Implement opening of t.me/bot/app-s.

Telegram/CMakeLists.txt

@@ -444,6 +444,8 @@ PRIVATE
     data/data_audio_msg_id.h
     data/data_auto_download.cpp
     data/data_auto_download.h
+    data/data_bot_app.cpp
+    data/data_bot_app.h
     data/data_chat.cpp
     data/data_chat.h
     data/data_chat_filters.cpp

Telegram/Resources/langs/lang.strings

@@ -396,6 +396,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_username_available" = "This username is available.";
 "lng_username_not_found" = "User @{user} not found.";
 "lng_username_by_phone_not_found" = "User {phone} not found.";
+"lng_username_app_not_found" = "Bot application not found.";
 "lng_username_link" = "This link opens a chat with you:";
 "lng_username_copied" = "Link copied to clipboard.";
 
@@ -1463,6 +1464,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_action_took_screenshot" = "{from} took a screenshot!";
 "lng_action_you_took_screenshot" = "You took a screenshot!";
 "lng_action_bot_allowed_from_domain" = "You allowed this bot to message you when you logged in on {domain}.";
+"lng_action_bot_allowed_from_app" = "You allowed this bot to message you when you opened {app}.";
 "lng_action_secure_values_sent" = "{user} received the following documents: {documents}";
 "lng_action_secure_personal_details" = "personal details";
 "lng_action_secure_proof_of_identity" = "proof of identity";

Telegram/SourceFiles/core/click_handler_types.cpp

@@ -108,7 +108,11 @@ void HiddenUrlClickHandler::Open(QString url, QVariant context) {
 	};
 	if (url.startsWith(u"tg://"_q, Qt::CaseInsensitive)
 		|| url.startsWith(u"internal:"_q, Qt::CaseInsensitive)) {
-		open();
+		UrlClickHandler::Open(url, QVariant::fromValue([&] {
+			auto result = context.value<ClickHandlerContext>();
+			result.mayShowConfirmation = !base::IsCtrlPressed();
+			return result;
+		}()));
 	} else {
 		const auto parsedUrl = QUrl::fromUserInput(url);
 		if (UrlRequiresConfirmation(parsedUrl) && !base::IsCtrlPressed()) {

Telegram/SourceFiles/core/click_handler_types.h

@@ -42,6 +42,7 @@ struct ClickHandlerContext {
 	Fn<HistoryView::ElementDelegate*()> elementDelegate;
 	base::weak_ptr<Window::SessionController> sessionWindow;
 	std::shared_ptr<Ui::Show> show;
+	bool mayShowConfirmation = false;
 	bool skipBotAutoLogin = false;
 	bool botStartAutoSubmit = false;
 	// Is filled from peer info.

Telegram/SourceFiles/core/local_url_handlers.cpp

@@ -373,6 +373,8 @@ bool ResolveUsernameOrPhone(
 	if (const auto postId = postParam.toInt()) {
 		post = postId;
 	}
+	const auto appname = params.value(u"appname"_q);
+	const auto appstart = params.value(u"startapp"_q);
 	const auto commentParam = params.value(u"comment"_q);
 	const auto commentId = commentParam.toInt();
 	const auto topicParam = params.value(u"topic"_q);
@@ -384,6 +386,12 @@ bool ResolveUsernameOrPhone(
 		startToken = gameParam;
 		resolveType = ResolveType::ShareGame;
 	}
+	if (startToken.isEmpty() && params.contains(u"startapp"_q)) {
+		startToken = params.value(u"startapp"_q);
+	}
+	if (!appname.isEmpty()) {
+		resolveType = ResolveType::BotApp;
+	}
 	const auto myContext = context.value<ClickHandlerContext>();
 	using Navigation = Window::SessionNavigation;
 	controller->showPeerByLink(Navigation::PeerByLinkInfo{
@@ -403,6 +411,8 @@ bool ResolveUsernameOrPhone(
 		.startToken = startToken,
 		.startAdminRights = adminRights,
 		.startAutoSubmit = myContext.botStartAutoSubmit,
+		.botAppName = appname.isEmpty() ? postParam : appname,
+		.botAppForceConfirmation = myContext.mayShowConfirmation,
 		.attachBotUsername = params.value(u"attach"_q),
 		.attachBotToggleCommand = (params.contains(u"startattach"_q)
 			? params.value(u"startattach"_q)
@@ -1004,6 +1014,7 @@ QString TryConvertUrlToLocal(QString url) {
 			"("
 				"/?\\?|"
 				"/?$|"
+				"/[a-zA-Z0-9\\.\\_]+|"
 				"/\\d+/?(\\?|$)|"
 				"/\\d+/\\d+/?(\\?|$)"
 			")"_q, query, matchOptions)) {
@@ -1014,6 +1025,8 @@ QString TryConvertUrlToLocal(QString url) {
 				added = u"&topic=%1&post=%2"_q.arg(threadPostMatch->captured(1)).arg(threadPostMatch->captured(2));
 			} else if (const auto postMatch = regex_match(u"^/(\\d+)(/?\\?|/?$)"_q, usernameMatch->captured(2))) {
 				added = u"&post="_q + postMatch->captured(1);
+			} else if (const auto appNameMatch = regex_match(u"^/([a-zA-Z0-9\\.\\_]+)(/?\\?|/?$)"_q, usernameMatch->captured(2))) {
+				added = u"&appname="_q + appNameMatch->captured(1);
 			}
 			return base + added + (params.isEmpty() ? QString() : '&' + params);
 		}

