Implement pinned topics reordering.

Telegram/SourceFiles/api/api_chat_filters.cpp

@@ -17,9 +17,7 @@ namespace Api {
 void SaveNewFilterPinned(
 		not_null<Main::Session*> session,
 		FilterId filterId) {
-	const auto &order = session->data().pinnedChatsOrder(
-		nullptr,
-		filterId);
+	const auto &order = session->data().pinnedChatsOrder(filterId);
 	auto &filters = session->data().chatsFilters();
 	const auto &filter = filters.applyUpdatedPinned(filterId, order);
 	session->api().request(MTPmessages_UpdateDialogFilter(

Telegram/SourceFiles/api/api_updates.cpp

@@ -2308,6 +2308,29 @@ void Updates::feedUpdate(const MTPUpdate &update) {
 
 	case mtpc_updateChannelPinnedTopics: {
 		const auto &d = update.c_updateChannelPinnedTopics();
+		const auto peerId = peerFromChannel(d.vchannel_id());
+		if (const auto peer = session().data().peerLoaded(peerId)) {
+			if (const auto forum = peer->forum()) {
+				const auto done = [&] {
+					const auto list = d.vorder();
+					if (!list) {
+						return false;
+					}
+					const auto &order = list->v;
+					const auto notLoaded = [&](const MTPint &topicId) {
+						return !forum->topicFor(topicId.v);
+					};
+					if (!ranges::none_of(order, notLoaded)) {
+						return false;
+					}
+					session().data().applyPinnedTopics(forum, order);
+					return true;
+				}();
+				if (!done) {
+					forum->reloadTopics();
+				}
+			}
+		}
 	} break;
 
 	// Pinned message.

Telegram/SourceFiles/apiwrap.cpp

@@ -39,6 +39,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_web_page.h"
 #include "data/data_folder.h"
 #include "data/data_forum_topic.h"
+#include "data/data_forum.h"
 #include "data/data_media_types.h"
 #include "data/data_sparse_ids.h"
 #include "data/data_search_controller.h"
@@ -384,9 +385,7 @@ void ApiWrap::checkChatInvite(
 }
 
 void ApiWrap::savePinnedOrder(Data::Folder *folder) {
-	const auto &order = _session->data().pinnedChatsOrder(
-		folder,
-		FilterId());
+	const auto &order = _session->data().pinnedChatsOrder(folder);
 	const auto input = [](const Dialogs::Key &key) {
 		if (const auto history = key.history()) {
 			return MTP_inputDialogPeer(history->peer->input);
@@ -408,6 +407,29 @@ void ApiWrap::savePinnedOrder(Data::Folder *folder) {
 	)).send();
 }
 
+void ApiWrap::savePinnedOrder(not_null<Data::Forum*> forum) {
+	const auto &order = _session->data().pinnedChatsOrder(forum);
+	const auto input = [](const Dialogs::Key &key) {
+		if (const auto topic = key.topic()) {
+			return MTP_int(topic->rootId().bare);
+		}
+		Unexpected("Key type in pinnedDialogsOrder().");
+	};
+	auto topics = QVector<MTPint>();
+	topics.reserve(order.size());
+	ranges::transform(
+		order,
+		ranges::back_inserter(topics),
+		input);
+	request(MTPchannels_ReorderPinnedForumTopics(
+		MTP_flags(MTPchannels_ReorderPinnedForumTopics::Flag::f_force),
+		forum->channel()->inputChannel,
+		MTP_vector(topics)
+	)).done([=](const MTPUpdates &result) {
+		applyUpdates(result);
+	}).send();
+}
+
 void ApiWrap::toggleHistoryArchived(
 		not_null<History*> history,
 		bool archived,

Telegram/SourceFiles/apiwrap.h

@@ -32,6 +32,7 @@ class WallPaper;
 struct ResolvedForwardDraft;
 enum class DefaultNotify;
 enum class StickersType : uchar;
+class Forum;
 class ForumTopic;
 class Thread;
 } // namespace Data
@@ -149,6 +150,7 @@ public:
 	void saveCurrentDraftToCloud();
 
 	void savePinnedOrder(Data::Folder *folder);
+	void savePinnedOrder(not_null<Data::Forum*> forum);
 	void toggleHistoryArchived(
 		not_null<History*> history,
 		bool archived,

