Adds Morse Code

DIRECTORY.md

@@ -3,6 +3,7 @@
 ## Ciphers
   * [Caesarcipher](./ciphers/caesarCipher.php)
   * [Xorcipher](./ciphers/XORCipher.php)
+  * [Morse Code](./ciphers/morseCode.php)
 
 ## Conversions
   * [Binarytodecimal](./Conversions/BinaryToDecimal.php)

ciphers/morseCode.php

@@ -0,0 +1,119 @@
+<?php
+
+/**
+ * Encode text to Morse Code.
+ * @param string text to encode
+ */
+function encode(string $text): string
+{
+    $text = strtoupper($text); // Makes sure the string is uppercase
+    $MORSE_CODE = array( // Array containing morse code translations
+        "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" => "--..",
+        "1" => ".----",
+        "2" => "..---",
+        "3" => "...--",
+        "4" => "....-",
+        "5" => ".....",
+        "6" => "-....",
+        "7" => "--...",
+        "8" => "---..",
+        "9" => "----.",
+        "0" => "-----",
+        " " => "/"
+    );
+
+    $encodedText = ""; // Stores the encoded text
+    foreach (str_split($text) as $c) { // Going through each character
+        if (array_key_exists($c, $MORSE_CODE)) { // Checks if it is a valid character
+            $encodedText .= $MORSE_CODE[$c] . " "; // Appends the correct character
+        } else {
+            throw new \Exception("Invalid character: $c");
+        }
+    }
+    substr_replace($encodedText ,"", -1); // Removes trailing space
+    return $encodedText;
+}
+
+/**
+ * Decode Morse Code to text.
+ * @param string text to decode
+ */
+function decode(string $text): string
+{
+    $MORSE_CODE = array( // An array containing morse code to text translations
+        ".-" => "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",
+        ".----" => "1",
+        "..---" => "2",
+        "...--" => "3",
+        "....-" => "4",
+        "....." => "5",
+        "-...." => "6",
+        "--..." => "7",
+        "---.." => "8",
+        "----." => "9",
+        "-----" => "0",
+        "/" => " "
+    );
+    
+    $decodedText = ""; // Stores the decoded text
+    foreach (explode(" ", $text) as $c) { // Going through each group
+        if (array_key_exists($c, $MORSE_CODE)) { // Checks if it is a valid character
+            $decodedText .= $MORSE_CODE[$c]; // Appends the correct character
+        } else {
+            if ($c) { // Makes sure that the string is not empty to prevent trailing spaces or extra spaces from breaking this
+                throw new \Exception("Invalid character: $c");
+            }
+        }
+    }
+    return $decodedText;
+}

tests/MorseCodeTest.php

@@ -0,0 +1,15 @@
+<?php
+
+use function PHPUnit\Framework\assertEquals;
+use PHPUnit\Framework\TestCase;
+
+require_once __DIR__ . '/../vendor/autoload.php';
+require_once __DIR__ . '/../ciphers/morseCode.php';
+
+class CiphersTest extends TestCase
+{
+    public function testCaesarCipher()
+    {
+        assertEquals('Test 123', decrypt(encrypt('Test 123')));
+    }
+}