent<
mtx::events::msg::
KeyVerificationRequest>>(event)) {
emit updateFlowEventId(
event_id.event_id.to_string());
}
}
});
},
event->data);
});
connect(
this,
&EventStore::messageFailed,
this,
[this](std::string txn_id) {
if (current_txn == txn_id) {
current_txn_error_count++;
if (current_txn_error_count > 10) {
nhlog::ui()->debug("failing txn id '{}'", txn_id);
cache::client()->removePendingStatus(room_id_, txn_id);
current_txn_error_count = 0;
}
}
QTimer::singleShot(1000, this, [this]() {
nhlog::ui()->debug("timeout");
this->current_txn = "";
emit processPending();
});
},
Qt::QueuedConnection);
connect(
this,
&EventStore::messageSent,
this,
[this](std::string txn_id, std::string event_id) {
nhlog::ui()->debug("sent {}", txn_id);
http::client()->read_event(
room_id_, event_id, [this, event_id](mtx::http::RequestErr err) {
if (err) {
nhlog::net()->warn(
"failed to read_event ({}, {})", room_id_, event_id);
}
});
cache::client()->removePendingStatus(room_id_, txn_id);
this->current_txn = "";
this->current_txn_error_count = 0;
emit processPending();
},
Qt::QueuedConnection);
}
void
EventStore::addPending(mtx::events::collections::TimelineEvents event)
{
if (this->thread() != QThread::currentThread())
nhlog::db()->warn("{} called from a different thread!", __func__);
cache::client()->savePendingMessage(this->room_id_, {event});
mtx::responses::Timeline events;
events.limited = false;
events.events.emplace_back(event);
handleSync(events);
emit processPending();
}
void
EventStore::clearTimeline()
{
emit beginResetModel();
cache::client()->clearTimeline(room_id_);
auto range = cache::client()->getTimelineRange(room_id_);
if (range) {
nhlog::db()->info("Range {} {}", range->last, range->first);
this->last = range->last;
this->first = range->first;
} else {
this->first = std::numeric_limits<uint64_t>::max();
this->last = std::numeric_limits<uint64_t>::max();
}
nhlog::ui()->info("Range {} {}", this->last, this->first);
decryptedEvents_.clear();
events_.clear();
emit endResetModel();
}
void
EventStore::receivedSessionKey(const std::string &session_id)
{
if (!pending_key_requests.count(session_id))
return;
auto request = pending_key_requests.at(session_id);
// Don't request keys again until Nheko is restarted (for now)
pending_key_requests[session_id].events.clear();
if (!request.events.empty())
olm::send_key_request_for(request.events.front(), request.request_id, true);
for (const auto &e : request.events) {
auto idx = idToIndex(e.event_id);
if (idx) {
decryptedEvents_.remove({room_id_, e.event_id});
events_by_id_.remove({room_id_, e.event_id});
events_.remove({room_id_, toInternalIdx(*idx)});
emit dataChanged(*idx, *idx);
}
}
}
void
EventStore::handleSync(const mtx::responses::Timeline &events)
{
if (this->thread() != QThread::currentThread())
nhlog::db()->warn("{} called from a different thread!", __func__);
auto range = cache::client()->getTimelineRange(room_id_);
if (!range) {
emit beginResetModel();
this->first = std::numeric_limits<uint64_t>::max();
this->last = std::numeric_limits<uint64_t>::max();
decryptedEvents_.clear();
events_.clear();
emit endResetModel();
return;
}
if (events.limited) {
emit beginResetModel();
this->last = range->last;
this->first = range->first;
decryptedEvents_.clear();
events_.clear();
emit endResetModel();
} else if (range->last > this->last) {
emit beginInsertRows(toExternalIdx(this->last + 1), toExternalIdx(range->last));
this->last = range->last;
emit endInsertRows();
}
for (const auto &event : events.events) {
std::set<std::string> relates_to;
if (auto redaction =
std::get_if<mtx::events::RedactionEvent<mtx::events::msg::Redaction>>(
&event)) {
// fixup reactions
auto redacted = events_by_id_.object({room_id_, redaction->redacts});
if (redacted) {
auto id = mtx::accessors::relations(*redacted);
if (id.annotates()) {
auto idx = idToIndex(id.annotates()->event_id);
if (idx) {
events_by_id_.remove(
{room_id_, redaction->redacts});
events_.remove({room_id_, toInternalIdx(*idx)});
emit dataChanged(*idx, *idx);
}
}
}
relates_to.insert(redaction->redacts);
} else {
for (const auto &r : mtx::accessors::relations(event).relations)
relates_to.insert(r.event_id);
}
for (const auto &relates_to_id : relates_to) {
auto idx = cache::client()->getTimelineIndex(room_id_, relates_to_id);
if (idx) {
