Context-aware phrases in topic service messages.

Telegram/Resources/langs/lang.strings

@@ -1508,12 +1508,16 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_action_webview_data_done" = "You have just successfully transferred data from the «{text}» button to the bot.";
 "lng_action_gift_received" = "{user} sent you a gift for {cost}";
 "lng_action_gift_received_me" = "You sent to {user} a gift for {cost}";
-"lng_action_topic_created" = "Topic created";
-"lng_action_topic_renamed" = "Topic renamed to «{title}»";
-"lng_action_topic_icon_changed" = "Topic icon changed to {emoji}";
-"lng_action_topic_icon_removed" = "Topic icon removed";
-"lng_action_topic_closed" = "Topic closed";
-"lng_action_topic_reopened" = "Topic reopened";
+"lng_action_topic_created_inside" = "Topic created";
+"lng_action_topic_closed_inside" = "Topics closed";
+"lng_action_topic_reopened_inside" = "Topic reopened";
+"lng_action_topic_created" = "{topic} — was created";
+"lng_action_topic_closed" = "{topic} — was closed";
+"lng_action_topic_reopened" = "{topic} — was reopened";
+"lng_action_topic_placeholder" = "topic";
+"lng_action_topic_renamed" = "{from} renamed the {link} to «{title}»";
+"lng_action_topic_icon_changed" = "{from} changed the {link} icon to {emoji}";
+"lng_action_topic_icon_removed" = "{from} removed the {link} icon";
 
 "lng_premium_gift_duration_months#one" = "for {count} month";
 "lng_premium_gift_duration_months#other" = "for {count} months";
@@ -2019,6 +2023,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_replies_header#one" = "{count} reply";
 "lng_replies_header#other" = "{count} replies";
 "lng_replies_header_none" = "Replies";
+"lng_replies_view_topic" = "View in Topic";
 "lng_comments_header#one" = "{count} comment";
 "lng_comments_header#other" = "{count} comments";
 "lng_comments_header_none" = "Comments";
@@ -3530,7 +3535,14 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_forum_topic_closed" = "This topic is now closed.";
 "lng_forum_topic_delete" = "Delete";
 "lng_forum_topic_delete_sure" = "Are you sure you want to delete this topic?";
+"lng_forum_topic_created_title_my" = "Almost done!";
+"lng_forum_topic_created_body_my" = "Send the first message to start this topic.";
+"lng_forum_topic_created_title" = "Topic started!";
+"lng_forum_topic_created_body" = "Send a message to open the discussion";
 "lng_forum_topics_switch" = "Topics";
+"lng_forum_topics_not_enough#one" = "Only groups with more than **{count} member** can have topics enabled.";
+"lng_forum_topics_not_enough#other" = "Only groups with more than **{count} members** can have topics enabled.";
+"lng_forum_topics_no_discussion" = "Topics can't be enabled in discussion groups at the moment.";
 "lng_forum_no_topics" = "No topics currently created in this forum.";
 "lng_forum_create_topic" = "Create topic";
 "lng_forum_discard_sure" = "Are you sure you want to discard this topic?";

Telegram/SourceFiles/history/admin_log/history_admin_log_item.cpp

@@ -639,16 +639,11 @@ TextWithEntities GenerateDefaultBannedRightsChangeText(
 			? wrapIcon(data.vicon_emoji_id()->v)
 			: TextWithEntities();
 		result.append(qs(data.vtitle()));
-		result.entities.insert(
-			result.entities.begin(),
-			EntityInText(
-				EntityType::CustomUrl,
-				0,
-				result.text.size(),
-				u"https://t.me/c/%1?topic=%2"_q.arg(
-					peerToChannel(channel->id).bare).arg(
-						data.vid().v)));
-		return result;
+		return Ui::Text::Link(
+			std::move(result),
+			u"internal:url:https://t.me/c/%1?topic=%2"_q.arg(
+				peerToChannel(channel->id).bare).arg(
+					data.vid().v));
 	}, [](const MTPDforumTopicDeleted &) {
 		return TextWithEntities{ u"Deleted"_q };
 	});

