Use abstract export writer for different formats.

Telegram/SourceFiles/export/data/export_data_types.cpp

@@ -0,0 +1,80 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "export/data/export_data_types.h"
+
+namespace App { // Hackish..
+QString formatPhone(QString phone);
+} // namespace App
+
+namespace Export {
+namespace Data {
+
+Utf8String ParseString(const MTPstring &data) {
+	return data.v;
+}
+
+PersonalInfo ParsePersonalInfo(const MTPUserFull &data) {
+	Expects(data.type() == mtpc_userFull);
+
+	const auto &fields = data.c_userFull();
+	const auto &small = fields.vuser.c_user();
+	auto result = PersonalInfo();
+	if (small.has_first_name()) {
+		result.firstName = ParseString(small.vfirst_name);
+	}
+	if (small.has_last_name()) {
+		result.lastName = ParseString(small.vlast_name);
+	}
+	if (small.has_phone()) {
+		result.phoneNumber = ParseString(small.vphone);
+	}
+	if (small.has_username()) {
+		result.username = ParseString(small.vusername);
+	}
+	if (fields.has_about()) {
+		result.bio = ParseString(fields.vabout);
+	}
+	return result;
+}
+
+UserpicsSlice ParseUserpicsSlice(const MTPVector<MTPPhoto> &data) {
+	const auto &list = data.v;
+	auto result = UserpicsSlice();
+	result.list.reserve(list.size());
+	for (const auto &photo : list) {
+		switch (photo.type()) {
+		case mtpc_photo: {
+			const auto &fields = photo.c_photo();
+			auto userpic = Userpic();
+			userpic.id = fields.vid.v;
+			userpic.date = QDateTime::fromTime_t(fields.vdate.v);
+			userpic.image = File{ "(not saved)" };
+			result.list.push_back(std::move(userpic));
+		} break;
+
+		case mtpc_photoEmpty: {
+			const auto &fields = photo.c_photoEmpty();
+			auto userpic = Userpic();
+			userpic.id = fields.vid.v;
+			result.list.push_back(std::move(userpic));
+		} break;
+
+		default: Unexpected("Photo type in ParseUserpicsSlice.");
+		}
+	}
+	return result;
+}
+
+Utf8String FormatPhoneNumber(const Utf8String &phoneNumber) {
+	return phoneNumber.isEmpty()
+		? Utf8String()
+		: App::formatPhone(QString::fromUtf8(phoneNumber)).toUtf8();
+}
+
+} // namespace Data
+} // namespace Export

Telegram/SourceFiles/export/data/export_data_types.h

@@ -0,0 +1,113 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "scheme.h"
+
+#include <QtCore/QDateTime>
+#include <QtCore/QString>
+#include <QtCore/QByteArray>
+#include <vector>
+
+namespace Export {
+namespace Data {
+
+using Utf8String = QByteArray;
+
+Utf8String ParseString(const MTPstring &data);
+
+template <typename Type>
+inline auto NumberToString(Type value)
+-> std::enable_if_t<std::is_arithmetic_v<Type>, Utf8String> {
+	const auto result = std::to_string(value);
+	return QByteArray(result.data(), int(result.size()));
+}
+
+struct PersonalInfo {
+	Utf8String firstName;
+	Utf8String lastName;
+	Utf8String phoneNumber;
+	Utf8String username;
+	Utf8String bio;
+};
+
+PersonalInfo ParsePersonalInfo(const MTPUserFull &data);
+
+struct UserpicsInfo {
+	int count = 0;
+};
+
+struct File {
+	QString relativePath;
+};
+
+struct Userpic {
+	uint64 id = 0;
+	QDateTime date;
+	File image;
+};
+
+struct UserpicsSlice {
+	std::vector<Userpic> list;
+};
+
+UserpicsSlice ParseUserpicsSlice(const MTPVector<MTPPhoto> &data);
+
+struct Contact {
+	Utf8String firstName;
+	Utf8String lastName;
+	Utf8String phoneNumber;
+};
+
+struct ContactsList {
+	std::vector<Contact> list;
+};
+
+struct Session {
+	Utf8String platform;
+	Utf8String deviceModel;
+	Utf8String systemVersion;
+	Utf8String applicationName;
+	Utf8String applicationVersion;
+	QDateTime created;
+	QDateTime lastActive;
+	Utf8String ip;
+	Utf8String country;
+	Utf8String region;
+};
+
+struct SessionsList {
+	std::vector<Session> list;
+};
+
+struct ChatsInfo {
+	int count = 0;
+};
+
+struct ChatInfo {
+	enum class Type {
+		Personal,
+		Group,
+		Channel,
+	};
+	Type type = Type::Personal;
+	QString name;
+};
+
+struct Message {
+	int id = 0;
+};
+
+struct MessagesSlice {
+	std::vector<Message> list;
+};
+
+Utf8String FormatPhoneNumber(const Utf8String &phoneNumber);
+
+} // namespace Data
+} // namespace Export

