Added support of non-self users to UsernamesBox.

Telegram/SourceFiles/boxes/username_box.cpp

@@ -10,6 +10,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/peers/edit_peer_usernames_list.h"
 #include "base/timer.h"
 #include "boxes/peers/edit_peer_common.h"
+#include "data/data_channel.h"
 #include "data/data_session.h"
 #include "data/data_user.h"
 #include "lang/lang_keys.h"
@@ -45,7 +46,7 @@ namespace {
 
 class UsernameEditor final : public Ui::RpWidget {
 public:
-	UsernameEditor(not_null<Ui::RpWidget*>, not_null<Main::Session*> session);
+	UsernameEditor(not_null<Ui::RpWidget*>, not_null<PeerData*> peer);
 
 	void setInnerFocus();
 	[[nodiscard]] rpl::producer<> submitted() const;
@@ -66,8 +67,11 @@ private:
 
 	void checkInfoChange();
 
+	[[nodiscard]] QString editableUsername() const;
+
 	QString getName() const;
 
+	const not_null<PeerData*> _peer;
 	const not_null<Main::Session*> _session;
 	const style::margins &_padding;
 	MTP::Sender _api;
@@ -87,18 +91,19 @@ private:
 
 UsernameEditor::UsernameEditor(
 	not_null<Ui::RpWidget*>,
-	not_null<Main::Session*> session)
-: _session(session)
+	not_null<PeerData*> peer)
+: _peer(peer)
+, _session(&peer->session())
 , _padding(st::usernamePadding)
 , _api(&_session->mtp())
 , _username(
 	this,
 	st::defaultInputField,
 	rpl::single(u"@username"_q),
-	session->user()->editableUsername(),
+	editableUsername(),
 	QString())
 , _checkTimer([=] { check(); }) {
-	_goodText = _session->user()->editableUsername().isEmpty()
+	_goodText = editableUsername().isEmpty()
 		? QString()
 		: tr::lng_username_available(tr::now);
 
@@ -148,6 +153,16 @@ rpl::producer<> UsernameEditor::save() {
 	return _saved.events();
 }
 
+QString UsernameEditor::editableUsername() const {
+	if (const auto user = _peer->asUser()) {
+		return user->editableUsername();
+	} else if (const auto channel = _peer->asChannel()) {
+		return channel->editableUsername();
+	} else {
+		return QString();
+	}
+}
+
 rpl::producer<UsernameCheckInfo> UsernameEditor::checkInfoChanged() const {
 	return _checkInfoChanged.events();
 }
@@ -166,7 +181,7 @@ void UsernameEditor::check() {
 		_checkRequestId = 0;
 
 		_errorText = (mtpIsTrue(result)
-				|| _checkUsername == _session->user()->editableUsername())
+				|| (_checkUsername == editableUsername()))
 			? QString()
 			: tr::lng_username_occupied(tr::now);
 		_goodText = _errorText.isEmpty()
@@ -251,14 +266,15 @@ void UsernameEditor::checkInfoPurchaseAvailable() {
 }
 
 void UsernameEditor::updateFail(const QString &error) {
-	const auto self = _session->user();
 	if ((error == u"USERNAME_NOT_MODIFIED"_q)
-		|| (_sentUsername == self->editableUsername())) {
-		self->setName(
-			TextUtilities::SingleLine(self->firstName),
-			TextUtilities::SingleLine(self->lastName),
-			TextUtilities::SingleLine(self->nameOrPhone),
-			TextUtilities::SingleLine(_sentUsername));
+		|| (_sentUsername == editableUsername())) {
+		if (const auto user = _peer->asUser()) {
+			user->setName(
+				TextUtilities::SingleLine(user->firstName),
+				TextUtilities::SingleLine(user->lastName),
+				TextUtilities::SingleLine(user->nameOrPhone),
+				TextUtilities::SingleLine(_sentUsername));
+		}
 		_saved.fire_done();
 	} else if (error == u"USERNAME_INVALID"_q) {
 		_username->setFocus();
@@ -283,7 +299,7 @@ void UsernameEditor::checkFail(const QString &error) {
 		_errorText = tr::lng_username_invalid(tr::now);
 		checkInfoChange();
 	} else if ((error == u"USERNAME_OCCUPIED"_q)
-		&& (_checkUsername != _session->user()->editableUsername())) {
+		&& (_checkUsername != editableUsername())) {
 		_errorText = tr::lng_username_occupied(tr::now);
 		checkInfoChange();
 	} else if (error == u"USERNAME_PURCHASE_AVAILABLE"_q) {
@@ -302,20 +318,25 @@ QString UsernameEditor::getName() const {
 
 void UsernamesBox(
 		not_null<Ui::GenericBox*> box,
-		not_null<Main::Session*> session) {
-	box->setTitle(tr::lng_username_title());
+		not_null<PeerData*> peer) {
+	const auto isBot = peer && peer->isUser() && peer->asUser()->isBot();
+	box->setTitle(isBot
+		? tr::lng_bot_username_title()
+		: tr::lng_username_title());
 
 	const auto container = box->verticalLayout();
 
 	const auto editor = box->addRow(
-		object_ptr<UsernameEditor>(box, session),
+		object_ptr<UsernameEditor>(box, peer),
 		{});
 	box->setFocusCallback([=] { editor->setInnerFocus(); });
 
 	AddUsernameCheckLabel(container, editor->checkInfoChanged());
 
 	auto description = rpl::combine(
-		tr::lng_username_description1(Ui::Text::RichLangValue),
+		(isBot
+			? tr::lng_bot_username_description1
+			: tr::lng_username_description1)(Ui::Text::RichLangValue),
 		tr::lng_username_description2(Ui::Text::RichLangValue)
 	) | rpl::map([](TextWithEntities d1, TextWithEntities d2) {
 		return d1.append("\n\n").append(std::move(d2));
@@ -331,7 +352,7 @@ void UsernamesBox(
 	const auto list = box->addRow(
 		object_ptr<UsernamesList>(
 			box,
-			session->user(),
+			peer,
 			std::make_shared<Ui::BoxShow>(box),
 			[=] {
 				box->scrollToY(0);

Telegram/SourceFiles/boxes/username_box.h

@@ -12,13 +12,11 @@ class GenericBox;
 class VerticalLayout;
 } // namespace Ui
 
-namespace Main {
-class Session;
-} // namespace Main
+class PeerData;
 
 void UsernamesBox(
 	not_null<Ui::GenericBox*> box,
-	not_null<Main::Session*> session);
+	not_null<PeerData*> peer);
 
 struct UsernameCheckInfo final {
 	enum class Type {

Telegram/SourceFiles/settings/settings_information.cpp

@@ -419,7 +419,8 @@ void SetupRows(
 		std::move(value),
 		tr::lng_context_copy_mention(tr::now),
 		[=] {
-			const auto box = controller->show(Box(UsernamesBox, session));
+			const auto box = controller->show(
+				Box(UsernamesBox, session->user()));
 			box->boxClosing(
 			) | rpl::start_with_next([=] {
 				session->api().usernames().requestToCache(session->user());

Telegram/SourceFiles/settings/settings_main.cpp

@@ -209,7 +209,7 @@ void Cover::initViewers() {
 	_username->overrideLinkClickHandler([=] {
 		const auto username = _user->userName();
 		if (username.isEmpty()) {
-			_controller->show(Box(UsernamesBox, &_user->session()));
+			_controller->show(Box(UsernamesBox, _user));
 		} else {
 			QGuiApplication::clipboard()->setText(
 				_user->session().createInternalLinkFull(username));