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using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
namespace Timeline.Models.Validation
{
public class NameValidator : Validator<string>
{
private static Regex UniqueIdRegex { get; } = new Regex(@"^[a-zA-Z0-9]{32}$");
public List<string> DisallowedNames { get; set; } = new List<string>();
public const int MaxLength = 26;
protected override (bool, string) DoValidate(string value)
{
if (DisallowedNames.Contains(value))
{
return (false, Resource.NameDisallowed);
}
if (value.Length == 0)
{
return (false, Resource.NameCantBeEmpty);
}
if (value.Length > MaxLength)
{
return (false, string.Format(Resource.NameCantBeLongerThan, MaxLength));
}
foreach ((char c, int i) in value.Select((c, i) => (c, i)))
{
if (!(char.IsLetterOrDigit(c) || c == '-' || c == '_'))
{
return (false, Resource.NameInvalidChar);
}
}
// Currently name can't be longer than 26. So this is not needed. But reserve it for future use.
if (UniqueIdRegex.IsMatch(value))
{
return (false, Resource.NameCantBeUniqueIdPattern);
}
return (true, GetSuccessMessage());
}
}
}
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