Telegram/SourceFiles/data/data_bot_app.cpp

@@ -0,0 +1,13 @@
+/*
+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 "data/data_bot_app.h"
+
+BotAppData::BotAppData(not_null<Data::Session*> owner, const BotAppId &id)
+: owner(owner)
+, id(id) {
+}

Telegram/SourceFiles/data/data_bot_app.h

@@ -0,0 +1,27 @@
+/*
+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 "data/data_photo.h"
+#include "data/data_document.h"
+
+struct BotAppData {
+	BotAppData(not_null<Data::Session*> owner, const BotAppId &id);
+
+	const not_null<Data::Session*> owner;
+	BotAppId id = 0;
+	PeerId botId = 0;
+	QString shortName;
+	QString title;
+	QString description;
+	PhotoData *photo = nullptr;
+	DocumentData *document = nullptr;
+
+	uint64 accessHash = 0;
+	uint64 hash = 0;
+};

Telegram/SourceFiles/data/data_game.h

@@ -21,5 +21,4 @@ struct GameData {
 	QString description;
 	PhotoData *photo = nullptr;
 	DocumentData *document = nullptr;
-
 };

Telegram/SourceFiles/data/data_session.cpp

@@ -41,6 +41,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "lang/lang_keys.h" // tr::lng_deleted(tr::now) in user name
 #include "data/stickers/data_stickers.h"
 #include "data/notify/data_notify_settings.h"
+#include "data/data_bot_app.h"
 #include "data/data_changes.h"
 #include "data/data_group_call.h"
 #include "data/data_media_types.h"
@@ -3450,6 +3451,45 @@ void Session::gameApplyFields(
 	notifyGameUpdateDelayed(game);
 }
 
+not_null<BotAppData*> Session::botApp(BotAppId id) {
+	const auto i = _botApps.find(id);
+	return (i != end(_botApps))
+		? i->second.get()
+		: _botApps.emplace(
+			id,
+			std::make_unique<BotAppData>(this, id)).first->second.get();
+}
+
+BotAppData *Session::findBotApp(PeerId botId, const QString &appName) const {
+	for (const auto &[id, app] : _botApps) {
+		if (app->botId == botId && app->shortName == appName) {
+			return app.get();
+		}
+	}
+	return nullptr;
+}
+
+BotAppData *Session::processBotApp(
+		PeerId botId,
+		const MTPBotApp &data) {
+	return data.match([&](const MTPDbotApp &data) {
+		const auto result = botApp(data.vid().v);
+		result->botId = botId;
+		result->shortName = qs(data.vshort_name());
+		result->title = qs(data.vtitle());
+		result->description = qs(data.vdescription());
+		result->photo = processPhoto(data.vphoto());
+		result->document = data.vdocument()
+			? processDocument(*data.vdocument()).get()
+			: nullptr;
+		result->accessHash = data.vaccess_hash().v;
+		result->hash = data.vhash().v;
+		return result.get();
+	}, [](const MTPDbotAppNotModified &) {
+		return (BotAppData*)nullptr;
+	});
+}
+
 not_null<PollData*> Session::poll(PollId id) {
 	auto i = _polls.find(id);
 	if (i == _polls.cend()) {