Telegram/SourceFiles/export/export_controller.cpp

@@ -8,10 +8,17 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "export/export_controller.h"
 
 #include "export/export_settings.h"
+#include "export/data/export_data_types.h"
+#include "export/output/export_output_abstract.h"
 #include "mtproto/rpc_sender.h"
 #include "mtproto/concurrent_sender.h"
 
 namespace Export {
+namespace {
+
+constexpr auto kUserpicsSliceLimit = 100;
+
+} // namespace
 
 class Controller {
 public:
@@ -30,6 +37,8 @@ public:
 	void startExport(const Settings &settings);
 
 private:
+	using Step = ProcessingState::Step;
+
 	void setState(State &&state);
 	void apiError(const RPCError &error);
 	void apiError(const QString &error);
@@ -39,6 +48,18 @@ private:
 	void requestPasswordState();
 	void passwordStateDone(const MTPaccount_Password &password);
 
+	void fillExportSteps();
+	void exportNext();
+	void exportPersonalInfo();
+	void exportUserpics();
+	void exportContacts();
+	void exportSessions();
+	void exportChats();
+
+	void exportUserpicsSlice(const MTPphotos_Photos &result);
+
+	bool normalizePath();
+
 	MTP::ConcurrentSender _mtp;
 	Settings _settings;
 
@@ -48,6 +69,12 @@ private:
 
 	mtpRequestId _passwordRequestId = 0;
 
+	std::unique_ptr<Output::AbstractWriter> _writer;
+	std::vector<ProcessingState::Step> _steps;
+	int _stepIndex = -1;
+
+	MTPInputUser _user = MTP_inputUserSelf();
+
 };
 
 Controller::Controller(crl::weak_on_queue<Controller> weak)
@@ -130,47 +157,197 @@ void Controller::cancelUnconfirmedPassword() {
 
 void Controller::startExport(const Settings &settings) {
 	_settings = base::duplicate(settings);
-	setState(ProcessingState());
 
