participants handled good in supergroups: auto-load in profiles, outdate when something changes

Telegram/SourceFiles/apiwrap.cpp

@@ -316,10 +316,11 @@ void ApiWrap::gotChatFull(PeerData *peer, const MTPmessages_ChatFull &result, mt
 		channel->about = qs(f.vabout);
 		int32 newCount = f.has_participants_count() ? f.vparticipants_count.v : 0;
 		if (newCount != channel->count) {
-			channel->count = newCount;
 			if (channel->isMegagroup() && !channel->mgInfo->lastParticipants.isEmpty()) {
-				requestLastParticipants(channel);
+				channel->mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsCountOutdated;
+				channel->mgInfo->lastParticipantsCount = channel->count;
 			}
+			channel->count = newCount;
 		}
 		channel->adminsCount = f.has_admins_count() ? f.vadmins_count.v : 0;
 		channel->invitationUrl = (f.vexported_invite.type() == mtpc_chatInviteExported) ? qs(f.vexported_invite.c_chatInviteExported().vlink) : QString();
@@ -421,11 +422,24 @@ void ApiWrap::requestPeers(const QList<PeerData*> &peers) {
 	if (!users.isEmpty()) MTP::send(MTPusers_GetUsers(MTP_vector<MTPInputUser>(users)), rpcDone(&ApiWrap::gotUsers));
 }
 
-void ApiWrap::requestLastParticipants(ChannelData *peer) {
+void ApiWrap::requestLastParticipants(ChannelData *peer, bool fromStart) {
-	if (!peer || !peer->isMegagroup() || _participantsRequests.contains(peer)) return;
+	if (!peer || !peer->isMegagroup()) return;
-	mtpRequestId req = MTP::send(MTPchannels_GetParticipants(peer->inputChannel, MTP_channelParticipantsRecent(), MTP_int(0), MTP_int(cMaxGroupCount())), rpcDone(&ApiWrap::lastParticipantsDone, peer), rpcFail(&ApiWrap::lastParticipantsFail, peer));
+	if ((peer->mgInfo->lastParticipantsStatus & MegagroupInfo::LastParticipantsAdminsOutdated) || peer->lastParticipantsCountOutdated()) {
-	_participantsRequests.insert(peer, req);
+		fromStart = true;
-	MTP::send(MTPchannels_GetParticipants(peer->inputChannel, MTP_channelParticipantsBots(), MTP_int(0), MTP_int(cMaxGroupCount())), rpcDone(&ApiWrap::lastParticipantsDone, peer), rpcFail(&ApiWrap::lastParticipantsFail, peer));
+	}
+	QMap<PeerData*, mtpRequestId>::iterator i = _participantsRequests.find(peer);
+	if (i != _participantsRequests.cend()) {
+		if (fromStart && i.value() < 0) { // was not loading from start
+			_participantsRequests.erase(i);
+		} else {
+			return;
+		}
+	}
+	mtpRequestId req = MTP::send(MTPchannels_GetParticipants(peer->inputChannel, MTP_channelParticipantsRecent(), MTP_int(fromStart ? 0 : peer->mgInfo->lastParticipants.size()), MTP_int(1)), rpcDone(&ApiWrap::lastParticipantsDone, peer), rpcFail(&ApiWrap::lastParticipantsFail, peer));
+	_participantsRequests.insert(peer, fromStart ? req : -req);
+	if (fromStart) {
+		_botsRequests.insert(peer, MTP::send(MTPchannels_GetParticipants(peer->inputChannel, MTP_channelParticipantsBots(), MTP_int(0), MTP_int(cMaxGroupCount())), rpcDone(&ApiWrap::lastParticipantsDone, peer), rpcFail(&ApiWrap::lastParticipantsFail, peer)));
+	}
 }
 
 void ApiWrap::gotChat(PeerData *peer, const MTPmessages_Chats &result) {
@@ -477,60 +491,80 @@ bool ApiWrap::gotPeerFailed(PeerData *peer, const RPCError &error) {
 }
 
 void ApiWrap::lastParticipantsDone(ChannelData *peer, const MTPchannels_ChannelParticipants &result, mtpRequestId req) {
-	bool bots = (_participantsRequests.value(peer) != req);
+	bool bots = (_botsRequests.value(peer) == req), fromStart = false;
-
+	if (bots) {
-	if (!bots) {
+		_botsRequests.remove(peer);
+	} else {
+		int32 was = _participantsRequests.value(peer);
+		if (was == req) {
+			fromStart = true;
+		} else if (was != -req) {
+			return;
+		}
 		_participantsRequests.remove(peer);
 	}
-	if (!peer->mgInfo) return;
 
