using System.Linq.Expressions;

namespace CMS.Plugin.HIAWms.Domain.WmsPlaces
{
    /// <summary>
    /// WmsPlace规约
    /// </summary>
    public class WmsPlaceSpecification : Volo.Abp.Specifications.Specification<WmsPlace>
    {
        private readonly string _placeNo;

        /// <summary>
        /// Initializes a new instance of the <see cref="WmsPlaceSpecification"/> class.
        /// </summary>
        public WmsPlaceSpecification()
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="WmsPlaceSpecification"/> class.
        /// </summary>
        /// <param name="placeNo">The name.</param>
        public WmsPlaceSpecification(string placeNo = null)
        {
            _placeNo = placeNo;
        }

        /// <inheritdoc />
        public override Expression<Func<WmsPlace, bool>> ToExpression()
        {
            Expression<Func<WmsPlace, bool>> expression = c => 1 == 1;

            if (_placeNo != null)
            {
                expression = expression.And(c => c.PlaceNo == _placeNo);
            }

            return expression;
        }
    }
}