+	if (!normalizePath()) {
+		ioError(_settings.path);
+		return;
+	}
+	_writer = Output::CreateWriter(_settings.format);
+	fillExportSteps();
+	exportNext();
+}
+
+bool Controller::normalizePath() {
+	const auto check = [&] {
+		return QDir().mkpath(_settings.path);
+	};
+	QDir folder(_settings.path);
+	const auto path = folder.absolutePath();
+	_settings.path = path + '/';
+	if (!folder.exists()) {
+		return check();
+	}
+	const auto list = folder.entryInfoList();
+	if (list.isEmpty()) {
+		return true;
+	}
+	const auto date = QDate::currentDate();
+	const auto base = QString("DataExport.%1.%2.%3"
+	).arg(date.day(), 2, 10, QChar('0')
+	).arg(date.month(), 2, 10, QChar('0')
+	).arg(date.year());
+	const auto add = [&](int i) {
+		return base + (i ? " (" + QString::number(i) + ')' : QString());
+	};
+	auto index = 0;
+	while (QDir(_settings.path + add(index)).exists()) {
+		++index;
+	}
+	_settings.path += add(index) + '/';
+	return check();
+}
+
+void Controller::fillExportSteps() {
+	using Type = Settings::Type;
+	if (_settings.types & Type::PersonalInfo) {
+		_steps.push_back(Step::PersonalInfo);
+	}
+	if (_settings.types & Type::Userpics) {
+		_steps.push_back(Step::Userpics);
+	}
+	if (_settings.types & Type::Contacts) {
+		_steps.push_back(Step::Contacts);
+	}
+	if (_settings.types & Type::Sessions) {
+		_steps.push_back(Step::Sessions);
+	}
+	const auto chatTypes = Type::PersonalChats
+		| Type::PrivateGroups
+		| Type::PublicGroups
+		| Type::MyChannels;
+	if (_settings.types & chatTypes) {
+		_steps.push_back(Step::Chats);
+	}
+}
+
+void Controller::exportNext() {
+	if (!++_stepIndex) {
+		_writer->start(_settings.path);
+	}
+	if (_stepIndex >= _steps.size()) {
+		_writer->finish();
+		setFinishedState();
+		return;
+	}
+	const auto step = _steps[_stepIndex];
+	switch (step) {
+	case Step::PersonalInfo: return exportPersonalInfo();
+	case Step::Userpics: return exportUserpics();
+	case Step::Contacts: return exportContacts();
+	case Step::Sessions: return exportSessions();
+	case Step::Chats: return exportChats();
+	}
+	Unexpected("Step in Controller::exportNext.");
+}
+
+void Controller::exportPersonalInfo() {
+	if (!(_settings.types & Settings::Type::PersonalInfo)) {
+		exportUserpics();
+		return;
+	}
 	_mtp.request(MTPusers_GetFullUser(
-		MTP_inputUserSelf()
+		_user
 	)).done([=](const MTPUserFull &result) {
 		Expects(result.type() == mtpc_userFull);
 
 		const auto &full = result.c_userFull();
-		if (full.vuser.type() != mtpc_user) {
+		if (full.vuser.type() == mtpc_user) {
+			_writer->writePersonal(Data::ParsePersonalInfo(result));
+			exportNext();
+		} else {
 			apiError("Bad user type.");
-			return;
 		}
-		const auto &user = full.vuser.c_user();
-
-		QFile f(_settings.path + "personal.txt");
-		if (!f.open(QIODevice::WriteOnly)) {
-			ioError(f.fileName());
-			return;
-		}
-		QTextStream stream(&f);
-		stream.setCodec("UTF-8");
-		if (user.has_first_name()) {
-			stream << "First name: " << qs(user.vfirst_name) << "\n";
-		}
-		if (user.has_last_name()) {
-			stream << "Last name: " << qs(user.vlast_name) << "\n";
-		}
-		if (user.has_phone()) {
-			stream << "Phone number: " << qs(user.vphone) << "\n";
-		}
-		if (user.has_username()) {
-			stream << "Username: @" << qs(user.vusername) << "\n";
-		}
-		setFinishedState();
 	}).fail([=](const RPCError &error) {
 		apiError(error);
 	}).send();
 }
 
