CourseWork_Bank/Bank/BankDatabaseImplement/Implements/BankOperatorStorage.cs

using BankContracts.BindingModels;
using BankContracts.SearchModels;
using BankContracts.StoragesContracts;
using BankContracts.ViewModels;
using BankDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BankDatabaseImplement.Implements
{
    public class BankOperatorStorage : IBankOperatorStorage
    {
        public BankOperatorViewModel? Delete(BankOperatorBindingModel model)
        {
            using var context = new BankDatabase();
            var element = context.BankOperators.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.BankOperators.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public BankOperatorViewModel? GetElement(BankOperatorSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new BankDatabase();
            return context.BankOperators
            .FirstOrDefault(x => x.Id == model.Id)
            ?.GetViewModel;
        }

        public List<BankOperatorViewModel> GetFilteredList(BankOperatorSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return new();
            }
            using var context = new BankDatabase();
            return context.BankOperators
            .Where(x => x.Id == model.Id)
            .Select(x => x.GetViewModel)
            .ToList();
        }

        public List<BankOperatorViewModel> GetFullList()
        {
            using var context = new BankDatabase();
            return context.BankOperators
            .Select(x => x.GetViewModel)
            .ToList();
        }

        public BankOperatorViewModel? Insert(BankOperatorBindingModel model)
        {
            using var context = new BankDatabase();
            var newBankOperator = BankOperator.Create(model);
            if (newBankOperator == null)
            {
                return null;
            }
            context.BankOperators.Add(newBankOperator);
            context.SaveChanges();
            return newBankOperator.GetViewModel;
        }

        public BankOperatorViewModel? Update(BankOperatorBindingModel model)
        {
            using var context = new BankDatabase();
            var bankOperator = context.BankOperators.FirstOrDefault(x => x.Id == model.Id);
            if (bankOperator == null)
            {
                return null;
            }
            bankOperator.Update(model);
            context.SaveChanges();
            return bankOperator.GetViewModel;
        }
    }
}