/// <summary>
///
/// </summary>
/// <param name="galleryName"></param>
/// <param name="imageName"></param>
/// <param name="user"></param>
/// <param name="removeVote"></param>
/// <exception cref="HttpException">If something went wrong</exception>
/// <returns></returns>
public GalleryItem Vote(string galleryName, string imageName, IPrincipal user, bool? removeVote = null)
{
var galleryDirectory = GetGalleryDirectory(galleryName);
FileInfo galleryFile;
try
{
galleryFile = galleryDirectory.GetFiles(imageName).First();
}
catch (Exception)
{
throw new HttpException(512, "The image '" + imageName + "' is not in this gallery");
}
try
{
bool? voteStatus = null;
var entities = new DatabaseEntities();
var setting = (from set in entities.Settings where set.Gallery == galleryName select set).SingleOrDefault();
if (setting == null || !setting.VotingEnabled)
{
throw new HttpException(511, "Voting is disabled for this gallery");
}
var ownedByUser = entities.Uploads.Any(upload => upload.Gallery == galleryName && upload.User == user.Identity.Name && upload.Image == imageName);
if (ownedByUser)
{
throw new HttpException(513, "You cannot vote your own picture");
}
// gets all votes for this image
var votes = from vote in entities.Votes
where vote.Gallery == galleryName && vote.Image == imageName
select vote;
// ... and filter by user
var userVote = votes.Where(vote => vote.User == user.Identity.Name).SingleOrDefault();
if (userVote != null && removeVote != false)
{
// Set last change
SetLastChange(galleryDirectory);
// remove vote
entities.DeleteObject(userVote);
// commit
entities.SaveChanges();
// removed
voteStatus = false;
}
else if (userVote == null)
{
// Set last change
SetLastChange(galleryDirectory);
// add new vote
entities.Votes.AddObject(new Vote
{
Gallery = galleryDirectory.Name,
Image = galleryFile.Name,
User = user.Identity.Name,
LastUpdate = DateTime.Now,
});
// commit
entities.SaveChanges();
// added
voteStatus = true;
}
return new GalleryItem
{
FullPath = galleryFile.FullName,
Name = galleryFile.Name,
UserVote = voteStatus != false, // null or true
TotalVotes = setting.StatsEnabled ? votes.Count() : 0,
User = user.Identity.Name,
Gallery = galleryName
};
}
catch (HttpException)
{
throw;
}
catch (Exception ex)
{
throw new HttpException(520, "Unable to save changes. " + ex.Message);
}
}
