Handle for_both chat wallpaper change.

Telegram/Resources/langs/lang.strings

@@ -1647,11 +1647,13 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_action_suggested_video_button" = "View Video";
 "lng_action_attach_menu_bot_allowed" = "You allowed this bot to message you when you added it in the attachment menu.";
 "lng_action_webapp_bot_allowed" = "You allowed this bot to message you in his web-app.";
-"lng_action_set_wallpaper_me" = "You set a new wallpaper for this chat";
-"lng_action_set_wallpaper" = "{user} set a new wallpaper for this chat";
+"lng_action_set_wallpaper_me" = "You set a new wallpaper for this chat.";
+"lng_action_set_wallpaper" = "{user} set a new wallpaper for this chat.";
+"lng_action_set_wallpaper_both_me" = "You set a new wallpaper for {user} and you.";
 "lng_action_set_wallpaper_button" = "View Wallpaper";
-"lng_action_set_same_wallpaper_me" = "You set the same wallpaper for this chat";
-"lng_action_set_same_wallpaper" = "{user} set the same wallpaper for this chat";
+"lng_action_set_wallpaper_remove" = "Remove";
+"lng_action_set_same_wallpaper_me" = "You set the same wallpaper for this chat.";
+"lng_action_set_same_wallpaper" = "{user} set the same wallpaper for this chat.";
 "lng_action_topic_created_inside" = "Topic created";
 "lng_action_topic_closed_inside" = "Topic closed";
 "lng_action_topic_reopened_inside" = "Topic reopened";

Telegram/SourceFiles/api/api_updates.cpp

@@ -1991,6 +1991,18 @@ void Updates::feedUpdate(const MTPUpdate &update) {
 		}
 	} break;
 
+	case mtpc_updatePeerWallpaper: {
+		const auto &d = update.c_updatePeerWallpaper();
+		if (const auto peer = session().data().peerLoaded(peerFromMTP(d.vpeer()))) {
+			if (const auto paper = d.vwallpaper()) {
+				peer->setWallPaper(
+					Data::WallPaper::Create(&session(), *paper));
+			} else {
+				peer->setWallPaper({});
+			}
+		}
+	} break;
+
 	case mtpc_updateBotCommands: {
 		const auto &d = update.c_updateBotCommands();
 		if (const auto peer = session().data().peerLoaded(peerFromMTP(d.vpeer()))) {

Telegram/SourceFiles/data/data_media_types.cpp

@@ -437,6 +437,10 @@ const WallPaper *Media::paper() const {
 	return nullptr;
 }
 
+bool Media::paperForBoth() const {
+	return false;
+}
+
 FullStoryId Media::storyId() const {
 	return {};
 }
@@ -1987,21 +1991,28 @@ std::unique_ptr<HistoryView::Media> MediaGiftBox::createView(
 
 MediaWallPaper::MediaWallPaper(
 	not_null<HistoryItem*> parent,
-	const WallPaper &paper)
+	const WallPaper &paper,
+	bool paperForBoth)
 : Media(parent)
-, _paper(paper) {
+, _paper(paper)
+, _paperForBoth(paperForBoth) {
 }
 
 MediaWallPaper::~MediaWallPaper() = default;
 
-std::unique_ptr<Media> MediaWallPaper::clone(not_null<HistoryItem*> parent) {
-	return std::make_unique<MediaWallPaper>(parent, _paper);
+std::unique_ptr<Media> MediaWallPaper::clone(
+		not_null<HistoryItem*> parent) {
+	return std::make_unique<MediaWallPaper>(parent, _paper, _paperForBoth);
 }
 
 const WallPaper *MediaWallPaper::paper() const {
 	return &_paper;
 }
 
+bool MediaWallPaper::paperForBoth() const {
+	return _paperForBoth;
+}
+
 TextWithEntities MediaWallPaper::notificationText() const {
 	return {};
 }

Telegram/SourceFiles/data/data_media_types.h

@@ -131,6 +131,7 @@ public:
 	virtual CloudImage *location() const;
 	virtual PollData *poll() const;
 	virtual const WallPaper *paper() const;
+	virtual bool paperForBoth() const;
 	virtual FullStoryId storyId() const;
 	virtual bool storyExpired(bool revalidate = false);
 	virtual bool storyMention() const;
@@ -568,12 +569,16 @@ private:
 
 class MediaWallPaper final : public Media {
 public:
-	MediaWallPaper(not_null<HistoryItem*> parent, const WallPaper &paper);
+	MediaWallPaper(
+		not_null<HistoryItem*> parent,
+		const WallPaper &paper,
+		bool paperForBoth);
 	~MediaWallPaper();
 
 	std::unique_ptr<Media> clone(not_null<HistoryItem*> parent) override;
 
 	const WallPaper *paper() const override;
+	bool paperForBoth() const override;
 
