some tuning, specializations, basic testing

database.cpp

@@ -82,9 +82,29 @@ void DataBase::open()
     }
 }
 
+bool DataBase::removeDirectory()
+{
+    if (opened) {
+        throw Opened(name, "");
+    }
+    QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
+    path += "/" + getName();
+    QDir cache(path);
+
+    if (cache.exists()) {
+        return cache.removeRecursively();
+    } else {
+        return true;
+    }
+}
+
 QString DataBase::getName() const
 {
     return QString::fromStdString(name);
 }
 
+bool DataBase::ready() const
+{
+    return opened;
+}