public string GetTargetUrl(string shortenedPath)
{
var result = ShortenedUrls.FirstOrDefault(u => u.ShortenedPath == shortenedPath);
if (result == null)
{
return(null);
}
var today = GetToday();
var urlUseCount = UrlUseCounts.FirstOrDefault(c => c.ShortenedUrlId == result.Id && c.Date == today);
if (urlUseCount == null)
{
UrlUseCounts.Add(new UrlUseCount {
ShortenedUrlId = result.Id, Date = today, Count = 1
});
}
else
{
urlUseCount.Count++;
}
result.LastUseTime = GetNowTime();
this.SaveChanges();
return(result.TargetUrl);
}
public bool CreateShortenedUrl(string shortenedPath, string targetUrl)
{
if (ShortenedUrls.Any(u => u.ShortenedPath == shortenedPath))
{
return(false);
}
ShortenedUrls.Add(new ShortenedUrl()
{
ShortenedPath = shortenedPath, TargetUrl = targetUrl
});
this.SaveChanges();
return(true);
}
public async Task <IEnumerable <ShortenedUrl> > GetRecentShortenedUrls()
{
return(await ShortenedUrls.OrderByDescending(url => url.LastUseTime).Take(10).ToListAsync());
}