PIbd-23-Yunusov-N.N.-CarRepairShop/CarRepairShop/CarRepairShopFileImplement/Implements/RepairStorage.cs

using CarRepairShopContracts.BindingModels;
using CarRepairShopContracts.SearchModels;
using CarRepairShopContracts.StoragesContracts;
using CarRepairShopContracts.ViewModels;
using CarRepairShopFileImplement.Models;

namespace CarRepairShopFileImplement.Implements
{
    public class RepairStorage : IRepairStorage
    {
        private readonly DataFileSingleton source;
        public RepairStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public List<RepairViewModel> GetFullList()
        {
            return source.Repairs
            .Select(x => x.GetViewModel)
           .ToList();
        }

        public List<RepairViewModel> GetFilteredList(RepairSearchModel model)
        {
            if (string.IsNullOrEmpty(model.RepairName))
            {
                return new();
            }
            return source.Repairs.Where(x => x.RepairName.Contains(model.RepairName)).Select(x => x.GetViewModel).ToList();
        }

        public RepairViewModel? GetElement(RepairSearchModel model)
        {
            if (string.IsNullOrEmpty(model.RepairName) && !model.Id.HasValue)
            {
                return null;
            }
            return source.Repairs.FirstOrDefault(x =>(!string.IsNullOrEmpty(model.RepairName) && x.RepairName ==model.RepairName) ||(model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public RepairViewModel? Insert(RepairBindingModel model)
        {
            model.Id = source.Repairs.Count > 0 ? source.Repairs.Max(x => x.Id) + 1 : 1;
            var newRepair = Repair.Create(model);
            if (newRepair == null)
            {
                return null;
            }
            source.Repairs.Add(newRepair);
            source.SaveRepairs();
            return newRepair.GetViewModel;
        }

        public RepairViewModel? Update(RepairBindingModel model)
        {
            var repair = source.Repairs.FirstOrDefault(x => x.Id == model.Id);
            if (repair == null)
            {
                return null;
            }
            repair.Update(model);
            source.SaveRepairs();
            return repair.GetViewModel;
        }
        public RepairViewModel? Delete(RepairBindingModel model)
        {
            var repair = source.Repairs.FirstOrDefault(x => x.Id == model.Id);
            if (repair != null)
            {
                source.Repairs.Remove(repair);
                source.SaveRepairs();
                return repair.GetViewModel;
            }
            return null;
        }
    }
}