Bloom.Book.BookStorage.Update C# (CSharp) Method

        private void Update(string fileName, string factoryPath = "")
        {
            if (!IsUserFolder)
            {
                if (fileName.ToLowerInvariant().Contains("xmatter") && !fileName.ToLower().StartsWith("factory-xmatter"))
                {
                    return; //we don't want to copy custom xmatters around to the program files directory, template directories, the Bloom src code folders, etc.
                }
            }

            // do not attempt to copy files to the installation directory
            var targetDirInfo = new DirectoryInfo(_folderPath);
            if (SIL.PlatformUtilities.Platform.IsMono)
            {
                // do not attempt to copy files to the "/usr" directory
                if (targetDirInfo.FullName.StartsWith("/usr")) return;
            }
            else
            {
                // do not attempt to copy files to the "Program Files" directory
                var programFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles);
                if (!string.IsNullOrEmpty(programFolderPath))
                {
                    var programsDirInfo = new DirectoryInfo(programFolderPath);
                    if (String.Compare(targetDirInfo.FullName, programsDirInfo.FullName, StringComparison.InvariantCultureIgnoreCase) == 0) return;
                }

                // do not attempt to copy files to the "Program Files (x86)" directory either
                if (Environment.Is64BitOperatingSystem)
                {
                    programFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86);
                    if (!string.IsNullOrEmpty(programFolderPath))
                    {
                        var programsDirInfo = new DirectoryInfo(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles));
                        if (String.Compare(targetDirInfo.FullName, programsDirInfo.FullName, StringComparison.InvariantCultureIgnoreCase) == 0) return;
                    }
                }
            }

            string documentPath="notSet";
            try
            {
                if(string.IsNullOrEmpty(factoryPath))
                {
                    factoryPath = _fileLocator.LocateFile(fileName);
                }
                if(string.IsNullOrEmpty(factoryPath))//happens during unit testing
                    return;

                documentPath = Path.Combine(_folderPath, fileName);
                if(!RobustFile.Exists(documentPath))
                {
                    Logger.WriteMinorEvent("BookStorage.Update() Copying missing file {0} to {1}", factoryPath, documentPath);
                    RobustFile.Copy(factoryPath, documentPath);
                    return;
                }
                // due to BL-2166, we no longer compare times since downloaded books often have
                // more recent times than the DistFiles versions we want to use
                // var documentTime = File.GetLastWriteTimeUtc(documentPath);
                if (factoryPath == documentPath)
                    return; // no point in trying to update self!
                if (IsPathReadonly(documentPath))
                {
                    var msg = string.Format("Could not update one of the support files in this document ({0}) because the destination was marked ReadOnly.", documentPath);
                    Logger.WriteEvent(msg);
                    SIL.Reporting.ErrorReport.NotifyUserOfProblem(msg);
                    return;
                }
                Logger.WriteMinorEvent("BookStorage.Update() Copying file {0} to {1}", factoryPath, documentPath);

                RobustFile.Copy(factoryPath, documentPath, true);
                //if the source was locked, don't copy the lock over
                RobustFile.SetAttributes(documentPath, FileAttributes.Normal);
            }
            catch (Exception e)
            {
                if(documentPath.Contains(System.Environment.GetFolderPath(System.Environment.SpecialFolder.ProgramFiles))
                    || documentPath.ToLowerInvariant().Contains("program"))//english only
                {
                    Logger.WriteEvent("Could not update file {0} because it was in the program directory.", documentPath);
                    return;
                }
                if(_alreadyNotifiedAboutOneFailedCopy)
                    return;//don't keep bugging them
                _alreadyNotifiedAboutOneFailedCopy = true;
                var msg = String.Format("Could not update one of the support files in this document ({0} to {1}).", documentPath, factoryPath);
                NonFatalProblem.Report(ModalIf.None, PassiveIf.All, "Can't Update Support File", msg, exception: e);
            }
        }