private bool EnsureAvailableName(ref string destinationDisplayName, Folder parent, bool creatingDocument, bool newVersion = false)
{
const int MaxIterations = 10;
string originalDisplayName = destinationDisplayName;
string name = destinationDisplayName.ToUpperInvariant();
if (NameConflicts(parent, name, creatingDocument, newVersion))
{
int iteration = 0;
do
{
if (iteration == MaxIterations)
{
// Try one last time with a random name.
destinationDisplayName = Utilities.GenerateNewName(originalDisplayName, creatingDocument, Utilities.GenerateRandomString("0123456789", 8));
name = destinationDisplayName.ToUpperInvariant();
iteration++;
continue;
}
else if (iteration == MaxIterations + 1)
{
return false;
}
destinationDisplayName = Utilities.GenerateNewName(originalDisplayName, creatingDocument, (iteration + 2).ToString());
name = destinationDisplayName.ToUpperInvariant();
iteration++;
// Don't allow new versions if we already had a name conflict.
newVersion = false;
} while (NameConflicts(parent, name, creatingDocument, newVersion));
}
return true;
}
private bool NameConflicts(Folder parent, string name, bool creatingDocument, bool newVersion)
{
File file = parent.Files.AsQueryable().Where(f => f.Name == name).SingleOrDefault();
if (file == null || file.State == ObjectState.Deleted)
return false;
if (creatingDocument && newVersion && file is Document)
return false;
return true;
}
private FileBrowseViewModel CreateBrowseModelForFolder(Folder folder, string fullDisplayName)
{
long userId = User.Identity.GetUserId();
Folder userRootFolder = _fileManager.GetUserRootFolder(userId);
if (folder == null)
{
folder = userRootFolder;
fullDisplayName = "";
}
Folder originalFolder = folder;
// Follow any invitation link.
if (folder.InvitationId != null)
folder = folder.Invitation.Target;
FileBrowseViewModel model = new FileBrowseViewModel();
model.FullDisplayName = fullDisplayName;
model.DisplayName = originalFolder == userRootFolder ? "Home" : originalFolder.DisplayName;
model.State = originalFolder.State;
model.Files = (
from file in folder.Files.AsQueryable()
where file.State == ObjectState.Normal || file.State == folder.State // Always show deleted files in a deleted folder
orderby !(file is Folder) ascending, file.Name ascending
let latestVersion = (file is Document) ? (from version in ((Document)file).DocumentVersions.AsQueryable()
orderby version.TimeStamp descending
select version).FirstOrDefault()
: null
select new FileBrowseViewModel.FileEntry
{
Id = file.Id,
FullDisplayName = fullDisplayName + "/" + file.DisplayName,
DisplayName = file.DisplayName,
IsFolder = file is Folder,
Size = latestVersion != null ? latestVersion.Blob.Size : 0,
TimeStamp = latestVersion != null ? latestVersion.TimeStamp : DateTime.UtcNow,
State = file.State,
HasInvitation = (file is Folder) ? ((Folder)file).InvitationId != null : false,
HasTargetInvitations = (file is Folder) ? ((Folder)file).TargetOfInvitations.Any() : false
}
).ToList();
model.Parents = new List<Tuple<string, string>>();
// Construct the parent list for the breadcrumb.
List<Folder> parentFolders = new List<Folder>();
Folder currentFolder = folder;
while (currentFolder != userRootFolder)
{
if (currentFolder.TargetOfInvitations.Any())
{
model.SharedFolder = true;
// Follow any invitation link backwards.
var invitation = _fileManager.GetInvitationForUser(currentFolder, userId);
Folder acceptedFolder = null;
if (invitation != null)
acceptedFolder = invitation.AcceptedFolders.SingleOrDefault();
if (acceptedFolder != null)
{
currentFolder = acceptedFolder;
model.SharedWithMe = true;
}
}
if (currentFolder != userRootFolder)
parentFolders.Add(currentFolder);
currentFolder = currentFolder.ParentFolder;
};
parentFolders.Reverse();
if (parentFolders.Count != 0)
parentFolders.RemoveAt(parentFolders.Count - 1);
if (folder != userRootFolder)
model.Parents.Add(new Tuple<string, string>("Home", ""));
StringBuilder sb = new StringBuilder();
foreach (var f in parentFolders)
{
sb.Append('/');
sb.Append(f.DisplayName);
model.Parents.Add(new Tuple<string, string>(f.DisplayName, sb.ToString()));
}
return model;
}