Fix owner badges in groups.

Telegram/SourceFiles/apiwrap.cpp

@@ -1623,7 +1623,7 @@ void ApiWrap::requestAdmins(not_null<ChannelData*> channel) {
 	)).done([this, channel](const MTPchannels_ChannelParticipants &result) {
 		_adminsRequests.remove(channel);
 		result.match([&](const MTPDchannels_channelParticipants &data) {
-			Data::ApplyChannelAdmins(channel, data);
+			Data::ApplyMegagroupAdmins(channel, data);
 		}, [&](const MTPDchannels_channelParticipantsNotModified &) {
 			LOG(("API Error: channels.channelParticipantsNotModified received!"));
 		});
@@ -3515,7 +3515,12 @@ void ApiWrap::refreshChannelAdmins(
 		p.match([&](const MTPDchannelParticipantAdmin &data) {
 			changes.add(userId, qs(data.vrank().value_or_empty()));
 		}, [&](const MTPDchannelParticipantCreator &data) {
-			changes.add(userId, qs(data.vrank().value_or_empty()));
+			const auto rank = qs(data.vrank().value_or_empty());
+			if (const auto info = channel->mgInfo.get()) {
+				info->creator = channel->owner().userLoaded(userId);
+				info->creatorRank = rank;
+			}
+			changes.add(userId, rank);
 		}, [&](const auto &data) {
 			changes.remove(userId);
 		});

Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp

@@ -412,11 +412,21 @@ not_null<Ui::InputField*> EditAdminBox::addRankInput() {
 			st::rightsHeaderLabel),
 		st::rightsHeaderMargin);
 
+	const auto isOwner = [&] {
+		if (user()->isSelf() && amCreator()) {
+			return true;
+		} else if (const auto chat = peer()->asChat()) {
+			return chat->creator == peerToUser(user()->id);
+		} else if (const auto channel = peer()->asChannel()) {
+			return channel->mgInfo && channel->mgInfo->creator == user();
+		}
+		Unexpected("Peer type in EditAdminBox::addRankInput.");
+	}();
 	const auto result = addControl(
 		object_ptr<Ui::InputField>(
 			this,
 			st::customBadgeField,
-			(amCreator() ? tr::lng_owner_badge : tr::lng_admin_badge)(),
+			(isOwner ? tr::lng_owner_badge : tr::lng_admin_badge)(),
 			_oldRank),
 		st::rightsAboutMargin);
 	result->setMaxLength(kAdminRoleLimit);
@@ -431,7 +441,7 @@ not_null<Ui::InputField*> EditAdminBox::addRankInput() {
 			this,
 			tr::lng_rights_edit_admin_rank_about(
 				lt_title,
-				(amCreator() ? tr::lng_owner_badge : tr::lng_admin_badge)()),
+				(isOwner ? tr::lng_owner_badge : tr::lng_admin_badge)()),
 			st::boxDividerLabel),
 		st::rightsAboutMargin);
 

Telegram/SourceFiles/data/data_channel.cpp

@@ -514,9 +514,6 @@ void ChannelData::setAdminRights(const MTPChatAdminRights &rights) {
 		} else {
 			mgInfo->lastAdmins.remove(self);
 		}
-
-		auto amAdmin = hasAdminRights() || amCreator();
-		Data::ChannelAdminChanges(this).add(session().userId(), QString());
 	}
 	Notify::peerUpdatedDelayed(this, UpdateFlag::RightsChanged | UpdateFlag::AdminsChanged | UpdateFlag::BannedUsersChanged);
 }
@@ -741,12 +738,27 @@ void ApplyChannelUpdate(
 		update.vnotify_settings());
 }
 
-void ApplyChannelAdmins(
+void ApplyMegagroupAdmins(
 		not_null<ChannelData*> channel,
 		const MTPDchannels_channelParticipants &data) {
+	Expects(channel->isMegagroup());
+
 	channel->owner().processUsers(data.vusers());
 
 	const auto &list = data.vparticipants().v;
+	const auto i = ranges::find(
+		list,
+		mtpc_channelParticipantCreator,
+		&MTPChannelParticipant::type);
+	if (i != list.end()) {
+		const auto &data = i->c_channelParticipantCreator();
+		const auto userId = data.vuser_id().v;
+		channel->mgInfo->creator = channel->owner().userLoaded(userId);
+		channel->mgInfo->creatorRank = qs(data.vrank().value_or_empty());
+	} else {
+		channel->mgInfo->creator = nullptr;
+		channel->mgInfo->creatorRank = QString();
+	}
 
 	auto adding = base::flat_map<UserId, QString>();
 	auto admins = ranges::make_iterator_range(

Telegram/SourceFiles/data/data_channel.h

@@ -456,7 +456,7 @@ void ApplyChannelUpdate(
 	not_null<ChannelData*> channel,
 	const MTPDchannelFull &update);
 
-void ApplyChannelAdmins(
+void ApplyMegagroupAdmins(
 	not_null<ChannelData*> channel,
 	const MTPDchannels_channelParticipants &data);