+void Controller::exportUserpics() {
+	_mtp.request(MTPphotos_GetUserPhotos(
+		_user,
+		MTP_int(0),
+		MTP_long(0),
+		MTP_int(kUserpicsSliceLimit)
+	)).done([=](const MTPphotos_Photos &result) {
+		_writer->writeUserpicsStart([&] {
+			auto info = Data::UserpicsInfo();
+			switch (result.type()) {
+			case mtpc_photos_photos: {
+				const auto &data = result.c_photos_photos();
+				info.count = data.vphotos.v.size();
+			} break;
+
+			case mtpc_photos_photosSlice: {
+				const auto &data = result.c_photos_photosSlice();
+				info.count = data.vcount.v;
+			} break;
+
+			default: Unexpected("Photos type in Controller::exportUserpics.");
+			}
+			return info;
+		}());
+
+		exportUserpicsSlice(result);
+	}).fail([=](const RPCError &error) {
+		apiError(error);
+	}).send();
+}
+
+void Controller::exportUserpicsSlice(const MTPphotos_Photos &result) {
+	const auto finish = [&] {
+		_writer->writeUserpicsEnd();
+		exportNext();
+	};
+	switch (result.type()) {
+	case mtpc_photos_photos: {
+		const auto &data = result.c_photos_photos();
+
+		_writer->writeUserpicsSlice(
+			Data::ParseUserpicsSlice(data.vphotos));
+
+		finish();
+	} break;
+
+	case mtpc_photos_photosSlice: {
+		const auto &data = result.c_photos_photosSlice();
+
+		const auto slice = Data::ParseUserpicsSlice(data.vphotos);
+		_writer->writeUserpicsSlice(slice);
+
+		if (slice.list.empty()) {
+			finish();
+		} else {
+			_mtp.request(MTPphotos_GetUserPhotos(
+				_user,
+				MTP_int(0),
+				MTP_long(slice.list.back().id),
+				MTP_int(kUserpicsSliceLimit)
+			)).done([=](const MTPphotos_Photos &result) {
+				exportUserpicsSlice(result);
+			}).fail([=](const RPCError &error) {
+				apiError(error);
+			}).send();
+		}
+	} break;
+
+	default: Unexpected("Photos type in Controller::exportUserpicsSlice.");
+	}
+}
+
+void Controller::exportContacts() {
+	exportNext();
+}
+
+void Controller::exportSessions() {
+	exportNext();
+}
+
+void Controller::exportChats() {
+	exportNext();
+}
+
 void Controller::setFinishedState() {
-	setState(FinishedState{ _settings.path });
+	setState(FinishedState{ _writer->mainFilePath() });
 }
 
 ControllerWrap::ControllerWrap() {

Telegram/SourceFiles/export/export_controller.h

@@ -28,7 +28,7 @@ struct PasswordCheckState {
 struct ProcessingState {
 	enum class Step {
 		PersonalInfo,
-		Avatars,
+		Userpics,
 		Contacts,
 		Sessions,
 		Chats,

Telegram/SourceFiles/export/export_pch.h

@@ -9,7 +9,11 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include <QtCore/QFile>
 #include <QtCore/QDir>
 #include <QtCore/QTextStream>
+#include <QtCore/QDateTime>
 #include <crl/crl.h>
 #include <rpl/rpl.h>
+#include <vector>
+#include <map>
+
 #include "scheme.h"
 #include "logs.h"

Telegram/SourceFiles/export/export_settings.h

@@ -11,14 +11,17 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/flat_map.h"
 
 namespace Export {
+namespace Output {
+enum class Format;
+} // namespace Output
 
 struct MediaSettings {
 	enum class Type {
-		Photo,
+		Photo   = 0x01,
-		Video,
+		Video   = 0x02,
-		Sticker,
+		Sticker = 0x04,
-		GIF,
+		GIF     = 0x08,
-		File,
+		File    = 0x10,
 	};
 	using Types = base::flags<Type>;
 	friend inline constexpr auto is_flag_type(Type) { return true; };
@@ -34,19 +37,20 @@ struct MediaSettings {
 
 struct Settings {
 	enum class Type {
-		PersonalInfo,
+		PersonalInfo  = 0x01,
-		Avatars,
+		Userpics      = 0x02,
-		Contacts,
+		Contacts      = 0x04,
-		Sessions,
+		Sessions      = 0x08,
-		PersonalChats,
+		PersonalChats = 0x10,
-		PrivateGroups,
+		PrivateGroups = 0x20,
-		PublicGroups,
+		PublicGroups  = 0x40,
-		MyChannels,
+		MyChannels    = 0x80,
 	};
 	using Types = base::flags<Type>;
 	friend inline constexpr auto is_flag_type(Type) { return true; };
 
 	QString path;
+	Output::Format format = Output::Format();
 
 	Types types = DefaultTypes();
 	MediaSettings defaultMedia;
@@ -54,7 +58,7 @@ struct Settings {
 
 	static inline Types DefaultTypes() {
 		return Type::PersonalInfo
-			| Type::Avatars
+			| Type::Userpics
 			| Type::Contacts
 			| Type::Sessions
 			| Type::PersonalChats;

Telegram/SourceFiles/export/output/export_output_abstract.cpp

@@ -0,0 +1,20 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "export/output/export_output_abstract.h"
+
+#include "export/output/export_output_text.h"
+
+namespace Export {
+namespace Output {
+
+std::unique_ptr<AbstractWriter> CreateWriter(Format format) {
+	return std::make_unique<TextWriter>();
+}
+
+} // namespace Output
+} // namespace Export