events_by_id_.remove({room_id_, relates_to_id});
decryptedEvents_.remove({room_id_, relates_to_id});
events_.remove({room_id_, *idx});
emit dataChanged(toExternalIdx(*idx), toExternalIdx(*idx));
}
}
if (auto txn_id = mtx::accessors::transaction_id(event); !txn_id.empty()) {
auto idx = cache::client()->getTimelineIndex(
room_id_, mtx::accessors::event_id(event));
if (idx) {
Index index{room_id_, *idx};
events_.remove(index);
emit dataChanged(toExternalIdx(*idx), toExternalIdx(*idx));
}
}
// decrypting and checking some encrypted messages
if (auto encrypted =
std::get_if<mtx::events::EncryptedEvent<mtx::events::msg::Encrypted>>(
&event)) {
mtx::events::collections::TimelineEvents *d_event =
decryptEvent({room_id_, encrypted->event_id}, *encrypted);
if (std::visit(
[](auto e) { return (e.sender != utils::localUser().toStdString()); },
*d_event)) {
handle_room_verification(*d_event);
}
}
}
}
namespace {
template<class... Ts>
struct overloaded : Ts...
{
using Ts::operator()...;
};
template<class... Ts>
overloaded(Ts...) -> overloaded<Ts...>;
}
void
EventStore::handle_room_verification(mtx::events::collections::TimelineEvents event)
{
std::visit(
overloaded{
[this](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationRequest> &msg) {
nhlog::db()->debug("handle_room_verification: Request");
emit startDMVerification(msg);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationCancel> &msg) {
nhlog::db()->debug("handle_room_verification: Cancel");
ChatPage::instance()->receivedDeviceVerificationCancel(msg.content);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationAccept> &msg) {
nhlog::db()->debug("handle_room_verification: Accept");
ChatPage::instance()->receivedDeviceVerificationAccept(msg.content);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationKey> &msg) {
nhlog::db()->debug("handle_room_verification: Key");
ChatPage::instance()->receivedDeviceVerificationKey(msg.content);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationMac> &msg) {
nhlog::db()->debug("handle_room_verification: Mac");
ChatPage::instance()->receivedDeviceVerificationMac(msg.content);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationReady> &msg) {
nhlog::db()->debug("handle_room_verification: Ready");
ChatPage::instance()->receivedDeviceVerificationReady(msg.content);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationDone> &msg) {
nhlog::db()->debug("handle_room_verification: Done");
ChatPage::instance()->receivedDeviceVerificationDone(msg.content);
},
[](const mtx::events::RoomEvent<mtx::events::msg::KeyVerificationStart> &msg) {
nhlog::db()->debug("handle_room_verification: Start");
ChatPage::instance()->receivedDeviceVerificationStart(msg.content, msg.sender);
},
[](const auto &) {},
},
event);
}
std::vector<mtx::events::collections::TimelineEvents>
EventStore::edits(const std::string &event_id)
{
auto event_ids = cache::client()->relatedEvents(room_id_, event_id);
auto original_event = get(event_id, "", false, false);
if (!original_event)
return {};
auto original_sender = mtx::accessors::sender(*original_event);
auto original_relations = mtx::accessors::relations(*original_event);
std::vector<mtx::events::collections::TimelineEvents> edits;
for (const auto &id : event_ids) {
auto related_event = get(id, event_id, false, false);
if (!related_event)
continue;
auto related_ev = *related_event;
auto edit_rel = mtx::accessors::relations(related_ev);
if (edit_rel.replaces() == event_id &&
original_sender == mtx::accessors::sender(related_ev)) {
if (edit_rel.synthesized && original_relations.reply_to() &&
!edit_rel.reply_to()) {
edit_rel.relations.push_back(
{mtx::common::RelationType::InReplyTo,
original_relations.reply_to().value()});
mtx::accessors::set_relations(related_ev, std::move(edit_rel));
}
edits.push_back(std::move(related_ev));
}
}
auto c = cache::client();
std::sort(edits.begin(),
edits.end(),
[this, c](const mtx::events::collections::TimelineEvents &a,
const mtx::events::collections::TimelineEvents &b) {
return c->getArrivalIndex(this->room_id_, mtx::accessors::event_id(a)) <
c->getArrivalIndex(this->room_id_, mtx::accessors::event_id(b));
});
return edits;
}
QVariantList
EventStore::reactions(const std::string &event_id)
{
auto event_ids = cache::client()->relatedEvents(room_id_, event_id);