 	TextWithEntities notificationText() const override;
 	QString pinnedTextSubstring() const override;
@@ -588,6 +593,7 @@ public:
 
 private:
 	const WallPaper _paper;
+	const bool _paperForBoth = false;
 
 };
 

Telegram/SourceFiles/history/history.cpp

@@ -1192,6 +1192,11 @@ void History::applyServiceChanges(
 		}
 	}, [&](const MTPDmessageActionSetChatTheme &data) {
 		peer->setThemeEmoji(qs(data.vemoticon()));
+	}, [&](const MTPDmessageActionSetChatWallPaper &data) {
+		if (item->out() || data.is_for_both()) {
+			peer->setWallPaper(
+				Data::WallPaper::Create(&session(), data.vwallpaper()));
+		}
 	}, [&](const MTPDmessageActionChatJoinedByRequest &data) {
 		processJoinedPeer(item->from());
 	}, [&](const MTPDmessageActionTopicCreate &data) {

Telegram/SourceFiles/history/history_item.cpp

@@ -4501,6 +4501,7 @@ void HistoryItem::setServiceMessageByAction(const MTPmessageAction &action) {
 			const MTPDmessageActionSetChatWallPaper &action) {
 		const auto isSelf = (_from->id == _from->session().userPeerId());
 		const auto same = action.is_same();
+		const auto both = action.is_for_both();
 		const auto peer = isSelf ? history()->peer : _from;
 		const auto user = peer->asUser();
 		const auto name = (user && !user->firstName.isEmpty())
@@ -4511,17 +4512,23 @@ void HistoryItem::setServiceMessageByAction(const MTPmessageAction &action) {
 			result.links.push_back(peer->createOpenLink());
 		}
 		result.text = isSelf
-			? (same
-				? tr::lng_action_set_same_wallpaper_me
-				: tr::lng_action_set_wallpaper_me)(
+			? ((!same && both)
+				? tr::lng_action_set_wallpaper_both_me(
 					tr::now,
+					lt_user,
+					Ui::Text::Link(Ui::Text::Bold(name), 1),
 					Ui::Text::WithEntities)
+				: (same
+					? tr::lng_action_set_same_wallpaper_me
+					: tr::lng_action_set_wallpaper_me)(
+						tr::now,
+						Ui::Text::WithEntities))
 			: (same
 				? tr::lng_action_set_same_wallpaper
 				: tr::lng_action_set_wallpaper)(
 					tr::now,
 					lt_user,
-					Ui::Text::Link(name, 1), // Link 1.
+					Ui::Text::Link(Ui::Text::Bold(name), 1),
 					Ui::Text::WithEntities);
 		return result;
 	};
@@ -4681,7 +4688,10 @@ void HistoryItem::applyAction(const MTPMessageAction &action) {
 			const auto session = &history()->session();
 			const auto &attached = data.vwallpaper();
 			if (const auto paper = WallPaper::Create(session, attached)) {
-				_media = std::make_unique<MediaWallPaper>(this, *paper);
+				_media = std::make_unique<MediaWallPaper>(
+					this,
+					*paper,
+					data.is_for_both());
 			}
 		}
 	}, [&](const MTPDmessageActionGiftCode &data) {

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

@@ -77,10 +77,10 @@ TextWithEntities PremiumGift::subtitle() {
 	return result;
 }
 
-QString PremiumGift::button() {
+rpl::producer<QString> PremiumGift::button() {
 	return _data.slug.isEmpty()
-		? tr::lng_sticker_premium_view(tr::now)
-		: tr::lng_prize_open(tr::now);
+		? tr::lng_sticker_premium_view()
+		: tr::lng_prize_open();
 }
 
 ClickHandlerPtr PremiumGift::createViewLink() {

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

@@ -28,7 +28,7 @@ public:
 	QSize size() override;
 	QString title() override;
 	TextWithEntities subtitle() override;
-	QString button() override;
+	rpl::producer<QString> button() override;
 	int buttonSkip() override;
 	void draw(
 		Painter &p,

