Added deserialization from JSON to statistics data.

Telegram/CMakeLists.txt

@@ -1286,6 +1286,8 @@ PRIVATE
     statistics/segment_tree.h
     statistics/statistics_box.cpp
     statistics/statistics_box.h
+    statistics/statistics_data_deserialize.cpp
+    statistics/statistics_data_deserialize.h
     storage/details/storage_file_utilities.cpp
     storage/details/storage_file_utilities.h
     storage/details/storage_settings_scheme.cpp

Telegram/SourceFiles/statistics/statistics_data_deserialize.cpp

@@ -0,0 +1,94 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "statistics/statistics_data_deserialize.h"
+
+#include "data/data_statistics.h"
+
+#include <QtCore/QJsonArray>
+#include <QtCore/QJsonDocument>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonValue>
+
+namespace Statistic {
+
+Data::StatisticalChart StatisticalChartFromJSON(const QByteArray &json) {
+	auto error = QJsonParseError{ 0, QJsonParseError::NoError };
+	const auto document = QJsonDocument::fromJson(json, &error);
+	if (error.error != QJsonParseError::NoError || !document.isObject()) {
+		LOG(("API Error: Bad stats graph json received."));
+		return {};
+	}
+	const auto root = document.object();
+	const auto columns = root.value(u"columns"_q).toArray();
+	if (columns.empty()) {
+		LOG(("API Error: Empty columns list from stats graph received."));
+		return {};
+	}
+	auto result = Data::StatisticalChart();
+	for (const auto &column : columns) {
+		const auto array = column.toArray();
+		if (array.empty()) {
+			LOG(("API Error: Empty column from stats graph received."));
+			return {};
+		}
+		const auto columnId = array.first().toString();
+		if (columnId == u"x"_q) {
+			const auto length = array.size() - 1;
+			result.x.resize(length);
+			for (auto i = 0; i < length; i++) {
+				result.x[i] = array.at(i + 1).toDouble();
+			}
+		} else {
+			auto line = Data::StatisticalChart::Line();
+			const auto length = array.size() - 1;
+			line.id = columnId;
+			line.y.resize(length);
+			for (auto i = 0; i < length; i++) {
+				const auto value = array.at(i + 1).toInt();
+				line.y[i] = value;
+				if (value > line.maxValue) {
+					line.maxValue = value;
+				}
+				if (value < line.minValue) {
+					line.minValue = value;
+				}
+			}
+			result.lines.push_back(std::move(line));
+		}
+		if (result.x.size() > 1) {
+			result.timeStep = result.x[1] - result.x[0];
+		} else {
+			constexpr auto kOneDay = 3600 * 24 * 1000;
+			result.timeStep = kOneDay;
+		}
+		result.measure();
+	}
+	const auto colors = root.value(u"colors"_q).toObject();
+	const auto names = root.value(u"names"_q).toObject();
+
+	const auto colorPattern = u"(.*)(#.*)"_q;
+	for (auto &line : result.lines) {
+		const auto colorIt = colors.constFind(line.id);
+		if (colorIt != colors.constEnd() && (*colorIt).isString()) {
+			const auto match = QRegularExpression(colorPattern).match(
+				colorIt->toString());
+			if (match.hasMatch()) {
+				// const auto colorKey = match.captured(1);
+				line.color = QColor(match.captured(2));
+			}
+		}
+		const auto nameIt = names.constFind(line.id);
+		if (nameIt != names.constEnd() && (*nameIt).isString()) {
+			line.name = nameIt->toString().replace('-', QChar(8212));
+		}
+	}
+
+	return result;
+}
+
+} // namespace Statistic

Telegram/SourceFiles/statistics/statistics_data_deserialize.h

@@ -0,0 +1,21 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+namespace Data {
+struct StatisticalChart;
+} // namespace Data
+
+class QByteArray;
+
+namespace Statistic {
+
+[[nodiscard]] Data::StatisticalChart StatisticalChartFromJSON(
+	const QByteArray &json);
+
+} // namespace Statistic