CourseWorkElectronicsShop/ElectronicsShop/ElectronicsShopDataBaseImplement/Implements/RoleStorage.cs

using ElectronicsShopContracts.BindingModels;
using ElectronicsShopContracts.SearchModels;
using ElectronicsShopContracts.StorageContracts;
using ElectronicsShopContracts.ViewModels;
using ElectronicsShopDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ElectronicsShopDataBaseImplement.Implements
{
    public class RoleStorage: IRoleStorage
    {
        public RoleViewModel? Delete(RoleBindingModel model)
        {
            using var context = new Database();
            var element = context.Roles.FirstOrDefault(rec => rec.ID == model.ID);
            if (element != null)
            {
                context.Roles.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public RoleViewModel? GetElement(RoleSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name) && !model.ID.HasValue)
            {
                return null;
            }
            using var context = new Database();
            return context.Roles.FirstOrDefault(x =>
            (!string.IsNullOrEmpty(model.Name) && x.Name == model.Name && (model.ID.HasValue && x.ID == model.ID)))?.GetViewModel;
        }

        public List<RoleViewModel> GetFilteredList(RoleSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name))
            {
                return new();
            }
            using var context = new Database();
            return context.Roles.Where(x => x.Name.Contains(model.Name)).Select(x => x.GetViewModel).ToList();
        }

        public List<RoleViewModel> GetFullList()
        {
            using var context = new Database();
            return context.Roles.Select(x => x.GetViewModel).ToList();
        }

        public RoleViewModel? Insert(RoleBindingModel model)
        {
            var newComponent = Role.Create(model);
            if (newComponent == null)
            {
                return null;
            }
            using var context = new Database();
            context.Roles.Add(newComponent);
            context.SaveChanges();
            return newComponent.GetViewModel;
        }

        public RoleViewModel? Update(RoleBindingModel model)
        {
            using var context = new Database();
            var component = context.Roles.FirstOrDefault(x => x.ID == model.ID);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }
    }
}