diff -r c305d31642ac -r d187ea93fc4f QTfrontend/util/DataManager.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/QTfrontend/util/DataManager.cpp	Thu Apr 26 07:22:05 2012 +0200
@@ -0,0 +1,117 @@
+/*
+ * Hedgewars, a free turn based strategy game
+ * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
+ * Copyright (c) 2007-2012 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+/**
+ * @file
+ * @brief DataManager class implementation
+ */
+
+#include <QMap>
+#include <QStringList>
+
+#include <QFileInfo>
+
+#include "hwconsts.h"
+
+#include "DataManager.h"
+
+
+DataManager::DataManager()
+{
+    userData = new QDir(cfgdir->absolutePath());
+    if (!userData->cd("Data"))
+        userData = NULL;
+
+    defaultData = new QDir(datadir->absolutePath());
+}
+
+
+DataManager & DataManager::instance()
+{
+    static DataManager instance;
+    return instance;
+}
+
+
+QStringList DataManager::entryList(
+    const QString & subDirectory,
+    QDir::Filters filters,
+    const QStringList & nameFilters
+) const
+{
+    QStringList result;
+
+    if (userData != NULL)
+    {
+        QDir tmpDir(*userData);
+        if (tmpDir.cd(subDirectory))
+            result.append(tmpDir.entryList(nameFilters, filters));
+    }
+
+    QDir tmpDir(*defaultData);
+    if (tmpDir.cd(subDirectory))
+        result.append(tmpDir.entryList(nameFilters, filters));
+
+    result.removeDuplicates();
+
+    // sort case-insensitive
+    QMap<QString, QString> sortedFileNames;
+    foreach ( QString fn, result)
+    {
+        sortedFileNames.insert(fn.toLower(), fn);
+    }
+    result = sortedFileNames.values();
+
+    return result;
+}
+
+
+QString DataManager::findFileForRead(
+    const QString & relativeDataFilePath) const
+{
+    QString path;
+
+    if (userData != NULL)
+        path = userData->absolutePath()+"/"+relativeDataFilePath;
+
+    if ((!path.isEmpty()) && (!QFile::exists(path)))
+        path = defaultData->absolutePath()+"/"+relativeDataFilePath;
+
+    return path;
+}
+
+
+QString DataManager::findFileForWrite(
+    const QString & relativeDataFilePath) const
+{
+    if (userData != NULL)
+    {
+        QString path = userData->absolutePath()+"/"+relativeDataFilePath;
+
+        // create folders if needed
+        QDir tmp;
+        tmp.mkpath(QFileInfo(path).absolutePath());
+
+        return path;
+    }
+
+
+    return "";
+}
+