Telegram/SourceFiles/export/output/export_output_abstract.h

@@ -0,0 +1,63 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include <QtCore/QString>
+
+namespace Export {
+namespace Data {
+struct PersonalInfo;
+struct UserpicsInfo;
+struct UserpicsSlice;
+struct ContactsList;
+struct SessionsList;
+struct ChatsInfo;
+struct ChatInfo;
+struct MessagesSlice;
+} // namespace Data
+
+namespace Output {
+
+enum class Format {
+	Text,
+	Html,
+	Json,
+};
+
+class AbstractWriter {
+public:
+	virtual bool start(const QString &folder) = 0;
+
+	virtual bool writePersonal(const Data::PersonalInfo &data) = 0;
+
+	virtual bool writeUserpicsStart(const Data::UserpicsInfo &data) = 0;
+	virtual bool writeUserpicsSlice(const Data::UserpicsSlice &data) = 0;
+	virtual bool writeUserpicsEnd() = 0;
+
+	virtual bool writeContactsList(const Data::ContactsList &data) = 0;
+
+	virtual bool writeSessionsList(const Data::SessionsList &data) = 0;
+
+	virtual bool writeChatsStart(const Data::ChatsInfo &data) = 0;
+	virtual bool writeChatStart(const Data::ChatInfo &data) = 0;
+	virtual bool writeMessagesSlice(const Data::MessagesSlice &data) = 0;
+	virtual bool writeChatEnd() = 0;
+	virtual bool writeChatsEnd() = 0;
+
+	virtual bool finish() = 0;
+
+	virtual QString mainFilePath() = 0;
+
+	virtual ~AbstractWriter() = default;
+
+};
+
+std::unique_ptr<AbstractWriter> CreateWriter(Format format);
+
+} // namespace Output
+} // namespace Export

Telegram/SourceFiles/export/output/export_output_file.cpp

@@ -0,0 +1,55 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "export/output/export_output_file.h"
+
+#include <gsl/gsl_util>
+
+namespace Export {
+namespace Output {
+
+File::File(const QString &path) : _path(path) {
+}
+
+File::Result File::writeBlock(const QByteArray &block) {
+	const auto result = writeBlockAttempt(block);
+	if (result != Result::Success) {
+		_file.clear();
+	}
+	return result;
+}
+
+File::Result File::writeBlockAttempt(const QByteArray &block) {
+	if (const auto result = reopen(); result != Result::Success) {
+		return result;
+	}
+	return (_file->write(block) == block.size() && _file->flush())
+		? Result::Success
+		: Result::Error;
+}
+
+File::Result File::reopen() {
+	if (_file && _file->isOpen()) {
+		return Result::Success;
+	}
+	_file.emplace(_path);
+	if (_file->exists()) {
+		if (_file->size() < _offset) {
+			return Result::FatalError;
+		} else if (!_file->resize(_offset)) {
+			return Result::Error;
+		}
+	} else if (_offset > 0) {
+		return Result::FatalError;
+	}
+	return _file->open(QIODevice::Append)
+		? Result::Success
+		: Result::Error;
+}
+
+} // namespace Output
+} // namespace File

Telegram/SourceFiles/export/output/export_output_file.h

@@ -0,0 +1,41 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "base/optional.h"
+
+#include <QtCore/QFile>
+#include <QtCore/QString>
+#include <QtCore/QByteArray>
+
+namespace Export {
+namespace Output {
+
+class File {
+public:
+	File(const QString &path);
+
+	enum class Result {
+		Success,
+		Error,
+		FatalError,
+	};
+	Result writeBlock(const QByteArray &block);
+
+private:
+	Result reopen();
+	Result writeBlockAttempt(const QByteArray &block);
+
+	QString _path;
+	int _offset = 0;
+	base::optional<QFile> _file;
+
+};
+
+} // namespace Output
+} // namespace File

