Load filters before creating session on log in.

Telegram/SourceFiles/data/data_chat_filters.cpp

@@ -216,7 +216,7 @@ bool ChatFilter::contains(not_null<History*> history) const {
 }
 
 ChatFilters::ChatFilters(not_null<Session*> owner) : _owner(owner) {
-	load();
+	crl::on_main(&owner->session(), [=] { load(); });
 }
 
 ChatFilters::~ChatFilters() = default;
@@ -232,6 +232,16 @@ not_null<Dialogs::MainList*> ChatFilters::chatsList(FilterId filterId) {
 	return pointer.get();
 }
 
+void ChatFilters::setPreloaded(const QVector<MTPDialogFilter> &result) {
+	_loadRequestId = -1;
+	received(result);
+	crl::on_main(&_owner->session(), [=] {
+		if (_loadRequestId == -1) {
+			_loadRequestId = 0;
+		}
+	});
+}
+
 void ChatFilters::load() {
 	load(false);
 }
@@ -244,40 +254,44 @@ void ChatFilters::load(bool force) {
 	api.request(_loadRequestId).cancel();
 	_loadRequestId = api.request(MTPmessages_GetDialogFilters(
 	)).done([=](const MTPVector<MTPDialogFilter> &result) {
-		auto position = 0;
-		auto changed = false;
-		for (const auto &filter : result.v) {
-			auto parsed = ChatFilter::FromTL(filter, _owner);
-			const auto b = begin(_list) + position, e = end(_list);
-			const auto i = ranges::find(b, e, parsed.id(), &ChatFilter::id);
-			if (i == e) {
-				applyInsert(std::move(parsed), position);
-				changed = true;
-			} else if (i == b) {
-				if (applyChange(*b, std::move(parsed))) {
-					changed = true;
-				}
-			} else {
-				std::swap(*i, *b);
-				applyChange(*b, std::move(parsed));
-				changed = true;
-			}
-			++position;
-		}
-		while (position < _list.size()) {
-			applyRemove(position);
-			changed = true;
-		}
-		if (changed || !_loaded) {
-			_loaded = true;
-			_listChanged.fire({});
-		}
+		received(result.v);
 		_loadRequestId = 0;
 	}).fail([=](const RPCError &error) {
 		_loadRequestId = 0;
 	}).send();
 }
 
+void ChatFilters::received(const QVector<MTPDialogFilter> &list) {
+	auto position = 0;
+	auto changed = false;
+	for (const auto &filter : list) {
+		auto parsed = ChatFilter::FromTL(filter, _owner);
+		const auto b = begin(_list) + position, e = end(_list);
+		const auto i = ranges::find(b, e, parsed.id(), &ChatFilter::id);
+		if (i == e) {
+			applyInsert(std::move(parsed), position);
+			changed = true;
+		} else if (i == b) {
+			if (applyChange(*b, std::move(parsed))) {
+				changed = true;
+			}
+		} else {
+			std::swap(*i, *b);
+			applyChange(*b, std::move(parsed));
+			changed = true;
+		}
+		++position;
+	}
+	while (position < _list.size()) {
+		applyRemove(position);
+		changed = true;
+	}
+	if (changed || !_loaded) {
+		_loaded = true;
+		_listChanged.fire({});
+	}
+}
+
 void ChatFilters::apply(const MTPUpdate &update) {
 	update.match([&](const MTPDupdateDialogFilter &data) {
 		if (const auto filter = data.vfilter()) {

Telegram/SourceFiles/data/data_chat_filters.h

@@ -95,6 +95,8 @@ public:
 	explicit ChatFilters(not_null<Session*> owner);
 	~ChatFilters();
 
+	void setPreloaded(const QVector<MTPDialogFilter> &result);
+
 	void load();
 	void apply(const MTPUpdate &update);
 	void set(ChatFilter filter);
@@ -125,6 +127,7 @@ public:
 
 private:
 	void load(bool force);
+	void received(const QVector<MTPDialogFilter> &list);
 	bool applyOrder(const QVector<MTPint> &order);
 	bool applyChange(ChatFilter &filter, ChatFilter &&updated);
 	void applyInsert(ChatFilter filter, int position);

Telegram/SourceFiles/intro/intro_step.cpp

@@ -27,6 +27,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/effects/slide_animation.h"
 #include "data/data_user.h"
 #include "data/data_auto_download.h"
+#include "data/data_session.h"
+#include "data/data_chat_filters.h"
 #include "window/window_controller.h"
 #include "window/themes/window_theme.h"
 #include "app.h"
@@ -160,6 +162,18 @@ void Step::finish(const MTPUser &user, QImage &&photo) {
 		}
 	}
 
+	api().request(MTPmessages_GetDialogFilters(
+	)).done([=](const MTPVector<MTPDialogFilter> &result) {
+		createSession(user, photo, result.v);
+	}).fail([=](const RPCError &error) {
+		createSession(user, photo, QVector<MTPDialogFilter>());
+	}).send();
+}
+
+void Step::createSession(
+		const MTPUser &user,
+		QImage photo,
+		const QVector<MTPDialogFilter> &filters) {
 	// Save the default language if we've suggested some other and user ignored it.
 	const auto currentId = Lang::Current().id();
 	const auto defaultId = Lang::DefaultLanguageId();
@@ -168,12 +182,19 @@ void Step::finish(const MTPUser &user, QImage &&photo) {
 		Lang::Current().switchToId(Lang::DefaultLanguage());
 		Local::writeLangPack();
 	}
+
+	auto settings = std::make_unique<Main::SessionSettings>();
+	settings->setDialogsFiltersEnabled(!filters.isEmpty());
+
 	const auto account = _account;
-	account->createSession(user);
+	account->createSession(user, std::move(settings));
 
 	// "this" is already deleted here by creating the main widget.
 	account->local().writeMtpData();
 	auto &session = account->session();
+	if (!filters.isEmpty()) {
+		session.data().chatsFilters().setPreloaded(filters);
+	}
 	if (!photo.isNull()) {
 		session.api().uploadPeerPhoto(session.user(), std::move(photo));
 	}

Telegram/SourceFiles/intro/intro_step.h

@@ -106,6 +106,10 @@ protected:
 		return _data;
 	}
 	void finish(const MTPUser &user, QImage &&photo = QImage());
+	void createSession(
+		const MTPUser &user,
+		QImage photo,
+		const QVector<MTPDialogFilter> &filters);
 
 	void goBack();
 

Telegram/SourceFiles/main/main_account.cpp

@@ -131,8 +131,14 @@ uint64 Account::willHaveSessionUniqueId(MTP::Config *config) const {
 		| (config && config->isTestMode() ? 0x0100'0000'0000'0000ULL : 0ULL);
 }
 
-void Account::createSession(const MTPUser &user) {
-	createSession(user, QByteArray(), 0, std::make_unique<SessionSettings>());
+void Account::createSession(
+		const MTPUser &user,
+		std::unique_ptr<SessionSettings> settings) {
+	createSession(
+		user,
+		QByteArray(),
+		0,
+		settings ? std::move(settings) : std::make_unique<SessionSettings>());
 }
 
 void Account::createSession(

Telegram/SourceFiles/main/main_account.h

@@ -49,7 +49,9 @@ public:
 	void start(std::unique_ptr<MTP::Config> config);
 
 	[[nodiscard]] uint64 willHaveSessionUniqueId(MTP::Config *config) const;
-	void createSession(const MTPUser &user);
+	void createSession(
+		const MTPUser &user,
+		std::unique_ptr<SessionSettings> settings = nullptr);
 	void createSession(
 		UserId id,
 		QByteArray serialized,