From 72d556ace2fec500c676519a616c04d20c777416 Mon Sep 17 00:00:00 2001
From: "Bambusek, David" <dbambusek@netsuite.com>
Date: Fri, 2 Oct 2020 12:23:41 +0200
Subject: [PATCH] Add new Cipher > Keyword Shifted Alphabet

---
 Ciphers/KeywordShiftedAlphabet.js | 79 ++++++++++++++++---------------
 1 file changed, 40 insertions(+), 39 deletions(-)

diff --git a/Ciphers/KeywordShiftedAlphabet.js b/Ciphers/KeywordShiftedAlphabet.js
index cd350b684..1322f1381 100644
--- a/Ciphers/KeywordShiftedAlphabet.js
+++ b/Ciphers/KeywordShiftedAlphabet.js
@@ -16,56 +16,57 @@
  * Non alphabetical characters (space, exclamation mark, ...) are kept as they are
  */
 
-const alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
+const alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
 
-function checkKeywordValidity(keyword) {
-	keyword.split('').forEach((char, index) => {
-		const rest = keyword.slice(0, index) + keyword.slice(index + 1);
-		if (rest.indexOf(char) !== -1) {
-			return false;
-		}
-	})
-	return true;
+function checkKeywordValidity (keyword) {
+  keyword.split('').forEach((char, index) => {
+    const rest = keyword.slice(0, index) + keyword.slice(index + 1)
+    if (rest.indexOf(char) !== -1) {
+      return false
+    }
+  })
+  return true
 }
 
-function getEncryptedAlphabet(keyword) {
-	const encryptedAlphabet = keyword.split('');
-	alphabet.forEach((char) => {
-		if (encryptedAlphabet.indexOf(char) === -1) {
-			encryptedAlphabet.push(char);
-		}
-	});
-	return encryptedAlphabet;
+function getEncryptedAlphabet (keyword) {
+  const encryptedAlphabet = keyword.split('')
+  alphabet.forEach((char) => {
+    if (encryptedAlphabet.indexOf(char) === -1) {
+      encryptedAlphabet.push(char)
+    }
+  })
+  return encryptedAlphabet
 }
 
-function translate(sourceAlphabet, targetAlphabet, message) {
-	return message.split('').reduce((encryptedMessage, char) => {
-		const isUpperCase = char === char.toUpperCase();
-		const encryptedCharIndex = sourceAlphabet.indexOf(char.toLowerCase());
-		const encryptedChar = encryptedCharIndex !== -1 ? targetAlphabet[encryptedCharIndex] : char
-		return encryptedMessage += isUpperCase ? encryptedChar.toUpperCase() : encryptedChar;
-	}, '');
+function translate (sourceAlphabet, targetAlphabet, message) {
+  return message.split('').reduce((encryptedMessage, char) => {
+    const isUpperCase = char === char.toUpperCase()
+    const encryptedCharIndex = sourceAlphabet.indexOf(char.toLowerCase())
+    const encryptedChar = encryptedCharIndex !== -1 ? targetAlphabet[encryptedCharIndex] : char
+    encryptedMessage += isUpperCase ? encryptedChar.toUpperCase() : encryptedChar
+    return encryptedMessage
+  }, '')
 }
 
-function checkInputs(keyword, message) {
-	if (!keyword || !message) {
-		throw new Error('Both keyword and message must be specified');
-	}
+function checkInputs (keyword, message) {
+  if (!keyword || !message) {
+    throw new Error('Both keyword and message must be specified')
+  }
 
-	if (!checkKeywordValidity(keyword)) {
-		throw new Error('Invalid keyword!')
-	}
+  if (!checkKeywordValidity(keyword)) {
+    throw new Error('Invalid keyword!')
+  }
 }
 
-function encrypt(keyword, message) {
-	checkInputs(keyword, message);
-	return translate(alphabet, getEncryptedAlphabet(keyword.toLowerCase()), message);
+function encrypt (keyword, message) {
+  checkInputs(keyword, message)
+  return translate(alphabet, getEncryptedAlphabet(keyword.toLowerCase()), message)
 }
 
-function decrypt(keyword, message) {
-	checkInputs(keyword, message);
-	return translate(getEncryptedAlphabet(keyword.toLowerCase()), alphabet, message);
+function decrypt (keyword, message) {
+  checkInputs(keyword, message)
+  return translate(getEncryptedAlphabet(keyword.toLowerCase()), alphabet, message)
 }
 
-console.log(encrypt('keyword', 'Hello world!')); // Prints 'Aoggj ujngw!'
-console.log(decrypt('keyword', 'Aoggj ujngw!')); // Prints 'Hello world!
\ No newline at end of file
+console.log(encrypt('keyword', 'Hello world!')) // Prints 'Aoggj ujngw!'
+console.log(decrypt('keyword', 'Aoggj ujngw!')) // Prints 'Hello world!