-	if (result.type() == mtpc_channels_channelParticipants) {
+	if (!peer->mgInfo || result.type() != mtpc_channels_channelParticipants) return;
-		const MTPDchannels_channelParticipants &d(result.c_channels_channelParticipants());
+
-		const QVector<MTPChannelParticipant> &v(d.vparticipants.c_vector().v);
+	if (bots) {
-		App::feedUsers(d.vusers);
+		peer->mgInfo->bots.clear();
-		int32 botStatus = peer->mgInfo->botStatus;
+		peer->mgInfo->botStatus = -1;
-		if (bots) {
+	} else if (fromStart) {
-			peer->mgInfo->bots.clear();
+		peer->mgInfo->lastAdmins.clear();
-			botStatus = -1;
+		peer->mgInfo->lastParticipants.clear();
-		} else {
+		peer->mgInfo->lastParticipantsStatus = MegagroupInfo::LastParticipantsUpToDate;
-			peer->mgInfo->lastParticipants.clear();
+	}
-			peer->mgInfo->lastAdmins.clear();
+
+	const MTPDchannels_channelParticipants &d(result.c_channels_channelParticipants());
+	const QVector<MTPChannelParticipant> &v(d.vparticipants.c_vector().v);
+	App::feedUsers(d.vusers);
+	bool added = false;
+	int32 botStatus = peer->mgInfo->botStatus;
+	for (QVector<MTPChannelParticipant>::const_iterator i = v.cbegin(), e = v.cend(); i != e; ++i) {
+		int32 userId = 0;
+		bool admin = false;
+
+		switch (i->type()) {
+		case mtpc_channelParticipant: userId = i->c_channelParticipant().vuser_id.v; break;
+		case mtpc_channelParticipantSelf: userId = i->c_channelParticipantSelf().vuser_id.v; break;
+		case mtpc_channelParticipantModerator: userId = i->c_channelParticipantModerator().vuser_id.v; break;
+		case mtpc_channelParticipantEditor: userId = i->c_channelParticipantEditor().vuser_id.v; admin = true; break;
+		case mtpc_channelParticipantKicked: userId = i->c_channelParticipantKicked().vuser_id.v; break;
+		case mtpc_channelParticipantCreator: userId = i->c_channelParticipantCreator().vuser_id.v; admin = true; break;
 		}
-		for (QVector<MTPChannelParticipant>::const_iterator i = v.cbegin(), e = v.cend(); i != e; ++i) {
+		UserData *u = App::user(userId);
-			int32 userId = 0;
+		if (bots) {
-			bool admin = false;
+			if (u->botInfo) {
-
+				peer->mgInfo->bots.insert(u, true);
-			switch (i->type()) {
+				botStatus = (botStatus > 0/* || i.key()->botInfo->readsAllHistory*/) ? 2 : 1;
-			case mtpc_channelParticipant: userId = i->c_channelParticipant().vuser_id.v; break;
-			case mtpc_channelParticipantSelf: userId = i->c_channelParticipantSelf().vuser_id.v; break;
-			case mtpc_channelParticipantModerator: userId = i->c_channelParticipantModerator().vuser_id.v; break;
-			case mtpc_channelParticipantEditor: userId = i->c_channelParticipantEditor().vuser_id.v; admin = true; break;
-			case mtpc_channelParticipantKicked: userId = i->c_channelParticipantKicked().vuser_id.v; break;
-			case mtpc_channelParticipantCreator: userId = i->c_channelParticipantCreator().vuser_id.v; admin = true; break;
 			}
-			UserData *u = App::user(userId);
+		} else {
-			if (bots) {
+			if (peer->mgInfo->lastParticipants.indexOf(u) < 0) {
-				if (u->botInfo) {
-					peer->mgInfo->bots.insert(u, true);
-					botStatus = (botStatus > 0/* || i.key()->botInfo->readsAllHistory*/) ? 2 : 1;
-				}
-			} else {
 				peer->mgInfo->lastParticipants.push_back(u);
 				if (admin) peer->mgInfo->lastAdmins.insert(u, true);
+				added = true;
 			}
 		}
-		if (d.vcount.v > peer->count) {
-			peer->count = d.vcount.v;
-		} else if (v.count() > peer->count) {
-			peer->count = v.count();
-		}
-		if (App::main()) emit fullPeerUpdated(peer);
 	}
+	if (d.vcount.v > peer->count) {
+		peer->count = d.vcount.v;
+	} else if (v.count() > peer->count) {
+		peer->count = v.count();
+	}
+	if (!bots && v.isEmpty()) {
+		peer->count = peer->mgInfo->lastParticipants.size();
+	}
+	peer->mgInfo->botStatus = botStatus;
+	if (App::main()) emit fullPeerUpdated(peer);
 }
 