Telegram/SourceFiles/boxes/choose_filter_box.cpp

@@ -127,7 +127,7 @@ ChooseFilterValidator::LimitData ChooseFilterValidator::limitReached(
 
 	const auto list = _history->owner().chatsFilters().list();
 	const auto i = ranges::find(list, filterId, &Data::ChatFilter::id);
-	const auto limit = _history->owner().pinnedChatsLimit(nullptr, filterId);
+	const auto limit = _history->owner().pinnedChatsLimit(filterId);
 	return {
 		.reached = (i != end(list))
 			&& !ranges::contains(i->always(), _history)

Telegram/SourceFiles/data/data_chat_filters.cpp

@@ -236,12 +236,12 @@ not_null<Dialogs::MainList*> ChatFilters::chatsList(FilterId filterId) {
 		auto limit = rpl::single(rpl::empty_value()) | rpl::then(
 			_owner->session().account().appConfig().refreshed()
 		) | rpl::map([=] {
-			return _owner->pinnedChatsLimit(nullptr, filterId);
+			return _owner->pinnedChatsLimit(filterId);
 		});
 		pointer = std::make_unique<Dialogs::MainList>(
 			&_owner->session(),
 			filterId,
-			_owner->maxPinnedChatsLimitValue(nullptr, filterId));
+			_owner->maxPinnedChatsLimitValue(filterId));
 	}
 	return pointer.get();
 }
@@ -476,7 +476,7 @@ const ChatFilter &ChatFilters::applyUpdatedPinned(
 	const auto i = ranges::find(_list, id, &ChatFilter::id);
 	Assert(i != end(_list));
 
-	const auto limit = _owner->pinnedChatsLimit(nullptr, id);
+	const auto limit = _owner->pinnedChatsLimit(id);
 	auto always = i->always();
 	auto pinned = std::vector<not_null<History*>>();
 	pinned.reserve(dialogs.size());

Telegram/SourceFiles/data/data_folder.cpp

@@ -41,7 +41,7 @@ Folder::Folder(not_null<Data::Session*> owner, FolderId id)
 , _chatsList(
 	&owner->session(),
 	FilterId(),
-	owner->maxPinnedChatsLimitValue(this, FilterId()))
+	owner->maxPinnedChatsLimitValue(this))
 , _name(tr::lng_archived_name(tr::now)) {
 	indexNameParts();
 

Telegram/SourceFiles/data/data_forum.cpp

@@ -37,14 +37,13 @@ constexpr auto kTopicsFirstLoad = 20;
 constexpr auto kLoadedTopicsMinCount = 20;
 constexpr auto kTopicsPerPage = 500;
 constexpr auto kStalePerRequest = 100;
-constexpr auto kPinnedLimit = 5;
 // constexpr auto kGeneralColorId = 0xA9A9A9;
 
 } // namespace
 
 Forum::Forum(not_null<History*> history)
 : _history(history)
-, _topicsList(&session(), FilterId(0), rpl::single(kPinnedLimit)) {
+, _topicsList(&session(), {}, owner().maxPinnedChatsLimitValue(this)) {
 	Expects(_history->peer->isChannel());
 
 	if (_history->inChatList()) {

Telegram/SourceFiles/data/data_forum_topic.cpp

@@ -42,7 +42,7 @@ namespace {
 
 using UpdateFlag = TopicUpdate::Flag;
 
-constexpr auto kUserpicLoopsCount = 2;
+constexpr auto kUserpicLoopsCount = 1;
 
 } // namespace
 
@@ -315,12 +315,7 @@ void ForumTopic::applyTopic(const MTPDforumTopic &data) {
 	if (min) {
 		int a = 0;
 	} else {
-		if (data.is_pinned()) {
-			owner().setChatPinned(this, 0, true);
-		} else {
-			_list->pinned()->setPinned(this, false);
-		}
-
+		owner().setPinnedFromEntryList(this, data.is_pinned());
 		owner().notifySettings().apply(this, data.vnotify_settings());
 
 		if (const auto draft = data.vdraft()) {

Telegram/SourceFiles/data/data_session.cpp

@@ -85,6 +85,8 @@ namespace {
 
 using ViewElement = HistoryView::Element;
 
