ICommandResultBase ValidateUserName(string username, UserNameOptions options)
{
var result = new CommandResultBase();
if (username == null)
{
return(result.Failed("The username is null"));
}
var friendlyBlackList = BuildFriendlyBlackList(options.BlackListedCharacters.ToArray());
if (string.IsNullOrWhiteSpace(username) || username.Length < options.RequiredLength)
{
result.Failed($"The username must be at least {options.RequiredLength} characters in length");
}
foreach (var character in options.BlackListedCharacters)
{
if (username.IndexOf(character) >= 0)
{
result.Failed($"The username cannot contain {friendlyBlackList} characters");
}
}
return(result.Errors.Any()
? result.Failed()
: result.Success());
}
public UserNameValidator()
{
// TODO: Update error to reflect condifured UserNameOptions
var options = new UserNameOptions();
ErrorMessage = BuildError(options);
}
string BuildError(UserNameOptions options)
{
var sb = new StringBuilder();
var friendlyBlackList = BuildFriendlyBlackList(options.BlackListedCharacters.ToArray());
sb.Append("The {0} field cannot contain ")
.Append(friendlyBlackList);
if (options.RequiredLength > 0)
{
sb.Append(" and must be at least ")
.Append(options.RequiredLength)
.Append(" characters in length");
}
return(sb.ToString());
}