-bool ApiWrap::lastParticipantsFail(ChannelData *peer, const RPCError &error) {
+bool ApiWrap::lastParticipantsFail(ChannelData *peer, const RPCError &error, mtpRequestId req) {
 	if (mtpIsFlood(error)) return false;
-	_participantsRequests.remove(peer);
+	if (_participantsRequests.value(peer) == req || _participantsRequests.value(peer) == -req) {
+		_participantsRequests.remove(peer);
+	} else if (_botsRequests.value(peer) == req) {
+		_botsRequests.remove(peer);
+	}
 	return true;
 }
 
@@ -603,10 +637,13 @@ void ApiWrap::kickParticipantDone(KickRequest kick, const MTPUpdates &result, mt
 		if (i >= 0) {
 			kick.first->asChannel()->mgInfo->lastParticipants.removeAt(i);
 			kick.first->asChannel()->mgInfo->lastAdmins.remove(kick.second);
-			kick.first->asChannel()->mgInfo->bots.remove(kick.second);
 		}
+		kick.first->asChannel()->mgInfo->bots.remove(kick.second);
 		if (kick.first->asChannel()->count > 1) {
 			kick.first->asChannel()->count--;
+		} else {
+			kick.first->asChannel()->mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsCountOutdated;
+			kick.first->asChannel()->mgInfo->lastParticipantsCount = 0;
 		}
 	}
 	emit fullPeerUpdated(kick.first);

Telegram/SourceFiles/apiwrap.h

@@ -36,7 +36,7 @@ public:
 	void requestFullPeer(PeerData *peer);
 	void requestPeer(PeerData *peer);
 	void requestPeers(const QList<PeerData*> &peers);
-	void requestLastParticipants(ChannelData *peer);
+	void requestLastParticipants(ChannelData *peer, bool fromStart = true);
 
 	void processFullPeer(PeerData *peer, const MTPmessages_ChatFull &result);
 	void processFullPeer(PeerData *peer, const MTPUserFull &result);
@@ -96,8 +96,8 @@ private:
 	PeerRequests _peerRequests;
 
 	void lastParticipantsDone(ChannelData *peer, const MTPchannels_ChannelParticipants &result, mtpRequestId req);
-	bool lastParticipantsFail(ChannelData *peer, const RPCError &error);
+	bool lastParticipantsFail(ChannelData *peer, const RPCError &error, mtpRequestId req);
-	PeerRequests _participantsRequests;
+	PeerRequests _participantsRequests, _botsRequests;
 
 	typedef QPair<PeerData*, UserData*> KickRequest;
 	typedef QMap<KickRequest, mtpRequestId> KickRequests;

Telegram/SourceFiles/dialogswidget.cpp

@@ -1791,8 +1791,9 @@ void DialogsWidget::dialogsReceived(const MTPmessages_Dialogs &dialogs, mtpReque
 				peer = peerFromMTP(d.c_dialog().vpeer);
 			break;
 			case mtpc_dialogChannel:
-				msgId = d.c_dialogChannel().vtop_important_message.v;
+				//msgId = d.c_dialogChannel().vtop_important_message.v;
-				if (!msgId) msgId = d.c_dialogChannel().vtop_message.v;
+				//if (!msgId) msgId = d.c_dialogChannel().vtop_message.v;
+				msgId = d.c_dialogChannel().vtop_message.v;
 				peer = peerFromMTP(d.c_dialogChannel().vpeer);
 			break;
 			}
@@ -1802,7 +1803,7 @@ void DialogsWidget::dialogsReceived(const MTPmessages_Dialogs &dialogs, mtpReque
 					if (!lastMsgId) lastMsgId = msgId;
 					for (int32 j = m->size(); j > 0;) {
 						const MTPMessage &d(m->at(--j));
-						if (idFromMessage(d) == msgId) {
+						if (idFromMessage(d) == msgId && peerFromMessage(d) == peer) {
 							int32 date = dateFromMessage(d);
 							if (date) lastDate = date;
 							break;