struct TempReaction
{
int count = 0;
std::vector<std::string> users;
std::string reactedBySelf;
};
std::map<std::string, TempReaction> aggregation;
std::vector<Reaction> reactions;
auto self = http::client()->user_id().to_string();
for (const auto &id : event_ids) {
auto related_event = get(id, event_id);
if (!related_event)
continue;
if (auto reaction = std::get_if<mtx::events::RoomEvent<mtx::events::msg::Reaction>>(
related_event);
reaction && reaction->content.relations.annotates() &&
reaction->content.relations.annotates()->key) {
auto key = reaction->content.relations.annotates()->key.value();
auto &agg = aggregation[key];
if (agg.count == 0) {
Reaction temp{};
temp.key_ = QString::fromStdString(key);
reactions.push_back(temp);
}
agg.count++;
agg.users.push_back(cache::displayName(room_id_, reaction->sender));
if (reaction->sender == self)
agg.reactedBySelf = reaction->event_id;
}
}
QVariantList temp;
for (auto &reaction : reactions) {
const auto &agg = aggregation[reaction.key_.toStdString()];
reaction.count_ = agg.count;
reaction.selfReactedEvent_ = QString::fromStdString(agg.reactedBySelf);
bool firstReaction = true;
for (const auto &user : agg.users) {
if (firstReaction)
firstReaction = false;
else
reaction.users_ += ", ";
reaction.users_ += QString::fromStdString(user);
}
nhlog::db()->debug("key: {}, count: {}, users: {}",
reaction.key_.toStdString(),
reaction.count_,
reaction.users_.toStdString());
temp.append(QVariant::fromValue(reaction));
}
return temp;
}
mtx::events::collections::TimelineEvents *
EventStore::get(int idx, bool decrypt)
{
if (this->thread() != QThread::currentThread())
nhlog::db()->warn("{} called from a different thread!", __func__);
Index index{room_id_, toInternalIdx(idx)};
if (index.idx > last || index.idx < first)
return nullptr;
auto event_ptr = events_.object(index);
if (!event_ptr) {
auto event_id = cache::client()->getTimelineEventId(room_id_, index.idx);
if (!event_id)
return nullptr;
std::optional<mtx::events::collections::TimelineEvent> event;
auto edits_ = edits(*event_id);
if (edits_.empty())
event = cache::client()->getEvent(room_id_, *event_id);
else
event = {edits_.back()};
if (!event)
return nullptr;
else
event_ptr =
new mtx::events::collections::TimelineEvents(std::move(event->data));
events_.insert(index, event_ptr);
}
if (decrypt)
if (auto encrypted =
std::get_if<mtx::events::EncryptedEvent<mtx::events::msg::Encrypted>>(
event_ptr))
return decryptEvent({room_id_, encrypted->event_id}, *encrypted);
return event_ptr;
}
std::optional<int>
EventStore::idToIndex(std::string_view id) const
{
if (this->thread() != QThread::currentThread())
nhlog::db()->warn("{} called from a different thread!", __func__);
auto idx = cache::client()->getTimelineIndex(room_id_, id);
if (idx)
return toExternalIdx(*idx);
else
return std::nullopt;
}
std::optional<std::string>
EventStore::indexToId(int idx) const
{
if (this->thread() != QThread::currentThread())
nhlog::db()->warn("{} called from a different thread!", __func__);
return cache::client()->getTimelineEventId(room_id_, toInternalIdx(idx));
}
mtx::events::collections::TimelineEvents *
EventStore::decryptEvent(const IdIndex &idx,
const mtx::events::EncryptedEvent<mtx::events::msg::Encrypted> &e)
{
if (auto cachedEvent = decryptedEvents_.object(idx))
return cachedEvent;
MegolmSessionIndex index;
index.room_id = room_id_;
index.session_id = e.content.session_id;
index.sender_key = e.content.sender_key;
auto asCacheEntry = [&idx](mtx::events::collections::TimelineEvents &&event) {
auto event_ptr = new mtx::events::collections::TimelineEvents(std::move(event));
decryptedEvents_.insert(idx, event_ptr);
return event_ptr;
};
auto decryptionResult = olm::decryptEvent(index, e);
mtx::events::RoomEvent<mtx::events::msg::Notice> dummy;
dummy.origin_server_ts = e.origin_server_ts;
dummy.event_id = e.event_id;
dummy.sender = e.sender;
if (decryptionResult.error) {
switch (*decryptionResult.error) {
case olm::DecryptionErrorCode::MissingSession:
case olm::DecryptionErrorCode::MissingSessionIndex: {
if (decryptionResult.error == olm::DecryptionErrorCode::MissingSession)
dummy.content.body =
tr("-- Encrypted Event (No keys found for decryption) --",
"Placeholder, when the message was not decrypted yet or can't "
"be "
"decrypted.")