Telegram/SourceFiles/data/data_session.h

@@ -570,6 +570,12 @@ public:
 		not_null<GameData*> original,
 		const MTPGame &data);
 
+	[[nodiscard]] not_null<BotAppData*> botApp(BotAppId id);
+	BotAppData *findBotApp(PeerId botId, const QString &appName) const;
+	BotAppData *processBotApp(
+		PeerId botId,
+		const MTPBotApp &data);
+
 	[[nodiscard]] not_null<PollData*> poll(PollId id);
 	not_null<PollData*> processPoll(const MTPPoll &data);
 	not_null<PollData*> processPoll(const MTPDmessageMediaPoll &data);
@@ -922,6 +928,9 @@ private:
 	std::unordered_map<
 		GameId,
 		std::unique_ptr<GameData>> _games;
+	std::unordered_map<
+		BotAppId,
+		std::unique_ptr<BotAppData>> _botApps;
 	std::unordered_map<
 		not_null<const GameData*>,
 		base::flat_set<not_null<ViewElement*>>> _gameViews;

Telegram/SourceFiles/data/data_types.h

@@ -118,6 +118,7 @@ class DocumentData;
 class PhotoData;
 struct WebPageData;
 struct GameData;
+struct BotAppData;
 struct PollData;
 
 using PhotoId = uint64;
@@ -129,6 +130,7 @@ using GameId = uint64;
 using PollId = uint64;
 using WallPaperId = uint64;
 using CallId = uint64;
+using BotAppId = uint64;
 constexpr auto CancelledWebPageId = WebPageId(0xFFFFFFFFFFFFFFFFULL);
 
 struct PreparedPhotoThumb {

Telegram/SourceFiles/export/data/export_data_types.cpp

@@ -1059,6 +1059,12 @@ ServiceAction ParseServiceAction(
 		result.content = content;
 	}, [&](const MTPDmessageActionBotAllowed &data) {
 		auto content = ActionBotAllowed();
+		if (const auto app = data.vapp()) {
+			app->match([&](const MTPDbotApp &data) {
+				content.appId = data.vid().v;
+				content.app = ParseString(data.vtitle());
+			}, [](const MTPDbotAppNotModified &) {});
+		}
 		if (const auto domain = data.vdomain()) {
 			content.domain = ParseString(*domain);
 		}

Telegram/SourceFiles/export/data/export_data_types.h

@@ -431,6 +431,8 @@ struct ActionCustomAction {
 };
 
 struct ActionBotAllowed {
+	uint64 appId = 0;
+	Utf8String app;
 	Utf8String domain;
 	bool attachMenu = false;
 };

Telegram/SourceFiles/export/output/export_output_html.cpp

@@ -1033,6 +1033,9 @@ auto HtmlWriter::Wrap::pushMessage(
 		return data.attachMenu
 			? "You allowed this bot to message you "
 			"when you added it in the attachment menu."_q
+			: data.app.isEmpty()
+			? ("You allowed this bot to message you when you opened "
+				+ SerializeString(data.app))
 			: ("You allowed this bot to message you when you logged in on "
 				+ SerializeString(data.domain));
 	}, [&](const ActionSecureValuesSent &data) {

Telegram/SourceFiles/export/output/export_output_json.cpp

@@ -477,6 +477,10 @@ QByteArray SerializeMessage(
 	}, [&](const ActionBotAllowed &data) {
 		if (data.attachMenu) {
 			pushAction("attach_menu_bot_allowed");
+		} else if (data.appId) {
+			pushAction("allow_sending_messages");
+			push("reason_app_id", data.appId);
+			push("reason_app_name", data.app);
 		} else {
 			pushAction("allow_sending_messages");
 			push("reason_domain", data.domain);

