using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RecipeEditorLib.RecipeModel.Params
{
    public class StringParam : Param
    {
        public override bool UndoChanges()
        {
            Value = OldValue;
            IsSaved = true;
            return true;
        }

        private string _oldValue;

        public string OldValue
        {
            get { return _oldValue; }
            set
            {
                _oldValue = value;
                this.NotifyOfPropertyChange("OldValue");
            }
        }

        private string _value;
        public string Value
        {
            get { return this._value; }
            set
            {
                this._value = value;
                if (IsSaved)
                {
                    OldValue = value;
                }
                if (this.Feedback != null)
                    this.Feedback(this);
                this.NotifyOfPropertyChange("Value");
            }
        }

        public override void SetValue(string value)
        {
            IsSaved = false;
            this.Value = value;
        }
    }
}