+constexpr auto kTopicsPinLimit = 5;
+
 // s: box 100x100
 // m: box 320x320
 // x: box 800x800
@@ -241,7 +243,7 @@ Session::Session(not_null<Main::Session*> session)
 , _chatsList(
 	session,
 	FilterId(),
-	maxPinnedChatsLimitValue(nullptr, FilterId()))
+	maxPinnedChatsLimitValue(nullptr))
 , _contactsList(Dialogs::SortMode::Name)
 , _contactsNoChatsList(Dialogs::SortMode::Name)
 , _ttlCheckTimer([=] { checkTTLs(); })
@@ -1925,10 +1927,10 @@ void Session::setChatPinned(
 	notifyPinnedDialogsOrderUpdated();
 }
 
-void Session::setPinnedFromDialog(const Dialogs::Key &key, bool pinned) {
+void Session::setPinnedFromEntryList(const Dialogs::Key &key, bool pinned) {
 	Expects(key.entry()->folderKnown());
 
-	const auto list = chatsList(key.entry()->folder())->pinned();
+	const auto list = chatsListFor(key.entry())->pinned();
 	if (pinned) {
 		list->addPinned(key);
 	} else {
@@ -1957,6 +1959,13 @@ void Session::applyPinnedChats(
 	notifyPinnedDialogsOrderUpdated();
 }
 
+void Session::applyPinnedTopics(
+		not_null<Data::Forum*> forum,
+		const QVector<MTPint> &list) {
+	forum->topicsList()->pinned()->applyList(forum, list);
+	notifyPinnedDialogsOrderUpdated();
+}
+
 void Session::applyDialogs(
 		Data::Folder *requestFolder,
 		const QVector<MTPMessage> &messages,
@@ -1983,7 +1992,7 @@ void Session::applyDialog(
 
 	const auto history = this->history(peerId);
 	history->applyDialog(requestFolder, data);
-	setPinnedFromDialog(history, data.is_pinned());
+	setPinnedFromEntryList(history, data.is_pinned());
 
 	if (const auto from = history->peer->migrateFrom()) {
 		if (const auto historyFrom = historyLoaded(from)) {
@@ -2004,37 +2013,63 @@ void Session::applyDialog(
 	}
 	const auto folder = processFolder(data.vfolder());
 	folder->applyDialog(data);
-	setPinnedFromDialog(folder, data.is_pinned());
+	setPinnedFromEntryList(folder, data.is_pinned());
 }
 
-int Session::pinnedCanPin(
-		Data::Folder *folder,
+bool Session::pinnedCanPin(not_null<Data::Thread*> thread) const {
+	if (const auto topic = thread->asTopic()) {
+		const auto forum = topic->forum();
+		return pinnedChatsOrder(forum).size() < pinnedChatsLimit(forum);
+	}
+	const auto folder = thread->folder();
+	return pinnedChatsOrder(folder).size() < pinnedChatsLimit(folder);
+}
+
+bool Session::pinnedCanPin(
 		FilterId filterId,
 		not_null<History*> history) const {
-	if (!filterId) {
-		const auto limit = pinnedChatsLimit(folder, filterId);
-		return pinnedChatsOrder(folder, FilterId()).size() < limit;
-	}
+	Expects(filterId != 0);
+
 	const auto &list = chatsFilters().list();
 	const auto i = ranges::find(list, filterId, &Data::ChatFilter::id);
 	return (i == end(list))
 		|| (i->always().contains(history))
-		|| (i->always().size() < pinnedChatsLimit(folder, filterId));
+		|| (i->always().size() < pinnedChatsLimit(filterId));
 }
 
-int Session::pinnedChatsLimit(
-		Data::Folder *folder,
-		FilterId filterId) const {
+int Session::pinnedChatsLimit(Data::Folder *folder) const {
 	const auto limits = Data::PremiumLimits(_session);
-	return filterId
-		? limits.dialogFiltersChatsCurrent()
-		: folder
+	return folder
 		? limits.dialogsFolderPinnedCurrent()
 		: limits.dialogsPinnedCurrent();
 }
 
