tdesktop/Telegram/SourceFiles/storage/storage_accounts.h

/*
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

namespace MTP {
class AuthKey;
using AuthKeyPtr = std::shared_ptr<AuthKey>;
} // namespace MTP

namespace Main {
class Account;
class Accounts;
} // namespace Main

namespace Storage {

enum class StartResult : uchar {
	Success,
	IncorrectPasscode,
};

class Accounts final {
public:
	Accounts(not_null<Main::Accounts*> owner, const QString &dataName);
	~Accounts();

	[[nodiscard]] StartResult start(
		const QByteArray &passcode,
		Fn<void(int, std::unique_ptr<Main::Account>)> callback);
	void startAdded(not_null<Main::Account*> account);
	void writeAccounts();

	[[nodiscard]] bool checkPasscode(const QByteArray &passcode) const;
	void setPasscode(const QByteArray &passcode);

	[[nodiscard]] int oldVersion() const;
	void clearOldVersion();

private:
	enum class StartModernResult {
		Success,
		IncorrectPasscode,
		Failed,
		Empty,
	};

	[[nodiscard]] StartModernResult startModern(
		const QByteArray &passcode,
		Fn<void(int, std::unique_ptr<Main::Account>)> callback);
	void startWithSingleAccount(
		const QByteArray &passcode,
		Fn<void(int, std::unique_ptr<Main::Account>)> callback,
		std::unique_ptr<Main::Account> account);
	void generateLocalKey();
	void encryptLocalKey(const QByteArray &passcode);
	void writeInfo();

	const not_null<Main::Accounts*> _owner;
	const QString _dataName;

	MTP::AuthKeyPtr _localKey;
	MTP::AuthKeyPtr _passcodeKey;
	QByteArray _passcodeKeySalt;
	QByteArray _passcodeKeyEncrypted;
	int _oldVersion = 0;

};

} // namespace Storage