Merge pull request #590 from GriffinRichards/update-promoter

Add update promoter

include/ui/aboutporymap.h

@@ -14,7 +14,6 @@ class AboutPorymap : public QMainWindow
 public:
     explicit AboutPorymap(QWidget *parent = nullptr);
     ~AboutPorymap();
-    QList<int> getVersionNumbers();
 private:
     Ui::AboutPorymap *ui;
 };

include/ui/updatepromoter.h

@@ -0,0 +1,50 @@
+#ifndef UPDATEPROMOTER_H
+#define UPDATEPROMOTER_H
+
+#include "network.h"
+
+#include <QDialog>
+#include <QPushButton>
+#include <QVersionNumber>
+
+namespace Ui {
+class UpdatePromoter;
+}
+
+class UpdatePromoter : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit UpdatePromoter(QWidget *parent, NetworkAccessManager *manager);
+    ~UpdatePromoter() {};
+
+    void checkForUpdates();
+    void updatePreferences();
+
+private:
+    Ui::UpdatePromoter *ui;
+    NetworkAccessManager *const manager;
+    QPushButton * button_Downloads;
+    QPushButton * button_Retry;
+
+    QString changelog;
+    QUrl downloadUrl;
+    QVersionNumber newVersion;
+    bool foundReleases;
+
+    QSet<QUrl> visitedUrls; // Prevent infinite redirection
+
+    void resetDialog();
+    void get(const QUrl &url);
+    void processWebpage(const QJsonDocument &data, const QUrl &nextUrl);
+    void error(const QString &err, const QDateTime time = QDateTime());
+
+private slots:
+    void dialogButtonClicked(QAbstractButton *button);
+
+signals:
+    void changedPreferences();
+};
+
+#endif // UPDATEPROMOTER_H