/// <summary>
/// Each policy actually describes two positions in the password,
/// where 1 means the first character, 2 means the second character, and so on.
/// (Be careful; Toboggan Corporate Policies have no concept of "index zero"!)
/// Exactly one of these positions must contain the given letter.
/// Other occurrences of the letter are irrelevant for the purposes of policy enforcement.
/// </summary>
/// <param name="passwordWithSpec"></param>
/// <returns></returns>
internal bool CheckPasswordOnSpecPart2(PasswordWithSpec passwordWithSpec)
{
var charToCheck = passwordWithSpec.Spec.Character;
var firstPosZeroBased = passwordWithSpec.Spec.First - 1;
var secondPosZeroBased = passwordWithSpec.Spec.Second - 1;
var checkFirstChar = passwordWithSpec.Password[firstPosZeroBased] == charToCheck;
var checkSecondChar = passwordWithSpec.Password[secondPosZeroBased] == charToCheck;
var xor = checkFirstChar ^ checkSecondChar;
return(xor);
}
private PasswordWithSpec SplitUp(string line)
{
var pwWithSpec = line.Split(':');
var specSplit = pwWithSpec[0].Split(' ');
var occ = specSplit[0].Split('-');
var pwSpec = new PasswordWithSpec
{
Password = pwWithSpec[1].Trim(),
Spec = new Spec
{
Character = specSplit[1].First(),
First = int.Parse(occ[0]),
Second = int.Parse(occ[1])
}
};
return(pwSpec);
}
internal bool CheckPasswordOnSpecPart1(PasswordWithSpec passwordWithSpec)
{
var nrOfOccurances = passwordWithSpec.Password.Count(c => c == passwordWithSpec.Spec.Character);
return(nrOfOccurances >= passwordWithSpec.Spec.First && nrOfOccurances <= passwordWithSpec.Spec.Second);
}
