README.md

@@ -1,10 +1,14 @@
-# Assignment 3 - Adam & Eve Subclasses
+# Assignment 2 - Caesar Cipher
 
-This is my code for the Task 3 assignment using inheritance.
+This is my code for the OOP homework. I chose the Caesar Cipher Helper.
 
-- **Link:** https://www.codewars.com/kata/547274e24481cfc469000416
+- **Link:** https://www.codewars.com/kata/526d42b6526963598d0004db
 
 ### How it works:
-- I created a base class called `Human`.
-- `Man` and `Woman` are subclasses that inherit everything from `Human`.
-- The `God` function creates and returns an array with the first man and woman.
+- The `CaesarCipher` class takes a `shift` number.
+- `encode` changes text to uppercase and moves letters forward. It uses `% 26` so letters stay in the A-Z alphabet.
+- `decode` moves letters backward to fix the text.
+- Spaces and punctuation do not change.
+
+### Tools:
+I set up black and ruff with pre-commit hooks. They check and fix my code format before every commit.

src/oop_solution.py

@@ -1,12 +1,25 @@
-class Human:
+class CaesarCipher:
 
-    def __init__(self, name: str):
-        self.name = name
-class Man(Human):
-    pass
+    def __init__(self, shift: int):
+        self.shift = shift
+        self.alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
-class Woman(Human):
-    pass
+    def encode(self, st: str) -> str:
+        result = []
+        for char in st.upper():
+            if char in self.alphabet:
+                new_index = (self.alphabet.index(char) + self.shift) % 26
+                result.append(self.alphabet[new_index])
+            else:
+                result.append(char)
+        return "".join(result)
 
-def God():
-    return [Man("Adam"), Woman("Eve")]
+    def decode(self, st: str) -> str:
+        result = []
+        for char in st.upper():
+            if char in self.alphabet:
+                new_index = (self.alphabet.index(char) - self.shift) % 26
+                result.append(self.alphabet[new_index])
+            else:
+                result.append(char)
+        return "".join(result)