Add logging support

libnymea-energy/energylogs.cpp

@@ -0,0 +1,108 @@
+#include "energylogs.h"
+
+#include <QVariant>
+
+EnergyLogs::EnergyLogs(QObject *parent): QObject(parent)
+{
+
+}
+
+PowerBalanceLogEntry::PowerBalanceLogEntry()
+{
+
+}
+
+PowerBalanceLogEntry::PowerBalanceLogEntry(const QDateTime &timestamp, double consumption, double production, double acquisition, double storage):
+    m_timestamp(timestamp),
+    m_consumption(consumption),
+    m_production(production),
+    m_acquisition(acquisition),
+    m_storage(storage)
+{
+
+}
+
+QDateTime PowerBalanceLogEntry::timestamp() const
+{
+    return m_timestamp;
+}
+
+double PowerBalanceLogEntry::consumption() const
+{
+    return m_consumption;
+}
+
+double PowerBalanceLogEntry::production() const
+{
+    return m_production;
+}
+
+double PowerBalanceLogEntry::acquisition() const
+{
+    return m_acquisition;
+}
+
+double PowerBalanceLogEntry::storage() const
+{
+    return m_storage;
+}
+
+QVariant PowerBalanceLogEntries::get(int index) const
+{
+    return QVariant::fromValue(at(index));
+}
+
+void PowerBalanceLogEntries::put(const QVariant &variant)
+{
+    append(variant.value<PowerBalanceLogEntry>());
+}
+
+ThingPowerLogEntry::ThingPowerLogEntry()
+{
+
+}
+
+ThingPowerLogEntry::ThingPowerLogEntry(const QDateTime &timestamp, const ThingId &thingId, double currentPower, double totalConsumption, double totalProduction):
+    m_timestamp(timestamp),
+    m_thingId(thingId),
+    m_currentPower(currentPower),
+    m_totalConsumption(totalConsumption),
+    m_totalProduction(totalProduction)
+{
+
+}
+
+QDateTime ThingPowerLogEntry::timestamp() const
+{
+    return m_timestamp;
+}
+
+ThingId ThingPowerLogEntry::thingId() const
+{
+    return m_thingId;
+}
+
+double ThingPowerLogEntry::currentPower() const
+{
+    return m_currentPower;
+}
+
+double ThingPowerLogEntry::totalConsumption() const
+{
+    return m_totalConsumption;
+}
+
+double ThingPowerLogEntry::totalProduction() const
+{
+    return m_totalProduction;
+}
+
+QVariant ThingPowerLogEntries::get(int index) const
+{
+    return QVariant::fromValue(at(index));
+}
+
+void ThingPowerLogEntries::put(const QVariant &variant)
+{
+    append(variant.value<ThingPowerLogEntry>());
+}

libnymea-energy/energylogs.h

@@ -0,0 +1,125 @@
+#ifndef ENERGYLOGS_H
+#define ENERGYLOGS_H
+
+#include <QObject>
+#include <QDateTime>
+#include <QVariant>
+
+#include <typeutils.h>
+
+class PowerBalanceLogEntry;
+class PowerBalanceLogEntries;
+class ThingPowerLogEntry;
+class ThingPowerLogEntries;
+
+class EnergyLogs: public QObject
+{
+    Q_OBJECT
+public:
+    EnergyLogs(QObject *parent = nullptr);
+    virtual ~EnergyLogs() = default;
+
+    enum SampleRate {
+        SampleRate1Min = 1,
+        SampleRate15Mins = 15,
+        SampleRate1Hour = 60,
+        SampleRate3Hours = 180,
+        SampleRate1Day = 1440,
+        SampleRate1Week = 10080,
+        SampleRate1Month = 43200,
+        SampleRate1Year = 525600
+    };
+    Q_ENUM(SampleRate)
+
+    /*! Returns logs for the given sample rate for total household consumption, production, acquisition and storage balance.
+     *  From and to may be given to limit results to a time span.
+    */
+    virtual PowerBalanceLogEntries powerBalanceLogs(SampleRate sampleRate, const QDateTime &from = QDateTime(), const QDateTime &to = QDateTime()) const = 0;
+
+    /*! Returns logs for the given sample rate for currentPower, totalEnergyConsumed and totalEnergyProduced for the given things.
+     *  From and to may be given to limie results to a time span.
+     *  If thingIds is empty, all things will be returned.
+     */
+    virtual ThingPowerLogEntries thingPowerLogs(SampleRate sampleRate, const QList<ThingId> &thingIds, const QDateTime &from = QDateTime(), const QDateTime &to = QDateTime()) const = 0;
+
+signals:
+    void powerBalanceEntryAdded(SampleRate sampleRate, const PowerBalanceLogEntry &entry);
+    void thingPowerEntryAdded(SampleRate sampleRate, const ThingPowerLogEntry &entry);
+
+};
+
+
+class PowerBalanceLogEntry
+{
+    Q_GADGET
+    Q_PROPERTY(QDateTime timestamp READ timestamp)
+    Q_PROPERTY(double consumption READ consumption)
+    Q_PROPERTY(double production READ production)
+    Q_PROPERTY(double acquisition READ acquisition)
+    Q_PROPERTY(double storage READ storage)
+public:
+    PowerBalanceLogEntry();
+    PowerBalanceLogEntry(const QDateTime &timestamp, double consumption, double production, double acquisition, double storage);
+    QDateTime timestamp() const;
+    double consumption() const;
+    double production() const;
+    double acquisition() const;
+    double storage() const;
+private:
+    QDateTime m_timestamp;
+    double m_consumption = 0;
+    double m_production = 0;
+    double m_acquisition = 0;
+    double m_storage = 0;
+};
+Q_DECLARE_METATYPE(PowerBalanceLogEntry)
+
+class PowerBalanceLogEntries: public QList<PowerBalanceLogEntry>
+{
+    Q_GADGET
+    Q_PROPERTY(int count READ count)
+public:
+    PowerBalanceLogEntries() = default;
+    PowerBalanceLogEntries(const QList<PowerBalanceLogEntry> &other);
+    Q_INVOKABLE QVariant get(int index) const;
+    Q_INVOKABLE void put(const QVariant &variant);
+};
+Q_DECLARE_METATYPE(PowerBalanceLogEntries)
+
+class ThingPowerLogEntry {
+    Q_GADGET
+    Q_PROPERTY(QDateTime timstamp READ timestamp)
+    Q_PROPERTY(QUuid thingId READ thingId)
+    Q_PROPERTY(double currentPower READ currentPower)
+    Q_PROPERTY(double totalConsumption READ totalConsumption)
+    Q_PROPERTY(double totalProduction READ totalProduction)
+public:
+    ThingPowerLogEntry();
+    ThingPowerLogEntry(const QDateTime &timestamp, const ThingId &thingId, double currentPower, double totalConsumption, double totalProuction);
+    QDateTime timestamp() const;
+    ThingId thingId() const;
+    double currentPower() const;
+    double totalConsumption() const;
+    double totalProduction() const;
+private:
+    QDateTime m_timestamp;
+    ThingId m_thingId;
+    double m_currentPower = 0;
+    double m_totalConsumption = 0;
+    double m_totalProduction = 0;
+};
+Q_DECLARE_METATYPE(ThingPowerLogEntry)
+
+class ThingPowerLogEntries: public QList<ThingPowerLogEntry>
+{
+    Q_GADGET
+    Q_PROPERTY(int count READ count)
+public:
+    ThingPowerLogEntries() = default;
+    ThingPowerLogEntries(const QList<ThingPowerLogEntry> &other): QList<ThingPowerLogEntry>(other) {}
+    Q_INVOKABLE QVariant get(int index) const;
+    Q_INVOKABLE void put(const QVariant &variant);
+};
+Q_DECLARE_METATYPE(ThingPowerLogEntries)
+
+#endif // ENERGYLOGS_H

libnymea-energy/energymanager.h

@@ -32,10 +32,13 @@
 #ifndef ENERGYMANAGER_H
 #define ENERGYMANAGER_H
 
+#include "energylogs.h"
+
 #include <QObject>
 
 #include <integrations/thing.h>
 
+
 class EnergyManager : public QObject
 {
     Q_OBJECT
@@ -47,6 +50,7 @@ public:
     };
     Q_ENUM(EnergyError)
 