Telegram/SourceFiles/dropdown.cpp

@@ -3006,7 +3006,7 @@ void MentionsDropdown::updateFiltered(bool toDown) {
 		}
 	} else if (_filter.at(0) == '@' && _channel && _channel->isMegagroup()) {
 		QMultiMap<int32, UserData*> ordered;
-		if (_channel->mgInfo->lastParticipants.isEmpty()) {
+		if (_channel->mgInfo->lastParticipants.isEmpty() || _channel->lastParticipantsCountOutdated()) {
 			if (App::api()) App::api()->requestLastParticipants(_channel);
 		} else {
 			rows.reserve(_channel->mgInfo->lastParticipants.size());

Telegram/SourceFiles/history.cpp

@@ -1482,12 +1482,26 @@ HistoryItem *History::createItem(HistoryBlock *block, const MTPMessage &msg, boo
 			switch (d.vaction.type()) {
 			case mtpc_messageActionChatAddUser: {
 				const MTPDmessageActionChatAddUser &d(action.c_messageActionChatAddUser());
-				// App::user(App::peerFromUser(d.vuser_id)); added
+				if (peer->isMegagroup()) {
+					peer->asChannel()->mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsAdminsOutdated;
+					const QVector<MTPint> &v(d.vusers.c_vector().v);
+					for (int32 i = 0, l = v.size(); i < l; ++i) {
+						if (UserData *user = App::userLoaded(peerFromUser(v.at(i)))) {
+							if (peer->asChannel()->mgInfo->lastParticipants.indexOf(user) < 0) {
+								peer->asChannel()->mgInfo->lastParticipants.push_front(user);
+							}
+						}
+					}
+				}
 			} break;
 
 			case mtpc_messageActionChatJoinedByLink: {
 				const MTPDmessageActionChatJoinedByLink &d(action.c_messageActionChatJoinedByLink());
-				// App::user(App::peerFromUser(d.vuser_id)); added
+				if (peer->isMegagroup()) {
+					if (result->from()->isUser() && peer->asChannel()->mgInfo->lastParticipants.indexOf(result->from()->asUser()) < 0) {
+						peer->asChannel()->mgInfo->lastParticipants.push_front(result->from()->asUser());
+					}
+				}
 			} break;
 
 			case mtpc_messageActionChatDeletePhoto: {
@@ -1731,8 +1745,9 @@ HistoryItem *History::addNewItem(HistoryBlock *to, bool newBlock, HistoryItem *a
 			QList<UserData*> *lastAuthors = 0;
 			if (peer->isChat()) {
 				lastAuthors = &peer->asChat()->lastAuthors;
-			} else if (peer->isMegagroup() && !peer->asChannel()->mgInfo->lastParticipants.isEmpty()) {
+			} else if (peer->isMegagroup()) {
 				lastAuthors = &peer->asChannel()->mgInfo->lastParticipants;
+				peer->asChannel()->mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsAdminsOutdated;
 			}
 			if (lastAuthors) {
 				int prev = lastAuthors->indexOf(adding->from()->asUser());
@@ -1948,29 +1963,28 @@ void History::addOlderSlice(const QVector<MTPMessage> &slice, const QVector<MTPM
 				lastAuthors = &peer->asChat()->lastAuthors;
 				markupSenders = &peer->asChat()->markupSenders;
 			} else if (peer->isMegagroup()) {
-				if (!peer->asChannel()->mgInfo->lastParticipants.isEmpty()) {
+				lastAuthors = &peer->asChannel()->mgInfo->lastParticipants;
-					lastAuthors = &peer->asChannel()->mgInfo->lastParticipants;
-				}
 				markupSenders = &peer->asChannel()->mgInfo->markupSenders;
+				peer->asChannel()->mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsAdminsOutdated;
 			}
 			for (int32 i = block->items.size(); i > 0; --i) {
 				HistoryItem *item = block->items[i - 1];
-				if (!item->indexInOverview()) continue;
+				if (item->indexInOverview()) {
-
+					HistoryMedia *media = item->getMedia(true);
-				HistoryMedia *media = item->getMedia(true);
+					if (media) {
-				if (media) {
+						HistoryMediaType mt = media->type();
-					HistoryMediaType mt = media->type();
+						MediaOverviewType t = mediaToOverviewType(mt);
-					MediaOverviewType t = mediaToOverviewType(mt);
+						if (t != OverviewCount) {
-					if (t != OverviewCount) {
+							if (mt == MediaTypeDocument && static_cast<HistoryDocument*>(media)->document()->song()) {
-						if (mt == MediaTypeDocument && static_cast<HistoryDocument*>(media)->document()->song()) {
+								if (addToOverviewFront(item, OverviewAudioDocuments)) mask |= (1 << OverviewAudioDocuments);
-							if (addToOverviewFront(item, OverviewAudioDocuments)) mask |= (1 << OverviewAudioDocuments);
+							} else {
-						} else {
+								if (addToOverviewFront(item, t)) mask |= (1 << t);
-							if (addToOverviewFront(item, t)) mask |= (1 << t);
+							}
 						}
 					}
-				}
+					if (item->hasTextLinks()) {
-				if (item->hasTextLinks()) {
+						if (addToOverviewFront(item, OverviewLinks)) mask |= (1 << OverviewLinks);
-					if (addToOverviewFront(item, OverviewLinks)) mask |= (1 << OverviewLinks);
+					}
 				}
 				if (item->from()->id) {
 					if (lastAuthors) { // chats

