PIbd-22_Kamcharova_K.A_RenovationWork/RenovationWorkDatabaseImplement/Implements/ImplementerStorage.cs

using RenovationWorkContracts.BindingModels;
using RenovationWorkContracts.SearchModels;
using RenovationWorkContracts.StoragesContracts;
using RenovationWorkContracts.ViewModels;
using RenovationWorkDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RenovationWorkDatabaseImplement.Implements
{
    public class ImplementerStorage : IImplementerStorage
    {
        public ImplementerViewModel? Delete(ImplementerBindingModel model)
        {
            using var context = new RenovationWorkDatabase();
            var res = context.Implementers.FirstOrDefault(x => x.Id == model.Id);
            if (res != null)
            {
                context.Implementers.Remove(res);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }
        public ImplementerViewModel? GetElement(ImplementerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ImplementerFIO) && string.IsNullOrEmpty(model.Password) &&
               !model.Id.HasValue)
            {
                return null;
            }
            using var context = new RenovationWorkDatabase();
            return context.Implementers
            .FirstOrDefault(x => (string.IsNullOrEmpty(model.ImplementerFIO) || x.ImplementerFIO == model.ImplementerFIO) &&
                                 (!model.Id.HasValue || x.Id == model.Id) &&
                                 (string.IsNullOrEmpty(model.Password) || x.Password == model.Password))
            ?.GetViewModel;
        }
        public List<ImplementerViewModel> GetFilteredList(ImplementerSearchModel model)
        {
            if (model == null)
            {
                return new();
            }
            if (model.Id.HasValue)
            {
                var res = GetElement(model);
                return res != null ? new() { res } : new();
            }
            return new();
        }
        public List<ImplementerViewModel> GetFullList()
        {
            using var context = new RenovationWorkDatabase();
            return context.Implementers.Select(x => x.GetViewModel).ToList();
        }
        public ImplementerViewModel? Insert(ImplementerBindingModel model)
        {
            using var context = new RenovationWorkDatabase();
            var res = Implementer.Create(model);
            if (res != null)
            {
                context.Implementers.Add(res);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }
        public ImplementerViewModel? Update(ImplementerBindingModel model)
        {
            using var context = new RenovationWorkDatabase();
            var res = context.Implementers.FirstOrDefault(x => x.Id == model.Id);
            if (res != null)
            {
                res.Update(model);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }
    }
}