Allow restoring password by email in passport.

Telegram/SourceFiles/passport/passport_form_controller.cpp

@@ -10,6 +10,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "passport/passport_encryption.h"
 #include "passport/passport_panel_controller.h"
 #include "boxes/confirm_box.h"
+#include "boxes/passcode_box.h"
 #include "lang/lang_keys.h"
 #include "lang/lang_hardcoded.h"
 #include "base/openssl_help.h"
@@ -392,6 +393,38 @@ void FormController::submitPassword(const QString &password) {
 	}).send();
 }
 
+void FormController::recoverPassword() {
+	if (!_password.hasRecovery) {
+		_view->show(Box<InformBox>(lang(lng_signin_no_email_forgot)));
+		return;
+	} else if (_recoverRequestId) {
+		return;
+	}
+	_recoverRequestId = request(MTPauth_RequestPasswordRecovery(
+	)).done([=](const MTPauth_PasswordRecovery &result) {
+		Expects(result.type() == mtpc_auth_passwordRecovery);
+
+		_recoverRequestId = 0;
+
+		const auto &data = result.c_auth_passwordRecovery();
+		const auto pattern = qs(data.vemail_pattern);
+		const auto box = _view->show(Box<RecoverBox>(pattern));
+		box->connect(box, &RecoverBox::reloadPassword, [=] {
+			reloadPassword();
+		});
+		box->connect(box, &RecoverBox::recoveryExpired, [=] {
+			if (box) {
+				box->closeBox();
+			}
+		});
+	}).fail([=](const RPCError &error) {
+		_recoverRequestId = 0;
+		_view->show(Box<InformBox>(Lang::Hard::ServerError()
+			+ '\n'
+			+ error.type()));
+	}).send();
+}
+
 void FormController::reloadPassword() {
 	requestPassword();
 }

Telegram/SourceFiles/passport/passport_form_controller.h

@@ -233,6 +233,7 @@ public:
 	QString privacyPolicyUrl() const;
 	std::vector<not_null<const Value*>> submitGetErrors();
 	void submitPassword(const QString &password);
+	void recoverPassword();
 	rpl::producer<QString> passwordError() const;
 	const PasswordSettings &passwordSettings() const;
 	void reloadPassword();
@@ -391,6 +392,7 @@ private:
 	PasswordSettings _password;
 	Form _form;
 	bool _cancelled = false;
+	mtpRequestId _recoverRequestId = 0;
 	std::map<FileKey, std::unique_ptr<mtpFileLoader>> _fileLoaders;
 
 	rpl::event_stream<not_null<const EditFile*>> _scanUpdated;

Telegram/SourceFiles/passport/passport_panel_controller.cpp

@@ -400,6 +400,10 @@ void PanelController::submitPassword(const QString &password) {
 	_form->submitPassword(password);
 }
 
+void PanelController::recoverPassword() {
+	_form->recoverPassword();
+}
+
 rpl::producer<QString> PanelController::passwordError() const {
 	return _form->passwordError();
 }

Telegram/SourceFiles/passport/passport_panel_controller.h

@@ -67,6 +67,7 @@ public:
 	QString privacyPolicyUrl() const;
 	void submitForm();
 	void submitPassword(const QString &password);
+	void recoverPassword();
 	rpl::producer<QString> passwordError() const;
 	QString passwordHint() const;
 	QString unconfirmedEmailPattern() const;

Telegram/SourceFiles/passport/passport_panel_password.cpp

@@ -65,6 +65,10 @@ PanelAskPassword::PanelAskPassword(
 		showError(error);
 	}, lifetime());
 
+	_forgot->addClickHandler([=] {
+		recover();
+	});
+
 	_password->setFocusFast();
 	_userpic->setAttribute(Qt::WA_TransparentForMouseEvents);
 
@@ -92,6 +96,10 @@ void PanelAskPassword::submit() {
 	_controller->submitPassword(_password->getLastText());
 }
 
+void PanelAskPassword::recover() {
+	_controller->recoverPassword();
+}
+
 void PanelAskPassword::resizeEvent(QResizeEvent *e) {
 	updateControlsGeometry();
 }

Telegram/SourceFiles/passport/passport_panel_password.h

@@ -38,6 +38,7 @@ private:
 	void updateControlsGeometry();
 	void showError(const QString &error);
 	void hideError();
+	void recover();
 
 	not_null<PanelController*> _controller;