//    CANAPE Network Testing Tool
//    Copyright (C) 2014 Context Information Security
//
//    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, either version 3 of the License, or
//    (at your option) any later version.
//
//    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, see <http://www.gnu.org/licenses/>.

using System;
using System.Text.RegularExpressions;
using CANAPE.DataFrames.Filters;

namespace CANAPE.NodeFactories
{
    /// <summary>
    /// Factory for regular expression dataframe filters
    /// </summary>
    [Serializable]
    public class RegexDataFrameFilterFactory : StringDataFrameFilterFactory
    {
        /// <summary>
        /// Method to create filter
        /// </summary>
        /// <returns></returns>
        protected override SetDataFrameFilter OnCreateSetFilter()
        {
            RegexOptions opts = RegexOptions.Singleline | RegexOptions.CultureInvariant;

            if (!CaseSensitive)
            {
                opts |= RegexOptions.IgnoreCase;
            }

            Regex re = new Regex(Match, opts);

            return new RegexDataFrameFilter(re, GetEncodingFromType(StringEncoding));
        }

        /// <summary>
        /// Method to verify the match string contains valid data
        /// </summary>
        /// <param name="match"></param>
        protected override void VerifyMatch(string match)
        {
            // Try and compile the match
            new Regex(match);
        }
    }
}
