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module mysortfilterproxymodel;


import qt.core.QDate;
import qt.core.QVariant;
import qt.core.QDateTime;
import qt.gui.QSortFilterProxyModel;


class MySortFilterProxyModel : public QSortFilterProxyModel
{
public:

	this(QObject parent = null)
	{
		super(parent);
		minDate = new QDate();
		maxDate = new QDate();
	}

	QDate filterMinimumDate()
	{
		return minDate;
	}
	
	void setFilterMinimumDate(QDate date)
	{
		minDate = date;
		invalidateFilter();
	}

	QDate filterMaximumDate()
	{
		return maxDate;
	}
	
	void setFilterMaximumDate(QDate date)
	{
		maxDate = date;
		invalidateFilter();
	}

protected:

	override bool filterAcceptsRow(int sourceRow, const QModelIndex sourceParent)
	{
		QModelIndex index0 = sourceModel().index(sourceRow, 0, sourceParent);
		QModelIndex index1 = sourceModel().index(sourceRow, 1, sourceParent);
		QModelIndex index2 = sourceModel().index(sourceRow, 2, sourceParent);

		static bool contains(string str, QRegExp rx1)
		{
			auto rx2 = new QRegExp(rx1);
			return (rx2.indexIn(str, 0) != -1);
		}
		
		return (contains(sourceModel().data(index0).toString(), filterRegExp())
			|| contains(sourceModel().data(index1).toString(), filterRegExp()))
			&& dateInRange(sourceModel().data(index2).toDate());
	}

	override bool lessThan(const QModelIndex left, const QModelIndex right)
	{
		QVariant leftData = sourceModel().data(left);
		QVariant rightData = sourceModel().data(right);

		if (leftData.type() == QVariant.Type.DateTime) {
			return leftData.toDateTime() < rightData.toDateTime();
		} else {
			QRegExp emailPattern = new QRegExp("([\\w\\.]*@[\\w\\.]*)");

			string leftString = leftData.toString();
			if(left.column() == 1 && emailPattern.indexIn(leftString) != -1)
				leftString = emailPattern.cap(1);

			string rightString = rightData.toString();
			if(right.column() == 1 && emailPattern.indexIn(rightString) != -1)
				rightString = emailPattern.cap(1);

			return leftString < rightString;
		}
	}

private:

	bool dateInRange(QDate date)
	{
		return (!minDate.isValid() || date > minDate) && (!maxDate.isValid() || date < maxDate);
	}

	QDate minDate;
	QDate maxDate;
}