iot/projects/IoTNode/RoleService.cs

using Application.Domain.Entities;
using Infrastructure.Data;
using Infrastructure.Web;
using System.Collections.Generic;
using System.Linq;

namespace IoTNode
{
    public class RoleService : IRoleService
    {
        private readonly IRepository<User> _userRepo;

        public RoleService(IRepository<User> userRepo)
        {
            this._userRepo = userRepo;
        }

        public List<string> GetRoles(string userName)
        {
            var userPermissions = this._userRepo.ReadOnlyTable().Where(o => o.UserName == userName)
                                    .SelectMany(o => o.UserRoles)
                                    .Select(o => o.Role)
                                    .SelectMany(o => o.RolePermissions)
                                    .Select(o => o.Permission.Number)
                                    .ToList();
            return userPermissions;
        }
    }
}