Telegram/SourceFiles/history/history_item.cpp

@@ -49,6 +49,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "api/api_updates.h"
 #include "dialogs/ui/dialogs_message_view.h"
 #include "data/notify/data_notify_settings.h"
+#include "data/data_bot_app.h"
 #include "data/data_scheduled_messages.h" // kScheduledUntilOnlineTimestamp
 #include "data/data_changes.h"
 #include "data/data_session.h"
@@ -3689,6 +3690,21 @@ void HistoryItem::setServiceMessageByAction(const MTPmessageAction &action) {
 			result.text = {
 				tr::lng_action_attach_menu_bot_allowed(tr::now)
 			};
+		} else if (const auto app = action.vapp()) {
+			const auto bot = history()->peer->asUser();
+			const auto botId = bot ? bot->id : PeerId();
+			const auto info = history()->owner().processBotApp(botId, *app);
+			const auto url = (bot && info)
+				? history()->session().createInternalLinkFull(
+					bot->username() + '/' + info->shortName)
+				: QString();
+			result.text = tr::lng_action_bot_allowed_from_app(
+				tr::now,
+				lt_app,
+				(url.isEmpty()
+					? TextWithEntities{ u"App"_q }
+					: Ui::Text::Link(info->title, url)),
+				Ui::Text::WithEntities);
 		} else {
 			const auto domain = qs(action.vdomain().value_or_empty());
 			result.text = tr::lng_action_bot_allowed_from_domain(

Telegram/SourceFiles/inline_bots/bot_attach_web_view.cpp

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "inline_bots/bot_attach_web_view.h"
 
 #include "api/api_common.h"
+#include "data/data_bot_app.h"
 #include "data/data_user.h"
 #include "data/data_file_origin.h"
 #include "data/data_document.h"
@@ -424,6 +425,7 @@ struct AttachWebView::Context {
 	Dialogs::EntryState dialogsEntryState;
 	Api::SendAction action;
 	bool fromSwitch = false;
+	bool fromBotApp = false;
 };
 
 AttachWebView::AttachWebView(not_null<Main::Session*> session)
@@ -551,13 +553,12 @@ void AttachWebView::request(const WebViewButton &button) {
 			: MTP_inputPeerEmpty())
 	)).done([=](const MTPWebViewResult &result) {
 		_requestId = 0;
-		result.match([&](const MTPDwebViewResultUrl &data) {
-			show(
-				data.vquery_id().v,
-				qs(data.vurl()),
-				button.text,
-				button.fromMenu || button.url.isEmpty());
-		});
+		const auto &data = result.data();
+		show(
+			data.vquery_id().v,
+			qs(data.vurl()),
+			button.text,
+			button.fromMenu || button.url.isEmpty());
 	}).fail([=](const MTP::Error &error) {
 		_requestId = 0;
 		if (error.type() == u"BOT_INVALID"_q) {
@@ -573,7 +574,9 @@ void AttachWebView::cancel() {
 	_panel = nullptr;
 	_context = nullptr;
 	_bot = nullptr;
+	_app = nullptr;
 	_botUsername = QString();
+	_botAppName = QString();
 	_startCommand = QString();
 }
 
@@ -624,9 +627,7 @@ void AttachWebView::requestAddToMenu(
 	Expects(controller != nullptr || _context != nullptr);
 
 	if (!bot->isBot() || !bot->botInfo->supportsAttachMenu) {
-		Ui::ShowMultilineToast({
-			.text = { tr::lng_bot_menu_not_supported(tr::now) },
-		});
+		showToast(tr::lng_bot_menu_not_supported(tr::now), controller);
 		return;
 	}
 	const auto wasController = (controller != nullptr);
@@ -694,10 +695,8 @@ void AttachWebView::requestAddToMenu(
 					} else {
 						requestBots();
 						if (!open(types)) {
-							Ui::ShowMultilineToast({
-								.text = {
-									tr::lng_bot_menu_already_added(tr::now) },
-							});
+							showToast(
+								tr::lng_bot_menu_already_added(tr::now));
 						}
 					}
 				}
@@ -708,17 +707,13 @@ void AttachWebView::requestAddToMenu(
 		_addToMenuBot = nullptr;
 		_addToMenuContext = nullptr;
 		_addToMenuStartCommand = QString();
-		Ui::ShowMultilineToast({
-			.text = { tr::lng_bot_menu_not_supported(tr::now) },
-		});
+		showToast(tr::lng_bot_menu_not_supported(tr::now));
 	}).send();
 }
 
 void AttachWebView::removeFromMenu(not_null<UserData*> bot) {
 	toggleInMenu(bot, ToggledState::Removed, [=] {
-		Ui::ShowMultilineToast({
-			.text = { tr::lng_bot_remove_from_menu_done(tr::now) },
-		});
+		showToast(tr::lng_bot_remove_from_menu_done(tr::now));
 	});
 }
 
