/// <summary>
/// Создание сжатой ссылки
/// </summary>
/// <param name="userUrl"><seealso cref="UserUrl"/></param>
/// <param name="userGuid">гуид пользователя</param>
/// <returns></returns>
public async Task <string> AddUserUrlAsync(UserUrl userUrl, Guid userGuid)
{
using (var context = new UrlShortenerContext())
{
if (userUrl == null || userGuid == Guid.Empty)
{
throw new NullReferenceException();
}
//есть такой пользователь в Бд?
var user = await context.Users.FirstOrDefaultAsync(x => x.UserGuid == userGuid);
var userId = user?.Id;
if (userId == null)
{
//добавляем в БД пользователя
var result = context.Users.Add(new User()
{
UserGuid = userGuid
});
userId = result.Id;
}
userUrl.UserId = (long)userId;
var newUrl = context.UserUrls.Add(userUrl);
await context.SaveChangesAsync();
return(newUrl.CompactUrl);
}
}
public async Task <IActionResult> Create([Bind("Id,FullName")] Url url)
{
if (ModelState.IsValid)
{
url.FullName = UrlHelpers.AppendProtocol(url.FullName);
var innerUrl = await _context.Urls.FirstOrDefaultAsync(dbUrl => dbUrl.FullName == url.FullName);
if (innerUrl == null)
{
url.ShortName = UrlHelpers.ShortenUrl(url.FullName);
_context.Add(url);
await _context.SaveChangesAsync();
}
return(RedirectToAction(nameof(Index)));
}
return(View(url));
}
public async Task <string> CreateShortenedUrl(string originalUrl)
{
if (!originalUrl.StartsWith("http://") && !originalUrl.StartsWith("https://"))
{
originalUrl = "https://" + originalUrl;
}
var newUrlInfo = new UrlInfo
{
Original = originalUrl
};
_urlShortenerContext.UrlInfos.Add(newUrlInfo);
await _urlShortenerContext.SaveChangesAsync();
var key = GenerateShortenedUrlKey(newUrlInfo.Id);
newUrlInfo.Shortened = key.ToLower();
await _urlShortenerContext.SaveChangesAsync();
return(newUrlInfo.Shortened);
}
/// <summary>
/// Инкремент кол-во переходов по ссылке
/// </summary>
/// <param name="compactUrl">ключ компактной ссылки</param>
/// <returns></returns>
public async Task IncrementNumberOfViewAsync(string compactUrl)
{
using (var context = new UrlShortenerContext())
{
var userUrl = await context.UserUrls.FirstOrDefaultAsync(x => x.CompactUrl == compactUrl);
if (userUrl != null)
{
userUrl.NumberOfViews += 1;
await context.SaveChangesAsync();
}
}
}