.toStdString();
else
dummy.content.body =
tr("-- Encrypted Event (Key not valid for this index) --",
"Placeholder, when the message can't be decrypted with this "
"key since it is not valid for this index ")
.toStdString();
nhlog::crypto()->info("Could not find inbound megolm session ({}, {}, {})",
index.room_id,
index.session_id,
e.sender);
// TODO: Check if this actually works and look in key backup
auto copy = e;
copy.room_id = room_id_;
if (pending_key_requests.count(e.content.session_id)) {
pending_key_requests.at(e.content.session_id)
.events.push_back(copy);
} else {
PendingKeyRequests request;
request.request_id =
"key_request." + http::client()->generate_txn_id();
request.events.push_back(copy);
olm::send_key_request_for(copy, request.request_id);
pending_key_requests[e.content.session_id] = request;
}
break;
}
case olm::DecryptionErrorCode::DbError:
nhlog::db()->critical(
"failed to retrieve megolm session with index ({}, {}, {})",
index.room_id,
index.session_id,
index.sender_key,
decryptionResult.error_message.value_or(""));
dummy.content.body =
tr("-- Decryption Error (failed to retrieve megolm keys from db) --",
"Placeholder, when the message can't be decrypted, because the DB "
"access "
"failed.")
.toStdString();
break;
case olm::DecryptionErrorCode::DecryptionFailed:
nhlog::crypto()->critical(
"failed to decrypt message with index ({}, {}, {}): {}",
index.room_id,
index.session_id,
index.sender_key,
decryptionResult.error_message.value_or(""));
dummy.content.body =
tr("-- Decryption Error (%1) --",
"Placeholder, when the message can't be decrypted. In this case, the "
"Olm "
"decrytion returned an error, which is passed as %1.")
.arg(
QString::fromStdString(decryptionResult.error_message.value_or("")))
.toStdString();
break;
case olm::DecryptionErrorCode::ParsingFailed:
dummy.content.body =
tr("-- Encrypted Event (Unknown event type) --",
"Placeholder, when the message was decrypted, but we couldn't parse "
"it, because "
"Nheko/mtxclient don't support that event type yet.")
.toStdString();
break;
case olm::DecryptionErrorCode::ReplayAttack:
nhlog::crypto()->critical(
"Reply attack while decryptiong event {} in room {} from {}!",
e.event_id,
room_id_,
index.sender_key);
dummy.content.body =
tr("-- Replay attack! This message index was reused! --").toStdString();
break;
case olm::DecryptionErrorCode::UnknownFingerprint:
// TODO: don't fail, just show in UI.
nhlog::crypto()->critical("Message by unverified fingerprint {}",
index.sender_key);
dummy.content.body =
tr("-- Message by unverified device! --").toStdString();
break;
}
return asCacheEntry(std::move(dummy));
}
std::string msg_str;
try {
auto session = cache::client()->getInboundMegolmSession(index);
auto res =
olm::client()->decrypt_group_message(session.get(), e.content.ciphertext);
msg_str = std::string((char *)res.data.data(), res.data.size());
} catch (const lmdb::error &e) {
nhlog::db()->critical("failed to retrieve megolm session with index ({}, {}, {})",
index.room_id,
index.session_id,
index.sender_key,
e.what());
dummy.content.body =
tr("-- Decryption Error (failed to retrieve megolm keys from db) --",
"Placeholder, when the message can't be decrypted, because the DB "
"access "
"failed.")