@@ -729,9 +724,7 @@ void AttachWebView::resolve() {
 		}
 		_bot = bot->asUser();
 		if (!_bot) {
-			Ui::ShowMultilineToast({
-				.text = { tr::lng_bot_menu_not_supported(tr::now) }
-			});
+			showToast(tr::lng_bot_menu_not_supported(tr::now));
 			return;
 		}
 		requestAddToMenu(_bot, _startCommand);
@@ -760,11 +753,8 @@ void AttachWebView::resolveUsername(
 	}).fail([=](const MTP::Error &error) {
 		_requestId = 0;
 		if (error.code() == 400) {
-			Ui::ShowMultilineToast({
-				.text = {
-					tr::lng_username_not_found(tr::now, lt_user, username),
-				},
-			});
+			showToast(
+				tr::lng_username_not_found(tr::now, lt_user, username));
 		}
 	}).send();
 }
@@ -838,9 +828,8 @@ void AttachWebView::requestMenu(
 				: MTP_inputPeerEmpty())
 		)).done([=](const MTPWebViewResult &result) {
 			_requestId = 0;
-			result.match([&](const MTPDwebViewResultUrl &data) {
-				show(data.vquery_id().v, qs(data.vurl()), text);
-			});
+			const auto &data = result.data();
+			show(data.vquery_id().v, qs(data.vurl()), text);
 		}).fail([=](const MTP::Error &error) {
 			_requestId = 0;
 			if (error.type() == u"BOT_INVALID"_q) {
@@ -850,6 +839,129 @@ void AttachWebView::requestMenu(
 	});
 }
 
+void AttachWebView::requestApp(
+		not_null<Window::SessionController*> controller,
+		const Api::SendAction &action,
+		not_null<UserData*> bot,
+		const QString &appName,
+		const QString &startParam,
+		bool forceConfirmation) {
+	const auto context = LookupContext(controller, action);
+	if (_requestId
+		&& _bot == bot
+		&& _startCommand == startParam
+		&& _botAppName == appName
+		&& IsSame(_context, context)) {
+		return;
+	}
+	cancel();
+	_bot = bot;
+	_startCommand = startParam;
+	_botAppName = appName;
+	_context = std::make_unique<Context>(context);
+	_context->fromBotApp = true;
+	const auto already = _session->data().findBotApp(_bot->id, appName);
+	_requestId = _session->api().request(MTPmessages_GetBotApp(
+		MTP_inputBotAppShortName(
+			bot->inputUser,
+			MTP_string(appName)),
+		MTP_long(already ? already->hash : 0)
+	)).done([=](const MTPmessages_BotApp &result) {
+		_requestId = 0;
+		if (!_bot || !_context) {
+			return;
+		}
+		const auto &data = result.data();
+		const auto firstTime = data.is_inactive();
+		const auto received = _session->data().processBotApp(
+			_bot->id,
+			data.vapp());
+		_app = received ? received : already;
+		if (!_app) {
+			cancel();
+			showToast(tr::lng_username_app_not_found(tr::now));
+			return;
+		}
+		const auto confirm = firstTime || forceConfirmation;
+		if (confirm) {
+			confirmAppOpen(result.data().is_request_write_access());
+		} else {
+			requestAppView(false);
+		}
+	}).fail([=] {
+		cancel();
+		showToast(tr::lng_username_app_not_found(tr::now));
+	}).send();
+}
+
+void AttachWebView::confirmAppOpen(bool requestWriteAccess) {
+	const auto controller = _context ? _context->controller.get() : nullptr;
+	if (!controller || !_bot) {
+		return;
+	}
+	controller->show(Box([=](not_null<Ui::GenericBox*> box) {
+		const auto allowed = std::make_shared<Ui::Checkbox*>();
+		const auto done = [=](Fn<void()> close) {
+			requestAppView((*allowed) && (*allowed)->checked());
+			close();
+		};
+		Ui::ConfirmBox(box, {
+			tr::lng_allow_bot_webview(
+				tr::now,
+				lt_bot_name,
+				Ui::Text::Bold(_bot->name()),
+				Ui::Text::RichLangValue),
+			done,
+		});
+		if (requestWriteAccess) {
+			(*allowed) = box->addRow(
+				object_ptr<Ui::Checkbox>(
+					box,
+					tr::lng_url_auth_allow_messages(
+						tr::now,
+						lt_bot,
+						Ui::Text::Bold(_bot->name()),
+						Ui::Text::WithEntities),
+					true,
+					st::urlAuthCheckbox),
+				style::margins(
+					st::boxRowPadding.left(),
+					st::boxPhotoCaptionSkip,
+					st::boxRowPadding.right(),
+					st::boxPhotoCaptionSkip));
+			(*allowed)->setAllowTextLines();
+		}
+	}));
+}
+
+void AttachWebView::requestAppView(bool allowWrite) {
+	if (!_context || !_app) {
+		return;
+	}
+	using Flag = MTPmessages_RequestAppWebView::Flag;
+	const auto flags = Flag::f_theme_params
+		| (_startCommand.isEmpty() ? Flag(0) : Flag::f_start_param)
+		| (allowWrite ? Flag::f_write_allowed : Flag(0));
+	_requestId = _session->api().request(MTPmessages_RequestAppWebView(
+		MTP_flags(flags),
+		_context->action.history->peer->input,
+		MTP_inputBotAppID(MTP_long(_app->id), MTP_long(_app->accessHash)),
+		MTP_string(_startCommand),
+		MTP_dataJSON(MTP_bytes(Window::Theme::WebViewParams().json)),
+		MTP_string("tdesktop")
+	)).done([=](const MTPAppWebViewResult &result) {
+		_requestId = 0;
+		const auto &data = result.data();
+		const auto queryId = uint64();
+		show(queryId, qs(data.vurl()));
+	}).fail([=](const MTP::Error &error) {
+		_requestId = 0;
+		if (error.type() == u"BOT_INVALID"_q) {
+			requestBots();
+		}
+	}).send();
+}
+
 void AttachWebView::confirmOpen(
 		not_null<Window::SessionController*> controller,
 		Fn<void()> done) {
@@ -895,6 +1007,7 @@ void AttachWebView::show(
 	const auto sendData = crl::guard(this, [=](QByteArray data) {
 		if (!_context
 			|| _context->fromSwitch
+			|| _context->fromBotApp
 			|| _context->action.history->peer != _bot
 			|| queryId) {
 			return;
@@ -1061,7 +1174,7 @@ void AttachWebView::show(
 void AttachWebView::started(uint64 queryId) {
 	Expects(_bot != nullptr && _context != nullptr);
 