+
     explicit EnergyManager(QObject *parent = nullptr);
     virtual ~EnergyManager() = default;
 
@@ -56,6 +60,9 @@ public:
     virtual double currentPowerConsumption() const = 0;
     virtual double currentPowerProduction() const = 0;
     virtual double currentPowerAcquisition() const = 0;
+    virtual double currentPowerStorage() const = 0;
+
+    virtual EnergyLogs* logs() const = 0;
 
 signals:
     void rootMeterChanged();

libnymea-energy/libnymea-energy.pro

@@ -9,10 +9,12 @@ PKGCONFIG += nymea
 
 
 HEADERS += \
+    energylogs.h \
     energymanager.h \
     energyplugin.h
 
 SOURCES += \
+    energylogs.cpp \
     energymanager.cpp \
     energyplugin.cpp
 

plugin/energyjsonhandler.cpp

@@ -8,6 +8,10 @@ EnergyJsonHandler::EnergyJsonHandler(EnergyManager *energyManager, QObject *pare
     m_energyManager(energyManager)
 {
     registerEnum<EnergyManager::EnergyError>();
+    registerEnum<EnergyLogs::SampleRate>();
+
+    registerObject<PowerBalanceLogEntry, PowerBalanceLogEntries>();
+    registerObject<ThingPowerLogEntry, ThingPowerLogEntries>();
 
     QVariantMap params, returns;
     QString description;
@@ -30,18 +34,51 @@ EnergyJsonHandler::EnergyJsonHandler(EnergyManager *energyManager, QObject *pare
     returns.insert("currentPowerAcquisition", enumValueName(Double));
     registerMethod("GetPowerBalance", description, params, returns);
 
+    params.clear(); returns.clear();
+    description = "Get logs for the power balance. If from is not give, the log will start at the beginning of "
+                  "recording. If to is not given, the logs will and at the last sample for this sample rate before now.";
+    params.insert("sampleRate", enumRef<EnergyLogs::SampleRate>());
+    params.insert("o:from", enumValueName(Uint));
+    params.insert("o:to", enumValueName(Uint));
+    returns.insert("powerBalanceLogEntries", objectRef<PowerBalanceLogEntries>());
+    registerMethod("GetPowerBalanceLogs", description, params, returns);
+
+    params.clear(); returns.clear();
+    description = "Get logs for one or more things power values. If thingIds is not given, logs for all energy related "
+                  "things will be returned. If from is not given, the log will start at the beginning of recording. If "
+                  "to is not given, the logs will and at the last sample for this sample rate before now.";
+    params.insert("sampleRate", enumRef<EnergyLogs::SampleRate>());
+    params.insert("o:thingIds", QVariantList() << enumValueName(Uuid));
+    params.insert("o:from", enumValueName(Uint));
+    params.insert("o:to", enumValueName(Uint));
+    returns.insert("thingPowerLogEntries", objectRef<ThingPowerLogEntries>());
+    registerMethod("GetThingPowerLogs", description, params, returns);
+
     params.clear();
     description = "Emitted whenever the root meter id changes. If the root meter has been unset, the params will be empty.";
     params.insert("o:rootMeterThingId", enumValueName(Uuid));
     registerNotification("RootMeterChanged", description, params);
 
     params.clear();
-    description = "Emitted whenever the energy balance changes. That is, when the current consumption, production or acquisition changes. Typically they will all change at the same time.";
+    description = "Emitted whenever the energy balance changes. That is, when the current consumption, production or "
+                  "acquisition changes. Typically they will all change at the same time.";
     params.insert("currentPowerConsumption", enumValueName(Double));
     params.insert("currentPowerProduction", enumValueName(Double));
     params.insert("currentPowerAcquisition", enumValueName(Double));
     registerNotification("PowerBalanceChanged", description, params);
 
+    params.clear();
+    description = "Emitted whenever a entry is added to the power balance log.";
+    params.insert("sampleRate", enumRef<EnergyLogs::SampleRate>());
+    params.insert("powerBalanceLogEntry", objectRef<PowerBalanceLogEntry>());
+    registerNotification("PowerBalanceLogEntryAdded", description, params);
+
+    params.clear();
+    description = "Emitted whenever a entry is added to the thing power log.";
+    params.insert("sampleRate", enumRef<EnergyLogs::SampleRate>());
+    params.insert("thingPowerLogEntry", objectRef<ThingPowerLogEntry>());
+    registerNotification("ThingPowerLogEntryAdded", description, params);
+
     connect(m_energyManager, &EnergyManager::rootMeterChanged, this, [=](){
         QVariantMap params;
         if (m_energyManager->rootMeter()) {
@@ -57,6 +94,20 @@ EnergyJsonHandler::EnergyJsonHandler(EnergyManager *energyManager, QObject *pare
         params.insert("currentPowerAcquisition", m_energyManager->currentPowerAcquisition());
         emit PowerBalanceChanged(params);
     });
+
+    connect(m_energyManager->logs(), &EnergyLogs::powerBalanceEntryAdded, this, [=](EnergyLogs::SampleRate sampleRate, const PowerBalanceLogEntry &entry){
+        QVariantMap params;
+        params.insert("sampleRate", enumValueName(sampleRate));
+        params.insert("powerBalanceLogEntry", pack(entry));
+        emit PowerBalanceLogEntryAdded(params);
+    });
+
+    connect(m_energyManager->logs(), &EnergyLogs::thingPowerEntryAdded, this, [=](EnergyLogs::SampleRate sampleRate, const ThingPowerLogEntry &entry){
+        QVariantMap params;
+        params.insert("sampleRate", enumValueName(sampleRate));
+        params.insert("thingPowerLogEntry", pack(entry));
+        emit ThingPowerLogEntryAdded(params);
+    });
 }
 
