From ec59ad69d42548fe7e40a3071ac8a77508c8e84f Mon Sep 17 00:00:00 2001
From: Daniel TARTAVEL <dtux@free.fr>
Date: Sat, 18 Oct 2025 17:51:53 +0200
Subject: [PATCH] added save/restore history

---
 pws2mqtt-qt.pro      | 20 ++++++-------
 src/barometertrend.h | 71 ++++++++++++++++++++++++++++++++++++++++++++
 src/main.cpp         |  1 -
 3 files changed, 81 insertions(+), 11 deletions(-)

diff --git a/pws2mqtt-qt.pro b/pws2mqtt-qt.pro
index cb7cc15..5f83235 100644
--- a/pws2mqtt-qt.pro
+++ b/pws2mqtt-qt.pro
@@ -14,10 +14,10 @@ CONFIG -= app_bundle
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
 SOURCES += \
-src/main.cpp \
-src/mqtt.cpp \
-src/pws2mqtt.cpp \
-src/utcicalculator.cpp
+    src/main.cpp \
+    src/mqtt.cpp \
+    src/pws2mqtt.cpp \
+    src/utcicalculator.cpp
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin
@@ -25,10 +25,10 @@ else: unix:!android: target.path = /opt/$${TARGET}/bin
 !isEmpty(target.path): INSTALLS += target
 
 HEADERS += \
-src/barometertrend.h \
-src/httpserver.h \
-src/mqtt.h \
-src/pws2mqtt.h \
-src/utcicalculator.h \
-src/version.h
+    src/barometertrend.h \
+    src/httpserver.h \
+    src/mqtt.h \
+    src/pws2mqtt.h \
+    src/utcicalculator.h \
+    src/version.h
 
diff --git a/src/barometertrend.h b/src/barometertrend.h
index bfe170a..146eced 100644
--- a/src/barometertrend.h
+++ b/src/barometertrend.h
@@ -28,6 +28,10 @@ public:
     {
         m_values.reserve(360 + 16); // évite reallocs fréquentes
         m_timestamps.reserve(360 + 16);
+        restoreHistory();
+        // Sauvegarde automatique toutes les 10 minutes
+        connect(&m_saveTimer, &QTimer::timeout, this, &BarometerTrend::saveHistory);
+        m_saveTimer.start(10 * 60 * 1000);
     }
 
     void addPressure(double pressure_hPa)
@@ -345,4 +349,71 @@ public:
 private:
     QVector<double> m_values;
     QVector<QDateTime> m_timestamps;
+    QTimer m_saveTimer;
+
+private slots:
+    void saveHistory()
+    {
+        QJsonArray array;
+        for (int i = 0; i < m_values.size(); ++i)
+        {
+            QJsonObject obj;
+            obj["timestamp"] = m_timestamps[i].toString(Qt::ISODate);
+            obj["pressure"] = m_values[i];
+            array.append(obj);
+        }
+
+        QJsonDocument doc(array);
+        QFile file("/usr/local/share/pws2mqtt/barometer_history.json");
+        if (file.open(QIODevice::WriteOnly | QIODevice::Truncate))
+        {
+            file.write(doc.toJson());
+            file.close();
+            debug(DEBUGMACRO, "Barometer history saved (" + QByteArray::number(m_values.size()) + " samples)", DEBUG);
+        }else
+        {
+            debug(DEBUGMACRO, "File not open : " + file.errorString() , WARNING);
+        }
+    }
+
+    void restoreHistory()
+    {
+        QFile file("/usr/local/share/pws2mqtt/barometer_history.json");
+        if (!file.exists())
+        {
+            debug(DEBUGMACRO, "File not open : " + file.errorString() , WARNING);
+            return;
+        }
+        if (file.open(QIODevice::ReadOnly))
+        {
+            QByteArray data = file.readAll();
+            file.close();
+
+            QJsonDocument doc = QJsonDocument::fromJson(data);
+            if (!doc.isArray()) return;
+
+            QJsonArray array = doc.array();
+            for (const QJsonValue &val : array)
+            {
+                QJsonObject obj = val.toObject();
+                double pressure = obj["pressure"].toDouble();
+                QDateTime ts = QDateTime::fromString(obj["timestamp"].toString(), Qt::ISODate);
+                if (ts.isValid())
+                {
+                    m_values.append(pressure);
+                    m_timestamps.append(ts);
+                }
+            }
+
+            // On ne garde que les 3 dernières heures
+            QDateTime limit = QDateTime::currentDateTime().addSecs(-3 * 3600);
+            while (!m_timestamps.isEmpty() && m_timestamps.first() < limit)
+            {
+                m_timestamps.removeFirst();
+                m_values.removeFirst();
+            }
+
+            debug(DEBUGMACRO, "Barometer history restored (" + QByteArray::number(m_values.size()) + " samples)", DEBUG);
+        }
+    }
 };
diff --git a/src/main.cpp b/src/main.cpp
index bda905d..482bf70 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -20,7 +20,6 @@
 #include <sys/types.h>
 #include <sys/select.h>
 #include <sys/socket.h>
-#include "utcicalculator.h"
 
 #define CLIENT_ID "Client_ID"
 #define BROKER_ADDRESS "localhost"