Telegram/SourceFiles/export/output/export_output_text.cpp

@@ -0,0 +1,154 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "export/output/export_output_text.h"
+
+#include "export/data/export_data_types.h"
+
+#include <QtCore/QFile>
+
+namespace Export {
+namespace Output {
+namespace {
+
+#ifdef Q_OS_WIN
+const auto kLineBreak = QByteArrayLiteral("\r\n");
+#else // Q_OS_WIN
+const auto kLineBreak = QByteArrayLiteral("\n");
+#endif // Q_OS_WIN
+
+void SerializeMultiline(
+		QByteArray &appendTo,
+		const QByteArray &value,
+		int newline) {
+	const auto data = value.data();
+	auto offset = 0;
+	do {
+		appendTo.append("> ");
+		appendTo.append(data + offset, newline).append(kLineBreak);
+		offset = newline + 1;
+		newline = value.indexOf('\n', offset);
+	} while (newline > 0);
+}
+
+QByteArray SerializeKeyValue(
+		std::vector<std::pair<QByteArray, QByteArray>> &&values) {
+	auto result = QByteArray();
+	for (const auto &[key, value] : values) {
+		if (value.isEmpty()) {
+			continue;
+		}
+		result.append(key);
+		if (const auto newline = value.indexOf('\n'); newline >= 0) {
+			result.append(':').append(kLineBreak);
+			SerializeMultiline(result, value, newline);
+		} else {
+			result.append(": ").append(value).append(kLineBreak);
+		}
+	}
+	return result;
+}
+
+Data::Utf8String FormatUsername(const Data::Utf8String &username) {
+	return username.isEmpty() ? username : ('@' + username);
+}
+
+} // namespace
+
+bool TextWriter::start(const QString &folder) {
+	Expects(folder.endsWith('/'));
+
+	_folder = folder;
+	_result = std::make_unique<File>(_folder + "result.txt");
+	return true;
+}
+
+bool TextWriter::writePersonal(const Data::PersonalInfo &data) {
+	Expects(_result != nullptr);
+
+	const auto serialized = "Personal information"
+		+ kLineBreak
+		+ kLineBreak
+		+ SerializeKeyValue({
+		{ "First name", data.firstName },
+		{ "Last name", data.lastName },
+		{ "Phone number", Data::FormatPhoneNumber(data.phoneNumber) },
+		{ "Username", FormatUsername(data.username) },
+		{ "Bio", data.bio },
+		})
+		+ kLineBreak;
+	return _result->writeBlock(serialized) == File::Result::Success;
+}
+
+bool TextWriter::writeUserpicsStart(const Data::UserpicsInfo &data) {
+	Expects(_result != nullptr);
+
+	_userpicsCount = data.count;
+	if (!_userpicsCount) {
+		return true;
+	}
+	const auto serialized = "Personal photos "
+		"(" + Data::NumberToString(_userpicsCount) + ")"
+		+ kLineBreak
+		+ kLineBreak;
+	return _result->writeBlock(serialized) == File::Result::Success;
+}
+
+bool TextWriter::writeUserpicsSlice(const Data::UserpicsSlice &data) {
+	auto lines = QByteArray();
+	for (const auto &userpic : data.list) {
+		lines.append(userpic.date.toString().toUtf8()).append(": ");
+		lines.append(userpic.image.relativePath.toUtf8());
+		lines.append(kLineBreak);
+	}
+	return _result->writeBlock(lines) == File::Result::Success;
+}
+
+bool TextWriter::writeUserpicsEnd() {
+	return (_userpicsCount > 0)
+		? _result->writeBlock(kLineBreak) == File::Result::Success
+		: true;
+}
+
+bool TextWriter::writeContactsList(const Data::ContactsList &data) {
+	return true;
+}
+
+bool TextWriter::writeSessionsList(const Data::SessionsList &data) {
+	return true;
+}
+
+bool TextWriter::writeChatsStart(const Data::ChatsInfo &data) {
+	return true;
+}
+
+bool TextWriter::writeChatStart(const Data::ChatInfo &data) {
+	return true;
+}
+
+bool TextWriter::writeMessagesSlice(const Data::MessagesSlice &data) {
+	return true;
+}
+
+bool TextWriter::writeChatEnd() {
+	return true;
+}
+
+bool TextWriter::writeChatsEnd() {
+	return true;
+}
+
+bool TextWriter::finish() {
+	return true;
+}
+
+QString TextWriter::mainFilePath() {
+	return _folder + "result.txt";
+}
+
+} // namespace Output
+} // namespace Export

