Request last topic message if it becomes unknown.

Telegram/SourceFiles/data/data_forum.cpp

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_forum.h"
 
 #include "data/data_channel.h"
+#include "data/data_histories.h"
 #include "data/data_session.h"
 #include "data/data_forum_topic.h"
 #include "history/history.h"
@@ -32,14 +33,25 @@ constexpr auto kGeneralColorId = 0xA9A9A9;
 
 Forum::Forum(not_null<History*> history)
 : _history(history)
-, _topicsList(&_history->session(), FilterId(0), rpl::single(1)) {
+, _topicsList(&session(), FilterId(0), rpl::single(1)) {
 	Expects(_history->peer->isChannel());
 }
 
 Forum::~Forum() {
 	if (_requestId) {
-		_history->session().api().request(_requestId).cancel();
+		session().api().request(_requestId).cancel();
 	}
+	for (const auto &request : _topicRequests) {
+		owner().histories().cancelRequest(request.second.id);
+	}
+}
+
+Session &Forum::owner() const {
+	return _history->owner();
+}
+
+Main::Session &Forum::session() const {
+	return _history->session();
 }
 
 not_null<History*> Forum::history() const {
@@ -60,8 +72,7 @@ void Forum::requestTopics() {
 	}
 	const auto firstLoad = !_offsetDate;
 	const auto loadCount = firstLoad ? kTopicsFirstLoad : kTopicsPerPage;
-	const auto api = &_history->session().api();
-	_requestId = api->request(MTPchannels_GetForumTopics(
+	_requestId = session().api().request(MTPchannels_GetForumTopics(
 		MTP_flags(0),
 		channel()->inputChannel,
 		MTPstring(), // q
@@ -90,10 +101,9 @@ void Forum::applyReceivedTopics(
 		const MTPmessages_ForumTopics &topics,
 		bool updateOffset) {
 	const auto &data = topics.data();
-	const auto owner = &channel()->owner();
-	owner->processUsers(data.vusers());
-	owner->processChats(data.vchats());
-	owner->processMessages(data.vmessages(), NewMessageType::Existing);
+	owner().processUsers(data.vusers());
+	owner().processChats(data.vchats());
+	owner().processMessages(data.vmessages(), NewMessageType::Existing);
 	channel()->ptsReceived(data.vpts().v);
 	const auto &list = data.vtopics().v;
 	for (const auto &topic : list) {
@@ -121,6 +131,42 @@ void Forum::applyReceivedTopics(
 	}
 }
 
+void Forum::requestTopic(MsgId rootId, Fn<void()> done) {
+	auto &request = _topicRequests[rootId];
+	if (done) {
+		request.callbacks.push_back(std::move(done));
+	}
+	if (request.id) {
+		return;
+	}
+	const auto call = [=] {
+		if (const auto request = _topicRequests.take(rootId)) {
+			for (const auto &callback : request->callbacks) {
+				callback();
+			}
+		}
+	};
+	const auto type = Histories::RequestType::History;
+	auto &histories = owner().histories();
+	request.id = histories.sendRequest(_history, type, [=](
+			Fn<void()> finish) {
+		return session().api().request(
+			MTPchannels_GetForumTopicsByID(
+				channel()->inputChannel,
+				MTP_vector<MTPint>(1, MTP_int(rootId.bare)))
+		).done([=](const MTPmessages_ForumTopics &result) {
+			if (const auto forum = _history->peer->forum()) {
+				forum->applyReceivedTopics(result);
+				call();
+				finish();
+			}
+		}).fail([=] {
+			call();
+			finish();
+		}).send();
+	});
+}
+
 void Forum::applyTopicAdded(
 		MsgId rootId,
 		const QString &title,
@@ -152,7 +198,7 @@ MsgId Forum::reserveCreatingId(
 		const QString &title,
 		int32 colorId,
 		DocumentId iconId) {
-	const auto result = _history->owner().nextLocalMessageId();
+	const auto result = owner().nextLocalMessageId();
 	_creatingRootIds.emplace(result);
 	applyTopicAdded(result, title, colorId, iconId);
 	return result;
@@ -189,7 +235,7 @@ void Forum::created(MsgId rootId, MsgId realId) {
 			std::move(topic)
 		).first->second->setRealRootId(realId);
 	}
-	_history->owner().notifyItemIdChange({ id, rootId });
+	owner().notifyItemIdChange({ id, rootId });
 }
 
