feat: finalize chiper_app project

Author: diardanoraihan

Reminder/2_functions/chiper_app/misc.py

@@ -1,37 +1,41 @@
 letters = ['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']
 
 def txtEncoder(message, shift):
+ message = message.lower()
  idx2encode = []
  for txt in message:
- idx2encode.append(letters.index(txt))
+ if txt in letters:
+ if letters.index(txt) + shift < 26:
+ idx2encode.append(letters.index(txt) + shift)
+ else:
+ idx2encode.append(letters.index(txt) + shift - 26)
+ else:
+ idx2encode.append(txt)
 
- final_indices = []
+ txtEncoded = ""
  for idx in idx2encode:
- if (idx + shift) < 26:
- new_idx = idx + shift
+ if isinstance(idx, int):
+ txtEncoded += letters[idx]
  else:
- new_idx = (idx + shift) - 26
- final_indices.append(new_idx)
+ txtEncoded += idx
 
- txtEncoded = ""
- for idx in final_indices:
- txtEncoded += letters[idx]
- 
  print(txtEncoded)
 
 def txtDecoder(message, shift):
+ message = message.lower()
  idx2decode = []
+
  for txt in message:
- idx2decode.append(letters.index(txt))
+ if txt in letters:
+ idx2decode.append(letters.index(txt) - shift)
+ else:
+ idx2decode.append(txt)
 
- final_indices = []
+ txtDecoded = ""
  for idx in idx2decode:
- new_idx = idx - shift
- final_indices.append(new_idx)
+ if isinstance(idx, int):
+ txtDecoded += letters[idx]
+ else:
+ txtDecoded += idx
 
- txtDecoded = ""
- for idx in final_indices:
- txtDecoded += letters[idx]
- 
- print(txtDecoded)
- 
+ print(txtDecoded)