Telegram/SourceFiles/export/output/export_output_text.h

@@ -0,0 +1,49 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "export/output/export_output_abstract.h"
+#include "export/output/export_output_file.h"
+
+namespace Export {
+namespace Output {
+
+class TextWriter : public AbstractWriter {
+public:
+	bool start(const QString &folder) override;
+
+	bool writePersonal(const Data::PersonalInfo &data) override;
+
+	bool writeUserpicsStart(const Data::UserpicsInfo &data) override;
+	bool writeUserpicsSlice(const Data::UserpicsSlice &data) override;
+	bool writeUserpicsEnd() override;
+
+	bool writeContactsList(const Data::ContactsList &data) override;
+
+	bool writeSessionsList(const Data::SessionsList &data) override;
+
+	bool writeChatsStart(const Data::ChatsInfo &data) override;
+	bool writeChatStart(const Data::ChatInfo &data) override;
+	bool writeMessagesSlice(const Data::MessagesSlice &data) override;
+	bool writeChatEnd() override;
+	bool writeChatsEnd() override;
+
+	bool finish() override;
+
+	QString mainFilePath() override;
+
+private:
+	QString _folder;
+
+	std::unique_ptr<File> _result;
+	int _userpicsCount = 0;
+
+};
+
+} // namespace Output
+} // namespace Export

Telegram/SourceFiles/export/view/export_view_panel_controller.cpp

@@ -74,7 +74,7 @@ void PanelController::updateState(State &&state) {
 
 		done->showClicks(
 		) | rpl::start_with_next([=] {
-			File::ShowInFolder(path + "personal.txt");
+			File::ShowInFolder(path);
 			_panel->hideGetDuration();
 		}, done->lifetime());
 

Telegram/SourceFiles/export/view/export_view_settings.cpp

@@ -65,7 +65,7 @@ void SettingsWidget::setupContent() {
 			refreshButtonsCallback();
 		}, lifetime());
 	};
-	addOption(lng_export_option_info, Type::PersonalInfo | Type::Avatars);
+	addOption(lng_export_option_info, Type::PersonalInfo | Type::Userpics);
 	addOption(lng_export_option_contacts, Type::Contacts);
 	addOption(lng_export_option_sessions, Type::Sessions);
 	refreshButtonsCallback();

Telegram/SourceFiles/mtproto/concurrent_sender.h

@@ -89,6 +89,8 @@ public:
 	template <typename Request>
 	class SpecificRequestBuilder : public RequestBuilder {
 	public:
+		using Response = typename Request::ResponseType;
+
 		SpecificRequestBuilder(
 			const SpecificRequestBuilder &other) = delete;
 		SpecificRequestBuilder(
@@ -102,10 +104,32 @@ public:
 			ShiftedDcId dcId) noexcept;
 		[[nodiscard]] SpecificRequestBuilder &afterDelay(
 			TimeMs ms) noexcept;
+
+#ifdef _DEBUG
+		// Allow code completion to show response type.
+		[[nodiscard]] SpecificRequestBuilder &done(Fn<void()> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &done(Fn<void(
+			mtpRequestId)> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &done(Fn<void(
+			mtpRequestId,
+			Response &&)> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &done(Fn<void(
+			Response &&)> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &fail(Fn<void()> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &fail(Fn<void(
+			mtpRequestId)> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &fail(Fn<void(
+			mtpRequestId,
+			RPCError &&)> &&handler);
+		[[nodiscard]] SpecificRequestBuilder &fail(Fn<void(
+			RPCError &&)> &&handler);
+#else // _DEBUG
 		template <typename Handler>
 		[[nodiscard]] SpecificRequestBuilder &done(Handler &&handler);
 		template <typename Handler>
 		[[nodiscard]] SpecificRequestBuilder &fail(Handler &&handler);
+#endif // _DEBUG
+
 		[[nodiscard]] SpecificRequestBuilder &handleFloodErrors() noexcept;
 		[[nodiscard]] SpecificRequestBuilder &handleAllErrors() noexcept;
 		[[nodiscard]] SpecificRequestBuilder &afterRequest(
@@ -228,6 +252,91 @@ template <typename Request>
 	return *this;
 }
 