 ForumTopic *Forum::topicFor(not_null<HistoryItem*> item) {

Telegram/SourceFiles/data/data_forum.h

@@ -12,17 +12,25 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 class History;
 class ChannelData;
 
+namespace Main {
+class Session;
+} // namespace Main
+
 namespace Window {
 class SessionController;
 } // namespace Window;
 
 namespace Data {
 
+class Session;
+
 class Forum final {
 public:
 	explicit Forum(not_null<History*> history);
 	~Forum();
 
+	[[nodiscard]] Session &owner() const;
+	[[nodiscard]] Main::Session &session() const;
 	[[nodiscard]] not_null<History*> history() const;
 	[[nodiscard]] not_null<ChannelData*> channel() const;
 	[[nodiscard]] not_null<Dialogs::MainList*> topicsList();
@@ -31,6 +39,7 @@ public:
 	[[nodiscard]] rpl::producer<> chatsListChanges() const;
 	[[nodiscard]] rpl::producer<> chatsListLoadedEvents() const;
 
+	void requestTopic(MsgId rootId, Fn<void()> done = nullptr);
 	void applyTopicAdded(
 		MsgId rootId,
 		const QString &title,
@@ -52,6 +61,11 @@ public:
 	void created(MsgId rootId, MsgId realId);
 
 private:
+	struct TopicRequest {
+		mtpRequestId id = 0;
+		std::vector<Fn<void()>> callbacks;
+	};
+
 	void applyReceivedTopics(
 		const MTPmessages_ForumTopics &topics,
 		bool updateOffset);
@@ -61,6 +75,8 @@ private:
 	base::flat_map<MsgId, std::unique_ptr<ForumTopic>> _topics;
 	Dialogs::MainList _topicsList;
 
+	base::flat_map<MsgId, TopicRequest> _topicRequests;
+
 	mtpRequestId _requestId = 0;
 	TimeId _offsetDate = 0;
 	MsgId _offsetId = 0;

Telegram/SourceFiles/data/data_forum_topic.cpp

@@ -351,8 +351,8 @@ void ForumTopic::validateDefaultIcon() const {
 }
 
 void ForumTopic::requestChatListMessage() {
-	if (!chatListMessageKnown()) {
-		// #TODO forum
+	if (!chatListMessageKnown() && !forum()->creating(_rootId)) {
+		forum()->requestTopic(_rootId);
 	}
 }
 
@@ -361,7 +361,7 @@ TimeId ForumTopic::adjustedChatListTimeId() const {
 		return TimeId(1);
 	}
 	const auto result = chatListTimeId();
-#if 0 // #TODO forum
+#if 0 // #TODO forum draft
 	if (const auto draft = cloudDraft()) {
 		if (!Data::draftIsNull(draft) && !session().supportMode()) {
 			return std::max(result, draft->date);
@@ -458,6 +458,7 @@ void ForumTopic::applyItemRemoved(MsgId id) {
 	if (const auto chatListItem = _chatListMessage.value_or(nullptr)) {
 		if (chatListItem->id == id) {
 			_chatListMessage = std::nullopt;
+			requestChatListMessage();
 		}
 	}
 }

Telegram/SourceFiles/dialogs/dialogs.style

@@ -405,7 +405,7 @@ downloadIconSizeDone: 20px;
 
 forumTopicRow: DialogRow(defaultDialogRow) {
 	height: 54px;
-	padding: margins(8px, 7px, 8px, 7px);
+	padding: margins(8px, 7px, 10px, 7px);
 	photoSize: 20px;
 	nameLeft: 39px;
 	nameTop: 7px;

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -1211,7 +1211,7 @@ void InnerWidget::checkReorderPinnedStart(QPoint localPosition) {
 		< style::ConvertScale(kStartReorderThreshold)) {
 		return;
 	} else if (_openedForum) {
-		return; // #TODO forum
+		return; // #TODO forum pinned
 	}
 	_dragging = _pressed;
 	if (updateReorderIndexGetCount() < 2) {
@@ -2415,7 +2415,7 @@ void InnerWidget::refreshEmptyLabel() {
 		: (state == EmptyState::EmptyFolder)
 		? tr::lng_no_chats_filter()
 		: (state == EmptyState::EmptyForum)
-		// #TODO forum
+		// #TODO lang-forum
 		? rpl::single(u"No chats currently created in this forum."_q)
 		: tr::lng_contacts_loading();
 	auto link = (state == EmptyState::NoContacts)
@@ -2423,7 +2423,7 @@ void InnerWidget::refreshEmptyLabel() {
 		: (state == EmptyState::EmptyFolder)
 		? tr::lng_filters_context_edit()
 		: (state == EmptyState::EmptyForum)
-		// #TODO forum
+		// #TODO lang-forum
 		? rpl::single(u"Create topic"_q)
 		: rpl::single(QString());
 	auto full = rpl::combine(

