Use QSettings instead of QSqlDatabase, move defaults to headers.

This is what over thinking looks like. QSettings need *absolutely no configuration*, whereas QSqlDatabase couldn't even get the directory created, and for some reason (simple write permissions, I think) QDir couldn't even create the data folder. Gah!

src/battery.cpp

@@ -22,14 +22,11 @@ Battery::Battery(QObject* parent) : QObject(parent)
     chargeFile = new QFile("/run/state/namespaces/Battery/ChargePercentage"); // Number, meaning percentage, e.g. 42
     chargingFile = new QFile("/run/state/namespaces/Battery/IsCharging"); // Number, 0 or 1
 
-    // Default values...
-    currentCharge = 100;
-    isCharging = true;
+    // TODO
+    // What if the files can't be opened?
+    // What if the device doesn't have a battery?
 
-    nextCharge = currentCharge;
-    nextCharging = isCharging;
-
-    this->updateData();
+    updateData();
 }
 
 Battery::~Battery() { }

src/battery.h

@@ -42,11 +42,12 @@ private:
     QFile* chargeFile;
     QFile* chargingFile;
 
-    int currentCharge;
-    bool isCharging;
+    // Default values
+    int currentCharge = 100;
+    bool isCharging = true;
 
-    int nextCharge;
-    bool nextCharging;
+    int nextCharge = 100;
+    bool nextCharging = true;
 
 signals:
     int chargeChanged();

src/settings.cpp

@@ -17,66 +17,31 @@
  */
 #include "settings.h"
 
-Settings::Settings(QObject *parent) : QObject(parent)
-{
-    // Defaults
-    lowerLimit = 25;
-    upperLimit = 75;
-
-    // Just to be sure...
-    QDir datadir = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
-    if(!datadir.exists())
-        datadir.mkdir(QStandardPaths::writableLocation(QStandardPaths::DataLocation));
-
-    // Use Sailfish-provided sounds
-    lowAlertFile = "/usr/share/sounds/jolla-ambient/stereo/general_warning.wav";
-    highAlertFile = "/usr/share/sounds/jolla-ambient/stereo/positive_confirmation.wav";
+Settings::Settings(QObject *parent) : QObject(parent) { load(); }
 
 Settings::~Settings() { save(); }
 
 void Settings::load()
 {
-    QDir::setCurrent(QStandardPaths::writableLocation(QStandardPaths::DataLocation));
-    QFile file;
-
-    file.setFileName("lowerLimit");
-    if(file.exists() && file.open(QIODevice::ReadOnly)) {
-        int nextLimit = file.readAll().toInt();
-        if(nextLimit >= 10 && nextLimit <= 50) {
-            lowerLimit = nextLimit;
-            emit lowerLimitChanged();
-        }
-        file.close();
+    QSettings mySettings;
+    int tempValue;
+    if(mySettings.contains("lowerLimit")) {
+        tempValue = mySettings.value("lowerLimit").toInt();
+        if(tempValue <= 10 && tempValue >= 99)
+            lowerLimit = tempValue;
     }
-    file.setFileName("upperLimit");
-    if(file.exists() && file.open(QIODevice::ReadOnly)) {
-        int nextLimit = file.readAll().toInt();
-        if(nextLimit >= 60 && nextLimit <= 99) {
-            upperLimit = nextLimit;
-            emit upperLimitChanged();
-        }
-        file.close();
+    if(mySettings.contains("upperLimit")) {
+        tempValue = mySettings.value("upperLimit").toInt();
+        if(tempValue <= 60 && tempValue >= 99)
+            upperLimit = tempValue;
     }
 }
 
 void Settings::save()
 {
-    QDir::setCurrent(QStandardPaths::writableLocation(QStandardPaths::DataLocation));
-    QFile file;
-
-    file.setFileName("lowerLimit");
-    if(file.open(QIODevice::WriteOnly)) {
-        if(file.write(QString("%1").arg(lowerLimit).toUtf8())) {
-        }
-        file.close();
-    }
-
-    file.setFileName("upperLimit");
-    if(file.open(QIODevice::WriteOnly)) {
-        if(file.write(QString("%1").arg(upperLimit).toUtf8())) {
-        }
-        file.close();
-    }
+    QSettings mySettings;
+    mySettings.setValue("lowerLimit", QByteArray::number(lowerLimit));
+    mySettings.setValue("upperLimit", QByteArray::number(upperLimit));
 }
 
 int Settings::getLowerLimit() { return lowerLimit; }

src/settings.h

@@ -19,9 +19,7 @@
 #define SETTINGS_H
 
 #include <QObject>
-#include <QFile>
-#include <QDir>
-#include <QStandardPaths>
+#include <QSettings>
 
 class Settings : public QObject
 {
@@ -44,10 +42,11 @@ public:
     void setUpperLimit(int newLimit);
 
 private:
-    int lowerLimit;
-    int upperLimit;
-    QString lowAlertFile;
-    QString highAlertFile;
+    // Default values
+    int lowerLimit = 25;
+    int upperLimit = 75;
+    QString lowAlertFile = "/usr/share/sounds/jolla-ambient/stereo/general_warning.wav";
+    QString highAlertFile = "/usr/share/sounds/jolla-ambient/stereo/positive_confirmation.wav";
 
     void load();
     void save();