Telegram/SourceFiles/history/history_inner_widget.cpp

@@ -2109,7 +2109,7 @@ void HistoryInner::showContextMenu(QContextMenuEvent *e, bool showFromTouch) {
 				? item->id
 				: item->replyToTop();
 			const auto phrase = topicRootId
-				? u"View in Thread"_q // #TODO lang-forum
+				? tr::lng_replies_view_topic(tr::now)
 				: (repliesCount > 0)
 				? tr::lng_replies_view(
 					tr::now,

Telegram/SourceFiles/history/history_service.cpp

@@ -638,7 +638,7 @@ void HistoryService::setMessageByAction(const MTPmessageAction &action) {
 
 	auto prepareTopicCreate = [&](const MTPDmessageActionTopicCreate &action) {
 		auto result = PreparedText{};
-		result.text = { tr::lng_action_topic_created(tr::now) };
+		result.text = { tr::lng_action_topic_created_inside(tr::now) };
 		return result;
 	};
 
@@ -657,23 +657,34 @@ void HistoryService::setMessageByAction(const MTPmessageAction &action) {
 		};
 		if (const auto closed = action.vclosed()) {
 			result.text = { mtpIsTrue(*closed)
-				? tr::lng_action_topic_closed(tr::now)
-				: tr::lng_action_topic_reopened(tr::now) };
+				? tr::lng_action_topic_closed_inside(tr::now)
+				: tr::lng_action_topic_reopened_inside(tr::now) };
 		} else if (!action.vtitle()) {
 			if (const auto icon = action.vicon_emoji_id()) {
 				if (const auto iconId = icon->v) {
+					result.links.push_back(fromLink());
 					result.text = tr::lng_action_topic_icon_changed(
 						tr::now,
+						lt_from,
+						fromLinkText(), // Link 1.
+						lt_link,
+						{ tr::lng_action_topic_placeholder(tr::now) },
 						lt_emoji,
 						wrapIcon(iconId),
 						Ui::Text::WithEntities);
 				} else {
-					result.text = {
-						tr::lng_action_topic_icon_removed(tr::now)
-					};
+					result.links.push_back(fromLink());
+					result.text = tr::lng_action_topic_icon_removed(
+						tr::now,
+						lt_from,
+						fromLinkText(), // Link 1.
+						lt_link,
+						{ tr::lng_action_topic_placeholder(tr::now) },
+						Ui::Text::WithEntities);
 				}
 			}
 		} else {
+			result.links.push_back(fromLink());
 			auto title = TextWithEntities{
 				qs(*action.vtitle())
 			};
@@ -682,6 +693,10 @@ void HistoryService::setMessageByAction(const MTPmessageAction &action) {
 			}
 			result.text = tr::lng_action_topic_renamed(
 				tr::now,
+				lt_from,
+				fromLinkText(), // Link 1.
+				lt_link,
+				{ tr::lng_action_topic_placeholder(tr::now) },
 				lt_title,
 				std::move(title),
 				Ui::Text::WithEntities);
@@ -996,7 +1011,7 @@ HistoryService::PreparedText HistoryService::preparePinnedText() {
 				original = Ui::Text::Mid(original, 0, cutAt).append(
 					Ui::kQEllipsis);
 			}
-			original = Ui::Text::Wrapped(
+			original = Ui::Text::Link(
 				Ui::Text::Filtered(
 					std::move(original),
 					{
@@ -1005,8 +1020,7 @@ HistoryService::PreparedText HistoryService::preparePinnedText() {
 						EntityType::Italic,
 						EntityType::CustomEmoji,
 					}),
-				EntityType::CustomUrl,
-				Ui::Text::Link({}, 2).entities.front().data());
+				2);
 			result.text = tr::lng_action_pinned_message(
 				tr::now,
 				lt_from,
@@ -1478,23 +1492,44 @@ void HistoryService::createFromMtp(const MTPDmessage &message) {
 }
 