Telegram/SourceFiles/dialogs/ui/dialogs_layout.cpp

@@ -346,6 +346,7 @@ void PaintRow(
 	row->paintRipple(p, 0, 0, context.width, &ripple->c);
 
 	const auto history = chat.history();
+	const auto topic = chat.topic();
 
 	if (flags & Flag::SavedMessages) {
 		EmptyUserpic::PaintSavedMessages(
@@ -561,7 +562,7 @@ void PaintRow(
 			// Empty history
 		}
 	} else if (!item->isEmpty()) {
-		if (history && !promoted) {
+		if ((history || topic) && !promoted) {
 			PaintRowDate(p, date, rectForName, context);
 		}
 

Telegram/SourceFiles/history/view/history_view_replies_section.cpp

@@ -355,7 +355,6 @@ RepliesWidget::~RepliesWidget() {
 	if (_readRequestTimer.isActive()) {
 		sendReadTillRequest();
 	}
-	_history->session().api().request(_resolveTopicRequestId).cancel();
 	base::take(_sendAction);
 	_history->owner().sendActionManager().repliesPainterRemoved(
 		_history,
@@ -478,7 +477,7 @@ void RepliesWidget::setupTopicViewer() {
 void RepliesWidget::setTopic(Data::ForumTopic *topic) {
 	if ((_topic = topic)) {
 		refreshTopBarActiveChat();
-		if (_rootView) {
+		if (_topic && _rootView) {
 			_rootView = nullptr;
 			_rootViewHeight = 0;
 			updateControlsGeometry();
@@ -492,24 +491,15 @@ HistoryItem *RepliesWidget::lookupRoot() const {
 
 Data::ForumTopic *RepliesWidget::lookupTopic() {
 	if (const auto forum = _history->peer->forum()) {
-		const auto result = forum->topicFor(_rootId);
-		if (!result && !_resolveTopicRequestId) {
-			const auto api = &_history->session().api();
-			_resolveTopicRequestId = api->request(
-				MTPchannels_GetForumTopicsByID(
-					forum->channel()->inputChannel,
-					MTP_vector<MTPint>(1, MTP_int(_rootId.bare)))
-			).done([=](const MTPmessages_ForumTopics &result) {
+		if (const auto result = forum->topicFor(_rootId)) {
+			return result;
+		} else {
+			forum->requestTopic(_rootId, crl::guard(this, [=] {
 				if (const auto forum = _history->peer->forum()) {
-					forum->applyReceivedTopics(result);
 					setTopic(forum->topicFor(_rootId));
 				}
-				_resolveTopicRequestId = 0;
-			}).fail([=] {
-				_resolveTopicRequestId = 0;
-			}).send();
+			}));
 		}
-		return result;
 	}
 	return nullptr;
 }

Telegram/SourceFiles/history/view/history_view_replies_section.h

@@ -311,8 +311,6 @@ private:
 	bool _readRequestPending = false;
 	mtpRequestId _readRequestId = 0;
 
-	mtpRequestId _resolveTopicRequestId = 0;
-
 	mtpRequestId _reloadUnreadCountRequestId = 0;
 	bool _loaded = false;
 

Telegram/SourceFiles/info/profile/info_profile_inner_widget.cpp

@@ -77,7 +77,7 @@ object_ptr<Ui::RpWidget> InnerWidget::setupContent(
 	}, _cover->lifetime());
 	_cover->setOnlineCount(rpl::single(0));
 	if (_topic) {
-		// #TODO forum
+		// #TODO forum shared media
 		//result->add(setupSharedMedia(result.data()));
 		return result;
 	}

Telegram/SourceFiles/mainwidget.cpp

@@ -1961,7 +1961,7 @@ void MainWidget::windowShown() {
 
 void MainWidget::dialogsToUp() {
 	if (_dialogs) {
-		_dialogs->jumpToTop(true);
+		_dialogs->jumpToTop();
 	}
 }
 

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -352,7 +352,7 @@ void Filler::addHidePromotion() {
 
 void Filler::addTogglePin() {
 	if (!_peer) {
-		// #TODO forum pin
+		// #TODO forum pinned
 		return;
 	}
 	const auto controller = _controller;