private static bool IsValidQueueName()

in src/Microsoft.Azure.WebJobs.Host/Executors/HostIdValidator.cs [54:105]
41 lines of code
11 McCabe index (conditional complexity)

        private static bool IsValidQueueName(string name, out string errorMessage)
        {
            if (String.IsNullOrEmpty(name))
            {
                errorMessage = "A queue name can't be null or empty";
                return false;
            }

            // A queue name must be from 3 to 63 characters long.
            if (name.Length < 3 || name.Length > 63)
            {
                errorMessage = "A queue name must be from 3 to 63 characters long - \"" + name + "\"";
                return false;
            }

            // The dash (-) character may not be the first or last letter.
            // we will check that the 1st and last chars are valid later on.
            if (name[0] == '-' || name[name.Length - 1] == '-')
            {
                errorMessage = "The dash (-) character may not be the first or last letter - \"" + name + "\"";
                return false;
            }

            Char previousCharacter = 'a';

            // A queue name must start with a letter or number, and may 
            // contain only letters, numbers and the dash (-) character
            // All letters in a queue name must be lowercase.
            foreach (Char ch in name)
            {
                if (Char.IsUpper(ch))
                {
                    errorMessage = "Queue names must be all lower case - \"" + name + "\"";
                    return false;
                }
                if (Char.IsLetterOrDigit(ch) == false && ch != '-')
                {
                    errorMessage =
                        "A queue name can contain only letters, numbers, and dash(-) characters - \"" + name + "\"";
                    return false;
                }
                if (ch == '-' && previousCharacter == '-')
                {
                    errorMessage = "A queue name cannot contain consecutive dash(-) characters.";
                    return false;
                }
                previousCharacter = ch;
            }

            errorMessage = null;
            return true;
        }