 void HistoryService::createFromMtp(const MTPDmessageService &message) {
-	const auto type = message.vaction().type();
+	const auto &action = message.vaction();
+	const auto type = action.type();
 	if (type == mtpc_messageActionPinMessage) {
 		UpdateComponents(HistoryServicePinned::Bit());
 	} else if (type == mtpc_messageActionTopicCreate
 		|| type == mtpc_messageActionTopicEdit) {
 		UpdateComponents(HistoryServiceTopicInfo::Bit());
-		Get<HistoryServiceTopicInfo>()->topicPost = true;
+		const auto info = Get<HistoryServiceTopicInfo>();
+		info->topicPost = true;
+		if (type == mtpc_messageActionTopicEdit) {
+			const auto &data = action.c_messageActionTopicEdit();
+			if (const auto title = data.vtitle()) {
+				info->title = qs(*title);
+				info->renamed = true;
+			}
+			if (const auto icon = data.vicon_emoji_id()) {
+				info->iconId = icon->v;
+				info->reiconed = true;
+			}
+			if (const auto closed = data.vclosed()) {
+				info->closed = mtpIsTrue(*closed);
+				info->reopened = !info->closed;
+			}
+		} else {
+			const auto &data = action.c_messageActionTopicCreate();
+			info->title = qs(data.vtitle());
+			info->iconId = data.vicon_emoji_id().value_or_empty();
+		}
 	} else if (type == mtpc_messageActionSetChatTheme) {
 		setupChatThemeChange();
 	} else if (type == mtpc_messageActionSetMessagesTTL) {
 		setupTTLChange();
 	} else if (type == mtpc_messageActionGameScore) {
-		const auto &data = message.vaction().c_messageActionGameScore();
+		const auto &data = action.c_messageActionGameScore();
 		UpdateComponents(HistoryServiceGameScore::Bit());
 		Get<HistoryServiceGameScore>()->score = data.vscore().v;
 	} else if (type == mtpc_messageActionPaymentSent) {
-		const auto &data = message.vaction().c_messageActionPaymentSent();
+		const auto &data = action.c_messageActionPaymentSent();
 		UpdateComponents(HistoryServicePayment::Bit());
 		const auto amount = data.vtotal_amount().v;
 		const auto currency = qs(data.vcurrency());
@@ -1521,10 +1556,10 @@ void HistoryService::createFromMtp(const MTPDmessageService &message) {
 		|| type == mtpc_messageActionGroupCallScheduled) {
 		const auto started = (type == mtpc_messageActionGroupCall);
 		const auto &callData = started
-			? message.vaction().c_messageActionGroupCall().vcall()
-			: message.vaction().c_messageActionGroupCallScheduled().vcall();
+			? action.c_messageActionGroupCall().vcall()
+			: action.c_messageActionGroupCallScheduled().vcall();
 		const auto duration = started
-			? message.vaction().c_messageActionGroupCall().vduration()
+			? action.c_messageActionGroupCall().vduration()
 			: tl::conditional<MTPint>();
 		if (duration) {
 			RemoveComponents(HistoryServiceOngoingCall::Bit());
@@ -1535,7 +1570,7 @@ void HistoryService::createFromMtp(const MTPDmessageService &message) {
 			call->link = GroupCallClickHandler(history()->peer, call->id);
 		}
 	} else if (type == mtpc_messageActionInviteToGroupCall) {
-		const auto &data = message.vaction().c_messageActionInviteToGroupCall();
+		const auto &data = action.c_messageActionInviteToGroupCall();
 		const auto id = CallIdFromInput(data.vcall());
 		const auto peer = history()->peer;
 		const auto has = PeerHasThisCall(peer, id);
@@ -1586,7 +1621,7 @@ void HistoryService::createFromMtp(const MTPDmessageService &message) {
 			}
 		});
 	}
-	setMessageByAction(message.vaction());
+	setMessageByAction(action);
 }
 