+int Session::pinnedChatsLimit(FilterId filterId) const {
+	const auto limits = Data::PremiumLimits(_session);
+	return limits.dialogFiltersChatsCurrent();
+}
+
+int Session::pinnedChatsLimit(not_null<Data::Forum*> forum) const {
+	return kTopicsPinLimit;
+}
+
+rpl::producer<int> Session::maxPinnedChatsLimitValue(
+		Data::Folder *folder) const {
+	// Premium limit from appconfig.
+	// We always use premium limit in the MainList limit producer,
+	// because it slices the list to that limit. We don't want to slice
+	// premium-ly added chats from the pinned list because of sync issues.
+	return rpl::single(rpl::empty_value()) | rpl::then(
+		_session->account().appConfig().refreshed()
+	) | rpl::map([=] {
+		const auto limits = Data::PremiumLimits(_session);
+		return folder
+			? limits.dialogsFolderPinnedPremium()
+			: limits.dialogsPinnedPremium();
+	});
+}
+
 rpl::producer<int> Session::maxPinnedChatsLimitValue(
-		Data::Folder *folder,
 		FilterId filterId) const {
 	// Premium limit from appconfig.
 	// We always use premium limit in the MainList limit producer,
@@ -2044,21 +2079,28 @@ rpl::producer<int> Session::maxPinnedChatsLimitValue(
 		_session->account().appConfig().refreshed()
 	) | rpl::map([=] {
 		const auto limits = Data::PremiumLimits(_session);
-		return filterId
-			? limits.dialogFiltersChatsPremium()
-			: folder
-			? limits.dialogsFolderPinnedPremium()
-			: limits.dialogsPinnedPremium();
+		return limits.dialogFiltersChatsPremium();
 	});
 }
 
+rpl::producer<int> Session::maxPinnedChatsLimitValue(
+		not_null<Data::Forum*> forum) const {
+	return rpl::single(pinnedChatsLimit(forum));
+}
+
+const std::vector<Dialogs::Key> &Session::pinnedChatsOrder(
+		Data::Folder *folder) const {
+	return chatsList(folder)->pinned()->order();
+}
+
 const std::vector<Dialogs::Key> &Session::pinnedChatsOrder(
-		Data::Folder *folder,
 		FilterId filterId) const {
-	const auto list = filterId
-		? chatsFilters().chatsList(filterId)
-		: chatsList(folder);
-	return list->pinned()->order();
+	return chatsFilters().chatsList(filterId)->pinned()->order();
+}
+
+const std::vector<Dialogs::Key> &Session::pinnedChatsOrder(
+		not_null<Data::Forum*> forum) const {
+	return forum->topicsList()->pinned()->order();
 }
 
 void Session::clearPinnedChats(Data::Folder *folder) {
@@ -2072,7 +2114,10 @@ void Session::reorderTwoPinnedChats(
 	Expects(key1.entry()->folderKnown() && key2.entry()->folderKnown());
 	Expects(filterId || (key1.entry()->folder() == key2.entry()->folder()));
 
-	const auto list = filterId
+	const auto topic = key1.topic();
+	const auto list = topic
+		? topic->forum()->topicsList()
+		: filterId
 		? chatsFilters().chatsList(filterId)
 		: chatsList(key1.entry()->folder());
 	list->pinned()->reorder(key1, key2);

Telegram/SourceFiles/data/data_session.h

@@ -230,16 +230,16 @@ public:
 	[[nodiscard]] rpl::variable<bool> &contactsLoaded() {
 		return _contactsLoaded;
 	}
-	[[nodiscard]] rpl::producer<Data::Folder*> chatsListChanges() const {
+	[[nodiscard]] rpl::producer<Folder*> chatsListChanges() const {
 		return _chatsListChanged.events();
 	}
-	[[nodiscard]] bool chatsListLoaded(Data::Folder *folder = nullptr);
-	[[nodiscard]] rpl::producer<Data::Folder*> chatsListLoadedEvents() const {
+	[[nodiscard]] bool chatsListLoaded(Folder *folder = nullptr);
+	[[nodiscard]] rpl::producer<Folder*> chatsListLoadedEvents() const {
 		return _chatsListLoadedEvents.events();
 	}
 	void chatsListChanged(FolderId folderId);
-	void chatsListChanged(Data::Folder *folder);
-	void chatsListDone(Data::Folder *folder);
+	void chatsListChanged(Folder *folder);
+	void chatsListDone(Folder *folder);
 
 	void userIsBotChanged(not_null<UserData*> user);
 	[[nodiscard]] rpl::producer<not_null<UserData*>> userIsBotChanges() const;
@@ -339,32 +339,42 @@ public:
 	void applyUpdate(const MTPDupdateChatDefaultBannedRights &update);
 
 	void applyDialogs(
-		Data::Folder *requestFolder,
+		Folder *requestFolder,
 		const QVector<MTPMessage> &messages,
 		const QVector<MTPDialog> &dialogs,
 		std::optional<int> count = std::nullopt);
 
