using System.Linq.Expressions;

namespace CMS.Plugin.HIAWms.Domain.WmsContainers
{
    /// <summary>
    /// WmsContainer规约
    /// </summary>
    public class WmsContainerSpecification : Volo.Abp.Specifications.Specification<WmsContainer>
    {
        private readonly string _containerNo;

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

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

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

            if (_containerNo != null)
            {
                expression = expression.And(c => c.ContainerNo == _containerNo);
            }

            return expression;
        }
    }
}