 const std::vector<ClickHandlerPtr> &HistoryService::customTextLinks() const {

Telegram/SourceFiles/history/history_service.h

@@ -30,6 +30,12 @@ struct HistoryServicePinned
 struct HistoryServiceTopicInfo
 : public RuntimeComponent<HistoryServiceTopicInfo, HistoryItem>
 , public HistoryServiceDependentData {
+	QString title;
+	DocumentId iconId = 0;
+	bool closed = false;
+	bool reopened = false;
+	bool reiconed = false;
+	bool renamed = false;
 };
 
 struct HistoryServiceGameScore

Telegram/SourceFiles/history/view/history_view_context_menu.cpp

@@ -633,7 +633,7 @@ bool AddViewRepliesAction(
 		: item->replyToTop();
 	const auto highlightId = topicRootId ? item->id : 0;
 	const auto phrase = topicRootId
-		? u"View in Thread"_q // #TODO lang-forum
+		? tr::lng_replies_view_topic(tr::now)
 		: (repliesCount > 0)
 		? tr::lng_replies_view(
 			tr::now,

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -22,6 +22,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/view/history_view_cursor_state.h"
 #include "history/view/history_view_spoiler_click_handler.h"
 #include "history/history.h"
+#include "history/history_service.h"
 #include "base/unixtime.h"
 #include "core/application.h"
 #include "core/core_settings.h"
@@ -37,10 +38,13 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/toast/toast.h"
 #include "ui/toasts/common_toasts.h"
 #include "ui/text/text_options.h"
+#include "ui/text/text_utilities.h"
 #include "ui/item_text_options.h"
 #include "ui/painter.h"
 #include "data/data_session.h"
 #include "data/data_groups.h"
+#include "data/data_forum.h"
+#include "data/data_forum_topic.h"
 #include "data/data_media_types.h"
 #include "data/data_sponsored_messages.h"
 #include "data/data_message_reactions.h"
@@ -657,6 +661,141 @@ int Element::textHeightFor(int textWidth) {
 	return _textHeight;
 }
 