 QString EnergyJsonHandler::name() const
@@ -96,3 +147,30 @@ JsonReply *EnergyJsonHandler::GetPowerBalance(const QVariantMap &params)
     ret.insert("currentPowerAcquisition", m_energyManager->currentPowerAcquisition());
     return createReply(ret);
 }
+
+JsonReply *EnergyJsonHandler::GetPowerBalanceLogs(const QVariantMap &params)
+{
+    qCDebug(dcEnergyExperience()) << "params" << params;
+    qCDebug(dcEnergyExperience()) << "from" << params.value("from");
+    EnergyLogs::SampleRate sampleRate = enumNameToValue<EnergyLogs::SampleRate>(params.value("sampleRate").toString());
+    QDateTime from = params.contains("from") ? QDateTime::fromMSecsSinceEpoch(params.value("from").toLongLong() * 1000) : QDateTime();
+    qCDebug(dcEnergyExperience()) << "from2" << from;
+    QDateTime to = params.contains("to") ? QDateTime::fromMSecsSinceEpoch(params.value("to").toLongLong() * 1000) : QDateTime();
+    QVariantMap returns;
+    returns.insert("powerBalanceLogEntries", pack(m_energyManager->logs()->powerBalanceLogs(sampleRate, from, to)));
+    return createReply(returns);
+}
+
+JsonReply *EnergyJsonHandler::GetThingPowerLogs(const QVariantMap &params)
+{
+    EnergyLogs::SampleRate sampleRate = enumNameToValue<EnergyLogs::SampleRate>(params.value("sampleRate").toString());
+    QList<ThingId> thingIds;
+    foreach (const QVariant &thingId, params.value("thingIds").toList()) {
+        thingIds.append(thingId.toUuid());
+    }
+    QDateTime from = params.contains("from") ? QDateTime::fromMSecsSinceEpoch(params.value("from").toLongLong() * 1000) : QDateTime();
+    QDateTime to = params.contains("to") ? QDateTime::fromMSecsSinceEpoch(params.value("to").toLongLong() * 1000) : QDateTime();
+    QVariantMap returns;
+    returns.insert("thingPowerLogEntries",pack(m_energyManager->logs()->thingPowerLogs(sampleRate, thingIds, from, to)));
+    return createReply(returns);
+}

plugin/energyjsonhandler.h

@@ -17,15 +17,17 @@ public:
     Q_INVOKABLE JsonReply* GetRootMeter(const QVariantMap &params);
     Q_INVOKABLE JsonReply* SetRootMeter(const QVariantMap &params);
     Q_INVOKABLE JsonReply* GetPowerBalance(const QVariantMap &params);
+    Q_INVOKABLE JsonReply* GetPowerBalanceLogs(const QVariantMap &params);
+    Q_INVOKABLE JsonReply* GetThingPowerLogs(const QVariantMap &params);
 
 signals:
     void RootMeterChanged(const QVariantMap &params);
-
     void PowerBalanceChanged(const QVariantMap &params);
+    void PowerBalanceLogEntryAdded(const QVariantMap &params);
+    void ThingPowerLogEntryAdded(const QVariantMap &params);
 
 private:
     EnergyManager *m_energyManager = nullptr;
-
 };
 
