Complete oil change logic and connect up to vehicle page.

src/contents/ui/main.qml

@@ -262,6 +262,7 @@ Kirigami.ApplicationWindow {
                     property var serviceId: Kirigami.PageRouter.data.id
                     Component.onCompleted: {
                         recordModel.changeVehicleFilter(serviceId);
+                        dbAnalytics.checkOilChangeNeededForVehicle(serviceId);
                     }
                     id: serviceRecordPage
                     title: qsTr("Service Records for ") + Kirigami.PageRouter.data.name
@@ -286,8 +287,12 @@ Kirigami.ApplicationWindow {
                                         type: Kirigami.MessageType.Information
                                         id: oilMessage
                                         showCloseButton: false
-                                        Component.onCompleted: {
+                                        text: qsTr("You are due for an oil change!")
-                                            //TODO: check if oil change is needed.
+                                        Connections {
+                                            target: dbAnalytics
+                                            onIsOilChangeNeeded: {
+                                                oilMessage.visible = changeNeeded;
+                                            }
                                         }
                                     }
                                 }

src/db/recordanalytics.cpp

@@ -28,13 +28,29 @@ RecordAnalytics::RecordAnalytics(QObject* parent, QSqlDatabase db) : _db(db)
 void RecordAnalytics::checkOilChangeNeededForVehicle(int vehicleId, int milesForChange, int monthsForChange)
 {
     QtConcurrent::run([&](){
-        QSqlQuery query = _db.exec("SELECT * FROM records WHERE records.servicetype = 0;");
+        QSqlQuery query = _db.exec("SELECT * FROM records WHERE records.vehicle = "+QString::number(vehicleId));
         int milesRecord = query.record().indexOf("miles");
         int dateRecord = query.record().indexOf("servicedate");
+        int typeRecord = query.record().indexOf("servicetype");
+        QDateTime lastOilDate;
+        int lastOilMiles = 0;
+        int lastKnownMiles = 0;
         while(query.next()) {
-            //TODO: query.value(milesRecord);
+            if(query.value(typeRecord).toInt() == 0) {
+                if(!lastOilDate.isValid() || lastOilDate < QDateTime::fromString(query.value(dateRecord).toString(), Qt::DateFormat::ISODate)) {
+                    lastOilDate = QDateTime::fromString(query.value(dateRecord).toString(), Qt::DateFormat::ISODate);
+                    lastOilMiles = query.value(milesRecord).toInt();
+                }
+            }
+            if(lastKnownMiles < query.value(milesRecord).toInt()) {
+                lastKnownMiles = query.value(milesRecord).toInt();
+            }
+        }
+        if(lastKnownMiles-lastOilMiles > milesForChange || lastOilMiles == 0 || !lastOilDate.isValid() || lastOilDate.daysTo(QDateTime::currentDateTime()) > 30*monthsForChange) {
+            emit this->isOilChangeNeeded(true);
+        } else {
+            emit this->isOilChangeNeeded(false);
         }
-        emit this->isOilChangeNeeded(false);
     });
 }
 

src/main.cpp

@@ -32,6 +32,7 @@
 #include "db/sqlvehicle.h"
 #include "db/sqlservicerecord.h"
 #include "jsonio.h"
+#include "db/recordanalytics.h"
 
 Q_DECL_EXPORT int main(int argc, char *argv[])
 {
@@ -95,12 +96,14 @@ Q_DECL_EXPORT int main(int argc, char *argv[])
     vehicles.select();
     records.select();
     JsonIO converter(&vehicles, &records);
+    RecordAnalytics analytics(nullptr, db);
     
     QQmlApplicationEngine engine;
     engine.rootContext()->setContextProperty(QStringLiteral("appAboutData"), QVariant::fromValue(aboutData));
     engine.rootContext()->setContextProperty(QStringLiteral("vehicleModel"), &vehicles);
     engine.rootContext()->setContextProperty(QStringLiteral("recordModel"), &records);
     engine.rootContext()->setContextProperty(QStringLiteral("jsonConverter"), &converter);
+    engine.rootContext()->setContextProperty(QStringLiteral("dbAnalytics"), &analytics);
     engine.load(QUrl(QStringLiteral("qrc:///main.qml")));
     
     if (engine.rootObjects().isEmpty()) {