CourseWork/University/UniversityDatabaseImplement/Implements/StudentStorage.cs

119 lines
3.5 KiB
C#

using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UniversityContracts.BindingModels;
using UniversityContracts.SearchModels;
using UniversityContracts.StorageContracts;
using UniversityContracts.ViewModels;
using UniversityDatabaseImplement.Models;
using static Microsoft.EntityFrameworkCore.DbLoggerCategory;
namespace UniversityDatabaseImplement.Implements
{
public class StudentStorage : IStudentStorage
{
public List<StudentViewModel> GetFullList()
{
using var context = new UniversityDatabase();
return context.Students.Select(x => x.GetViewModel).ToList();
}
public List<StudentViewModel> GetFilteredList(StudentSearchModel model)
{
if (model == null)
{
return new List<StudentViewModel>();
}
using var context = new UniversityDatabase();
// Начальный запрос без фильтрации
var query = context.Students
.Include(x => x.User)
.Include(x => x.PlanOfStudy)
.AsQueryable();
// Если в модели поиска указан Id, добавляем условие фильтрации
if (model.Id.HasValue)
{
query = query.Where(x => x.Id == model.Id.Value);
}
// Выполняем запрос и получаем результаты
var results = query
.Select(x => x.GetViewModel)
.ToList();
return results;
}
public StudentViewModel? GetElement(StudentSearchModel model)
{
if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue)
{
return null;
}
using var context = new UniversityDatabase();
return context.Students.FirstOrDefault(x => (!string.IsNullOrEmpty(model.Name)
&& x.Name == model.Name) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
}
public StudentViewModel? Insert(StudentBindingModel model)
{
using var context = new UniversityDatabase();
var newStudent = Student.Create(context, model);
if (newStudent == null)
{
return null;
}
context.Students.Add(newStudent);
context.SaveChanges();
return newStudent.GetViewModel;
}
public StudentViewModel? Update(StudentBindingModel model)
{
using var context = new UniversityDatabase();
var student = context.Students.FirstOrDefault(x => x.Id == model.Id);
if (student == null)
{
return null;
}
student.Update(model);
context.SaveChanges();
return student.GetViewModel;
}
public StudentViewModel? Delete(StudentBindingModel model)
{
using var context = new UniversityDatabase();
var element = context.Students.FirstOrDefault(rec => rec.Id == model.Id);
if (element != null)
{
context.Students.Remove(element);
context.SaveChanges();
return element.GetViewModel;
}
return null;
}
}
}