Password.cpp

#include "Password.h"
#include <string>
#include <cctype> // For isupper() and islower()

using std::string;

/*
  The function receives a string and counts how many times the same character 
  occurs at the beginning of the string, before any other characters (or the
  end of the string). The function is case-sensitive so 'Z' is different than
  'z' and any ASCII characters are allowed.
*/
int Password::count_leading_characters(string phrase) {
    int repetition = 1;
    int index = 0;
    while (index < phrase.length() - 1 && phrase[index] == phrase[index + 1]) {
        repetition++;
        index++;
    }
    return repetition;
}

/*
  Receives a string and returns whether it has both at least one upper-case
  letter and at least one lower-case letter.
*/
bool Password::has_mixed_case(string pass) {
    bool has_upper = false;
    bool has_lower = false;

    for (char ch : pass) {
        if (isupper(ch)) {
            has_upper = true;
        } else if (islower(ch)) {
            has_lower = true;
        }

        // If both upper and lower cases are found, we can return true
        if (has_upper && has_lower) {
            return true;
        }
    }

    // Return false if either uppercase or lowercase is missing
    return false;
}