SUBD/Sushi/SushiDatabaseImplement/Implement/EmployeeStorage.cs

using SushiContracts.BindingModels;
using SushiContracts.SearchModels;
using SushiContracts.StorageContracts;
using SushiContracts.ViewModels;
using SushiDatabaseImplement.Models;

namespace SushiDatabaseImplement.Implements
{
    public class EmployeeStorage : IEmployeeStorage
    {
        public List<EmployeeViewModel> GetFullList()
        {
            using var context = new SushiDatabase();
            return context.Employees.Select(x => x.GetViewModel).ToList();
        }

        public List<EmployeeViewModel> GetFilteredList(EmployeeSearchModel model)
        {
            if (string.IsNullOrEmpty(model.EmployeeName))
            {
                return new();
            }
            using var context = new SushiDatabase();
            return context.Employees.Where(x => x.EmployeeName.Contains(model.EmployeeName)).Select(x => x.GetViewModel).ToList();
        }

        public EmployeeViewModel? GetElement(EmployeeSearchModel model)
        {
            if (string.IsNullOrEmpty(model.EmployeeName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new SushiDatabase();
            return context.Employees.FirstOrDefault(x => (!string.IsNullOrEmpty(model.EmployeeName) && x.EmployeeName == model.EmployeeName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public EmployeeViewModel? Insert(EmployeeBindingModel model)
        {
            var newEmployee = Employee.Create(model);
            if (newEmployee == null)
            {
                return null;
            }
            using var context = new SushiDatabase();
            context.Employees.Add(newEmployee);
            context.SaveChanges();
            return newEmployee.GetViewModel;
        }

        public EmployeeViewModel? Update(EmployeeBindingModel model)
        {
            using var context = new SushiDatabase();
            var client = context.Employees.FirstOrDefault(x => x.Id == model.Id);
            if (client == null)
            {
                return null;
            }
            client.Update(model);
            context.SaveChanges();
            return client.GetViewModel;
        }

        public EmployeeViewModel? Delete(EmployeeBindingModel model)
        {
            using var context = new SushiDatabase();
            var element = context.Employees.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Employees.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}