prs/prs.stores/StockLocationStore.cs

using System.Linq;
using Comal.Classes;
using InABox.Core;
using System;

namespace Comal.Stores
{
    public class StockLocationStore : BaseStore<StockLocation>
    {
        protected override void BeforeSave(StockLocation entity)
        {
            base.BeforeSave(entity);

            // If the Warehouse is not set, use the default one
            if (!entity.Warehouse.IsValid())
            {
                var warehouseid = Provider.Query(
                    new Filter<StockWarehouse>(x => x.Default).IsEqualTo(true),
                    Columns.None<StockWarehouse>().Add(x => x.ID)
                ).Rows.Select(r => r.Get<StockWarehouse, Guid>(c => c.ID)).FirstOrDefault();
                entity.Warehouse.ID = warehouseid;
            }

            // Try to make sure that there is one and one only default location for the warehouse
            var otherdefaults = Provider.Query(
                new Filter<StockLocation>(x => x.ID).IsNotEqualTo(entity.ID).And(x => x.Warehouse.ID).IsEqualTo(entity.Warehouse.ID)
                    .And(x => x.Default)
                    .IsEqualTo(true),
                Columns.None<StockLocation>().Add(x => x.ID, x => x.Default)
            ).Rows.Select(x => x.ToObject<StockLocation>()).ToArray();

            if (!entity.Default)
                if (!otherdefaults.Any())
                    entity.Default = true;

            if (entity.Default)
            {
                entity.Active = true;
                foreach (var otherdefault in otherdefaults)
                    otherdefault.Default = false;
                Provider.Save(otherdefaults);
            }
        }
    }
}