public static bool IsValidResourceName(string name, string dataDirectory, out string errorMessage)
{
if (string.IsNullOrWhiteSpace(name))
{
errorMessage = "An empty name is forbidden for use!";
return(false);
}
if (NameUtils.IsValidResourceName(name) == false)
{
var allowedCharacters = $"('{string.Join("', '", NameUtils.AllowedResourceNameCharacters.Select(Regex.Unescape))}')";
errorMessage = $"The name '{name}' is not permitted. Only letters, digits and characters {allowedCharacters} are allowed.";
return(false);
}
if (name.Length > Constants.Documents.MaxDatabaseNameLength)
{
errorMessage = $"The name '{name}' exceeds '{Constants.Documents.MaxDatabaseNameLength}' characters!";
return(false);
}
if (name.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0)
{
errorMessage = $"The name '{name}' contains characters that are forbidden for use!";
return(false);
}
if (WindowsReservedFileNames.Any(x => string.Equals(x, name, StringComparison.OrdinalIgnoreCase)))
{
errorMessage = $"The name '{name}' is forbidden for use!";
return(false);
}
if (name.Contains(".") && NameUtils.IsDotCharSurroundedByOtherChars(name) == false)
{
errorMessage = $"The name '{name}' is not permitted. If a name contains '.' character then it must be surrounded by other allowed characters.";
return(false);
}
dataDirectory = dataDirectory ?? string.Empty;
if (Path.Combine(dataDirectory, name).Length > WindowsMaxPath)
{
int maxfileNameLength = WindowsMaxPath - dataDirectory.Length;
errorMessage = $"Invalid name! Name cannot exceed {maxfileNameLength} characters";
return(false);
}
if ((RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) &&
((name.Length > LinuxMaxFileNameLength) ||
(dataDirectory.Length + name.Length > LinuxMaxPath)))
{
int theoreticalMaxFileNameLength = LinuxMaxPath - dataDirectory.Length;
int maxfileNameLength = theoreticalMaxFileNameLength > LinuxMaxFileNameLength ? LinuxMaxFileNameLength : theoreticalMaxFileNameLength;
errorMessage = $"Invalid name! Name cannot exceed {maxfileNameLength} characters";
return(false);
}
errorMessage = null;
return(true);
}