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

@@ -26,28 +26,7 @@ ServiceBox::ServiceBox(
 : Media(parent)
 , _parent(parent)
 , _content(std::move(content))
-, _button([&] {
-	auto result = Button();
-	result.link = _content->createViewLink();
-
-	const auto text = _content->button();
-	if (text.isEmpty()) {
-		return result;
-	}
-	result.repaint = [=] { repaint(); };
-	result.text.setText(st::semiboldTextStyle, _content->button());
-
-	const auto height = st::msgServiceGiftBoxButtonHeight;
-	const auto &padding = st::msgServiceGiftBoxButtonPadding;
-	result.size = QSize(
-		result.text.maxWidth()
-			+ height
-			+ padding.left()
-			+ padding.right(),
-		height);
-
-	return result;
-}())
+, _button({ .link = _content->createViewLink() })
 , _maxWidth(st::msgServiceGiftBoxSize.width()
 	- st::msgPadding.left()
 	- st::msgPadding.right())
@@ -79,11 +58,29 @@ ServiceBox::ServiceBox(
 			: (_title.countHeight(_maxWidth)
 				+ st::msgServiceGiftBoxTitlePadding.bottom()))
 		+ _subtitle.countHeight(_maxWidth)
-		+ (_button.empty()
+		+ (!_content->button()
 			? 0
-			: (_content->buttonSkip() + _button.size.height()))
+			: (_content->buttonSkip() + st::msgServiceGiftBoxButtonHeight))
 		+ st::msgServiceGiftBoxButtonMargins.bottom()))
 , _innerSize(_size - QSize(0, st::msgServiceGiftBoxTopSkip)) {
+	if (auto text = _content->button()) {
+		_button.repaint = [=] { repaint(); };
+		std::move(text) | rpl::start_with_next([=](QString value) {
+			_button.text.setText(st::semiboldTextStyle, value);
+			const auto height = st::msgServiceGiftBoxButtonHeight;
+			const auto &padding = st::msgServiceGiftBoxButtonPadding;
+			const auto empty = _button.size.isEmpty();
+			_button.size = QSize(
+				(_button.text.maxWidth()
+					+ height
+					+ padding.left()
+					+ padding.right()),
+				height);
+			if (!empty) {
+				repaint();
+			}
+		}, _lifetime);
+	}
 }
 
 ServiceBox::~ServiceBox() = default;

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

@@ -26,7 +26,7 @@ public:
 	[[nodiscard]] virtual int buttonSkip() {
 		return top();
 	}
-	[[nodiscard]] virtual QString button() = 0;
+	[[nodiscard]] virtual rpl::producer<QString> button() = 0;
 	virtual void draw(
 		Painter &p,
 		const PaintContext &context,
@@ -110,6 +110,7 @@ private:
 	Ui::Text::String _subtitle;
 	const QSize _size;
 	const QSize _innerSize;
+	rpl::lifetime _lifetime;
 
 };
 

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

@@ -76,8 +76,8 @@ int StoryMention::buttonSkip() {
 	return st::storyMentionButtonSkip;
 }
 
-QString StoryMention::button() {
-	return tr::lng_action_story_mention_button(tr::now);
+rpl::producer<QString> StoryMention::button() {
+	return tr::lng_action_story_mention_button();
 }
 
 TextWithEntities StoryMention::subtitle() {

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

@@ -33,7 +33,7 @@ public:
 	QString title() override;
 	TextWithEntities subtitle() override;
 	int buttonSkip() override;
-	QString button() override;
+	rpl::producer<QString> button() override;
 	void draw(
 		Painter &p,
 		const PaintContext &context,

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

@@ -7,12 +7,14 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "history/view/media/history_view_theme_document.h"
 
+#include "apiwrap.h"
 #include "boxes/background_preview_box.h"
 #include "history/history.h"
 #include "history/history_item.h"
 #include "history/view/history_view_element.h"
 #include "history/view/history_view_cursor_state.h"
 #include "history/view/media/history_view_sticker_player_abstract.h"
+#include "data/data_changes.h"
 #include "data/data_document.h"
 #include "data/data_session.h"
 #include "data/data_document_media.h"
@@ -23,7 +25,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "core/click_handler_types.h"
 #include "core/local_url_handlers.h"
 #include "lang/lang_keys.h"
+#include "main/main_session.h"
 #include "ui/text/format_values.h"
+#include "ui/boxes/confirm_box.h"
 #include "ui/chat/chat_style.h"
 #include "ui/chat/chat_theme.h"
 #include "ui/cached_round_corners.h"
@@ -34,6 +38,40 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "styles/style_chat.h"
 
