Show description about custom chat intro.

Telegram/Resources/langs/lang.strings

@@ -1760,6 +1760,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_action_giveaway_results_none" = "No winners of the giveaway could be selected.";
 "lng_action_boost_apply#one" = "{from} boosted the group";
 "lng_action_boost_apply#other" = "{from} boosted the group {count} times";
+"lng_action_set_chat_intro" = "{from} added the message below for all empty chats. How?";
 
 "lng_similar_channels_title" = "Similar channels";
 "lng_similar_channels_view_all" = "View all";

Telegram/SourceFiles/history/history_item.cpp

@@ -1549,6 +1549,11 @@ void HistoryItem::setRealShortcutId(BusinessShortcutId id) {
 	_shortcutId = id;
 }
 
+void HistoryItem::setCustomServiceLink(ClickHandlerPtr link) {
+	AddComponents(HistoryServiceCustomLink::Bit());
+	Get<HistoryServiceCustomLink>()->link = std::move(link);
+}
+
 void HistoryItem::destroy() {
 	_history->destroyMessage(this);
 }
@@ -4849,6 +4854,7 @@ void HistoryItem::setServiceMessageByAction(const MTPmessageAction &action) {
 		prepareGiveawayLaunch,
 		prepareGiveawayResults,
 		prepareBoostApply,
+		PrepareEmptyText<MTPDmessageActionRequestedPeerSentMe>,
 		PrepareErrorText<MTPDmessageActionEmpty>));
 
 	// Additional information.

Telegram/SourceFiles/history/history_item.h

@@ -197,6 +197,7 @@ public:
 	[[nodiscard]] BusinessShortcutId shortcutId() const;
 	[[nodiscard]] bool isBusinessShortcut() const;
 	void setRealShortcutId(BusinessShortcutId id);
+	void setCustomServiceLink(ClickHandlerPtr link);
 
 	void addLogEntryOriginal(
 		WebPageId localId,

Telegram/SourceFiles/history/history_item_components.h

@@ -629,6 +629,11 @@ struct HistoryServiceGiveawayResults
 , public HistoryServiceDependentData {
 };
 
+struct HistoryServiceCustomLink
+: public RuntimeComponent<HistoryServiceCustomLink, HistoryItem> {
+	ClickHandlerPtr link;
+};
+
 enum class HistorySelfDestructType {
 	Photo,
 	Video,

Telegram/SourceFiles/history/view/history_view_about_view.cpp

@@ -11,6 +11,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "api/api_sending.h"
 #include "apiwrap.h"
 #include "base/random.h"
+#include "boxes/premium_preview_box.h"
 #include "chat_helpers/stickers_lottie.h"
 #include "core/click_handler_types.h"
 #include "data/business/data_business_common.h"
@@ -28,6 +29,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_item_reply_markup.h"
 #include "lang/lang_keys.h"
 #include "main/main_session.h"
+#include "settings/business/settings_chat_intro.h"
 #include "settings/settings_premium.h"
 #include "ui/chat/chat_style.h"
 #include "ui/text/text_utilities.h"
@@ -237,7 +239,7 @@ bool AboutView::refresh() {
 	const auto user = _history->peer->asUser();
 	const auto info = user ? user->botInfo.get() : nullptr;
 	if (!info) {
-		if (user && _history->isDisplayedEmpty()) {
+		if (user && !user->isSelf() && _history->isDisplayedEmpty()) {
 			if (_item) {
 				return false;
 			} else if (user->meRequiresPremiumToWrite()
@@ -269,13 +271,16 @@ void AboutView::makeIntro(not_null<UserData*> user) {
 }
 
 void AboutView::make(Data::ChatIntro data) {
+	const auto text = data
+		? tr::lng_action_set_chat_intro(tr::now, lt_from, _history->peer->name())
+		: QString();
 	const auto item = _history->makeMessage({
 		.id = _history->nextNonHistoryEntryId(),
 		.flags = (MessageFlag::FakeAboutView
 			| MessageFlag::FakeHistoryItem
 			| MessageFlag::Local),
 		.from = _history->peer->id,
-	}, PreparedServiceText{ { } });
+	}, PreparedServiceText{ { text }});
 
 	if (data.sticker) {
 		_helloChosen = nullptr;
@@ -287,13 +292,26 @@ void AboutView::make(Data::ChatIntro data) {
 	const auto helloChosen = [=](not_null<DocumentData*> sticker) {
 		setHelloChosen(sticker);
 	};
+	const auto handler = [=](ClickContext context) {
+		const auto my = context.other.value<ClickHandlerContext>();
+		if (const auto controller = my.sessionWindow.get()) {
+			if (controller->session().premium()) {
+				controller->showSettings(Settings::ChatIntroId());
+			} else {
+				ShowPremiumPreviewBox(
+					controller->uiShow(),
+					PremiumFeature::ChatIntro);
+			}
+		}
+	};
 	owned->overrideMedia(std::make_unique<HistoryView::MediaGeneric>(
 		owned.get(),
 		GenerateChatIntro(owned.get(), _item.get(), data, helloChosen),
 		HistoryView::MediaGenericDescriptor{
 			.maxWidth = st::chatIntroWidth,
+			.serviceLink = std::make_shared<LambdaClickHandler>(handler),
 			.service = true,
-			.hideServiceText = true,
+			.hideServiceText = text.isEmpty(),
 		}));
 	if (!data.sticker && _helloChosen) {
 		data.sticker = _helloChosen;

Telegram/SourceFiles/history/view/history_view_service_message.cpp

@@ -677,6 +677,8 @@ TextState Service::textState(QPoint point, StateRequest request) const {
 				result.link = same->lnk;
 			} else if (const auto results = item->Get<HistoryServiceGiveawayResults>()) {
 				result.link = results->lnk;
+			} else if (const auto custom = item->Get<HistoryServiceCustomLink>()) {
+				result.link = custom->link;
 			} else if (media && data()->showSimilarChannels()) {
 				result = media->textState(mediaPoint, request);
 			}

Telegram/SourceFiles/history/view/media/history_view_media_generic.cpp

@@ -80,6 +80,10 @@ MediaGeneric::MediaGeneric(
 			.object = std::move(part),
 		});
 	});
+	if (descriptor.serviceLink) {
+		parent->data()->setCustomServiceLink(
+			std::move(descriptor.serviceLink));
+	}
 }
 
 MediaGeneric::~MediaGeneric() {

Telegram/SourceFiles/history/view/media/history_view_media_generic.h

@@ -45,6 +45,7 @@ public:
 
 struct MediaGenericDescriptor {
 	int maxWidth = 0;
+	ClickHandlerPtr serviceLink;
 	bool service = false;
 	bool hideServiceText = false;
 };

Telegram/SourceFiles/settings/settings_business.cpp

@@ -684,7 +684,7 @@ std::vector<PremiumFeature> BusinessFeaturesOrder(
 			return PremiumFeature::BusinessLocation;
 		} else if (s == u"business_bots"_q) {
 			return PremiumFeature::BusinessBots;
-		} else if (s == u"chat_intro"_q) {
+		} else if (s == u"business_intro"_q) {
 			return PremiumFeature::ChatIntro;
 		}
 		return PremiumFeature::kCount;