Added channel list controller to giveaway box for channel selecting.

Telegram/Resources/langs/lang.strings

@@ -2114,6 +2114,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_giveaway_maximum_countries_error#other" = "You can select maximum {count} countries.";
 "lng_giveaway_maximum_channels_error#one" = "You can select maximum {count} channel.";
 "lng_giveaway_maximum_channels_error#other" = "You can select maximum {count} channels.";
+"lng_giveaway_channels_confirm_title" = "Channel is Private";
+"lng_giveaway_channels_confirm_about" = "Are you sure you want to add a private channel? Users won't be able to join it without an invite link.";
 
 "lng_prize_title" = "Congratulations!";
 "lng_prize_about" = "You won a prize in a giveaway organized by {channel}.";

Telegram/SourceFiles/info/boosts/giveaway/giveaway_list_controllers.cpp

@@ -7,8 +7,13 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "info/boosts/giveaway/giveaway_list_controllers.h"
 
+#include "apiwrap.h"
+#include "data/data_channel.h"
 #include "data/data_peer.h"
+#include "data/data_session.h"
 #include "data/data_user.h"
+#include "main/main_session.h"
+#include "ui/boxes/confirm_box.h"
 #include "lang/lang_keys.h"
 
 namespace Giveaway {
@@ -38,4 +43,111 @@ base::unique_qptr<Ui::PopupMenu> AwardMembersListController::rowContextMenu(
 	return nullptr;
 }
 
+MyChannelsListController::MyChannelsListController(
+	not_null<PeerData*> peer,
+	std::shared_ptr<Ui::Show> show,
+	std::vector<not_null<PeerData*>> selected)
+: PeerListController(
+	std::make_unique<PeerListGlobalSearchController>(&peer->session()))
+, _peer(peer)
+, _show(show)
+, _selected(std::move(selected)) {
+}
+
+std::unique_ptr<PeerListRow> MyChannelsListController::createSearchRow(
+		not_null<PeerData*> peer) {
+	if (const auto channel = peer->asChannel()) {
+		return createRow(channel);
+	}
+	return nullptr;
+}
+
+std::unique_ptr<PeerListRow> MyChannelsListController::createRestoredRow(
+		not_null<PeerData*> peer) {
+	if (const auto channel = peer->asChannel()) {
+		return createRow(channel);
+	}
+	return nullptr;
+}
+
+void MyChannelsListController::rowClicked(not_null<PeerListRow*> row) {
+	const auto channel = row->peer()->asChannel();
+	const auto checked = !row->checked();
+	if (checked && channel && channel->username().isEmpty()) {
+		_show->showBox(Box(Ui::ConfirmBox, Ui::ConfirmBoxArgs{
+			.text = tr::lng_giveaway_channels_confirm_about(),
+			.confirmed = [=](Fn<void()> close) {
+				delegate()->peerListSetRowChecked(row, checked);
+				close();
+			},
+			.confirmText = tr::lng_filters_recommended_add(),
+			.title = tr::lng_giveaway_channels_confirm_title(),
+		}));
+	} else {
+		delegate()->peerListSetRowChecked(row, checked);
+	}
+}
+
+Main::Session &MyChannelsListController::session() const {
+	return _peer->session();
+}
+
+void MyChannelsListController::prepare() {
+	delegate()->peerListSetSearchMode(PeerListSearchMode::Enabled);
+	const auto api = _apiLifetime.make_state<MTP::Sender>(
+		&session().api().instance());
+	api->request(
+		MTPstories_GetChatsToSend()
+	).done([=](const MTPmessages_Chats &result) {
+		_apiLifetime.destroy();
+		const auto &chats = result.match([](const auto &data) {
+			return data.vchats().v;
+		});
+		auto &owner = session().data();
+		for (const auto &chat : chats) {
+			if (const auto peer = owner.processChat(chat)) {
+				if (!peer->isChannel() || (peer == _peer)) {
+					continue;
+				}
+				if (!delegate()->peerListFindRow(peer->id.value)) {
+					if (const auto channel = peer->asChannel()) {
+						auto row = createRow(channel);
+						const auto raw = row.get();
+						delegate()->peerListAppendRow(std::move(row));
+						if (ranges::contains(_selected, peer)) {
+							delegate()->peerListSetRowChecked(raw, true);
+							_selected.erase(
+								ranges::remove(_selected, peer),
+								end(_selected));
+						}
+					}
+				}
+			}
+		}
+		for (const auto &selected : _selected) {
+			if (const auto channel = selected->asChannel()) {
+				auto row = createRow(channel);
+				const auto raw = row.get();
+				delegate()->peerListAppendRow(std::move(row));
+				delegate()->peerListSetRowChecked(raw, true);
+			}
+		}
+		delegate()->peerListRefreshRows();
+		_selected.clear();
+	}).send();
+}
+
+std::unique_ptr<PeerListRow> MyChannelsListController::createRow(
+		not_null<ChannelData*> channel) const {
+	if (channel->isMegagroup()) {
+		return nullptr;
+	}
+	auto row = std::make_unique<PeerListRow>(channel);
+	row->setCustomStatus(tr::lng_chat_status_subscribers(
+		tr::now,
+		lt_count,
+		channel->membersCount()));
+	return row;
+}
+
 } // namespace Giveaway

Telegram/SourceFiles/info/boosts/giveaway/giveaway_list_controllers.h

@@ -14,6 +14,7 @@ class PeerListRow;
 
 namespace Ui {
 class PopupMenu;
+class Show;
 } // namespace Ui
 
 namespace Window {
@@ -37,4 +38,33 @@ public:
 
 };
 
+class MyChannelsListController : public PeerListController {
+public:
+	MyChannelsListController(
+		not_null<PeerData*> peer,
+		std::shared_ptr<Ui::Show> show,
+		std::vector<not_null<PeerData*>> selected);
+
+	Main::Session &session() const override;
+	void prepare() override;
+	void rowClicked(not_null<PeerListRow*> row) override;
+
+	std::unique_ptr<PeerListRow> createSearchRow(
+		not_null<PeerData*> peer) override;
+	std::unique_ptr<PeerListRow> createRestoredRow(
+		not_null<PeerData*> peer) override;
+
+private:
+	std::unique_ptr<PeerListRow> createRow(
+		not_null<ChannelData*> channel) const;
+
+	const not_null<PeerData*> _peer;
+	const std::shared_ptr<Ui::Show> _show;
+
+	std::vector<not_null<PeerData*>> _selected;
+
+	rpl::lifetime _apiLifetime;
+
+};
+
 } // namespace Giveaway