JWLMerge/JWLMerge.BackupFileServices/Helpers/IdTranslator.cs

namespace JWLMerge.BackupFileServices.Helpers
{
    using System.Collections.Generic;

    /// <summary>
    /// Used by the <see cref="Merger"/> to map old and new id values./>
    /// </summary>
    internal class IdTranslator
    {
        private readonly Dictionary<int, int> _ids;

        public IdTranslator()
        {
            _ids = new Dictionary<int, int>();
        }

        public int GetTranslatedId(int oldId)
        {
            return _ids.TryGetValue(oldId, out var translatedId) ? translatedId : 0;
        }

        public void Add(int oldId, int translatedId)
        {
            _ids[oldId] = translatedId;
        }

        public void Clear()
        {
            _ids.Clear();
        }
    }
}