public async Task <JsonResult> GetOriginalLink(string shortLink)
{
//return Json(shortLink);
if (shortLink.Length < 3)
{
return(Json(new URLShortener.Model.Exception {
Message = "Too short link"
}));
}
int ID = UtilLinks.Decode(shortLink.Substring(0, shortLink.Length - 3));
var link = await db.Links.FirstOrDefaultAsync(x => x.Id == ID);
if (link == null)
{
return(Json(new URLShortener.Model.Exception {
Message = "Original link not found"
}));
}
bool isExpired = UtilLinks.GetDateDifference(DateTime.Now, link.DateOfCreation) > 10 ? true : false;
if (link != null && isExpired)
{
return(Json(new URLShortener.Model.Exception {
Message = "This is expired link - " +
link.ShortLink + ". Update link lifetime using post request. Full link - " + link.OriginalLink
}));
}
return(Json(new OriginalLinkDTO {
OriginalLink = link.OriginalLink
}));
}
public async Task <RedirectResult> RedirectToOriginalLink(string shortLink)
{
if (shortLink.Length < 3)
{
return(Redirect("/notFound"));
}
int ID = UtilLinks.Decode(shortLink.Substring(0, shortLink.Length - 3));
var link = await db.Links.FirstOrDefaultAsync(x => x.Id == ID);
if (link == null)
{
return(Redirect("/notFound"));
}
bool isExpired = UtilLinks.GetDateDifference(DateTime.Now, link.DateOfCreation) > 10 ? true : false;
if (link != null && isExpired)
{
return(Redirect("/expiredLink"));
}
return(Redirect(link.OriginalLink));
}
public async Task <JsonResult> GenerateShortLink([FromBody] OriginalLinkDTO originalLink)
{
var link = await db.Links?.FirstOrDefaultAsync(x => x.OriginalLink == originalLink.OriginalLink);
if (link == null)
{
int maxID = 0;
if (db.Links.Count() != 0)
{
maxID = db.Links.Max(u => u.Id);
}
string shortLink = UtilLinks.GetShortLink(maxID + 1);
var newLink = new Link();
newLink.OriginalLink = originalLink.OriginalLink;
newLink.ShortLink = shortLink;
newLink.DateOfCreation = DateTime.Now;
db.Links.Add(newLink);
await db.SaveChangesAsync();
return(Json(new ShortLinkDTO {
ShortLink = newLink.ShortLink
}));
}
bool isExpired = UtilLinks.GetDateDifference(DateTime.Now, link.DateOfCreation) > 10 ? true : false;
if (isExpired)
{
link.DateOfCreation = DateTime.Now;
await db.SaveChangesAsync();
}
return(Json(new ShortLinkDTO {
ShortLink = link.ShortLink
}));
}
