Load folders exceptions after 100 chats.

Telegram/SourceFiles/apiwrap.cpp

@@ -895,7 +895,11 @@ void ApiWrap::refreshDialogsLoadBlocked() {
 }
 
 void ApiWrap::requestMoreDialogsIfNeeded() {
-	if (_dialogsLoadState && !_dialogsLoadState->listReceived) {
+	const auto dialogsReady = !_dialogsLoadState
+		|| _dialogsLoadState->listReceived;
+	if (_session->data().chatsFilters().loadNextExceptions(dialogsReady)) {
+		return;
+	} else if (_dialogsLoadState && !_dialogsLoadState->listReceived) {
 		if (_dialogsLoadState->requestId) {
 			return;
 		}

Telegram/SourceFiles/data/data_chat_filters.cpp

@@ -14,7 +14,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_channel.h"
 #include "data/data_session.h"
 #include "data/data_folder.h"
+#include "data/data_histories.h"
 #include "dialogs/dialogs_main_list.h"
+#include "ui/ui_utility.h"
 #include "main/main_session.h"
 #include "apiwrap.h"
 
@@ -22,6 +24,8 @@ namespace Data {
 namespace {
 
 constexpr auto kRefreshSuggestedTimeout = 7200 * crl::time(1000);
+constexpr auto kLoadExceptionsAfter = 100;
+constexpr auto kLoadExceptionsPerRequest = 100;
 
 } // namespace
 
@@ -344,8 +348,12 @@ void ChatFilters::applyRemove(int position) {
 }
 
 bool ChatFilters::applyChange(ChatFilter &filter, ChatFilter &&updated) {
-	const auto rulesChanged = (filter.flags() != updated.flags())
+	Expects(filter.id() == updated.id());
-		|| (filter.always() != updated.always())
+
+	const auto id = filter.id();
+	const auto exceptionsChanged = filter.always() != updated.always();
+	const auto rulesChanged = exceptionsChanged
+		|| (filter.flags() != updated.flags())
 		|| (filter.never() != updated.never());
 	const auto pinnedChanged = (filter.pinned() != updated.pinned());
 	if (!rulesChanged
@@ -355,7 +363,6 @@ bool ChatFilters::applyChange(ChatFilter &filter, ChatFilter &&updated) {
 		return false;
 	}
 	if (rulesChanged) {
-		const auto id = filter.id();
 		const auto filterList = _owner->chatsFilters().chatsList(id);
 		const auto feedHistory = [&](not_null<History*> history) {
 			const auto now = updated.contains(history);
@@ -379,9 +386,14 @@ bool ChatFilters::applyChange(ChatFilter &filter, ChatFilter &&updated) {
 		if (const auto folder = _owner->folderLoaded(Data::Folder::kId)) {
 			feedList(folder->chatsList());
 		}
+		if (exceptionsChanged && !updated.always().empty()) {
+			_exceptionsToLoad.push_back(id);
+			Ui::PostponeCall(&_owner->session(), [=] {
+				_owner->session().api().requestMoreDialogsIfNeeded();
+			});
+		}
 	}
 	if (pinnedChanged) {
-		const auto id = filter.id();
 		const auto filterList = _owner->chatsFilters().chatsList(id);
 		filterList->pinned()->applyList(updated.pinned());
 	}
@@ -496,6 +508,56 @@ rpl::producer<> ChatFilters::changed() const {
 	return _listChanged.events();
 }
 
+bool ChatFilters::loadNextExceptions(bool chatsListLoaded) {
+	if (_exceptionsLoadRequestId) {
+		return true;
+	} else if (!chatsListLoaded
+		&& (_owner->chatsList()->fullSize().current()
+			< kLoadExceptionsAfter)) {
+		return false;
+	}
+	auto inputs = QVector<MTPInputDialogPeer>();
+	const auto collectExceptions = [&](FilterId id) {
+		auto result = QVector<MTPInputDialogPeer>();
+		const auto i = ranges::find(_list, id, &ChatFilter::id);
+		if (i != end(_list)) {
+			result.reserve(i->always().size());
+			for (const auto history : i->always()) {
+				if (!history->folderKnown()) {
+					inputs.push_back(
+						MTP_inputDialogPeer(history->peer->input));
+				}
+			}
+		}
+		return result;
+	};
+	while (!_exceptionsToLoad.empty()) {
+		const auto id = _exceptionsToLoad.front();
+		const auto exceptions = collectExceptions(id);
+		if (inputs.size() + exceptions.size() > kLoadExceptionsPerRequest) {
+			Assert(!inputs.isEmpty());
+			break;
+		}
+		_exceptionsToLoad.pop_front();
+		inputs.append(exceptions);
+	}
+	if (inputs.isEmpty()) {
+		return false;
+	}
+	const auto api = &_owner->session().api();
+	_exceptionsLoadRequestId = api->request(MTPmessages_GetPeerDialogs(
+		MTP_vector(inputs)
+	)).done([=](const MTPmessages_PeerDialogs &result) {
+		_exceptionsLoadRequestId = 0;
+		_owner->session().data().histories().applyPeerDialogs(result);
+		_owner->session().api().requestMoreDialogsIfNeeded();
+	}).fail([=](const RPCError &error) {
+		_exceptionsLoadRequestId = 0;
+		_owner->session().api().requestMoreDialogsIfNeeded();
+	}).send();
+	return true;
+}
+
 void ChatFilters::refreshHistory(not_null<History*> history) {
 	_refreshHistoryRequests.fire_copy(history);
 }

Telegram/SourceFiles/data/data_chat_filters.h

@@ -102,6 +102,8 @@ public:
 	[[nodiscard]] const std::vector<ChatFilter> &list() const;
 	[[nodiscard]] rpl::producer<> changed() const;
 
+	bool loadNextExceptions(bool chatsListLoaded);
+
 	void refreshHistory(not_null<History*> history);
 	[[nodiscard]] auto refreshHistoryRequests() const
 		-> rpl::producer<not_null<History*>>;
@@ -146,6 +148,9 @@ private:
 	rpl::event_stream<> _suggestedUpdated;
 	crl::time _suggestedLastReceived = 0;
 
+	std::deque<FilterId> _exceptionsToLoad;
+	mtpRequestId _exceptionsLoadRequestId = 0;
+
 };
 
 } // namespace Data

Telegram/SourceFiles/data/data_histories.h

@@ -39,6 +39,8 @@ public:
 	[[nodiscard]] History *find(PeerId peerId);
 	[[nodiscard]] not_null<History*> findOrCreate(PeerId peerId);
 
+	void applyPeerDialogs(const MTPmessages_PeerDialogs &dialogs);
+
 	void unloadAll();
 	void clearAll();
 
@@ -108,7 +110,6 @@ private:
 	void postponeRequestDialogEntries();
 
 	void sendDialogRequests();
-	void applyPeerDialogs(const MTPmessages_PeerDialogs &dialogs);
 
 	const not_null<Session*> _owner;