.toStdString();
return asCacheEntry(std::move(dummy));
} catch (const mtx::crypto::olm_exception &e) {
nhlog::crypto()->critical("failed to decrypt message with index ({}, {}, {}): {}",
index.room_id,
index.session_id,
index.sender_key,
e.what());
dummy.content.body =
tr("-- Decryption Error (%1) --",
"Placeholder, when the message can't be decrypted. In this case, the "
"Olm "
"decrytion returned an error, which is passed as %1.")
.arg(e.what())
.toStdString();
return asCacheEntry(std::move(dummy));
}
// Add missing fields for the event.
json body = json::parse(msg_str);
body["event_id"] = e.event_id;
body["sender"] = e.sender;
body["origin_server_ts"] = e.origin_server_ts;
body["unsigned"] = e.unsigned_data;
// relations are unencrypted in content...
mtx::common::add_relations(body["content"], e.content.relations);
json event_array = json::array();
event_array.push_back(body);
std::vector<mtx::events::collections::TimelineEvents> temp_events;
mtx::responses::utils::parse_timeline_events(event_array, temp_events);
if (temp_events.size() == 1) {
auto encInfo = mtx::accessors::file(temp_events[0]);
if (encInfo)
emit newEncryptedImage(encInfo.value());
return asCacheEntry(std::move(temp_events[0]));
}
auto encInfo = mtx::accessors::file(decryptionResult.event.value());
if (encInfo)
emit newEncryptedImage(encInfo.value());
return asCacheEntry(std::move(decryptionResult.event.value()));
}
mtx::events::collections::TimelineEvents *
EventStore::get(std::string_view id, std::string_view related_to, bool decrypt, bool resolve_edits)
{
if (this->thread() != QThread::currentThread())
nhlog::db()->warn("{} called from a different thread!", __func__);
if (id.empty())
return nullptr;
IdIndex index{room_id_, std::string(id)};
if (resolve_edits) {
auto edits_ = edits(index.id);
if (!edits_.empty()) {
index.id = mtx::accessors::event_id(edits_.back());
auto event_ptr =
new mtx::events::collections::TimelineEvents(std::move(edits_.back()));
events_by_id_.insert(index, event_ptr);
}
}
auto event_ptr = events_by_id_.object(index);
if (!event_ptr) {
auto event = cache::client()->getEvent(room_id_, index.id);
if (!event) {
http::client()->get_event(
room_id_,
index.id,
[this,
relatedTo = std::string(related_to.data(), related_to.size()),
id = index.id](const mtx::events::collections::TimelineEvents &timeline,
mtx::http::RequestErr err) {
if (err) {
nhlog::net()->error(
"Failed to retrieve event with id {}, which "
"was "
"requested to show the replyTo for event {}",
relatedTo,
id);
return;
}
emit eventFetched(id, relatedTo, timeline);
});
return nullptr;
}
event_ptr = new mtx::events::collections::TimelineEvents(std::move(event->data));
events_by_id_.insert(index, event_ptr);
}
if (decrypt)
if (auto encrypted =
std::get_if<mtx::events::EncryptedEvent<mtx::events::msg::Encrypted>>(
event_ptr))
return decryptEvent(index, *encrypted);
return event_ptr;
}
void
EventStore::fetchMore()
{
if (noMoreMessages)
return;
mtx::http::MessagesOpts opts;
opts.room_id = room_id_;
opts.from = cache::client()->previousBatchToken(room_id_);
nhlog::ui()->debug("Paginating room {}, token {}", opts.room_id, opts.from);
http::client()->messages(
opts, [this, opts](const mtx::responses::Messages &res, mtx::http::RequestErr err) {
if (cache::client()->previousBatchToken(room_id_) != opts.from) {
nhlog::net()->warn("Cache cleared while fetching more messages, dropping "
"/messages response");
if (!opts.to.empty())
emit fetchedMore();
return;
}
if (err) {
nhlog::net()->error("failed to call /messages ({}): {} - {} - {}",
opts.room_id,
mtx::errors::to_string(err->matrix_error.errcode),
err->matrix_error.error,
err->parse_error);
emit fetchedMore();
return;
}
emit oldMessagesRetrieved(std::move(res));
});
}