// Generate a random filename for a thumbnail and make sure that the file does not exist.
private static string GenerateRandomFilename()
{
string rndFileName;
// if CDN flag is active, check if file exists on CDN, otherwise check if file exists on local storage
if (Settings.UseContentDeliveryNetwork)
{
// make sure blob with same name doesn't exist already
do
{
rndFileName = Guid.NewGuid().ToString();
} while (CloudStorageUtility.BlobExists(rndFileName, "thumbs"));
rndFileName = Guid.NewGuid().ToString();
}
else
{
do
{
rndFileName = Guid.NewGuid().ToString();
} while (FileSystemUtility.FileExists(rndFileName, DestinationPathThumbs));
}
return(rndFileName);
}
// store uploaded avatar
public static async Task <bool> GenerateAvatar(Image inputImage, string userName, string mimetype)
{
try
{
// store avatar locally
var originalImage = new KalikoImage(inputImage);
originalImage.Scale(new PadScaling(MaxWidth, MaxHeight)).SaveJpg(DestinationPathAvatars + '\\' + userName + ".jpg", 90);
if (!Settings.UseContentDeliveryNetwork)
{
return(true);
}
// call upload to storage since CDN is enabled in config
string tempAvatarLocation = DestinationPathAvatars + '\\' + userName + ".jpg";
// the avatar file was not found at expected path, abort
if (!FileSystemUtility.FileExists(tempAvatarLocation, DestinationPathAvatars))
{
return(false);
}
// upload to CDN
await CloudStorageUtility.UploadBlobToStorageAsync(tempAvatarLocation, "avatars");
// delete local file after uploading to CDN
File.Delete(tempAvatarLocation);
return(true);
}
catch (Exception ex)
{
return(false);
}
}
// generate a thumbnail while removing transparency and preserving aspect ratio
public static async Task <string> GenerateThumbFromUrl(string sourceUrl)
{
var randomFileName = GenerateRandomFilename();
var request = WebRequest.Create(sourceUrl);
request.Timeout = 300;
using (var response = request.GetResponse())
{
var originalImage = new KalikoImage(response.GetResponseStream())
{
BackgroundColor = Color.Black
};
originalImage.Scale(new PadScaling(MaxWidth, MaxHeight)).SaveJpg(DestinationPathThumbs + '\\' + randomFileName + ".jpg", 90);
}
// call upload to storage method if CDN config is enabled
if (Settings.UseContentDeliveryNetwork)
{
string tempThumbLocation = DestinationPathThumbs + '\\' + randomFileName + ".jpg";
if (FileSystemUtility.FileExists(tempThumbLocation, DestinationPathThumbs))
{
await CloudStorageUtility.UploadBlobToStorageAsync(tempThumbLocation, "thumbs");
// delete local file after uploading to CDN
File.Delete(tempThumbLocation);
}
}
return(randomFileName + ".jpg");
}
// generate a thumbnail while removing transparency and preserving aspect ratio
public static async Task <string> GenerateThumbFromImageUrl(string imageUrl, int timeoutInMilliseconds = 3000)
{
var randomFileName = GenerateRandomFilename();
var tempPath = Path.Combine(DestinationPathThumbs, $"{randomFileName}.jpg");
var request = WebRequest.Create(imageUrl);
request.Timeout = timeoutInMilliseconds; //Putts: extended this from 300 mills
using (var response = request.GetResponse())
{
var originalImage = new KalikoImage(response.GetResponseStream())
{
BackgroundColor = Color.Black
};
originalImage.Scale(new PadScaling(MaxWidth, MaxHeight)).SaveJpg(tempPath, 90);
}
// call upload to storage method if CDN config is enabled
if (Settings.UseContentDeliveryNetwork)
{
if (FileSystemUtility.FileExists(tempPath, DestinationPathThumbs))
{
await CloudStorageUtility.UploadBlobToStorageAsync(tempPath, "thumbs");
// delete local file after uploading to CDN
File.Delete(tempPath);
}
}
return(Path.GetFileName(tempPath));
}
// delete a user account and all history: comments, posts and votes
public static bool DeleteUser(string userName)
{
using (var db = new voatEntities())
{
using (var tmpUserManager = new UserManager <VoatUser>(new UserStore <VoatUser>(new ApplicationDbContext())))
{
var tmpuser = tmpUserManager.FindByName(userName);
if (tmpuser != null)
{
// remove voting history for submisions
db.SubmissionVoteTrackers.RemoveRange(db.SubmissionVoteTrackers.Where(x => x.UserName == userName));
// remove voting history for comments
db.CommentVoteTrackers.RemoveRange(db.CommentVoteTrackers.Where(x => x.UserName == userName));
// remove all comments
var comments = db.Comments.Where(c => c.UserName == userName).ToList();
foreach (Comment c in comments)
{
c.IsDeleted = true;
c.Content = "deleted by user";
}
db.SaveChanges();
// remove all submissions
var submissions = db.Submissions.Where(c => c.UserName == userName).ToList();
foreach (var s in submissions)
{
if (s.Type == 1)
{
s.IsDeleted = true;
s.Content = "deleted by user";
s.Title = "deleted by user";
}
else
{
s.IsDeleted = true;
s.LinkDescription = "deleted by user";
s.Content = "http://voat.co";
}
}
// resign from all moderating positions
db.SubverseModerators.RemoveRange(db.SubverseModerators.Where(m => m.UserName.Equals(userName, StringComparison.OrdinalIgnoreCase)));
// delete comment reply notifications
db.CommentReplyNotifications.RemoveRange(db.CommentReplyNotifications.Where(crp => crp.Recipient.Equals(userName, StringComparison.OrdinalIgnoreCase)));
// delete post reply notifications
db.SubmissionReplyNotifications.RemoveRange(db.SubmissionReplyNotifications.Where(prp => prp.Recipient.Equals(userName, StringComparison.OrdinalIgnoreCase)));
// delete private messages
db.PrivateMessages.RemoveRange(db.PrivateMessages.Where(pm => pm.Recipient.Equals(userName, StringComparison.OrdinalIgnoreCase)));
// delete user preferences
var userPrefs = db.UserPreferences.Find(userName);
if (userPrefs != null)
{
// delete short bio
userPrefs.Bio = null;
// delete avatar
if (userPrefs.Avatar != null)
{
var avatarFilename = userPrefs.Avatar;
if (Settings.UseContentDeliveryNetwork)
{
// try to delete from CDN
CloudStorageUtility.DeleteBlob(avatarFilename, "avatars");
}
else
{
// try to remove from local FS
string tempAvatarLocation = Settings.DestinationPathAvatars + '\\' + userName + ".jpg";
// the avatar file was not found at expected path, abort
if (!FileSystemUtility.FileExists(tempAvatarLocation, Settings.DestinationPathAvatars))
{
return(false);
}
// exec delete
File.Delete(tempAvatarLocation);
}
}
}
// TODO:
// keep this updated as new features are added (delete sets etc)
// username will stay permanently reserved to prevent someone else from registering it and impersonating
db.SaveChanges();
return(true);
}
// user account could not be found
return(false);
}
}
}
