From 297fdb763d2ef8c50474bf450fac4daa31f8588c Mon Sep 17 00:00:00 2001
From: IcarusTheFly <icarusthefly@users.noreply.github.com>
Date: Wed, 4 Oct 2023 01:01:44 +1100
Subject: [PATCH 1/2] Add Baconian Cipher
---
 Ciphers/BaconianCipher.js &#124; 101 ++++++++++++++++++++++++++++
 Ciphers/test/BaconianCipher.test.js &#124; 17 +++++
 2 files changed, 118 insertions(+)
 create mode 100644 Ciphers/BaconianCipher.js
 create mode 100644 Ciphers/test/BaconianCipher.test.js
diff --git a/Ciphers/BaconianCipher.js b/Ciphers/BaconianCipher.js
new file mode 100644
index 0000000000..b4cde5e045
--- /dev/null
+++ b/Ciphers/BaconianCipher.js
@@ -0,0 +1,101 @@
+/**
+ * In cryptography, Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605.
+ * See [wiki](https://en.wikipedia.org/wiki/Bacon%27s_cipher)
+ */
+
+const baconianAlphabet = {
+ A: 'AAAAA',
+ B: 'AAAAB',
+ C: 'AAABA',
+ D: 'AAABB',
+ E: 'AABAA',
+ F: 'AABAB',
+ G: 'AABBA',
+ H: 'AABBB',
+ I: 'ABAAA',
+ J: 'ABAAB',
+ K: 'ABABA',
+ L: 'ABABB',
+ M: 'ABBAA',
+ N: 'ABBAB',
+ O: 'ABBBA',
+ P: 'ABBBB',
+ Q: 'BAAAA',
+ R: 'BAAAB',
+ S: 'BAABA',
+ T: 'BAABB',
+ U: 'BABAA',
+ V: 'BABAB',
+ W: 'BABBA',
+ X: 'BABBB',
+ Y: 'BBAAA',
+ Z: 'BBAAB',
+ ' ': ' '
+}
+
+/**
+ * @function baconianEncode
+ * @description - Encodes a message using baconian cipher
+ * @param {string} message - Message to encode
+ * @return {string} A string with the encoded message
+ */
+const baconianEncode = (message) => {
+ if (typeof message !== 'string') {
+ throw new TypeError('The message must be a string')
+ }
+
+ message = message.toUpperCase()
+
+ let result = ''
+
+ message.split('').forEach((char) => {
+ result += baconianAlphabet[char]
+ })
+
+ return result
+}
+
+/**
+ * @function baconianDecode
+ * @description - Decoded a message encoded using baconian cipher
+ * @param {string} message - Message to decode
+ * @return {string} A string with the decoded message
+ */
+const baconianDecode = (message) => {
+ if (typeof message !== 'string') {
+ throw new TypeError('The encoded message must be a string')
+ }
+
+ if (!/^[AB ]+$/.test(message)) {
+ throw new TypeError('The encoded message should consist only of "A"s, "B"s and whitespaces')
+ }
+
+ message = message.toUpperCase()
+
+ let result = ''
+ const messageArray = message.split(' ')
+
+ messageArray.forEach((word, index) => {
+ for (let i = 0; i < word.length; i += 5) { + const letter = Object.keys(baconianAlphabet).find( + (key) => {
+ return baconianAlphabet[key] === word.substring(i, i + 5)
+ }
+ )
+
+ if (letter) {
+ result += letter
+ }
+ }
+ if (index < messageArray.length - 1) { + result += ' ' + } + }) + + return result +} + +export { + baconianEncode, + baconianDecode +} diff --git a/Ciphers/test/BaconianCipher.test.js b/Ciphers/test/BaconianCipher.test.js new file mode 100644 index 0000000000..645a1b756e --- /dev/null +++ b/Ciphers/test/BaconianCipher.test.js @@ -0,0 +1,17 @@ +import { + baconianEncode, + baconianDecode +} from '../BaconianCipher' + +test('"Hello world" === baconianDecode(baconianEncode("Hello world"))', () => {
+ const word = 'Hello world'
+ const expectedResult = 'HELLO WORLD'
+ const result = baconianDecode(baconianEncode(word))
+ expect(result).toMatch(expectedResult)
+})
+
+test('"AABBBAABAAABABBABABBABBBA BABBAABBBABAAABABABBAAABB" === baconianEncode(baconianDecode("AABBBAABAAABABBABABBABBBA BABBAABBBABAAABABABBAAABB"))', () => {
+ const word = 'AABBBAABAAABABBABABBABBBA BABBAABBBABAAABABABBAAABB'
+ const result = baconianEncode(baconianDecode(word))
+ expect(result).toMatch(word)
+})
From 470949fbeff104d3c1da41802392e47984be05d6 Mon Sep 17 00:00:00 2001
From: github-actions <${github_actor}@users.noreply.github.com>
Date: Tue, 3 Oct 2023 14:02:59 +0000
Subject: [PATCH 2/2] Updated Documentation in README.md
---
 DIRECTORY.md &#124; 3 +++
 1 file changed, 3 insertions(+)
diff --git a/DIRECTORY.md b/DIRECTORY.md
index 2d70c5d6a2..f648068452 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -25,6 +25,7 @@
 * **Ciphers**
 * [AffineCipher](Ciphers/AffineCipher.js)
 * [Atbash](Ciphers/Atbash.js)
+ * [BaconianCipher](Ciphers/BaconianCipher.js)
 * [CaesarCipher](Ciphers/CaesarCipher.js)
 * [KeyFinder](Ciphers/KeyFinder.js)
 * [KeywordShiftedAlphabet](Ciphers/KeywordShiftedAlphabet.js)
@@ -47,6 +48,7 @@
 * [HexToBinary](Conversions/HexToBinary.js)
 * [HexToDecimal](Conversions/HexToDecimal.js)
 * [HexToRGB](Conversions/HexToRGB.js)
+ * [LengthConversion](Conversions/LengthConversion.js)
 * [LitersToImperialGallons](Conversions/LitersToImperialGallons.js)
 * [LitersToUSGallons](Conversions/LitersToUSGallons.js)
 * [LowerCaseConversion](Conversions/LowerCaseConversion.js)
@@ -233,6 +235,7 @@
 * [PowLogarithmic](Maths/PowLogarithmic.js)
 * [PrimeCheck](Maths/PrimeCheck.js)
 * [PrimeFactors](Maths/PrimeFactors.js)
+ * [QuadraticRoots](Maths/QuadraticRoots.js)
 * [RadianToDegree](Maths/RadianToDegree.js)
 * [ReverseNumber](Maths/ReverseNumber.js)
 * [ReversePolishNotation](Maths/ReversePolishNotation.js)
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