 #endif // ENERGYJSONHANDLER_H

plugin/energylogger.cpp

@@ -0,0 +1,637 @@
+#include "energylogger.h"
+
+#include <nymeasettings.h>
+
+#include <QStandardPaths>
+#include <QDir>
+#include <QSqlQuery>
+#include <QSqlError>
+#include <QSettings>
+
+#include <QLoggingCategory>
+Q_DECLARE_LOGGING_CATEGORY(dcEnergyExperience)
+
+EnergyLogger::EnergyLogger(QObject *parent) : EnergyLogs(parent)
+{
+    if (!initDB()) {
+        qCCritical(dcEnergyExperience()) << "Unable to open energy log. Energy logs will not be available.";
+        return;
+    }
+
+    // Logging configuration
+    // Note: SampleRate1Min is always sampled as it is the base series for others
+    // Make sure your base series always has enough samples to build a full sample
+    // of all series building on it.
+
+    // Disk space considerations;
+    // Each entry takes approx 30 bytes for powerBalance + 50 bytes for thingCurrentPower per thing of disk space
+    // SQLite adds metadata and overhead of about 5%
+    // The resulting database size can be estimated with (count being the sum of all numbers below):
+    // (count * 30 bytes) + (count * things * 50 bytes) + 5%
+    // 10000 entries, with 5 energy things => ~3MB
+
+    m_maxMinuteSamples = 15;
+
+    addConfig(SampleRate15Mins, SampleRate1Min, 6720); // 10 weeks
+    addConfig(SampleRate1Hour, SampleRate15Mins, 1680); // 10 weeks
+    addConfig(SampleRate3Hours, SampleRate15Mins, 560); // 10 weeks
+    addConfig(SampleRate1Day, SampleRate1Hour, 1095); // 3 years
+    addConfig(SampleRate1Week, SampleRate1Day, 168); // 3 years
+    addConfig(SampleRate1Month, SampleRate1Day, 240); // 20 years
+    addConfig(SampleRate1Year, SampleRate1Month, 20); // 20 years
+
+    // Load thingIds from logs so we have the complete list available for sampling, even if a thing might not produce any logs for a while.
+    QSqlQuery query(m_db);
+    query.prepare("SELECT DISTINCT thingId FROM thingPower;");
+    query.exec();
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Failed to load existing things from logs:" << query.lastError();
+    } else {
+        while (query.next()) {
+            m_thingsPowerLiveLogs[query.value("thingId").toUuid()] = ThingPowerLogEntries();
+        }
+    }
+
+    // Start the scheduling
+
+    scheduleNextSample(SampleRate1Min);
+    foreach (SampleRate sampleRate, m_configs.keys()) {
+        scheduleNextSample(sampleRate);
+    }
+
+    // Now all the data is initialized. We can start with sampling.
+
+    // First check if we missed any samplings (e.g. because the system was offline at the time when it should have created a sample)
+    foreach(SampleRate sampleRate, m_configs.keys()) {
+        rectifySamples(sampleRate, m_configs.value(sampleRate).baseSampleRate);
+    }
+
+    // And start the sampler timer
+    connect(&m_sampleTimer, &QTimer::timeout, this, &EnergyLogger::sample);
+    m_sampleTimer.start(1000);
+}
+
+void EnergyLogger::logPowerBalance(double consumption, double production, double acquisition, double storage)
+{
+    PowerBalanceLogEntry entry(QDateTime::currentDateTime(), consumption, production, acquisition, storage);
+
+    // Add everything to livelog, keep that for one day, in memory only
+    m_balanceLiveLog.prepend(entry);
+    while (m_balanceLiveLog.count() > 1 && m_balanceLiveLog.last().timestamp().addDays(1) < QDateTime::currentDateTime()) {
+        qCDebug(dcEnergyExperience) << "Discarding livelog entry from" << m_balanceLiveLog.last().timestamp().toString();
+        m_balanceLiveLog.removeLast();
+    }
+}
+
+void EnergyLogger::logThingPower(const ThingId &thingId, double currentPower, double totalConsumption, double totalProduction)
+{
+    qCDebug(dcEnergyExperience()) << "Logging thing power:" << currentPower << totalConsumption << totalProduction;
+    ThingPowerLogEntry entry(QDateTime::currentDateTime(), thingId, currentPower, totalConsumption, totalProduction);
+
+    m_thingsPowerLiveLogs[thingId].prepend(entry);
+    while (m_thingsPowerLiveLogs[thingId].count() > 1 && m_thingsPowerLiveLogs[thingId].last().timestamp().addDays(1) < QDateTime::currentDateTime()) {
+        qCDebug(dcEnergyExperience()) << "Discarding thing power livelog entry for thing" << thingId << "from" << m_thingsPowerLiveLogs[thingId].last().timestamp().toString();
+        m_thingsPowerLiveLogs[thingId].removeLast();
+    }
+}
+PowerBalanceLogEntries EnergyLogger::powerBalanceLogs(SampleRate sampleRate, const QDateTime &from, const QDateTime &to) const
+{
+    PowerBalanceLogEntries result;
+
+    QSqlQuery query(m_db);
+    QString queryString = "SELECT * FROM powerBalance WHERE sampleRate = ?";
+    QVariantList bindValues;
+    bindValues << sampleRate;
+    qCDebug(dcEnergyExperience()) << "Fetching logs. Timestamp:" << from << from.isNull();
+    if (!from.isNull()) {
+        queryString += " AND timestamp >= ?";
+        bindValues << from.toMSecsSinceEpoch();
+    }
+    if (!to.isNull()) {
+        queryString += " AND timestamp <= ?";
+        bindValues << to.toMSecsSinceEpoch();
+    }
+    query.prepare(queryString);
+    foreach (const QVariant &bindValue, bindValues) {
+        query.addBindValue(bindValue);
+    }
+
+    qCDebug(dcEnergyExperience()) << "Executing" << queryString << query.executedQuery() << bindValues;
+    query.exec();
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Error fetching power balance logs:" << query.lastError() << query.executedQuery();
+        return result;
+    }
+
+    while (query.next()) {
+        qCDebug(dcEnergyExperience()) << "Adding result";
+        result.append(PowerBalanceLogEntry(QDateTime::fromMSecsSinceEpoch(query.value("timestamp").toLongLong()), query.value("consumption").toDouble(), query.value("production").toDouble(), query.value("acquisition").toDouble(), query.value("storage").toDouble()));
+    }
+    return result;
+}
+
+ThingPowerLogEntries EnergyLogger::thingPowerLogs(SampleRate sampleRate, const QList<ThingId> &thingIds, const QDateTime &from, const QDateTime &to) const
+{
+    ThingPowerLogEntries result;
+
+    QSqlQuery query(m_db);
+    QString queryString = "SELECT * FROM thingPower WHERE sampleRate = ?";
+    QVariantList bindValues;
+    bindValues << sampleRate;
+
+    QStringList thingsQuery;
+    foreach (const ThingId &thingId, thingIds) {
+        thingsQuery.append("thingId = ?");
+        bindValues << thingId;
+    }
+    if (!thingsQuery.isEmpty()) {
+        queryString += "AND (" + thingsQuery.join(" OR ") + " )";
+    }
+
+    if (!from.isNull()) {
+        queryString += " AND timestamp >= ?";
+        bindValues << from.toMSecsSinceEpoch();
+    }
+    if (!to.isNull()) {
+        queryString += " AND timestamp <= ?";
+        bindValues << to.toMSecsSinceEpoch();
+    }
+    query.prepare(queryString);
+    foreach (const QVariant &bindValue, bindValues) {
+        query.addBindValue(bindValue);
+    }
+    query.exec();
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Error fetching power balance logs:" << query.lastError() << query.executedQuery();
+        return result;
+    }
+
+    while (query.next()) {
+        result.append(ThingPowerLogEntry(
+                          QDateTime::fromMSecsSinceEpoch(query.value("timestamp").toLongLong()),
+                          query.value("thingId").toUuid(),
+                          query.value("currentPower").toDouble(),
+                          query.value("totalConsumption").toDouble(),
+                          query.value("totalProduction").toDouble()));
+    }
+    return result;
+
+}
+
+void EnergyLogger::sample()
+{
+    QDateTime now = QDateTime::currentDateTime();
+
+    if (now >= m_nextSamples.value(SampleRate1Min)) {
+        QDateTime sampleEnd = m_nextSamples.value(SampleRate1Min);
+        QDateTime sampleStart = sampleEnd.addMSecs(-60 * 1000);
+
+        qCDebug(dcEnergyExperience()) << "Sampling 1 min" << sampleEnd.toString();
+
+        double medianConsumption = 0;
+        double medianProduction = 0;
+        double medianAcquisition = 0;
+        double medianStorage = 0;
+        for (int i = 0; i < m_balanceLiveLog.count(); i++) {
+            const PowerBalanceLogEntry &entry = m_balanceLiveLog.at(i);
+            QDateTime frameStart = (entry.timestamp() < sampleStart) ? sampleStart : entry.timestamp();
+            QDateTime frameEnd = i == 0 ? sampleEnd : m_balanceLiveLog.at(i-1).timestamp();
+            int frameDuration = frameStart.msecsTo(frameEnd);
+            medianConsumption += entry.consumption() * frameDuration;
+            medianProduction += entry.production() * frameDuration;
+            medianAcquisition += entry.acquisition() * frameDuration;
+            medianStorage += entry.storage() * frameDuration;
+//            qCDebug(dcEnergyExperience()) << "Frame" << i << "duration:" << frameDuration << "value:" << entry.consumption << "start" << frameStart.toString() << "end" << frameEnd.toString();
+            if (entry.timestamp() < sampleStart) {
+                break;
+            }
+        }
+        medianConsumption /= sampleStart.msecsTo(sampleEnd);
+        medianProduction /= sampleStart.msecsTo(sampleEnd);
+        medianAcquisition /= sampleStart.msecsTo(sampleEnd);
+        medianStorage /= sampleStart.msecsTo(sampleEnd);
+        qCDebug(dcEnergyExperience()) << "Power balance for sample:" << medianConsumption << medianProduction << medianAcquisition << medianStorage << "duration:" << sampleStart.msecsTo(sampleEnd);
+        insertPowerBalance(sampleEnd, SampleRate1Min, medianConsumption, medianProduction, medianAcquisition, medianStorage);
+
+        foreach (const ThingId &thingId, m_thingsPowerLiveLogs.keys()) {
+            medianConsumption = 0;
+            ThingPowerLogEntries entries = m_thingsPowerLiveLogs.value(thingId);
+            for (int i = 0; i < entries.count(); i++) {
+                const ThingPowerLogEntry &entry = entries.at(i);
+                QDateTime frameStart = (entry.timestamp() < sampleStart) ? sampleStart : entry.timestamp();
+                QDateTime frameEnd = i == 0 ? sampleEnd : entries.at(i-1).timestamp();
