--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/util.cpp	Tue May 08 13:14:29 2018 +0300
@@ -0,0 +1,111 @@
+//
+// Syntilista - debt list/management database program
+// Programmed and designed by Matti Hämäläinen <ccr@tnsp.org>
+// (C) Copyright 2017-2018 Tecnic Software productions (TNSP)
+//
+// Distributed under 3-clause BSD style license, refer to
+// included file "COPYING" for exact terms.
+//
+#include "main.h"
+#include "util.h"
+#include <QMessageBox>
+
+
+//
+// Convert QString to a double value, replacing comma
+//
+double slMoneyStrToValue(const QString &str)
+{
+    QString str2 = str;
+    return str2.replace(",", ".").toDouble();
+}
+
+
+//
+// Convert double value to formatted QString
+//
+QString slMoneyValueToStr(double val)
+{
+    return QStringLiteral("%1").arg(val, 1, 'f', 2);
+}
+
+
+QString slMoneyValueToStrSign(double val)
+{
+    return QStringLiteral("%1%2").
+        arg(val > 0 ? "+" : "").
+        arg(val, 1, 'f', 2);
+}
+
+
+//
+// Trim and cleanup given QString (removing double whitespace etc.)
+//
+QString slCleanupStr(const QString &str)
+{
+    return str.simplified().trimmed();
+}
+
+
+//
+// Manipulate given QDateTime value to get desired
+// correct timestamp.
+//
+const QDateTime slDateTimeToLocal(const QDateTime &val)
+{
+    QDateTime tmp = val;
+    tmp.setOffsetFromUtc(0);
+    return tmp.toLocalTime();
+}
+
+
+//
+// Return a string representation of given QDateTime
+// converted to local time.
+//
+const QString slDateTimeToStr(const QDateTime &val)
+{
+//    return slDateTimeToLocal(val).toString(QStringLiteral("yyyy-MM-dd hh:mm"));
+    return slDateTimeToLocal(val).toString(QStringLiteral("dd.MM.yyyy hh:mm"));
+}
+
+
+//
+// Error logging
+//
+void slLog(const QString &mtype, const QString &msg)
+{
+    QString filename = settings.dataPath + QDir::separator() + APP_LOG_FILE;
+    QFile fh(filename);
+    if (fh.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text))
+    {
+        QTextStream out(&fh);
+        out <<
+            slDateTimeToLocal(QDateTime::currentDateTimeUtc()).
+            toString(QStringLiteral("yyyy-MM-dd hh:mm:ss"))
+            << " [" << mtype << "]: " << msg << "\n";
+        fh.close();
+    }
+}
+
+
+//
+// Display an error dialog with given title and message
+//
+int slErrorMsg(const QString &title, const QString &msg)
+{
+    QMessageBox dlg;
+
+    slLog("ERROR", msg);
+
+    dlg.setText(title);
+    dlg.setInformativeText(msg);
+    dlg.setTextFormat(Qt::RichText);
+    dlg.setIcon(QMessageBox::Critical);
+    dlg.setStandardButtons(QMessageBox::Ok);
+    dlg.setDefaultButton(QMessageBox::Ok);
+
+    return dlg.exec();
+}
+
+