/// <summary>
/// Unshares a file with all shared users on EnigmaEfs.
/// </summary>
/// <param name="pathOnEfs"></param>
public void Unshare(string pathOnEfs)
{
var encryptedFile = new EncryptedFile(pathOnEfs.Substring(pathOnEfs.LastIndexOf('\\') + 1).Split('.')[0]);
var updatedEncryptedFileRaw = encryptedFile.Unshare(File.ReadAllBytes(pathOnEfs), currentUser.Id);
if (CanItBeStored(updatedEncryptedFileRaw.Length))
{
CreateFile(updatedEncryptedFileRaw, RootDir + "\\" + UserDir + "\\" + encryptedFile.GetEncryptedFileFullName());
DeleteFile(pathOnEfs);
}
else
{
throw new Exception("Insufficient storage available. File can't be updated.");
}
}
/// <summary>
/// Unshares a file with specific user on EnigmaEfs.
/// </summary>
/// <param name="pathOnEfs">The name of the shared file.</param>
/// <param name="userId">Unique user identifier from the database.</param>
public void Unshare(string pathOnEfs, int userId)
{
var encryptedFile = new EncryptedFile(pathOnEfs.Substring(pathOnEfs.LastIndexOf('\\') + 1).Split('.')[0]);
var updatedEncryptedFileRaw = encryptedFile.Unshare(File.ReadAllBytes(pathOnEfs), currentUser.Id, userId, out var numberOfSharedUsers);
if (CanItBeStored(updatedEncryptedFileRaw.Length))
{
// File is moved from shared folder to user's folder.
if (numberOfSharedUsers != 1)
{
CreateFile(updatedEncryptedFileRaw, SharedDir + "\\" + encryptedFile.GetEncryptedFileFullName());
}
// If no other user other than file owner can access a file, it's moved from shared folder to file owner's folder.
else
{
CreateFile(updatedEncryptedFileRaw, RootDir + "\\" + UserDir + "\\" + encryptedFile.GetEncryptedFileFullName());
DeleteFile(pathOnEfs);
}
}
else
{
throw new Exception("Insufficient storage available. File can't be updated.");
}
}
