use message_from_string instead of message_from_bytes cause message_from_bytes bizarrely changes it back to base64

gpgmymail

@@ -60,6 +60,7 @@ def decode_email(message: email.message.Message) -> email.message.Message:
     # this is a kinda hacky way to do this by manipulating the message as a
     # string but i couldn't get it to work any other way
     # decoding needed:
+    # as_string() gives us str, encode() gives us bytes
     decoded_bytes = message.as_bytes()
     decoded_bytes = quopri.decodestring(decoded_bytes)
 
@@ -78,15 +79,26 @@ def decode_email(message: email.message.Message) -> email.message.Message:
     # lol
     quopri_decoded_message = email.message_from_bytes(decoded_bytes)
     if quopri_decoded_message.is_multipart():
+        most_recent_boundary = None
         for part in quopri_decoded_message.walk():
-            if not part.is_multipart():
+            # multipart and has boundary (not None)
+            if part.is_multipart() and part.get_boundary():
+                most_recent_boundary = part.get_boundary()
+            else:
                 if part.get("Content-Transfer-Encoding") == "base64":
-                    new_part = part
-                    new_part.replace_header("Content-Transfer-Encoding", "7bit")
-                    new_part.set_payload(part.get_payload(decode=True))
+                    b64_str = part.get_payload()
+                    # remove the boundary as we don't want to change this
+                    b64_str = b64_str.replace(most_recent_boundary, "")
+                    # sometimes we have leftover hyphens from a boundary, so strip:
+                    # hyphens not in base64 so we know not to use them
+                    # strip whitespace first
+                    b64_str = b64_str.strip()
+                    b64_str = b64_str.strip('-')
+                    b64_str = b64_str.encode()  # turn into bytes-like object
+                    decoded_b64_str = part.get_payload(decode=True)
                     decoded_bytes = decoded_bytes.replace(
-                        part.as_bytes(),
-                        new_part.as_bytes()
+                        b64_str,
+                        decoded_b64_str
                     )
     else:
         # TODO
@@ -96,8 +108,10 @@ def decode_email(message: email.message.Message) -> email.message.Message:
         b'Content-Transfer-Encoding: base64',
         b'Content-Transfer-Encoding: 7bit'
     )
-
-    return email.message_from_bytes(decoded_bytes)
+    
+    # if i do message_from_bytes it bizarrely changes it back to base64?
+    # utf-8 has encoding issues so do latin1
+    return email.message_from_string(decoded_bytes.decode("latin1"))
 
 def encrypt(
         message: email.message.Message,