 namespace HistoryView {
+namespace {
+
+[[nodiscard]] bool HasThatWallPaperForBoth(
+		not_null<PeerData*> peer,
+		const Data::WallPaper &paper) {
+	const auto now = peer->wallPaper();
+	return now && now->equals(paper);
+}
+
+[[nodiscard]] bool HasThatWallPaperForBoth(not_null<HistoryItem*> item) {
+	const auto media = item->media();
+	const auto paper = media ? media->paper() : nullptr;
+	return paper
+		&& media->paperForBoth()
+		&& HasThatWallPaperForBoth(item->history()->peer, *paper);
+}
+
+[[nodiscard]] rpl::producer<bool> HasThatWallPaperForBothValue(
+		not_null<HistoryItem*> item) {
+	const auto media = item->media();
+	const auto paper = media ? media->paper() : nullptr;
+	if (!paper || !media->paperForBoth()) {
+		return rpl::single(false);
+	}
+	const auto peer = item->history()->peer;
+	return peer->session().changes().peerFlagsValue(
+		peer,
+		Data::PeerUpdate::Flag::ChatWallPaper
+	) | rpl::map([peer, paper = *paper] {
+		return HasThatWallPaperForBoth(peer, paper);
+	});
+}
+
+} // namespace
 
 ThemeDocument::ThemeDocument(
 	not_null<Element*> parent,
@@ -457,23 +495,49 @@ TextWithEntities ThemeDocumentBox::subtitle() {
 	return _parent->data()->notificationText();
 }
 
-QString ThemeDocumentBox::button() {
+rpl::producer<QString> ThemeDocumentBox::button() {
 	return _parent->data()->out()
-		? QString()
-		: tr::lng_action_set_wallpaper_button(tr::now);
+		? nullptr
+		: rpl::conditional(
+			HasThatWallPaperForBothValue(_parent->data()),
+			tr::lng_action_set_wallpaper_remove(),
+			tr::lng_action_set_wallpaper_button());
 }
 
 ClickHandlerPtr ThemeDocumentBox::createViewLink() {
 	const auto out = _parent->data()->out();
 	const auto to = _parent->history()->peer;
 	const auto media = _parent->data()->media();
+	const auto weak = base::make_weak(_parent);
 	const auto paper = media ? media->paper() : nullptr;
 	const auto maybe = paper ? *paper : std::optional<Data::WallPaper>();
 	const auto itemId = _parent->data()->fullId();
 	return std::make_shared<LambdaClickHandler>([=](ClickContext context) {
 		const auto my = context.other.value<ClickHandlerContext>();
 		if (const auto controller = my.sessionWindow.get()) {
-			if (out) {
+			const auto view = weak.get();
+			if (view
+				&& !view->data()->out()
+				&& HasThatWallPaperForBoth(view->data())) {
+				const auto reset = crl::guard(weak, [=](Fn<void()> close) {
+					const auto api = &controller->session().api();
+					api->request(MTPmessages_SetChatWallPaper(
+						MTP_flags(MTPmessages_SetChatWallPaper::Flag::f_revert),
+						view->data()->history()->peer->input,
+						MTPInputWallPaper(),
+						MTPWallPaperSettings(),
+						MTPint()
+					)).done([=](const MTPUpdates &result) {
+						api->applyUpdates(result);
+					}).send();
+					close();
+				});
+				controller->show(Ui::MakeConfirmBox({
+					.text = tr::lng_background_sure_reset_default(),
+					.confirmed = reset,
+					.confirmText = tr::lng_background_reset_default(),
+				}));
+			} else if (out) {
 				controller->toggleChooseChatTheme(to);
 			} else if (maybe) {
 				controller->show(Box<BackgroundPreviewBox>(

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

@@ -99,7 +99,7 @@ public:
 	QSize size() override;
 	QString title() override;
 	TextWithEntities subtitle() override;
-	QString button() override;
+	rpl::producer<QString> button() override;
 	void draw(
 		Painter &p,
 		const PaintContext &context,

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

@@ -203,12 +203,12 @@ QString UserpicSuggestion::title() {
 	return QString();
 }
 
-QString UserpicSuggestion::button() {
+rpl::producer<QString> UserpicSuggestion::button() {
 	return _photo.getPhoto()->hasVideo()
 		? (_photo.parent()->data()->out()
-			? tr::lng_action_suggested_video_button(tr::now)
-			: tr::lng_profile_set_video_button(tr::now))
-		: tr::lng_action_suggested_photo_button(tr::now);
+			? tr::lng_action_suggested_video_button()
+			: tr::lng_profile_set_video_button())
+		: tr::lng_action_suggested_photo_button();
 }
 
 TextWithEntities UserpicSuggestion::subtitle() {

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

@@ -31,7 +31,7 @@ public:
 	QSize size() override;
 	QString title() override;
 	TextWithEntities subtitle() override;
-	QString button() override;
+	rpl::producer<QString> button() override;
 	void draw(
 		Painter &p,
 		const PaintContext &context,