class CWeatherManager

refs #612

src/blackcore/weathermanager.cpp

@@ -0,0 +1,119 @@
+/* Copyright (C) 2016
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "weathermanager.h"
+#include "blackcore/weatherdata.h"
+#include "blackmisc/logmessage.h"
+#include "blackmisc/weather/weatherdataplugininfolist.h"
+
+using namespace BlackMisc;
+using namespace BlackMisc::Geo;
+using namespace BlackMisc::Weather;
+using namespace BlackMisc::PhysicalQuantities;
+
+namespace BlackCore
+{
+
+    CWeatherManager::CWeatherManager(QObject *parent) : QObject(parent)
+    {
+        m_pluginManagerWeatherData.collectPlugins();
+        loadWeatherDataPlugins();
+    }
+
+    void CWeatherManager::setWeatherToClear(bool value)
+    {
+        m_isWeatherClear = value;
+        // todo: send weather grid to drivers from here
+    }
+
+    void CWeatherManager::requestWeatherGrid(const CWeatherGrid &weatherGrid,
+                                             const BlackMisc::CSlot<void(const BlackMisc::Weather::CWeatherGrid &)> &callback)
+    {
+        if (m_isWeatherClear)
+        {
+            callback(CWeatherGrid::getClearWeatherGrid());
+            return;
+        }
+
+        WeatherRequest weatherRequest { weatherGrid, callback };
+        m_pendingRequests.append(weatherRequest);
+
+        // Serialize the requests, since plugins can handle only one at a time
+        if (m_pendingRequests.size() == 1) { fetchNextWeatherData(); }
+    }
+
+    bool CWeatherManager::loadWeatherDataPlugins()
+    {
+        const CWeatherDataPluginInfoList weatherDataPluginInfos = m_pluginManagerWeatherData.getAvailableWeatherDataPlugins();
+        if (weatherDataPluginInfos.isEmpty())
+        {
+            CLogMessage(this).warning("No weather data plugin found!");
+            return false;
+        }
+
+        for (const auto &pluginInfo : weatherDataPluginInfos)
+        {
+            IWeatherDataFactory *factory = m_pluginManagerWeatherData.getPluginById<IWeatherDataFactory>(pluginInfo.getIdentifier());
+            if (!factory)
+            {
+                CLogMessage(this).error("Failed to create IWeatherDataFactory for %1") << pluginInfo.getIdentifier();
+                return false;
+            }
+
+            IWeatherData *weatherData = factory->create(this);
+            if (!weatherData)
+            {
+                CLogMessage(this).error("Failed to create IWeatherData instance for %1") << pluginInfo.getIdentifier();
+                return false;
+            }
+
+            connect(weatherData, &IWeatherData::fetchingFinished, this, &CWeatherManager::handleNextRequest);
+            m_weatherDataPlugins.append(weatherData);
+            delete factory;
+        }
+        return true;
+    }
+
+    void CWeatherManager::fetchNextWeatherData()
+    {
+        const WeatherRequest weatherRequest = m_pendingRequests.first();
+        PhysicalQuantities::CLength maxDistance(100.0, CLengthUnit::km());
+
+        for (IWeatherData *plugin : m_weatherDataPlugins)
+        {
+            plugin->fetchWeatherData(weatherRequest.weatherGrid, maxDistance);
+        }
+    }
+
+    void CWeatherManager::handleNextRequest()
+    {
+        Q_ASSERT(!m_pendingRequests.isEmpty());
+
+        IWeatherData *weatherDataPlugin = qobject_cast<IWeatherData *>(sender());
+        Q_ASSERT(weatherDataPlugin);
+        auto fetchedWeatherGrid = weatherDataPlugin->getWeatherData();
+
+        const WeatherRequest weatherRequest = m_pendingRequests.first();
+        CWeatherGrid requestedWeatherGrid = weatherRequest.weatherGrid;
+
+        // Interpolation. So far it just picks the closest point without interpolation.
+        for (CGridPoint &gridPoint : requestedWeatherGrid)
+        {
+            const auto nearestGridPoint = fetchedWeatherGrid.findClosest(1, gridPoint.getPosition()).frontOrDefault();
+            gridPoint.copyWeatherDataFrom(nearestGridPoint);
+        }
+
+        weatherRequest.callback(requestedWeatherGrid);
+        m_pendingRequests.pop_front();
+
+        // In case there are pending requests, start over again
+        if (m_pendingRequests.size() > 0) { fetchNextWeatherData(); }
+    }
+
+}