mmorales.photo/back/context/UserContext.cs

using back.DataModels;
using Microsoft.EntityFrameworkCore;

namespace back.context;

public class UserContext : DbContext
{
    public DbSet<UserModel> Users { get; set; }
    public UserContext(DbContextOptions<UserContext> options) : base(options)
    {
        // Ensure database is created
        Database.EnsureCreated();
    }

    public async Task<UserModel?> GetById(Guid id)
    {
        return await Users.FindAsync(id);
    }

    public async Task<int> GetTotalItems()
    {
        return await Users.CountAsync();
    }

    public async Task<IEnumerable<UserModel>> GetPage(int page = 1, int pageSize = 20)
    {
        if (page < 1) page = 1;
        if (pageSize < 1) pageSize = 20;

        return await Users
            .OrderByDescending(p => p.CreatedAt)
            .Skip((page - 1) * pageSize)
            .Take(pageSize)
            .ToListAsync();
    }

    public async Task<bool> Exists(UserModel? photo)
    {
        if (photo == null) return false;
        if (string.IsNullOrEmpty(photo.Id)) return false;
        return await Users.AnyAsync(p => p.Id == photo.Id);
    }

    public async Task<bool> Exists(string id)
    {
        return await Users.AnyAsync(p => p.Id == id);
    }
}