private string Validate(string propertyName)
{
// Return error message if there is an error, else return empty or null string.
switch (propertyName)
{
case "Name":
{
if (string.IsNullOrEmpty(this.Name))
{
return("The preset name can't be empty.");
}
if (this.Name.Contains(";"))
{
return("The preset name can't contains the character ';'.");
}
Application application = Application.Current as Application;
int? count = application?.Settings?.ConversionPresets?.Count(match => match?.name == this.Name);
if (count > 1)
{
return("The preset name is already used.");
}
}
break;
case "OutputFileNameTemplate":
{
string sampleOutputFilePath = this.GenerateOutputFilePath(FileConverter.Properties.Resources.OuputFileNameTemplateSample, 1, 3);
if (string.IsNullOrEmpty(sampleOutputFilePath))
{
return("The output filename template must produce a non empty result.");
}
if (!PathHelpers.IsPathValid(sampleOutputFilePath))
{
// Diagnostic to feedback purpose.
// Drive letter.
if (!PathHelpers.IsPathDriveLetterValid(sampleOutputFilePath))
{
return("The output filename template must define a root (for example c:\\, use (p) to use the input file path).");
}
// File name.
string filename = PathHelpers.GetFileName(sampleOutputFilePath);
if (filename == null)
{
return("The output file name must not be empty (use (f) to use the name of the input file).");
}
char[] invalidFileNameChars = System.IO.Path.GetInvalidFileNameChars();
for (int index = 0; index < invalidFileNameChars.Length; index++)
{
if (filename.Contains(invalidFileNameChars[index]))
{
return("The output file name must not contains the character '" + invalidFileNameChars[index] + "'.");
}
}
// Directory names.
string path = sampleOutputFilePath.Substring(3, sampleOutputFilePath.Length - 3 - filename.Length);
char[] invalidPathChars = System.IO.Path.GetInvalidPathChars();
for (int index = 0; index < invalidPathChars.Length; index++)
{
if (string.IsNullOrEmpty(path))
{
return("The output directory name must not be empty (use (d0), (d1), ... to use the name of the parent directories of the input file).");
}
if (path.Contains(invalidPathChars[index]))
{
return("The output directory name must not contains the character '" + invalidPathChars[index] + "'.");
}
}
string[] directories = path.Split('\\');
for (int index = 0; index < directories.Length; ++index)
{
string directoryName = directories[index];
if (string.IsNullOrEmpty(directoryName))
{
return("The output directory name must not be empty (use (d0), (d1), ... to use the name of the parent directories of the input file).");
}
}
return("The output filename template is invalid");
}
}
break;
}
return(string.Empty);
}
public string GenerateOutputFilePath(string inputFilePath, int numberIndex, int numberMax)
{
return(PathHelpers.GenerateFilePathFromTemplate(inputFilePath, this.OutputType, this.OutputFileNameTemplate, numberIndex, numberMax));
}
