Add custom roles to the post model and export them to QML

src/model/danboorupostmodel.h

@@ -59,6 +59,17 @@ public:
     int rowCount(const QModelIndex &parent = QModelIndex()) const;
     QVariant data(const QModelIndex &index, int role) const;
     void clear();
+    QHash<int, QByteArray> roleNames() const;
+
+    enum PostRoles {
+        PixmapRole = Qt::UserRole + 1000,
+        FileUrlRole = Qt::UserRole + 1001,
+        ThumbUrlRole = Qt::UserRole + 1002,
+        SizeRole = Qt::UserRole + 1003,
+        RatingRole = Qt::UserRole + 1004,
+        TagRole = Qt::UserRole + 1005,
+        ResolutionRole = Qt::UserRole + 1006
+    };
 
 private:
     QVector<DanbooruPost *> m_items;