private static void UnknownOptionRules(string[] validOptions, OptionSource[] optionSources)
{
if (optionSources == null) return;
var possibleInvalidOptions = optionSources.Select(option => option.Name)
.Except(validOptions);
if (possibleInvalidOptions.Any())
{
var invalidOptions = possibleInvalidOptions
.Select(invalidOption => optionSources.First(x => x.Name == invalidOption))
.ToArray();
var message = InformAboutUnknownOptions(validOptions, optionSources, invalidOptions);
message += InformAboutPossibleCasingIssues(validOptions, optionSources, invalidOptions);
throw new OptionException(message, String.Empty);
}
}
private static string InformAboutPossibleCasingIssues(string[] validOptions, OptionSource[] optionSources, OptionSource[] invalidOptions)
{
var possibleIncorrectlyCasedOptions = invalidOptions.Select(option => option.Name.ToLower())
.Intersect(validOptions.Select(option => option.ToLower()));
if (possibleIncorrectlyCasedOptions.Any())
{
var incorrectlyCasedOptions = possibleIncorrectlyCasedOptions.Select(option =>
new
{
Correct = optionSources.First(x => x.Name.ToLower() == option).Name,
Incorrect = invalidOptions.First(x => x.Name.ToLower() == option).Name
});
string message = "The following options are incorrectly cased." + Environment.NewLine;
message += String.Join(", ", incorrectlyCasedOptions.Select(x => x.Incorrect + " should be " + x.Correct).ToArray()) + Environment.NewLine;
return message;
}
return String.Empty;
}
