Change user input and fix encoding issue

main.py

@@ -1,5 +1,9 @@
+import sys
+
+
 def encode(m):
-    message = format(int.from_bytes(m.encode("latin-1"), "big"), "b")
+    m = bytearray(m, "ascii")
+    message = format(int.from_bytes(m, "big"), "b")
     generator = "10001000000100001"
     gen_deg = len(generator)
 
@@ -28,14 +32,51 @@ def encode(m):
                 while len(chunk) % 8 != 0:
                     chunk = "0" + chunk
 
-                return m + chr(int(chunk[:8], 2)) + chr(int(chunk[8:], 2))
+                fb = str(hex(int(chunk[:8], 2)))[2:]
+
+                if len(fb) == 1:
+                    fb = "0" + fb
+
+                sb = str(hex(int(chunk[8:], 2)))[2:]
+
+                if len(sb) == 1:
+                    sb = "0" + sb
+
+                m += b"\\x" + bytes(fb, "ascii")
+                m += b"\\x" + bytes(sb, "ascii")
+                return m
 
             remainder = format(int(chunk, 2) ^ int(generator, 2), "b")
             message = remainder + message[gen_deg:]
 
 
 def decode(n):
-    message = format(int.from_bytes(n.encode("latin-1"), "big"), "b")
+
+    fb = n[-7:-5]
+    sb = n[-2:]
+    msg = n[:-10]
+    message = ""
+
+    for ch in msg:
+
+        ch = bin(ord(ch))[2:]
+
+        while len(ch) < 8:
+            ch = "0" + ch
+
+        message += str(ch)
+
+    fb = bin(int(fb, 16))[2:]
+
+    while len(fb) < 8:
+        fb = "0" + fb
+
+    sb = bin(int(sb, 16))[2:]
+
+    while len(sb) < 8:
+        sb = "0" + sb
+
+    message += fb + sb
     generator = "10001000000100001"
     gen_deg = len(generator)
 
@@ -69,17 +110,19 @@ def decode(n):
 
 
 if __name__ == "__main__":
-    choice = ""
-    while choice != "3":
 
-        choice = input("1. Utwórz FCS\n2. Sprawdź FCS\n3. Wyjdź\n")
-
-        if choice == "1":
-            inp = input("Wprowadź wiadomość:\n")
-            print(encode(inp))
-
-        elif choice == "2":
-            inp = input("Wprowadź wiadomość z ramką:\n")
-            print(decode(inp))
+    if len(sys.argv) < 2:
+        print("Proszę wprowadzić jedną z flag:\n")
+        print("  -e, --encode\tZakoduj <wiadomość>")
+        print("  -d, --decode\tDekoduj <wiadomość_z_ramką>")
+        print("Przykład:")
+        print("python main.py -e abc")
+        print("python main.py -d abc\\\\x51\\\\x4a")
+    else:
+        if sys.argv[1] == "-e" or sys.argv[1] == "--encode":
+            print(encode(sys.argv[2]))
+        elif sys.argv[1] == "-d" or sys.argv[1] == "--decode":
+            print(decode(sys.argv[2]))
+