public async Task<IHttpActionResult> ListPagesByDay(DateTime day, string token = null)
        {
            var persistence = new PagePersistence();

            var pages = await persistence.ListByDay(day, token);

            return Ok(pages);
        }
        public async Task<IHttpActionResult> GetOnlyOnePage(DateTime day, Uri url)
        {
            var persistence = new PagePersistence();

            var page = await persistence.Get(day, url);

            return Ok(page);
        }
        public async Task<IHttpActionResult> SaveASinglePage(Page page)
        {
            var persistence = new PagePersistence();

            page.Day = DateTime.Today;

            await persistence.Save(page);

            return Ok(page);
        }
        public async Task<IHttpActionResult> SaveAMultiplePage(Page[] pages)
        {
            var persistence = new PagePersistence();

            foreach (var page in pages)
            {
                page.Day = DateTime.Today;
            }

            await persistence.Save(pages);

            return Ok(pages);
        }