From d1889005577be004aeb4298128065ed5dd6a0615 Mon Sep 17 00:00:00 2001
From: zimmersandro <sandro.zimmermann@stud.fhgr.ch>
Date: Wed, 4 Mar 2026 23:04:55 +0100
Subject: [PATCH] chore: renamed cipher_helper.py in vigenere_chpher_helper.
 Next kata will be ceasar_cipher_helper

---
 ...elper.py => kata_vigenere_cipher_helper.py |  0
 src/codewars/kata_vigenere_cipher_helper.py   | 40 +++++++++++++++++++
 ...lper.py => test_vigenere_cipher_helper.py} |  0
 3 files changed, 40 insertions(+)
 rename src/codewars/kata_cipher_helper.py => kata_vigenere_cipher_helper.py (100%)
 create mode 100644 src/codewars/kata_vigenere_cipher_helper.py
 rename tests/codewars/{test_cipher_helper.py => test_vigenere_cipher_helper.py} (100%)

diff --git a/src/codewars/kata_cipher_helper.py b/kata_vigenere_cipher_helper.py
similarity index 100%
rename from src/codewars/kata_cipher_helper.py
rename to kata_vigenere_cipher_helper.py
diff --git a/src/codewars/kata_vigenere_cipher_helper.py b/src/codewars/kata_vigenere_cipher_helper.py
new file mode 100644
index 0000000..3d53b5d
--- /dev/null
+++ b/src/codewars/kata_vigenere_cipher_helper.py
@@ -0,0 +1,40 @@
+class VigenereCipher(object):
+    def __init__(self, key, alphabet):
+        self.key = key
+        self.alphabet = alphabet
+
+    def encode(self, text):
+        encoded = []
+        idx_key = 0
+
+        for char in text:
+            if char in self.alphabet:
+                text_pos = self.alphabet.index(char)
+                key_char = self.key[idx_key % len(self.key)]
+                key_pos = self.alphabet.index(key_char)
+
+                pos = (text_pos + key_pos) % len(self.alphabet)
+                encoded.append(self.alphabet[pos])
+            else:
+                encoded.append(char)
+            idx_key += 1
+
+        return "".join(encoded)
+
+    def decode(self, text):
+        decoded = []
+        idx_key = 0
+
+        for char in text:
+            if char in self.alphabet:
+                text_pos = self.alphabet.index(char)
+                key_char = self.key[idx_key % len(self.key)]
+                key_pos = self.alphabet.index(key_char)
+
+                pos = (text_pos - key_pos) % len(self.alphabet)
+                decoded.append(self.alphabet[pos])
+            else:
+                decoded.append(char)
+            idx_key += 1
+
+        return "".join(decoded)
diff --git a/tests/codewars/test_cipher_helper.py b/tests/codewars/test_vigenere_cipher_helper.py
similarity index 100%
rename from tests/codewars/test_cipher_helper.py
rename to tests/codewars/test_vigenere_cipher_helper.py