Fixed sonarqube findings
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//CipherStreamJava/src/main/java/com/mattrixwv/CipherStreamJava/monoSubstitution/Porta.java
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//Mattrixwv
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// Created: 02-28-22
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//Modified: 02-28-22
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package com.mattrixwv.cipherstream.monosubstitution;
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import com.mattrixwv.cipherstream.exceptions.InvalidInputException;
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import com.mattrixwv.cipherstream.exceptions.InvalidKeywordException;
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public class Porta{
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private static final String[] tableau = {
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"NOPQRSTUVWXYZABCDEFGHIJKLM", //A-B
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"OPQRSTUVWXYZNMABCDEFGHIJKL", //C-D
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"PQRSTUVWXYZNOLMABCDEFGHIJK", //E-F
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"QRSTUVWXYZNOPKLMABCDEFGHIJ", //G-H
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"RSTUVWXYZNOPQJKLMABCDEFGHI", //I-J
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"STUVWXYZNOPQRIJKLMABCDEFGH", //K-L
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"TUVWXYZNOPQRSHIJKLMABCDEFG", //M-N
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"UVWXYZNOPQRSTGHIJKLMABCDEF", //O-P
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"VWXYZNOPQRSTUFGHIJKLMABCDE", //Q-R
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"WXYZNOPQRSTUVEFGHIJKLMABCD", //S-T
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"XYZNOPQRSTUVWDEFGHIJKLMABC", //U-V
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"YZNOPQRSTUVWXCDEFGHIJKLMAB", //W-X
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"ZNOPQRSTUVWXYBCDEFGHIJKLMA" //Y-Z
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};
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private String inputString;
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private String outputString;
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private String keyword;
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private boolean preserveCapitals;
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private boolean preserveWhitespace;
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private boolean preserveSymbols;
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private void setKeyword(String keyword) throws InvalidKeywordException{
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//Make sure the keyword isn't null
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if(keyword == null){
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throw new InvalidKeywordException("Keyword cannot be null");
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}
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//Convert all letters to uppercase
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keyword = keyword.toUpperCase();
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//Remove all characters except capital letters and save the string
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keyword = keyword.replaceAll("[^A-Z]", "");
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this.keyword = keyword;
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//If after eliminating all ususable characters the keyword is empty throw an exception
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if(this.keyword.isBlank() || (this.keyword.length() < 2)){
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throw new InvalidKeywordException("Keyword must contain at least 2 letters");
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}
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}
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private void setInputString(String inputString) throws InvalidInputException{
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//Ensure the input isn't null
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if(inputString == null){
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throw new InvalidInputException("Input cannot be null");
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}
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//Apply removal options
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if(!preserveCapitals){
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inputString = inputString.toUpperCase();
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}
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if(!preserveWhitespace){
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inputString = inputString.replaceAll("\\s", "");
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}
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if(!preserveSymbols){
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inputString = inputString.replaceAll("[^a-zA-Z\\s]", "");
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}
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//Save the string
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this.inputString = inputString;
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//Ensure the string isn't blank
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if(this.inputString.isBlank()){
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throw new InvalidInputException("Input must contain at least 1 letter");
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}
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}
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private char getReplacer(int keywordCnt, char letter){
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char keyLetter = keyword.charAt(keywordCnt % keyword.length());
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int tableauColumn = (Character.toUpperCase(letter) - 'A');
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char replacer;
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switch(keyLetter){
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case 'A':
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case 'B':
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replacer = tableau[0].charAt(tableauColumn); break;
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case 'C':
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case 'D':
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replacer = tableau[1].charAt(tableauColumn); break;
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case 'E':
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case 'F':
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replacer = tableau[2].charAt(tableauColumn); break;
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case 'G':
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case 'H':
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replacer = tableau[3].charAt(tableauColumn); break;
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case 'I':
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case 'J':
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replacer = tableau[4].charAt(tableauColumn); break;
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case 'K':
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case 'L':
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replacer = tableau[5].charAt(tableauColumn); break;
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case 'M':
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case 'N':
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replacer = tableau[6].charAt(tableauColumn); break;
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case 'O':
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case 'P':
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replacer = tableau[7].charAt(tableauColumn); break;
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case 'Q':
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case 'R':
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replacer = tableau[8].charAt(tableauColumn); break;
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case 'S':
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case 'T':
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replacer = tableau[9].charAt(tableauColumn); break;
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case 'U':
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case 'V':
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replacer = tableau[10].charAt(tableauColumn); break;
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case 'W':
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case 'X':
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replacer = tableau[11].charAt(tableauColumn); break;
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case 'Y':
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case 'Z':
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replacer = tableau[12].charAt(tableauColumn); break;
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default:
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replacer = letter;
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}
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return replacer;
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}
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private void encode(){
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StringBuilder output = new StringBuilder();
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//Step through every character in the inputString and advance it the correct amount according to the keyword and tableau
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int keywordCnt = 0;
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for(char letter : inputString.toCharArray()){
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//If the character is a letter replace with the corresponding character from the tableau
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if(Character.isUpperCase(letter)){
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letter = Character.toUpperCase(getReplacer(keywordCnt, letter));
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++keywordCnt;
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}
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else if(Character.isLowerCase(letter)){
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letter = Character.toLowerCase(getReplacer(keywordCnt, letter));
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++keywordCnt;
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}
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//Add the current character to the output
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output.append(letter);
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}
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//Save the output
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outputString = output.toString();
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}
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private void decode(){
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//Decoding is the same as encoding
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encode();
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}
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//Constructor
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public Porta(){
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preserveCapitals = false;
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preserveWhitespace = false;
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preserveSymbols = false;
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reset();
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}
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public Porta(boolean preserveCapitals, boolean preserveWhitespace, boolean preserveSymbols){
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this.preserveCapitals = preserveCapitals;
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this.preserveWhitespace = preserveWhitespace;
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this.preserveSymbols = preserveSymbols;
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reset();
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}
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public String encode(String keyword, String inputString) throws InvalidKeywordException, InvalidInputException{
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//Set the parameters
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reset();
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setKeyword(keyword);
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setInputString(inputString);
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//Encode and return the message
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encode();
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return outputString;
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}
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public String decode(String keyword, String inputString) throws InvalidKeywordException, InvalidInputException{
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//Set the parameters
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reset();
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setKeyword(keyword);
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setInputString(inputString);
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//Decode and return the message
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decode();
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return outputString;
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}
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public String getInputString(){
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return inputString;
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}
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public String getOutputString(){
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return outputString;
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}
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public String getKeyword(){
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return keyword;
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}
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public void reset(){
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inputString = "";
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outputString = "";
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keyword = "";
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}
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}
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