Added support of link to specific option in poll.

Telegram/Resources/langs/lang.strings

@@ -4988,6 +4988,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_context_reply_to_task" = "Reply to Task";
 "lng_context_reply_to_poll_option" = "Reply to Option";
 "lng_context_copy_poll_option" = "Copy Option";
+"lng_context_copy_poll_option_link" = "Copy Option Link";
 "lng_context_delete_poll_option" = "Delete Item";
 "lng_context_poll_message_tab" = "Poll";
 "lng_context_poll_option_tab" = "Option";

Telegram/SourceFiles/core/local_url_handlers.cpp

@@ -43,6 +43,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_birthday.h"
 #include "data/data_channel.h"
 #include "data/data_document.h"
+#include "data/data_poll.h"
 #include "data/data_session.h"
 #include "data/data_user.h"
 #include "media/player/media_player_instance.h"
@@ -615,6 +616,8 @@ bool ResolveUsernameOrPhone(
 	const auto threadId = topicId ? topicId : threadParam.toInt();
 	const auto gameParam = params.value(u"game"_q);
 	const auto videot = params.value(u"t"_q);
+	const auto pollOption = PollOptionFromLink(
+		params.value(u"option"_q));
 	if (params.contains(u"direct"_q)) {
 		resolveType = ResolveType::ChannelDirect;
 	}
@@ -633,6 +636,7 @@ bool ResolveUsernameOrPhone(
 		.usernameOrId = domain,
 		.phone = phone,
 		.messageId = post,
+		.pollOption = pollOption,
 		.storyParam = storyParam,
 		.storyAlbumId = storyAlbumId,
 		.giftCollectionId = giftCollectionId,
@@ -704,6 +708,8 @@ bool ResolvePrivatePost(
 	const auto topicId = topicParam.toInt();
 	const auto threadParam = params.value(u"thread"_q);
 	const auto threadId = topicId ? topicId : threadParam.toInt();
+	const auto pollOption = PollOptionFromLink(
+		params.value(u"option"_q));
 	if (!channelId || (msgId && !IsServerMsgId(msgId))) {
 		return false;
 	}
@@ -711,6 +717,7 @@ bool ResolvePrivatePost(
 	controller->showPeerByLink(Window::PeerByLinkInfo{
 		.usernameOrId = channelId,
 		.messageId = msgId,
+		.pollOption = pollOption,
 		.repliesInfo = commentId
 			? Window::RepliesByLinkInfo{
 				Window::CommentId{ commentId }

Telegram/SourceFiles/data/data_poll.cpp

@@ -491,6 +491,15 @@ PollMedia PollMediaFromInputMTP(
 	return result;
 }
 
+QByteArray PollOptionFromLink(const QString &value) {
+	return QByteArray::fromBase64(value.toLatin1());
+}
+
+QString PollOptionToLink(const QByteArray &option) {
+	return QString::fromLatin1(
+		option.toBase64(QByteArray::OmitTrailingEquals));
+}
+
 MTPPoll PollDataToMTP(not_null<const PollData*> poll, bool close) {
 	const auto convert = [&](const PollAnswer &answer) {
 		const auto flags = answer.media

Telegram/SourceFiles/data/data_poll.h

@@ -131,6 +131,9 @@ private:
 
 };
 
+[[nodiscard]] QByteArray PollOptionFromLink(const QString &value);
+[[nodiscard]] QString PollOptionToLink(const QByteArray &option);
+
 [[nodiscard]] MTPPoll PollDataToMTP(
 	not_null<const PollData*> poll,
 	bool close = false);

Telegram/SourceFiles/history/view/history_view_context_menu.cpp

@@ -1602,6 +1602,21 @@ void FillPollOptionPage(
 			TextUtilities::SetClipboardText(text);
 		},
 		&st::menuIconCopy);
+	if (item->hasDirectLink()) {
+		const auto link = item->history()->session().api()
+			.exportDirectMessageLink(item, false);
+		const auto separator = (link.indexOf('?') >= 0) ? u'&' : u'?';
+		const auto optionLink = link
+			+ separator
+			+ u"option="_q
+			+ PollOptionToLink(pollOption);
+		menu->addAction(
+			tr::lng_context_copy_poll_option_link(tr::now),
+			[optionLink] {
+				QGuiApplication::clipboard()->setText(optionLink);
+			},
+			&st::menuIconLink);
+	}
 	const auto canDelete = [&] {
 		if (!a->addedDate) {
 			return false;

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -596,6 +596,7 @@ void SessionNavigation::showMessageByLinkResolved(
 	params.origin = SectionShow::OriginMessage{
 		info.clickFromMessageId
 	};
+	params.highlight.pollOption = info.pollOption;
 	const auto peer = item->history()->peer;
 	const auto topicId = peer->isForum() ? item->topicRootId() : 0;
 	if (topicId) {
@@ -615,6 +616,7 @@ void SessionNavigation::showPeerByLinkResolved(
 	params.origin = SectionShow::OriginMessage{
 		info.clickFromMessageId
 	};
+	params.highlight.pollOption = info.pollOption;
 	if (info.voicechatHash && peer->isChannel()) {
 		// First show the channel itself.
 		crl::on_main(this, [=] {

Telegram/SourceFiles/window/window_session_controller_link_info.h

@@ -40,6 +40,7 @@ struct PeerByLinkInfo {
 	QString phone;
 	QString chatLinkSlug;
 	MsgId messageId = ShowAtUnreadMsgId;
+	QByteArray pollOption;
 	QString storyParam;
 	int storyAlbumId = 0;
 	int giftCollectionId = 0;