-	int pinnedCanPin(
-		Data::Folder *folder,
+	[[nodiscard]] bool pinnedCanPin(not_null<Thread*> thread) const;
+	[[nodiscard]] bool pinnedCanPin(
 		FilterId filterId,
 		not_null<History*> history) const;
-	int pinnedChatsLimit(
-		Data::Folder *folder,
+	[[nodiscard]] int pinnedChatsLimit(Folder *folder) const;
+	[[nodiscard]] int pinnedChatsLimit(FilterId filterId) const;
+	[[nodiscard]] int pinnedChatsLimit(not_null<Forum*> forum) const;
+	[[nodiscard]] rpl::producer<int> maxPinnedChatsLimitValue(
+		Folder *folder) const;
+	[[nodiscard]] rpl::producer<int> maxPinnedChatsLimitValue(
 		FilterId filterId) const;
-	rpl::producer<int> maxPinnedChatsLimitValue(
-		Data::Folder *folder,
-		FilterId filterId) const;
-	const std::vector<Dialogs::Key> &pinnedChatsOrder(
-		Data::Folder *folder,
+	[[nodiscard]] rpl::producer<int> maxPinnedChatsLimitValue(
+		not_null<Forum*> forum) const;
+	[[nodiscard]] const std::vector<Dialogs::Key> &pinnedChatsOrder(
+		Folder *folder) const;
+	[[nodiscard]] const std::vector<Dialogs::Key> &pinnedChatsOrder(
+		not_null<Forum*> forum) const;
+	[[nodiscard]] const std::vector<Dialogs::Key> &pinnedChatsOrder(
 		FilterId filterId) const;
 	void setChatPinned(
 		const Dialogs::Key &key,
 		FilterId filterId,
 		bool pinned);
-	void clearPinnedChats(Data::Folder *folder);
+	void setPinnedFromEntryList(const Dialogs::Key &key, bool pinned);
+	void clearPinnedChats(Folder *folder);
 	void applyPinnedChats(
-		Data::Folder *folder,
+		Folder *folder,
 		const QVector<MTPDialogPeer> &list);
+	void applyPinnedTopics(
+		not_null<Data::Forum*> forum,
+		const QVector<MTPint> &list);
 	void reorderTwoPinnedChats(
 		FilterId filterId,
 		const Dialogs::Key &key1,
@@ -572,7 +582,7 @@ public:
 	not_null<PollData*> processPoll(const MTPPoll &data);
 	not_null<PollData*> processPoll(const MTPDmessageMediaPoll &data);
 
-	[[nodiscard]] not_null<Data::CloudImage*> location(
+	[[nodiscard]] not_null<CloudImage*> location(
 		const LocationPoint &point);
 
 	void registerPhotoItem(
@@ -655,9 +665,9 @@ public:
 	[[nodiscard]] not_null<Dialogs::MainList*> chatsListFor(
 		not_null<Dialogs::Entry*> entry);
 	[[nodiscard]] not_null<Dialogs::MainList*> chatsList(
-		Data::Folder *folder = nullptr);
+		Folder *folder = nullptr);
 	[[nodiscard]] not_null<const Dialogs::MainList*> chatsList(
-		Data::Folder *folder = nullptr) const;
+		Folder *folder = nullptr) const;
 	[[nodiscard]] not_null<Dialogs::IndexedList*> contactsList();
 	[[nodiscard]] not_null<Dialogs::IndexedList*> contactsNoChatsList();
 
@@ -727,9 +737,9 @@ private:
 	int computeUnreadBadge(const Dialogs::UnreadState &state) const;
 	bool computeUnreadBadgeMuted(const Dialogs::UnreadState &state) const;
 
-	void applyDialog(Data::Folder *requestFolder, const MTPDdialog &data);
+	void applyDialog(Folder *requestFolder, const MTPDdialog &data);
 	void applyDialog(
-		Data::Folder *requestFolder,
+		Folder *requestFolder,
 		const MTPDdialogFolder &data);
 
 	const Messages *messagesList(PeerId peerId) const;
@@ -818,8 +828,6 @@ private:
 		PhotoData *photo,
 		DocumentData *document);
 