+                int frameDuration = frameStart.msecsTo(frameEnd);
+                medianConsumption += entry.currentPower() * frameDuration;
+//                qCDebug(dcEnergyExperience()) << "Frame" << i << "duration:" << frameDuration << "value:" << entry.value;
+                if (entry.timestamp() < sampleStart) {
+                    break;
+                }
+            }
+            medianConsumption /= sampleStart.msecsTo(sampleEnd);
+            double totalConsumption = 0;
+            double totalProduction = 0;
+            if (entries.count() > 0) {
+                totalConsumption = entries.last().totalConsumption();
+                totalProduction = entries.last().totalProduction();
+            }
+            qCDebug(dcEnergyExperience()) << "Thing power of sample:" << medianConsumption << totalConsumption << totalProduction << "total duration:" << sampleStart.msecsTo(sampleEnd);
+            insertThingPower(sampleEnd, SampleRate1Min, thingId, medianConsumption, totalConsumption, totalProduction);
+        }
+    }
+
+    // First sample all the configs.
+    foreach (SampleRate sampleRate, m_configs.keys()) {
+        if (now >= m_nextSamples.value(sampleRate)) {
+            QDateTime sampleTime = m_nextSamples.value(sampleRate);
+            SampleRate baseSampleRate = m_configs.value(sampleRate).baseSampleRate;
+            samplePowerBalance(sampleRate, baseSampleRate, sampleTime);
+            sampleThingsPower(sampleRate, baseSampleRate, sampleTime);
+        }
+    }
+
+    // and then trim them
+    if (now > m_nextSamples.value(SampleRate1Min)) {
+        QDateTime sampleTime = m_nextSamples.value(SampleRate1Min);
+        QDateTime oldestTimestamp = sampleTime.addMSecs(-m_maxMinuteSamples * 60 * 1000);
+        trimPowerBalance(SampleRate1Min, oldestTimestamp);
+        foreach (const ThingId &thingId, m_thingsPowerLiveLogs.keys()) {
+            trimThingPower(thingId, SampleRate1Min, oldestTimestamp);
+        }
+    }
+    foreach (SampleRate sampleRate, m_configs.keys()) {
+        if (now >= m_nextSamples.value(sampleRate)) {
+            QDateTime sampleTime = m_nextSamples.value(sampleRate);
+            QDateTime oldestTimestamp = sampleTime.addMSecs(-m_configs.value(sampleRate).maxSamples * sampleRate * 60 * 1000);
+            trimPowerBalance(sampleRate, oldestTimestamp);
+            foreach (const ThingId &thingId, m_thingsPowerLiveLogs.keys()) {
+                trimThingPower(thingId, sampleRate, oldestTimestamp);
+            }
+        }
+    }
+
+    // Lastly we reschedule the next sample for each config
+    // Note: keep this at the end as the previous stuff uses the schedule to work
+    if (now > m_nextSamples.value(SampleRate1Min)) {
+        scheduleNextSample(SampleRate1Min);
+    }
+    foreach (SampleRate sampleRate, m_configs.keys()) {
+        if (now >= m_nextSamples.value(sampleRate)) {
+            scheduleNextSample(sampleRate);
+        }
+    }
+}
+
+bool EnergyLogger::initDB()
+{
+    m_db.close();
+
+    m_db = QSqlDatabase::addDatabase("QSQLITE", "energylogs");
+    QDir path = QDir(NymeaSettings::storagePath());
+    if (!path.exists()) {
+        path.mkpath(path.path());
+    }
+    m_db.setDatabaseName(path.filePath("energylogs.sqlite"));
+
+    bool opened = m_db.open();
+    if (!opened) {
+        qCWarning(dcEnergyExperience()) << "Cannot open energy log DB at" << m_db.databaseName() << m_db.lastError();
+        return false;
+    }
+
+    if (!m_db.tables().contains("powerBalance")) {
+        qCDebug(dcEnergyExperience()) << "No \"powerBalance\" table in database. Creating it.";
+        m_db.exec("CREATE TABLE powerBalance "
+                  "("
+                  "timestamp BIGINT,"
+                  "sampleRate INT,"
+                  "consumption FLOAT,"
+                  "production FLOAT,"
+                  "acquisition FLOAT,"
+                  "storage FLOAT"
+                  ");");
+
+        if (m_db.lastError().isValid()) {
+            qCWarning(dcEnergyExperience()) << "Error creating powerBalance table in energy log database. Driver error:" << m_db.lastError().driverText() << "Database error:" << m_db.lastError().databaseText();
+            return false;
+        }
+    }
+
+    if (!m_db.tables().contains("thingPower")) {
+        qCDebug(dcEnergyExperience()) << "No \"thingPower\" table in database. Creating it.";
+        m_db.exec("CREATE TABLE thingPower "
+                  "("
+                  "timestamp BIGINT,"
+                  "sampleRate INT,"
+                  "thingId VARCHAR(38),"
+                  "currentPower FLOAT,"
+                  "totalConsumption FLOAT,"
+                  "totalProduction FLOAT"
+                  ");");
+        if (m_db.lastError().isValid()) {
+            qCWarning(dcEnergyExperience()) << "Error creating thingPower table in energy log database. Driver error:" << m_db.lastError().driverText() << "Database error:" << m_db.lastError().databaseText();
+            return false;
+        }
+    }
+
+    qCDebug(dcEnergyExperience()) << "Initialized logging DB successfully.";
+    return true;
+}
+
+void EnergyLogger::addConfig(SampleRate sampleRate, SampleRate baseSampleRate, int maxSamples)
+{
+    SampleConfig config;
+    config.baseSampleRate = baseSampleRate;
+    config.maxSamples = maxSamples;
+    m_configs.insert(sampleRate, config);
+}
+
+QDateTime EnergyLogger::getOldestPowerBalanceSampleTimestamp(SampleRate sampleRate)
+{
+    QSqlQuery query(m_db);
+    query.prepare("SELECT MIN(timestamp) AS oldestTimestamp FROM powerBalance WHERE sampleRate = ?;");
+    query.addBindValue(sampleRate);
+    query.exec();
+    if (query.next() && !query.value("oldestTimestamp").isNull()) {
+        return QDateTime::fromMSecsSinceEpoch(query.value("oldestTimestamp").toLongLong());
+    }
+    return QDateTime();
+}
+
+QDateTime EnergyLogger::getNewestPowerBalanceSampleTimestamp(SampleRate sampleRate)
+{
+    QSqlQuery query(m_db);
+    query.prepare("SELECT MAX(timestamp) AS latestTimestamp FROM powerBalance WHERE sampleRate = ?;");
+    query.addBindValue(sampleRate);
+    query.exec();
+    if (query.next() && !query.value("latestTimestamp").isNull()) {
+        return QDateTime::fromMSecsSinceEpoch(query.value("latestTimestamp").toLongLong());
+    }
+    return QDateTime();
+}
+
+QDateTime EnergyLogger::getOldestThingPowerSampleTimestamp(const ThingId &thingId, SampleRate sampleRate)
+{
+    QSqlQuery query(m_db);
+    query.prepare("SELECT MIN(timestamp) AS oldestTimestamp FROM thingPower WHERE thingId = ? AND sampleRate = ?;");
+    query.addBindValue(thingId);
+    query.addBindValue(sampleRate);
+    query.exec();
+    if (query.next() && !query.value("oldestTimestamp").isNull()) {
+        return QDateTime::fromMSecsSinceEpoch(query.value("oldestTimestamp").toLongLong());
+    }
+    return QDateTime();
+}
+
+QDateTime EnergyLogger::getNewestThingPowerSampleTimestamp(const ThingId &thingId, SampleRate sampleRate)
+{
+    QSqlQuery query(m_db);
+    query.prepare("SELECT MAX(timestamp) AS newestTimestamp FROM thingPower WHERE thingId = ? AND sampleRate = ?;");
+    query.addBindValue(thingId);
+    query.addBindValue(sampleRate);
+    query.exec();
+    if (query.next() && !query.value("newestTimestamp").isNull()) {
+        return QDateTime::fromMSecsSinceEpoch(query.value("newestTimestamp").toLongLong());
+    }
+    return QDateTime();
+}
+
+void EnergyLogger::scheduleNextSample(SampleRate sampleRate)
+{
+    QDateTime next = nextSampleTimestamp(sampleRate, QDateTime::currentDateTime());
+    m_nextSamples.insert(sampleRate, next);
+    qCDebug(dcEnergyExperience()) << "Next sample for" << sampleRate << "scheduled at" << next.toString();
+}
+
+void EnergyLogger::rectifySamples(SampleRate sampleRate, SampleRate baseSampleRate)
+{
+    // Normally we'd need to find the newest available sample of a serien and catch up from there.
+    // However, it could happen a series does not have any samples at all yet. For example if we're logging since january,
+    // and at new years the system was off, we missed the new years yearly sample and don't have any earlier. For those cases
+    // we need to start resampling from the oldest timestamp we find in the DB at all (regardless of the sampleRate)
+    QDateTime oldestBaseSample = getOldestPowerBalanceSampleTimestamp(baseSampleRate);
+    QDateTime newestSample = getNewestPowerBalanceSampleTimestamp(sampleRate);
+
+    qCDebug(dcEnergyExperience()) << "Checking for missing samples for" << sampleRate;
+    qCDebug(dcEnergyExperience()) << "Newest sample:" << newestSample.toString() << "Oldest base sample:" << oldestBaseSample.toString();
+    if (newestSample.isNull()) {
+        qCDebug(dcEnergyExperience()) << "No sample at all so far. Using base as starting point.";
+        newestSample = oldestBaseSample;
+    }
+    qCDebug(dcEnergyExperience()) << "next sample after last in series:" << nextSampleTimestamp(sampleRate, newestSample).toString();
+    qCDebug(dcEnergyExperience()) << "next scheduled sample:" << m_nextSamples.value(sampleRate).toString();
+    while (!newestSample.isNull() && nextSampleTimestamp(sampleRate, newestSample) < m_nextSamples[sampleRate]) {
+        QDateTime nextSample = nextSampleTimestamp(sampleRate, newestSample.addMSecs(1000));
+        qCDebug(dcEnergyExperience()) << "Rectifying missed sample for" << sampleRate << "from" << nextSample.toString();
+        samplePowerBalance(sampleRate, baseSampleRate, nextSample);
+        newestSample = nextSample;
+    }
+
+    foreach (const ThingId &thingId, m_thingsPowerLiveLogs.keys()) {
+        QDateTime oldestBaseSample = getOldestThingPowerSampleTimestamp(thingId, baseSampleRate);
+        QDateTime newestSample = getNewestThingPowerSampleTimestamp(thingId, sampleRate);
+
+        qCDebug(dcEnergyExperience()) << "T Checking for missing samples for" << sampleRate;
+        qCDebug(dcEnergyExperience()) << "T Newest sample:" << newestSample.toString() << "Oldest base sample:" << oldestBaseSample.toString();
+        if (newestSample.isNull()) {
