StringLogic.java

package org.codedifferently;

public class StringLogic {

    //generates a receipt code after receiving the first and lastName. takes the first 3 letters
    //of both to include with a randomly generated number
    public String generateReceiptCode(String firstName, String lastName) {

        String firstNameTruncate = (firstName.length() > 3) ? firstName.substring(0,3) : firstName;
        String lastNameTruncate = (lastName.length() > 3) ? lastName.substring(0,3) : lastName;
        String nameTruncated = firstNameTruncate + lastNameTruncate;

        MathCalc matchCalc = new MathCalc();
        int randomNum = matchCalc.generateRandomNumber(10,100);
        return nameTruncated + randomNum;
    }

    //validates coupon code, returns true if it starts with a c and contains a -
    public boolean checkValidCoupon(String couponCode) {
        if (couponCode.startsWith(("c")) && couponCode.contains("-")) {
            return true;
        }
        return false;
    }
}