int MeasureNewPasswordDistance()

in src/Unosquare.PassCore.Common/IPasswordChangeProvider.cs [29:63]

• 21 lines of code
• 8 McCabe index (conditional complexity)

        int MeasureNewPasswordDistance(string currentPassword, string newPassword)
        {
            var n = currentPassword.Length;
            var m = newPassword.Length;
            var d = new int[n + 1, m + 1];

            // Step 1
            if (n == 0)
                return m;

            if (m == 0)
                return n;

            // Step 2
            for (int i = 0; i <= n; d[i, 0] = i++) { }

            for (int j = 0; j <= m; d[0, j] = j++) { }

            // Step 3
            for (int i = 1; i <= n; i++)
            {
                //Step 4
                for (int j = 1; j <= m; j++)
                {
                    // Step 5
                    int cost = (newPassword[j - 1] == currentPassword[i - 1]) ? 0 : 1;
                    // Step 6
                    d[i, j] = Math.Min(Math.Min(d[i - 1, j] + 1, d[i, j - 1] + 1), d[i - 1, j - 1] + cost);
                }
            }

            // Step 7
            return d[n, m];

        }