-	if (_context->fromSwitch) {
+	if (_context->fromSwitch || !queryId) {
 		return;
 	}
 
@@ -1098,6 +1211,24 @@ void AttachWebView::started(uint64 queryId) {
 	}, _panel->lifetime());
 }
 
+void AttachWebView::showToast(
+		const QString &text,
+		Window::SessionController *controller) {
+	const auto strong = controller
+		? controller
+		: _context
+		? _context->controller.get()
+		: _addToMenuContext
+		? _addToMenuContext->controller.get()
+		: nullptr;
+	Ui::ShowMultilineToast({
+		.parentOverride = (strong
+			? Window::Show(strong).toastParent().get()
+			: nullptr),
+		.text = { text },
+	});
+}
+
 void AttachWebView::confirmAddToMenu(
 		AttachWebViewBot bot,
 		Fn<void()> callback) {
@@ -1115,9 +1246,7 @@ void AttachWebView::confirmAddToMenu(
 				if (callback) {
 					callback();
 				}
-				Ui::ShowMultilineToast({
-					.text = { tr::lng_bot_add_to_menu_done(tr::now) },
-				});
+				showToast(tr::lng_bot_add_to_menu_done(tr::now));
 			});
 			close();
 		};

Telegram/SourceFiles/inline_bots/bot_attach_web_view.h

@@ -93,6 +93,13 @@ public:
 	void requestMenu(
 		not_null<Window::SessionController*> controller,
 		not_null<UserData*> bot);
+	void requestApp(
+		not_null<Window::SessionController*> controller,
+		const Api::SendAction &action,
+		not_null<UserData*> bot,
+		const QString &appName,
+		const QString &startParam,
+		bool forceConfirmation);
 
 	void cancel();
 
@@ -162,14 +169,22 @@ private:
 	void confirmAddToMenu(
 		AttachWebViewBot bot,
 		Fn<void()> callback = nullptr);
+	void confirmAppOpen(bool requestWriteAccess);
+	void requestAppView(bool allowWrite);
 	void started(uint64 queryId);
 
