128 lines
3.1 KiB
C++
128 lines
3.1 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "observer_peer.h"
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#include "base/observer.h"
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namespace Notify {
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namespace {
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using SmallUpdatesList = QVector<PeerUpdate>;
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NeverFreedPointer<SmallUpdatesList> SmallUpdates;
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using AllUpdatesList = QMap<PeerData*, PeerUpdate>;
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NeverFreedPointer<AllUpdatesList> AllUpdates;
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void StartCallback() {
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SmallUpdates.createIfNull();
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AllUpdates.createIfNull();
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}
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void FinishCallback() {
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SmallUpdates.clear();
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AllUpdates.clear();
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}
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base::Observable<PeerUpdate, PeerUpdatedHandler> PeerUpdatedObservable;
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} // namespace
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void mergePeerUpdate(PeerUpdate &mergeTo, const PeerUpdate &mergeFrom) {
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if (!(mergeTo.flags & PeerUpdate::Flag::NameChanged)) {
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if (mergeFrom.flags & PeerUpdate::Flag::NameChanged) {
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mergeTo.oldNameFirstLetters = mergeFrom.oldNameFirstLetters;
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}
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}
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mergeTo.flags |= mergeFrom.flags;
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}
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void peerUpdatedDelayed(const PeerUpdate &update) {
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SmallUpdates.createIfNull();
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AllUpdates.createIfNull();
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Global::RefHandleDelayedPeerUpdates().call();
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int existingUpdatesCount = SmallUpdates->size();
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for (int i = 0; i < existingUpdatesCount; ++i) {
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auto &existingUpdate = (*SmallUpdates)[i];
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if (existingUpdate.peer == update.peer) {
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mergePeerUpdate(existingUpdate, update);
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return;
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}
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}
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if (AllUpdates->isEmpty()) {
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if (existingUpdatesCount < 5) {
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SmallUpdates->push_back(update);
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} else {
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AllUpdates->insert(update.peer, update);
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}
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} else {
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auto it = AllUpdates->find(update.peer);
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if (it != AllUpdates->cend()) {
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mergePeerUpdate(it.value(), update);
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return;
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}
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AllUpdates->insert(update.peer, update);
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}
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}
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void peerUpdatedSendDelayed() {
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if (!SmallUpdates || !AllUpdates || SmallUpdates->empty()) return;
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auto smallList = base::take(*SmallUpdates);
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auto allList = base::take(*AllUpdates);
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for (auto &update : smallList) {
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PeerUpdated().notify(std::move(update), true);
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}
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for (auto &update : allList) {
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PeerUpdated().notify(std::move(update), true);
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}
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if (SmallUpdates->isEmpty()) {
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std::swap(smallList, *SmallUpdates);
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SmallUpdates->resize(0);
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}
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}
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base::Observable<PeerUpdate, PeerUpdatedHandler> &PeerUpdated() {
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return PeerUpdatedObservable;
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}
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rpl::producer<PeerUpdate> PeerUpdateViewer(
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PeerUpdate::Flags flags) {
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return [=](const auto &consumer) {
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auto lifetime = rpl::lifetime();
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lifetime.make_state<base::Subscription>(
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PeerUpdated().add_subscription({ flags, [=](
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const PeerUpdate &update) {
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consumer.put_next_copy(update);
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}}));
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return lifetime;
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};
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}
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rpl::producer<PeerUpdate> PeerUpdateViewer(
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not_null<PeerData*> peer,
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PeerUpdate::Flags flags) {
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return PeerUpdateViewer(
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flags
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) | rpl::filter([=](const PeerUpdate &update) {
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return (update.peer == peer);
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});
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}
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rpl::producer<PeerUpdate> PeerUpdateValue(
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not_null<PeerData*> peer,
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PeerUpdate::Flags flags) {
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auto initial = PeerUpdate(peer);
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initial.flags = flags;
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return rpl::single(
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initial
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) | rpl::then(PeerUpdateViewer(peer, flags));
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}
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} // namespace Notify
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