public async Task <bool> IncrementVotesNumAsync(bool isVoteGood)
        {
            try
            {
                using (var context = new ElectoralDatabase())
                {
                    var vote = context.Votes.Single();

                    if (isVoteGood)
                    {
                        vote.Valid_Votes++;
                    }
                    else
                    {
                        vote.Bad_Votes++;
                    }

                    context.Entry(vote).State = System.Data.Entity.EntityState.Modified;

                    await context.SaveChangesAsync();

                    return(true);
                }
            }
            catch
            {
                return(false);
            }
        }
        public async Task <bool> UpdateSessionAsync(string pesel, string key, int timestamp)
        {
            try
            {
                using (var context = new ElectoralDatabase())
                {
                    var service = context.LoginServices.FirstOrDefault(p => p.pesel == pesel);

                    if (service == null)
                    {
                        var loginService = new LoginService()
                        {
                            guid      = key,
                            timestamp = timestamp,
                            pesel     = pesel
                        };
                        context.LoginServices.Add(loginService);
                        context.Entry(loginService).State = System.Data.Entity.EntityState.Added;
                    }
                    else
                    {
                        service.timestamp            = timestamp;
                        service.guid                 = key;
                        context.Entry(service).State = System.Data.Entity.EntityState.Modified;
                    }

                    await context.SaveChangesAsync();

                    return(true);
                }
            }
            catch
            {
                return(false);
            }
        }
        public async Task <bool> CreatePersonAsync(Person person)
        {
            try
            {
                using (var context = new ElectoralDatabase())
                {
                    context.Persons.Add(person);
                    context.Entry(person).State = System.Data.Entity.EntityState.Added;

                    await context.SaveChangesAsync();

                    return(true);
                }
            }
            catch
            {
                return(false);
            }
        }
        public async Task <bool> IncrementPersonWithLawTriedToVote()
        {
            try
            {
                using (var context = new ElectoralDatabase())
                {
                    var vote = context.Votes.Single();
                    vote.WithoutLaw_TriesNum++;

                    context.Entry(vote).State = System.Data.Entity.EntityState.Modified;

                    await context.SaveChangesAsync();

                    return(true);
                }
            }
            catch
            {
                return(false);
            }
        }