+            qCDebug(dcEnergyExperience()) << "T No sample at all so far. Using base as starting point.";
+            newestSample = oldestBaseSample;
+        }
+        qCDebug(dcEnergyExperience()) << "T next sample after last in series:" << nextSampleTimestamp(sampleRate, newestSample).toString();
+        qCDebug(dcEnergyExperience()) << "T next scheduled sample:" << m_nextSamples.value(sampleRate).toString();
+        while (!newestSample.isNull() && nextSampleTimestamp(sampleRate, newestSample) < m_nextSamples[sampleRate]) {
+            QDateTime nextSample = nextSampleTimestamp(sampleRate, newestSample.addMSecs(1000));
+            qCDebug(dcEnergyExperience()) << "T Rectifying missed sample for" << sampleRate << "from" << nextSample.toString();
+            sampleThingPower(thingId, sampleRate, baseSampleRate, nextSample);
+            newestSample = nextSample;
+        }
+    }
+}
+
+QDateTime EnergyLogger::nextSampleTimestamp(SampleRate sampleRate, const QDateTime &dateTime)
+{
+    QTime time = dateTime.time();
+    QDate date = dateTime.date();
+    QDateTime next;
+    switch (sampleRate) {
+    case SampleRate1Min:
+        time.setHMS(time.hour(), time.minute(), 0);
+        next = QDateTime(date, time).addMSecs(60 * 1000);
+        break;
+    case SampleRate15Mins:
+        time.setHMS(time.hour(), time.minute() - (time.minute() % 15), 0);
+        next = QDateTime(date, time).addMSecs(15 * 60 * 1000);
+        break;
+    case SampleRate1Hour:
+        time.setHMS(time.hour(), 0, 0);
+        next = QDateTime(date, time).addMSecs(60 * 60 * 1000);
+        break;
+    case SampleRate3Hours:
+        time.setHMS(time.hour() - (time.hour() % 3), 0, 0);
+        next = QDateTime(date, time).addMSecs(3 * 60 * 60 * 1000);
+        break;
+    case SampleRate1Day:
+        next = QDateTime(date, QTime()).addDays(1);
+        break;
+    case SampleRate1Week:
+        date = date.addDays(-date.dayOfWeek() + 1);
+        next = QDateTime(date, QTime()).addDays(7);
+        break;
+    case SampleRate1Month:
+        date = date.addDays(-date.day() + 1);
+        next = QDateTime(date, QTime()).addMonths(1);
+        break;
+    case SampleRate1Year:
+        date.setDate(date.year(), 1, 1);
+        next = QDateTime(date, QTime()).addYears(1);
+        break;
+    }
+
+    return next;
+}
+
+bool EnergyLogger::samplePowerBalance(SampleRate sampleRate, SampleRate baseSampleRate, const QDateTime &sampleEnd)
+{
+    QDateTime sampleStart = sampleEnd.addMSecs(-sampleRate * 60 * 1000);
+
+    qCDebug(dcEnergyExperience()) << "Sampling" << sampleRate << "from" << sampleStart << "to" << sampleEnd;
+
+    QSqlQuery query(m_db);
+    query.prepare("SELECT * FROM powerBalance WHERE sampleRate = ? AND timestamp >= ? AND timestamp < ?;");
+    query.addBindValue(baseSampleRate);
+    query.addBindValue(sampleStart.toMSecsSinceEpoch());
+    query.addBindValue(sampleEnd.toMSecsSinceEpoch());
+    query.exec();
+
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Error fetching power balance samples for" << baseSampleRate << "from" << sampleStart.toString() << "to" << sampleEnd.toString();
+        qCWarning(dcEnergyExperience()) << "SQL error was:" << query.lastError() << "executed query:" << query.executedQuery();
+        return false;
+    }
+
+    double medianConsumption = 0;
+    double medianProduction = 0;
+    double medianAcquisition = 0;
+    double medianStorage = 0;
+    while (query.next()) {
+        qCDebug(dcEnergyExperience()) << "Frame:" << query.value("consumption").toDouble() << query.value("production").toDouble() << query.value("acquisition").toDouble() << QDateTime::fromMSecsSinceEpoch(query.value("timestamp").toLongLong()).toString();
+        medianConsumption += query.value("consumption").toDouble();
+        medianProduction += query.value("production").toDouble();
+        medianAcquisition += query.value("acquisition").toDouble();
+        medianStorage += query.value("storage").toDouble();
+    }
+    qCDebug(dcEnergyExperience()) << "Totals:" << medianConsumption << medianProduction << medianAcquisition << medianStorage << "base samplerate" << baseSampleRate << "samplerate:" << sampleRate;
+    medianConsumption = medianConsumption * baseSampleRate / sampleRate;
+    medianProduction = medianProduction * baseSampleRate / sampleRate;
+    medianAcquisition = medianAcquisition * baseSampleRate / sampleRate;
+    medianStorage = medianStorage * baseSampleRate / sampleRate;
+
+    qCDebug(dcEnergyExperience()) << "Sampled:" << medianConsumption << medianProduction << medianAcquisition << medianStorage;
+    return insertPowerBalance(sampleEnd, sampleRate, medianConsumption, medianProduction, medianAcquisition, medianStorage);
+}
+
+bool EnergyLogger::insertPowerBalance(const QDateTime &timestamp, SampleRate sampleRate, double consumption, double production, double acquisition, double storage)
+{
+    QSqlQuery query = QSqlQuery(m_db);
+    query.prepare("INSERT INTO powerBalance (timestamp, sampleRate, consumption, production, acquisition, storage) values (?, ?, ?, ?, ?, ?);");
+    query.addBindValue(timestamp.toMSecsSinceEpoch());
+    query.addBindValue(sampleRate);
+    query.addBindValue(consumption);
+    query.addBindValue(production);
+    query.addBindValue(acquisition);
+    query.addBindValue(storage);
+    query.exec();
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Error logging consumption sample:" << query.lastError();
+        return false;
+    }
+    emit powerBalanceEntryAdded(sampleRate, PowerBalanceLogEntry(timestamp, consumption, production, acquisition, storage));
+    return true;
+}
+
+bool EnergyLogger::sampleThingsPower(SampleRate sampleRate, SampleRate baseSampleRate, const QDateTime &sampleEnd)
+{
+    bool ret = true;
+    foreach (const ThingId &thingId, m_thingsPowerLiveLogs.keys()) {
+        ret &= sampleThingPower(thingId, sampleRate, baseSampleRate, sampleEnd);
+    }
+    return ret;
+}
+
+bool EnergyLogger::sampleThingPower(const ThingId &thingId, SampleRate sampleRate, SampleRate baseSampleRate, const QDateTime &sampleEnd)
+{
+    QDateTime sampleStart = sampleEnd.addMSecs(-sampleRate * 60 * 1000);
+
+    qCDebug(dcEnergyExperience()) << "Sampling" << sampleRate << "from" << sampleStart << "to" << sampleEnd;
+
+    QSqlQuery query(m_db);
+    query.prepare("SELECT * FROM thingPower WHERE thingId = ? AND sampleRate = ? AND timestamp >= ? AND timestamp < ?;");
+    query.addBindValue(thingId);
+    query.addBindValue(baseSampleRate);
+    query.addBindValue(sampleStart.toMSecsSinceEpoch());
+    query.addBindValue(sampleEnd.toMSecsSinceEpoch());
+    query.exec();
+
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Error fetching thing power samples for" << baseSampleRate << "from" << sampleStart.toString() << "to" << sampleEnd.toString();
+        qCWarning(dcEnergyExperience()) << "SQL error was:" << query.lastError() << "executed query:" << query.executedQuery();
+        return false;
+    }
+
+    double medianCurrentPower = 0;
+    while (query.next()) {
+        qCDebug(dcEnergyExperience()) << "Frame:" << query.value("currentPower").toDouble() << QDateTime::fromMSecsSinceEpoch(query.value("timestamp").toLongLong()).toString();
+        medianCurrentPower += query.value("currentPower").toDouble();
+    }
+    qCDebug(dcEnergyExperience()) << "Total:" << medianCurrentPower << "base samplerate" << baseSampleRate << "samplerate:" << sampleRate;
+    medianCurrentPower = medianCurrentPower * baseSampleRate / sampleRate;
+
+    double totalConsumption = query.value("totalConsumption").toDouble();
+    double totalProduction = query.value("totalProduction").toDouble();
+
+    qCDebug(dcEnergyExperience()) << "Sampled:" << medianCurrentPower;
+    return insertThingPower(sampleEnd, sampleRate, thingId, medianCurrentPower, totalConsumption, totalProduction);
+}
+
+bool EnergyLogger::insertThingPower(const QDateTime &timestamp, SampleRate sampleRate, const ThingId &thingId, double currentPower, double totalConsumption, double totalProduction)
+{
+    QSqlQuery query = QSqlQuery(m_db);
+    query.prepare("INSERT INTO thingPower (timestamp, sampleRate, thingId, currentPower, totalConsumption, totalProduction) values (?, ?, ?, ?, ?, ?);");
+    query.addBindValue(timestamp.toMSecsSinceEpoch());
+    query.addBindValue(sampleRate);
+    query.addBindValue(thingId);
+    query.addBindValue(currentPower);
+    query.addBindValue(totalConsumption);
+    query.addBindValue(totalProduction);
+    query.exec();
+    if (query.lastError().isValid()) {
+        qCWarning(dcEnergyExperience()) << "Error logging thing power sample:" << query.lastError() << query.executedQuery();
+        return false;
+    }
+    emit thingPowerEntryAdded(sampleRate, ThingPowerLogEntry(timestamp, thingId, currentPower, totalConsumption, totalProduction));
+    return true;
+}
+
+void EnergyLogger::trimPowerBalance(SampleRate sampleRate, const QDateTime &beforeTime)
+{
+    QSqlQuery query(m_db);
+    query.prepare("DELETE FROM powerBalance WHERE sampleRate = ? AND timestamp < ?;");
+    query.addBindValue(sampleRate);
+    query.addBindValue(beforeTime.toMSecsSinceEpoch());
+    query.exec();
+    if (query.numRowsAffected() > 0) {
+        qCDebug(dcEnergyExperience()).nospace() << "Trimmed " << query.numRowsAffected() << " from power balance series: " << sampleRate << " (Older than: " << beforeTime.toString() << ")";
+    }
+}
+
+void EnergyLogger::trimThingPower(const ThingId &thingId, SampleRate sampleRate, const QDateTime &beforeTime)
+{
+    QSqlQuery query(m_db);
+    query.prepare("DELETE FROM thingPower WHERE thingId = ? AND sampleRate = ? AND timestamp < ?;");
+    query.addBindValue(thingId);
+    query.addBindValue(sampleRate);
+    query.addBindValue(beforeTime.toMSecsSinceEpoch());
+    query.exec();
+    if (query.numRowsAffected() > 0) {
+        qCDebug(dcEnergyExperience()).nospace() << "Trimmed " << query.numRowsAffected() << " from thing power series for: " << thingId << sampleRate << " (Older than: " << beforeTime.toString() << ")";
+    }
+}