Telegram/SourceFiles/profilewidget.cpp

@@ -130,7 +130,7 @@ ProfileInner::ProfileInner(ProfileWidget *profile, ScrollArea *scroll, PeerData
 		if (chatPhoto && chatPhoto->date) {
 			_photoLink = TextLinkPtr(new PhotoLink(chatPhoto, _peer));
 		}
-		if (_peerChannel->isMegagroup() && _peerChannel->mgInfo->lastParticipants.isEmpty()) {
+		if (_peerChannel->isMegagroup() && (_peerChannel->mgInfo->lastParticipants.isEmpty() || (_peerChannel->mgInfo->lastParticipantsStatus & MegagroupInfo::LastParticipantsAdminsOutdated) || _peerChannel->lastParticipantsCountOutdated())) {
 			if (App::api()) App::api()->requestLastParticipants(_peerChannel);
 		}
 		_peerChannel->updateFull();
@@ -487,7 +487,7 @@ void ProfileInner::onAdmins() {
 void ProfileInner::onCreateInvitationLink() {
 	if (!_peerChat && !_peerChannel) return;
 
-	ConfirmBox *box = new ConfirmBox(lang((_peerChat && _peerChat->invitationUrl.isEmpty()) ? lng_group_invite_about : lng_group_invite_about_new));
+	ConfirmBox *box = new ConfirmBox(lang(((_peerChat && _peerChat->invitationUrl.isEmpty()) || (_peerChannel && _peerChannel->invitationUrl.isEmpty())) ? lng_group_invite_about : lng_group_invite_about_new));
 	connect(box, SIGNAL(confirmed()), this, SLOT(onCreateInvitationLinkSure()));
 	App::wnd()->showLayer(box);
 }
@@ -686,24 +686,31 @@ void ProfileInner::reorderParticipants() {
 		}
 		loadProfilePhotos(_lastPreload);
 	} else if (_peerChannel && _peerChannel->isMegagroup() && _peerChannel->amIn() && !_peerChannel->mgInfo->lastParticipants.isEmpty()) {
-		if (!_peerChannel->mgInfo->lastParticipants.isEmpty()) {
+		if (_peerChannel->mgInfo->lastParticipants.isEmpty() || (_peerChannel->mgInfo->lastParticipantsStatus & MegagroupInfo::LastParticipantsAdminsOutdated) || _peerChannel->lastParticipantsCountOutdated()) {
-			_participants.clear();
+			if (App::api()) App::api()->requestLastParticipants(_peerChannel);
-			for (ParticipantsData::iterator i = _participantsData.begin(), e = _participantsData.end(); i != e; ++i) {
+		} else if (!_peerChannel->mgInfo->lastParticipants.isEmpty()) {
-				if (*i) {
+			const MegagroupInfo::LastParticipants &list(_peerChannel->mgInfo->lastParticipants);
-					delete *i;
+			int32 s = list.size();
-					*i = 0;
+			for (int32 i = 0, l = _participants.size(); i < l; ++i) {
+				if (i >= s || _participants.at(i) != list.at(i)) {
+					if (_participantsData.at(i)) {
+						delete _participantsData.at(i);
+						_participantsData[i] = 0;
+					}
+					if (i < s) {
+						_participants[i] = list.at(i);
+					}
 				}
 			}
-			_participants.reserve(_peerChannel->mgInfo->lastParticipants.size());
+			if (_participants.size() > s) {
-			_participantsData.resize(_peerChannel->mgInfo->lastParticipants.size());
+				_participants.resize(s);
-		}
+			} else {
