cms_thermo_active/Step.Database/Controllers/MachinesUsersController.cs

using Step.Model.DatabaseModels;
using Step.Model.DTOModels;
using System;
using System.Linq;

namespace Step.Database.Controllers
{
    public class MachinesUsersController : IDisposable
    {
        private DatabaseContext dbCtx;

        public MachinesUsersController()
        {
            // Initialize database context
            dbCtx = new DatabaseContext();
        }

        public void Dispose()
        {
            // Clear database context
            dbCtx.Dispose();
        }

        public MachineUserModel FindByUserId(int machineId, int userId)
        {
            return dbCtx
                .MachinesUsers
                .Include("Role") // TODO Add machine and user info?
                .Where(x => x.MachineId == machineId && x.UserId == userId)
                .FirstOrDefault();
        }

        public MachineUserModel FindById(int id)
        {
            return dbCtx
                .MachinesUsers
                .Include("Role") // Join with Role, Machine, User
                .Include("Machine")
                .Include("User")
                .Where(x => x.MachineUserId == id)
                .FirstOrDefault();
        }

        public MachineUserModel Create(int machineId, int userId, int roleId)
        {
            // Create database model
            MachineUserModel machine = new MachineUserModel() {
                MachineId = machineId,
                UserId = userId,
                RoleId = roleId
            };
            // Add into database
            dbCtx.MachinesUsers.Add(
                machine
            );
            // Commit changes
            dbCtx.SaveChanges();

            return machine;
        }

        public DTORoleModel GetUserRole(int machineId, int userId)
        {
            RoleModel role = dbCtx
                .MachinesUsers
                .Include("Role")
                .Where(x => x.MachineId == machineId && x.UserId == userId) // Find by machine id and user id, joining with role
                .FirstOrDefault().Role;

            return new DTORoleModel()
            {
                Id = role.RoleId,
                Name = role.Name
            };
        }
    }
}