API_SQLuedo/API_SQLuedo/Shared/LessonDataService.cs

using DbContextLib;
using Entities;
using Microsoft.EntityFrameworkCore;
using Dto;
using Model.OrderCriteria;
using Shared.Mapper;

namespace Shared;

public class LessonDataService : ILessonDataService
{
    private UserDbContext DbContext { get; set; }
    public LessonDataService(UserDbContext context)
    {
        DbContext = context;
        context.Database.EnsureCreated();
    }
    public IEnumerable<LessonDTO> GetLessons(int page, int number, LessonOrderCriteria orderCriteria)
    {
        IQueryable<LessonEntity> query = DbContext.Lessons.Skip((page - 1) * number).Take(number);
        switch (orderCriteria)
        {
            case LessonOrderCriteria.None:
                break;
            case LessonOrderCriteria.ByTitle:
                query = query.OrderBy(s => s.Title);
                break;
            case LessonOrderCriteria.ByLastPublisher:
                query = query.OrderBy(s => s.LastPublisher);
                break;
            case LessonOrderCriteria.ByLastEdit:
                query = query.OrderBy(s => s.LastEdit);
                break;
            default:
                break;
        }
        var lessons = query.ToList();
        return lessons.Select(s => s.FromEntityToDTO());
    }

    public LessonDTO GetLessonById(int id)
    {
        var lessonEntity = DbContext.Lessons.FirstOrDefault(u => u.Id == id);
        if (lessonEntity == null)
        {
            throw new ArgumentException("Impossible de trouver la leçon", nameof(id));
        }

        return lessonEntity.FromEntityToDTO();
    }

    public LessonDTO GetLessonByTitle(string title)
    {
        var lessonEntity = DbContext.Lessons.FirstOrDefault(u => u.Title == title);
        if (lessonEntity == null)
        {
            throw new ArgumentException("Impossible de trouver la leçon", nameof(title));
        }

        return lessonEntity.FromEntityToDTO();
    }

    public bool DeleteLesson(int id)
    {
        var lessonEntity = DbContext.Lessons.FirstOrDefault(l => l.Id == id);
        if (lessonEntity == null)
        {
            return false;
        }

        DbContext.Lessons.Remove(lessonEntity);
        DbContext.SaveChangesAsync();
        return true;
    }

    public LessonDTO UpdateLesson(int id, LessonDTO lesson)
    {
        var updatingLesson = DbContext.Lessons.FirstOrDefault(l => l.Id == id);
        if (updatingLesson == null)
        {
            throw new ArgumentException("Impossible de trouver la leçon", nameof(id));
        }

        updatingLesson.Title = lesson.Title;
        updatingLesson.LastPublisher = lesson.LastPublisher;
        updatingLesson.LastEdit = lesson.LastEdit;
        DbContext.SaveChangesAsync();
        return updatingLesson.FromEntityToDTO();
    }

    public LessonDTO CreateLesson(string title, string lastPublisher, DateOnly? lastEdit)
    {
        var newLessonEntity = new LessonDTO()
        {
            Title = title,
            LastPublisher = lastPublisher,
            LastEdit = lastEdit,
        };
        DbContext.Lessons.Add(newLessonEntity.FromDTOToEntity());
        DbContext.SaveChangesAsync();
        return newLessonEntity;
    }
}