+	void showToast(
+		const QString &text,
+		Window::SessionController *controller = nullptr);
+
 	const not_null<Main::Session*> _session;
 
 	std::unique_ptr<Context> _context;
 	UserData *_bot = nullptr;
 	QString _botUsername;
+	QString _botAppName;
 	QString _startCommand;
+	BotAppData *_app = nullptr;
 	QPointer<Ui::GenericBox> _confirmAddBox;
 
 	mtpRequestId _requestId = 0;

Telegram/SourceFiles/inline_bots/inline_results_inner.cpp

@@ -447,7 +447,7 @@ void Inner::refreshMosaicOffset() {
 	const auto top = _switchPmButton
 		? (_switchPmButton->height() + st::inlineResultsSkip)
 		: 0;
-	_mosaic.setPadding(st::gifsPadding + QMargins(0, top, 0, 0));
+	_mosaic.setPadding(st::emojiPanMargins + QMargins(0, top, 0, 0));
 }
 
 void Inner::refreshSwitchPmButton(const CacheEntry *entry) {

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -357,6 +357,15 @@ void SessionNavigation::showPeerByLinkResolved(
 	using Scope = AddBotToGroupBoxController::Scope;
 	const auto user = peer->asUser();
 	const auto bot = (user && user->isBot()) ? user : nullptr;
+
+	// t.me/username/012345 - we thought it was a channel post link, but
+	// after resolving the username we found out it is a bot.
+	const auto resolveType = (bot
+		&& !info.botAppName.isEmpty()
+		&& info.resolveType == ResolveType::Default)
+		? ResolveType::BotApp
+		: info.resolveType;
+
 	const auto &replies = info.repliesInfo;
 	if (const auto threadId = std::get_if<ThreadId>(&replies)) {
 		showRepliesForMessage(
@@ -389,14 +398,29 @@ void SessionNavigation::showPeerByLinkResolved(
 				info.messageId,
 				callback);
 		}
-	} else if (bot && info.resolveType == ResolveType::ShareGame) {
+	} else if (bot && resolveType == ResolveType::BotApp) {
+		const auto itemId = info.clickFromMessageId;
+		const auto item = _session->data().message(itemId);
+		const auto contextPeer = item
+			? item->history()->peer
+			: bot;
+		crl::on_main(this, [=] {
+			bot->session().attachWebView().requestApp(
+				parentController(),
+				Api::SendAction(bot->owner().history(contextPeer)),
+				bot,
+				info.botAppName,
+				info.startToken,
+				info.botAppForceConfirmation);
+		});
+	} else if (bot && resolveType == ResolveType::ShareGame) {
 		Window::ShowShareGameBox(parentController(), bot, info.startToken);
 	} else if (bot
-		&& (info.resolveType == ResolveType::AddToGroup
-			|| info.resolveType == ResolveType::AddToChannel)) {
-		const auto scope = (info.resolveType == ResolveType::AddToGroup)
+		&& (resolveType == ResolveType::AddToGroup
+			|| resolveType == ResolveType::AddToChannel)) {
+		const auto scope = (resolveType == ResolveType::AddToGroup)
 			? (info.startAdminRights ? Scope::GroupAdmin : Scope::All)
-			: (info.resolveType == ResolveType::AddToChannel)
+			: (resolveType == ResolveType::AddToChannel)
 			? Scope::ChannelAdmin
 			: Scope::None;
 		Assert(scope != Scope::None);
@@ -407,7 +431,7 @@ void SessionNavigation::showPeerByLinkResolved(
 			scope,
 			info.startToken,
 			info.startAdminRights);
-	} else if (info.resolveType == ResolveType::Mention) {
+	} else if (resolveType == ResolveType::Mention) {
 		if (bot || peer->isChannel()) {
 			crl::on_main(this, [=] {
 				showPeerHistory(peer, params);

Telegram/SourceFiles/window/window_session_controller.h

@@ -97,6 +97,7 @@ inline constexpr bool is_flag_type(GifPauseReason) { return true; };
 
 enum class ResolveType {
 	Default,
+	BotApp,
 	BotStart,
 	AddToGroup,
 	AddToChannel,
@@ -208,6 +209,8 @@ public:
 		QString startToken;
 		ChatAdminRights startAdminRights;
 		bool startAutoSubmit = false;
+		QString botAppName;
+		bool botAppForceConfirmation = false;
 		QString attachBotUsername;
 		std::optional<QString> attachBotToggleCommand;
 		InlineBots::PeerTypes attachBotChooseTypes;