/// <summary>
/// Asynchronously test the validity of a string value against the defined character set
/// </summary>
/// <param name="valueToTest">The string that is to be tested for validity</param>
/// <param name="characterSetName">The name of the character set against which to test</param>
/// <returns>Boolean true if the string is valid based on the defined rule, otherwise false</returns>
public async Task <bool> GetIsValidAsync(string valueToTest, string characterSetName)
{
CharacterSetList characterSets;
string allowedCharacters;
DisallowedFragmentList disallowedFragmentList;
IEnumerable <string> disallowedFragments;
// Retrieve the allowed characters
characterSets = await _characterSetListCache.GetCharacterSetListAsync().ConfigureAwait(false);
allowedCharacters = characterSets.GetAllowedCharacters(characterSetName);
// Delegate the testing task for allowed characters
if (!StringContentValidator.ContainsOnly(valueToTest, allowedCharacters))
{
return(false);
}
// Allowed characters rule passed; now check for the presence of disallowed fragments
disallowedFragmentList = await _disallowedFragmentListCache.GetDisallowedFragmentListAsync().ConfigureAwait(false);
disallowedFragments = disallowedFragmentList.GetDisallowedFragments(characterSetName);
return(StringContentValidator.DoesNotContainAnyOf(valueToTest, disallowedFragments));
}