-	void setPinnedFromDialog(const Dialogs::Key &key, bool pinned);
-
 	template <typename Method>
 	void enumerateItemViews(
 		not_null<const HistoryItem*> item,
@@ -843,8 +851,8 @@ private:
 	QPointer<Ui::BoxContent> _exportSuggestion;
 
 	rpl::variable<bool> _contactsLoaded = false;
-	rpl::event_stream<Data::Folder*> _chatsListLoadedEvents;
-	rpl::event_stream<Data::Folder*> _chatsListChanged;
+	rpl::event_stream<Folder*> _chatsListLoadedEvents;
+	rpl::event_stream<Folder*> _chatsListChanged;
 	rpl::event_stream<not_null<UserData*>> _userIsBotChanges;
 	rpl::event_stream<not_null<PeerData*>> _botCommandsChanges;
 	rpl::event_stream<ItemVisibilityQuery> _itemVisibilityQueries;
@@ -916,7 +924,7 @@ private:
 		base::flat_set<not_null<ViewElement*>>> _webpageViews;
 	std::unordered_map<
 		LocationPoint,
-		std::unique_ptr<Data::CloudImage>> _locations;
+		std::unique_ptr<CloudImage>> _locations;
 	std::unordered_map<
 		PollId,
 		std::unique_ptr<PollData>> _polls;

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -1255,6 +1255,13 @@ void InnerWidget::mousePressEvent(QMouseEvent *e) {
 		mousePressReleased(e->globalPos(), e->button(), e->modifiers());
 	}
 }
+const std::vector<Key> &InnerWidget::pinnedChatsOrder() const {
+	return _openedForum
+		? session().data().pinnedChatsOrder(_openedForum)
+		: _filterId
+		? session().data().pinnedChatsOrder(_filterId)
+		: session().data().pinnedChatsOrder(_openedFolder);
+}
 
 void InnerWidget::checkReorderPinnedStart(QPoint localPosition) {
 	if (!_pressed || _dragging || _state != WidgetState::Default) {
@@ -1262,16 +1269,12 @@ void InnerWidget::checkReorderPinnedStart(QPoint localPosition) {
 	} else if (qAbs(localPosition.y() - _dragStart.y())
 		< style::ConvertScale(kStartReorderThreshold)) {
 		return;
-	} else if (_openedForum) {
-		return;
 	}
 	_dragging = _pressed;
 	if (updateReorderIndexGetCount() < 2) {
 		_dragging = nullptr;
 	} else {
-		const auto &order = session().data().pinnedChatsOrder(
-			_openedFolder,
-			_filterId);
+		const auto &order = pinnedChatsOrder();
 		_pinnedOnDragStart = base::flat_set<Key>{
 			order.begin(),
 			order.end()
@@ -1301,12 +1304,7 @@ int InnerWidget::countPinnedIndex(Row *ofRow) {
 }
 
 void InnerWidget::savePinnedOrder() {
-	if (_openedForum) {
-		return;
-	}
-	const auto &newOrder = session().data().pinnedChatsOrder(
-		_openedFolder,
-		_filterId);
+	const auto &newOrder = pinnedChatsOrder();
 	if (newOrder.size() != _pinnedOnDragStart.size()) {
 		return; // Something has changed in the set of pinned chats.
 	}
@@ -1315,7 +1313,9 @@ void InnerWidget::savePinnedOrder() {
 			return; // Something has changed in the set of pinned chats.
 		}
 	}
-	if (_filterId) {
+	if (_openedForum) {
+		session().api().savePinnedOrder(_openedForum);
+	} else if (_filterId) {
 		Api::SaveNewFilterPinned(&session(), _filterId);
 	} else {
 		session().api().savePinnedOrder(_openedFolder);

Telegram/SourceFiles/dialogs/dialogs_inner_widget.h

@@ -346,6 +346,7 @@ private:
 
 	[[nodiscard]] not_null<IndexedList*> shownDialogs() const;
 
+	[[nodiscard]] const std::vector<Key> &pinnedChatsOrder() const;
 	void checkReorderPinnedStart(QPoint localPosition);
 	int updateReorderIndexGetCount();
 	bool updateReorderPinned(QPoint localPosition);

Telegram/SourceFiles/dialogs/dialogs_pinned_list.cpp

@@ -11,6 +11,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "dialogs/dialogs_entry.h"
 #include "history/history.h"
 #include "data/data_session.h"
+#include "data/data_forum.h"
 
 namespace Dialogs {
 
@@ -97,6 +98,15 @@ void PinnedList::applyList(
 	}
 }
 
+void PinnedList::applyList(
+		not_null<Data::Forum*> forum,
+		const QVector<MTPint> &list) {
+	clear();
+	for (const auto &topicId : list) {
+		addPinned(forum->topicFor(topicId.v));
+	}
+}
+
 void PinnedList::applyList(const std::vector<not_null<History*>> &list) {
 	Expects(_filterId != 0);
 