+#ifdef _DEBUG
+// Allow code completion to show response type.
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::done(
+	Fn<void(Response &&)> &&handler)
+-> SpecificRequestBuilder & {
+	setDoneHandler<Response>([handler = std::move(handler)](
+			mtpRequestId requestId,
+			Response &&result) mutable {
+		std::move(handler)(std::move(result));
+	});
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::done(
+	Fn<void(mtpRequestId, Response &&)> &&handler)
+-> SpecificRequestBuilder & {
+	setDoneHandler<Response>(std::move(handler));
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::done(
+		Fn<void(mtpRequestId)> &&handler) -> SpecificRequestBuilder & {
+	setDoneHandler<Response>([handler = std::move(handler)](
+			mtpRequestId requestId,
+			Response &&result) mutable {
+		std::move(handler)(requestId);
+	});
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::done(
+		Fn<void()> &&handler) -> SpecificRequestBuilder & {
+	setDoneHandler<Response>([handler = std::move(handler)](
+			mtpRequestId requestId,
+			Response &&result) mutable {
+		std::move(handler)();
+	});
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::fail(
+		Fn<void(RPCError &&)> &&handler) -> SpecificRequestBuilder & {
+	setFailHandler([handler = std::move(handler)](
+			mtpRequestId requestId,
+			RPCError &&error) mutable {
+		std::move(handler)(std::move(error));
+	});
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::fail(
+	Fn<void(mtpRequestId, RPCError &&)> &&handler)
+-> SpecificRequestBuilder & {
+	setFailHandler(std::move(handler));
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::fail(
+		Fn<void(mtpRequestId)> &&handler) -> SpecificRequestBuilder & {
+	setFailHandler([handler = std::move(handler)](
+			mtpRequestId requestId,
+			RPCError &&error) mutable {
+		std::move(handler)(requestId);
+	});
+	return *this;
+}
+
+template <typename Request>
+[[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::fail(
+		Fn<void()> &&handler) -> SpecificRequestBuilder & {
+	setFailHandler([handler = move(handler)](
+			mtpRequestId requestId,
+			RPCError &&error) mutable {
+		std::move(handler)();
+	});
+	return *this;
+}
+#else // _DEBUG
 template <typename Request>
 template <typename Handler>
 [[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::done(
@@ -313,6 +422,8 @@ template <typename Handler>
 	return *this;
 }
 
+#endif // _DEBUG
+
 template <typename Request>
 [[nodiscard]] auto ConcurrentSender::SpecificRequestBuilder<Request>::handleFloodErrors() noexcept
 -> SpecificRequestBuilder & {

Telegram/SourceFiles/ui/widgets/separate_panel.cpp

@@ -206,7 +206,11 @@ void SeparatePanel::showControls() {
 
 void SeparatePanel::finishClose() {
 	hide();
-	_closeEvents.fire({});
+	crl::on_main(this, [=] {
+		if (isHidden() && !_visible && !_opacityAnimation.animating()) {
+			_closeEvents.fire({});
+		}
+	});
 }
 
 int SeparatePanel::hideGetDuration() {

Telegram/gyp/lib_export.gyp

@@ -53,6 +53,14 @@
       '<(src_loc)/export/export_controller.cpp',
       '<(src_loc)/export/export_controller.h',
       '<(src_loc)/export/export_settings.h',
+      '<(src_loc)/export/data/export_data_types.cpp',
+      '<(src_loc)/export/data/export_data_types.h',
+      '<(src_loc)/export/output/export_output_abstract.cpp',
+      '<(src_loc)/export/output/export_output_abstract.h',
+      '<(src_loc)/export/output/export_output_file.cpp',
+      '<(src_loc)/export/output/export_output_file.h',
+      '<(src_loc)/export/output/export_output_text.cpp',
+      '<(src_loc)/export/output/export_output_text.h',
     ],
   }],
 }