Added API support for request of async zoom single chart.

Telegram/SourceFiles/api/api_statistics.cpp

@@ -20,11 +20,17 @@ namespace {
 		const MTPStatsGraph &tl) {
 	return tl.match([&](const MTPDstatsGraph &d) {
 		using namespace Statistic;
+		const auto zoomToken = d.vzoom_token().has_value()
+			? qs(*d.vzoom_token()).toUtf8()
+			: QByteArray();
 		return Data::StatisticalGraph{
 			StatisticalChartFromJSON(qs(d.vjson().data().vdata()).toUtf8()),
+			zoomToken,
 		};
 	}, [&](const MTPDstatsGraphAsync &data) {
-		return Data::StatisticalGraph{ Data::StatisticalChart() };
+		return Data::StatisticalGraph{
+			.zoomToken = qs(data.vtoken()).toUtf8(),
+		};
 	}, [&](const MTPDstatsGraphError &data) {
 		return Data::StatisticalGraph{ Data::StatisticalChart() };
 	});
@@ -135,6 +141,34 @@ rpl::producer<rpl::no_value, QString> Statistics::request(
 	};
 }
 
+rpl::producer<Data::StatisticalGraph, QString> Statistics::requestZoom(
+		not_null<PeerData*> peer,
+		const QString &token,
+		float64 x) {
+	return [=](auto consumer) {
+		auto lifetime = rpl::lifetime();
+		const auto channel = peer->asChannel();
+		if (!channel) {
+			return lifetime;
+		}
+
+		_api.request(MTPstats_LoadAsyncGraph(
+			MTP_flags(x
+				? MTPstats_LoadAsyncGraph::Flag::f_x
+				: MTPstats_LoadAsyncGraph::Flag(0)),
+			MTP_string(token),
+			MTP_long(x)
+		)).done([=](const MTPStatsGraph &result) {
+			consumer.put_next(StatisticalGraphFromTL(result));
+			consumer.put_done();
+		}).fail([=](const MTP::Error &error) {
+			consumer.put_error_copy(error.type());
+		}).send();
+
+		return lifetime;
+	};
+}
+
 Data::ChannelStatistics Statistics::channelStats() const {
 	return _channelStats;
 }

Telegram/SourceFiles/api/api_statistics.h

@@ -21,6 +21,10 @@ public:
 
 	[[nodiscard]] rpl::producer<rpl::no_value, QString> request(
 		not_null<PeerData*> peer);
+	[[nodiscard]] rpl::producer<Data::StatisticalGraph, QString> requestZoom(
+		not_null<PeerData*> peer,
+		const QString &token,
+		float64 x);
 
 	[[nodiscard]] Data::ChannelStatistics channelStats() const;
 

Telegram/SourceFiles/data/data_statistics.h

@@ -84,6 +84,7 @@ struct StatisticalChart {
 
 struct StatisticalGraph final {
 	StatisticalChart chart;
+	QString zoomToken;
 };
 
 struct StatisticalValue final {