Telegram/SourceFiles/dialogs/dialogs_pinned_list.h

@@ -11,6 +11,7 @@ class History;
 
 namespace Data {
 class Session;
+class Forum;
 } // namespace Data
 
 namespace Dialogs {
@@ -35,6 +36,9 @@ public:
 	void applyList(
 		not_null<Data::Session*> owner,
 		const QVector<MTPDialogPeer> &list);
+	void applyList(
+		not_null<Data::Forum*> forum,
+		const QVector<MTPint> &list);
 	void applyList(const std::vector<not_null<History*>> &list);
 	void reorder(const Key &key1, const Key &key2);
 

Telegram/SourceFiles/platform/mac/touchbar/items/mac_pinned_chats_item.mm

@@ -386,9 +386,7 @@ TimeId CalculateOnlineTill(not_null<PeerData*> peer) {
 			if (index == result) {
 				return;
 			}
-			const auto &order = _session->data().pinnedChatsOrder(
-				nullptr,
-				FilterId());
+			const auto &order = _session->data().pinnedChatsOrder(nullptr);
 			const auto d = (index < result) ? 1 : -1; // Direction.
 			for (auto i = index; i != result; i += d) {
 				_session->data().chatsList()->pinned()->reorder(
@@ -634,7 +632,7 @@ TimeId CalculateOnlineTill(not_null<PeerData*> peer) {
 
 	const auto updatePinnedChats = [=] {
 		_pins = ranges::views::zip(
-			_session->data().pinnedChatsOrder(nullptr, FilterId()),
+			_session->data().pinnedChatsOrder(nullptr),
 			ranges::views::ints(0, ranges::unreachable)
 		) | ranges::views::transform([=](const auto &pair) {
 			const auto index = pair.second;

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -315,7 +315,7 @@ private:
 };
 
 History *FindWastedPin(not_null<Data::Session*> data, Data::Folder *folder) {
-	const auto &order = data->pinnedChatsOrder(folder, FilterId());
+	const auto &order = data->pinnedChatsOrder(folder);
 	for (const auto &pinned : order) {
 		if (const auto history = pinned.history()) {
 			if (history->peer->isChat()
@@ -336,24 +336,22 @@ void AddChatMembers(
 
 bool PinnedLimitReached(
 		not_null<Window::SessionController*> controller,
-		not_null<History*> history,
-		FilterId filterId) {
-	Expects(filterId != 0 || history->folderKnown());
-
-	const auto owner = &history->owner();
-	const auto folder = history->folder();
-	if (owner->pinnedCanPin(folder, filterId, history)) {
+		not_null<Data::Thread*> thread) {
+	const auto owner = &thread->owner();
+	if (owner->pinnedCanPin(thread)) {
 		return false;
 	}
 	// Some old chat, that was converted, maybe is still pinned.
-	const auto wasted = filterId ? nullptr : FindWastedPin(owner, folder);
+	const auto history = thread->asHistory();
+	if (!history) {
+		return true;
+	}
+	const auto folder = history->folder();
+	const auto wasted = FindWastedPin(owner, folder);
 	if (wasted) {
 		owner->setChatPinned(wasted, FilterId(), false);
 		owner->setChatPinned(history, FilterId(), true);
 		history->session().api().savePinnedOrder(folder);
-	} else if (filterId) {
-		controller->show(
-			Box(FilterPinsLimitBox, &history->session(), filterId));
 	} else if (folder) {
 		controller->show(Box(FolderPinsLimitBox, &history->session()));
 	} else {
@@ -362,6 +360,19 @@ bool PinnedLimitReached(
 	return true;
 }
 
+bool PinnedLimitReached(
+		not_null<Window::SessionController*> controller,
+		not_null<History*> history,
+		FilterId filterId) {
+	const auto owner = &history->owner();
+	if (owner->pinnedCanPin(filterId, history)) {
+		return false;
+	}
+	controller->show(
+		Box(FilterPinsLimitBox, &history->session(), filterId));
+	return true;
+}
+
 void TogglePinnedThread(
 		not_null<Window::SessionController*> controller,
 		not_null<Data::Thread*> thread) {