-		UserData *self = App::self();
+				_participants.reserve(s);
-		bool onlyMe = true;
+				for (int32 i = _participants.size(); i < s; ++i) {
-		for (MegagroupInfo::LastParticipants::const_iterator i = _peerChannel->mgInfo->lastParticipants.cbegin(), e = _peerChannel->mgInfo->lastParticipants.cend(); i != e; ++i) {
+					_participants.push_back(list.at(i));
-			_participants.push_back(*i);
+				}
-		}
+			}
-		if (_peerChannel->mgInfo->lastParticipants.isEmpty()) {
+			_participantsData.resize(s);
-			if (App::api()) App::api()->requestLastParticipants(_peerChannel);
 		}
 		_onlineText = (_peerChannel->count > 0) ? lng_chat_status_members(lt_count, _peerChannel->count) : lang(_peerChannel->isMegagroup() ? lng_group_status : lng_channel_status);
 		loadProfilePhotos(_lastPreload);
@@ -1720,6 +1727,11 @@ void ProfileWidget::onScroll() {
 	if (!_scroll.isHidden() && _scroll.scrollTop() < _scroll.scrollTopMax()) {
 		_inner.allowDecreaseHeight(_scroll.scrollTopMax() - _scroll.scrollTop());
 	}
+	if (peer()->isMegagroup() && !peer()->asChannel()->mgInfo->lastParticipants.isEmpty() && peer()->asChannel()->mgInfo->lastParticipants.size() < peer()->asChannel()->count) {
+		if (_scroll.scrollTop() + PreloadHeightsCount * _scroll.height() > _scroll.scrollTopMax()) {
+			App::api()->requestLastParticipants(peer()->asChannel(), false);
+		}
+	}
 }
 
 void ProfileWidget::resizeEvent(QResizeEvent *e) {

Telegram/SourceFiles/structs.h

@@ -526,7 +526,7 @@ private:
 };
 
 struct MegagroupInfo {
-	MegagroupInfo() : botStatus(-1), migrateFromPtr(0) {
+	MegagroupInfo() : botStatus(-1), migrateFromPtr(0), lastParticipantsStatus(LastParticipantsUpToDate), lastParticipantsCount(0) {
 	}
 	typedef QList<UserData*> LastParticipants;
 	LastParticipants lastParticipants;
@@ -537,6 +537,15 @@ struct MegagroupInfo {
 	typedef QMap<UserData*, bool> Bots;
 	Bots bots;
 	int32 botStatus; // -1 - no bots, 0 - unknown, 1 - one bot, that sees all history, 2 - other
+
+	enum LastParticipantsStatus {
+		LastParticipantsUpToDate       = 0x00,
+		LastParticipantsAdminsOutdated = 0x01,
+		LastParticipantsCountOutdated  = 0x02,
+	};
+	mutable int32 lastParticipantsStatus;
+	int32 lastParticipantsCount;
+
 	ChatData *migrateFromPtr;
 };
 
@@ -563,6 +572,16 @@ public:
 	int32 version;
 	int32 flags, flagsFull;
 	MegagroupInfo *mgInfo;
+	bool lastParticipantsCountOutdated() const {
+		if (!mgInfo || !(mgInfo->lastParticipantsStatus & MegagroupInfo::LastParticipantsCountOutdated)) {
+			return false;
+		}
+		if (mgInfo->lastParticipantsCount == count) {
+			mgInfo->lastParticipantsStatus &= ~MegagroupInfo::LastParticipantsCountOutdated;
+			return false;
+		}
+		return true;
+	}
 	void flagsUpdated();
 	bool isMegagroup() const {
 		return flags & MTPDchannel::flag_megagroup;