plugin/energylogger.h

@@ -0,0 +1,68 @@
+#ifndef ENERGYLOGGER_H
+#define ENERGYLOGGER_H
+
+#include "energylogs.h"
+
+#include <typeutils.h>
+
+#include <QObject>
+#include <QDateTime>
+#include <QSqlDatabase>
+#include <QTimer>
+#include <QMap>
+
+class EnergyLogger : public EnergyLogs
+{
+    Q_OBJECT
+public:
+    explicit EnergyLogger(QObject *parent = nullptr);
+
+    void logPowerBalance(double consumption, double production, double acquisition, double storage);
+    void logThingPower(const ThingId &thingId, double currentPower, double totalConsumption, double totalProduction);
+
+    PowerBalanceLogEntries powerBalanceLogs(SampleRate sampleRate, const QDateTime &from = QDateTime(), const QDateTime &to = QDateTime()) const override;
+    ThingPowerLogEntries thingPowerLogs(SampleRate sampleRate, const QList<ThingId> &thingIds, const QDateTime &from = QDateTime(), const QDateTime &to = QDateTime()) const override;
+
+private slots:
+    void sample();
+
+private:
+    bool initDB();
+    void addConfig(SampleRate sampleRate, SampleRate baseSampleRate, int maxSamples);
+    QDateTime getOldestPowerBalanceSampleTimestamp(SampleRate sampleRate);
+    QDateTime getNewestPowerBalanceSampleTimestamp(SampleRate sampleRate);
+    QDateTime getOldestThingPowerSampleTimestamp(const ThingId &thingId, SampleRate sampleRate);
+    QDateTime getNewestThingPowerSampleTimestamp(const ThingId &thingId, SampleRate sampleRate);
+
+    QDateTime nextSampleTimestamp(SampleRate sampleRate, const QDateTime &dateTime);
+    void scheduleNextSample(SampleRate sampleRate);
+
+    void rectifySamples(SampleRate sampleRate, EnergyLogger::SampleRate baseSampleRate);
+
+    bool samplePowerBalance(SampleRate sampleRate, SampleRate baseSampleRate, const QDateTime &sampleEnd);
+    bool insertPowerBalance(const QDateTime &timestamp, SampleRate sampleRate, double consumption, double production, double acquisition, double storage);
+    bool sampleThingsPower(SampleRate sampleRate, SampleRate baseSampleRate, const QDateTime &sampleEnd);
+    bool sampleThingPower(const ThingId &thingId, SampleRate sampleRate, SampleRate baseSampleRate, const QDateTime &sampleEnd);
+    bool insertThingPower(const QDateTime &timestamp, SampleRate sampleRate, const ThingId &thingId, double currentPower, double totalConsumption, double totalProduction);
+    void trimPowerBalance(SampleRate sampleRate, const QDateTime &beforeTime);
+    void trimThingPower(const ThingId &thingId, SampleRate sampleRate, const QDateTime &beforeTime);
+
+private:
+    struct SampleConfig {
+        SampleRate baseSampleRate;
+        int maxSamples = 0;
+    };
+
+    PowerBalanceLogEntries m_balanceLiveLog;
+    QHash<ThingId, ThingPowerLogEntries> m_thingsPowerLiveLogs;
+
+    QTimer m_sampleTimer;
+    QHash<SampleRate, QDateTime> m_nextSamples;
+
+    QSqlDatabase m_db;
+
+    int m_maxMinuteSamples = 0;
+    QMap<SampleRate, SampleConfig> m_configs;
+};
+
+#endif // ENERGYLOGGER_H

