PIbd-23_Abazov_A.A._ConstructionCompany/ConstructionCompany/ConstructionCompanyPsqlImplement/Implements/OrderStorage.cs

using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.SearchModels;
using ConstructionCompanyContracts.StorageContracts;
using ConstructionCompanyContracts.ViewModels;
using ConstructionCompanyPsqlImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConstructionCompanyPsqlImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        private readonly ConstructionCompanyDatabase _source;
        public OrderStorage()
        {
            _source = ConstructionCompanyDatabase.GetInstance();
        }
        public List<OrderViewModel> GetFullList()
        {
            List<OrderViewModel> result = new List<OrderViewModel>();
            foreach (var material in _source.Orders)
            {
                result.Add(material.GetViewModel);
            }
            return result;
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            if (model == null || !model.Id.HasValue)
            {
                return new();
            }
            List<OrderViewModel> result = new List<OrderViewModel>();
            foreach (var material in _source.Orders)
            {
                if (material.Id == model.Id) result.Add(material.GetViewModel);
            }
            return result;
        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (model == null || !model.Id.HasValue)
            {
                return new();
            }
            return _source.Orders.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            var command = Order.CreateCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            _source.ExecuteSql(command);
            var newOrder = _source.Orders[_source.Orders.Count - 1];
            return newOrder.GetViewModel;
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            var command = Order.UpdateCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            _source.ExecuteSql(command);
            var updatedOrder = _source.Orders.First(x => x.Id == model.Id);
            return updatedOrder.GetViewModel;
        }

        public OrderViewModel? Delete(OrderBindingModel model)
        {
            var command = Order.DeleteCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            var deletedOrder = _source.Orders.First(x => x.Id == model.Id).GetViewModel;
            _source.ExecuteSql(command);
            return deletedOrder;
        }
    }
}