+auto Element::contextDependentServiceText() -> TextWithLinks {
+	if (_delegate->elementContext() == Context::Replies) {
+		return {};
+	}
+	const auto item = data();
+	const auto info = item->Get<HistoryServiceTopicInfo>();
+	if (!info) {
+		return {};
+	}
+	const auto peerId = item->history()->peer->id;
+	const auto topicRootId = item->topicRootId();
+	if (!topicRootId || !peerIsChannel(peerId)) {
+		return {};
+	}
+	const auto from = item->from();
+	const auto wrapIcon = [](DocumentId id) {
+		return TextWithEntities{
+			"@",
+			{ EntityInText(
+				EntityType::CustomEmoji,
+				0,
+				1,
+				Data::SerializeCustomEmojiId({ .id = id }))
+			},
+		};
+	};
+	const auto topicUrl =  u"internal:url:https://t.me/c/%1?topic=%2"_q
+		.arg(peerToChannel(peerId).bare)
+		.arg(topicRootId.bare);
+	const auto fromLink = [&](int index) {
+		return Ui::Text::Link(from->name(), index);
+	};
+	const auto placeholderLink = [&] {
+		return Ui::Text::Link(
+			tr::lng_action_topic_placeholder(tr::now),
+			topicUrl);
+	};
+	const auto wrapTopic = [&](
+			const QString &title,
+			std::optional<DocumentId> iconId) {
+		auto result = TextWithEntities{ title };
+		auto full = iconId
+			? wrapIcon(*iconId).append(' ').append(std::move(result))
+			: result;
+		return Ui::Text::Link(std::move(full), topicUrl);
+	};
+	const auto wrapParentTopic = [&] {
+		const auto forum = history()->peer->forum();
+		if (!forum || forum->topicDeleted(topicRootId)) {
+			return wrapTopic(
+				tr::lng_deleted_message(tr::now),
+				std::nullopt);
+		} else if (const auto topic = forum->topicFor(topicRootId)) {
+			return wrapTopic(topic->title(), topic->iconId());
+		} else {
+			forum->requestTopic(topicRootId, crl::guard(this, [=] {
+				itemTextUpdated();
+				history()->owner().requestViewResize(this);
+			}));
+			return wrapTopic(
+				tr::lng_profile_loading(tr::now),
+				std::nullopt);
+		}
+	};
+
+	if (info->closed) {
+		return {
+			tr::lng_action_topic_closed(
+				tr::now,
+				lt_topic,
+				wrapParentTopic(),
+				Ui::Text::WithEntities),
+		};
+	} else if (info->reopened) {
+		return {
+			tr::lng_action_topic_reopened(
+				tr::now,
+				lt_topic,
+				wrapParentTopic(),
+				Ui::Text::WithEntities),
+		};
+	} else if (info->renamed) {
+		return {
+			tr::lng_action_topic_renamed(
+				tr::now,
+				lt_from,
+				fromLink(1),
+				lt_link,
+				placeholderLink(),
+				lt_title,
+				wrapTopic(
+					info->title,
+					(info->reiconed
+						? info->iconId
+						: std::optional<DocumentId>())),
+				Ui::Text::WithEntities),
+			{ from->createOpenLink() },
+		};
+	} else if (info->reiconed) {
+		if (const auto iconId = info->iconId) {
+			return {
+				tr::lng_action_topic_icon_changed(
+					tr::now,
+					lt_from,
+					fromLink(1),
+					lt_link,
+					placeholderLink(),
+					lt_emoji,
+					wrapIcon(iconId),
+					Ui::Text::WithEntities),
+				{ from->createOpenLink() },
+			};
+		} else {
+			return {
+				tr::lng_action_topic_icon_removed(
+					tr::now,
+					lt_from,
+					fromLink(1),
+					lt_link,
+					placeholderLink(),
+					Ui::Text::WithEntities),
+				{ from->createOpenLink() },
+			};
+		}
+	} else {
+		return {
+			tr::lng_action_topic_created(
+				tr::now,
+				lt_topic,
+				wrapTopic(info->title, info->iconId),
+				Ui::Text::WithEntities),
+		};
+	}
+}
+
 void Element::validateText() {
 	const auto item = data();
 	const auto &text = item->_text;
@@ -668,13 +807,20 @@ void Element::validateText() {
 		.customEmojiRepaint = [=] { customEmojiRepaint(); },
 	};
 	if (_flags & Flag::ServiceMessage) {
+		const auto contextDependentText = contextDependentServiceText();
+		const auto &markedText = contextDependentText.text.empty()
+			? text
+			: contextDependentText.text;
+		const auto &customLinks = contextDependentText.text.empty()
+			? item->customTextLinks()
+			: contextDependentText.links;
 		_text.setMarkedText(
 			st::serviceTextStyle,
-			text,
+			markedText,
 			Ui::ItemTextServiceOptions(),
 			context);
 		auto linkIndex = 0;
-		for (const auto &link : item->customTextLinks()) {
+		for (const auto &link : customLinks) {
 			// Link indices start with 1.
 			_text.setLink(++linkIndex, link);
 		}

Telegram/SourceFiles/history/view/history_view_element.h

@@ -515,6 +515,12 @@ private:
 
 	void refreshMedia(Element *replacing);
 
+	struct TextWithLinks {
+		TextWithEntities text;
+		std::vector<ClickHandlerPtr> links;
+	};
+	[[nodiscard]] TextWithLinks contextDependentServiceText();
+
 	const not_null<ElementDelegate*> _delegate;
 	const not_null<HistoryItem*> _data;
 	HistoryBlock *_block = nullptr;

Telegram/lib_ui

@@ -1 +1 @@
-Subproject commit c199a1722fae72e254753f3095444a3c82a2a704
+Subproject commit 7f1dd3c351f534d0564c41376176eb0cd1be4184