plugin/energymanagerimpl.cpp

@@ -1,5 +1,7 @@
 #include "energymanagerimpl.h"
-#include "nymeasettings.h"
+#include "energylogger.h"
+
+#include <nymeasettings.h>
 
 #include <qmath.h>
 
@@ -7,7 +9,8 @@ Q_DECLARE_LOGGING_CATEGORY(dcEnergyExperience)
 
 EnergyManagerImpl::EnergyManagerImpl(ThingManager *thingManager, QObject *parent):
     EnergyManager(parent),
-    m_thingManager(thingManager)
+    m_thingManager(thingManager),
+    m_logger(new EnergyLogger(this))
 {
     // Most of the time we get a bunch of signals at the same time (root meter, producers, consumers etc)
     // In order to decrease some load on the system, we'll wait for wee bit until we actually update to
@@ -67,6 +70,16 @@ double EnergyManagerImpl::currentPowerAcquisition() const
     return m_currentPowerAcquisition;
 }
 
+double EnergyManagerImpl::currentPowerStorage() const
+{
+    return m_currentPowerStorage;
+}
+
+EnergyLogs *EnergyManagerImpl::logs() const
+{
+    return m_logger;
+}
+
 void EnergyManagerImpl::watchThing(Thing *thing)
 {
     // If we don't have a root meter yet, we'll be auto-setting the first energymeter that appears.
@@ -76,8 +89,10 @@ void EnergyManagerImpl::watchThing(Thing *thing)
     }
 
     qCDebug(dcEnergyExperience()) << "Wathing thing:" << thing->name();
-    if (thing->thingClass().interfaces().contains("smartmeterproducer")
-            || thing->thingClass().interfaces().contains("energymeter")
+
+    // React on things that requie us updating the power balance
+    if (thing->thingClass().interfaces().contains("energymeter")
+            || thing->thingClass().interfaces().contains("smartmeterproducer")
             || thing->thingClass().interfaces().contains("energystorage")) {
         connect(thing, &Thing::stateValueChanged, this, [=](const StateTypeId &stateTypeId){
             if (thing->thingClass().getStateType(stateTypeId).name() == "currentPower") {
@@ -85,6 +100,18 @@ void EnergyManagerImpl::watchThing(Thing *thing)
             }
         });
     }
+
+    // React on things that need to be logged
+    if (thing->thingClass().interfaces().contains("energymeter")
+            || thing->thingClass().interfaces().contains("smartmeterconsumer")
+            || thing->thingClass().interfaces().contains("smartmeterproducer")
+            || thing->thingClass().interfaces().contains("energystorage")) {
+        connect(thing, &Thing::stateValueChanged, this, [=](const StateTypeId &stateTypeId, const QVariant &value){
+            if (thing->thingClass().getStateType(stateTypeId).name() == "currentPower") {                
+                m_logger->logThingPower(thing->id(), value.toDouble(), thing->state("totalEnergyConsumed").value().toDouble(), thing->state("totalEnergyProduced").value().toDouble());
+            }
+        });
+    }
 }
 
 void EnergyManagerImpl::unwatchThing(const ThingId &thingId)
@@ -107,21 +134,25 @@ void EnergyManagerImpl::updatePowerBalance()
         currentPowerProduction += thing->stateValue("currentPower").toDouble();
     }
 
-    double currentBatteryBalance = 0;
+    double currentPowerStorage = 0;
     foreach (Thing *thing, m_thingManager->configuredThings().filterByInterface("energystorage")) {
-        currentBatteryBalance += thing->stateValue("currentPower").toDouble();
+        currentPowerStorage += thing->stateValue("currentPower").toDouble();
     }
 
-    double currentPowerConsumption = -currentPowerProduction + currentPowerAcquisition - currentBatteryBalance;
+    double currentPowerConsumption = -currentPowerProduction + currentPowerAcquisition - currentPowerStorage;
 
-    qCDebug(dcEnergyExperience()) << "Consumption:" << currentPowerConsumption << "Production:" << currentPowerProduction << "Acquisition:" << currentPowerAcquisition << "Battery:" << currentBatteryBalance;
+
+    qCDebug(dcEnergyExperience()) << "Consumption:" << currentPowerConsumption << "Production:" << currentPowerProduction << "Acquisition:" << currentPowerAcquisition << "Storage:" << currentPowerStorage;
     if (currentPowerAcquisition != m_currentPowerAcquisition
             || currentPowerConsumption != m_currentPowerConsumption
-            || currentPowerProduction != m_currentPowerProduction) {
+            || currentPowerProduction != m_currentPowerProduction
+            || currentPowerStorage != m_currentPowerStorage) {
         m_currentPowerAcquisition = currentPowerAcquisition;
         m_currentPowerProduction = currentPowerProduction;
         m_currentPowerConsumption = currentPowerConsumption;
+        m_currentPowerStorage = currentPowerStorage;
         emit powerBalanceChanged();
+        m_logger->logPowerBalance(m_currentPowerConsumption, m_currentPowerProduction, m_currentPowerAcquisition, m_currentPowerStorage);
     }
 }
 

plugin/energymanagerimpl.h

@@ -9,6 +9,8 @@
 
 #include "energymanager.h"
 
+class EnergyLogger;
+
 class EnergyManagerImpl : public EnergyManager
 {
     Q_OBJECT
@@ -21,6 +23,9 @@ public:
     double currentPowerConsumption() const override;
     double currentPowerProduction() const override;
     double currentPowerAcquisition() const override;
+    double currentPowerStorage() const override;
+
+    EnergyLogs* logs() const override;
 
 private:
     void watchThing(Thing *thing);
@@ -40,6 +45,9 @@ private:
     double m_currentPowerConsumption;
     double m_currentPowerProduction;
     double m_currentPowerAcquisition;
+    double m_currentPowerStorage;
+
+    EnergyLogger *m_logger = nullptr;
 };
 
 #endif // ENERGYMANAGERIMPL_H

plugin/plugin.pro

@@ -5,7 +5,7 @@ CONFIG += plugin link_pkgconfig c++11
 PKGCONFIG += nymea
 
 QT -= gui
-QT += network
+QT += network sql
 
 include(../config.pri)
 
@@ -14,10 +14,12 @@ LIBS += -L$$top_builddir/libnymea-energy -lnymea-energy
 
 HEADERS += experiencepluginenergy.h \
     energyjsonhandler.h \
+    energylogger.h \
     energymanagerimpl.h
 
 SOURCES += experiencepluginenergy.cpp \
     energyjsonhandler.cpp \
+    energylogger.cpp \
     energymanagerimpl.cpp
 
 target.path = $$[QT_INSTALL_LIBS]/nymea/experiences/