implement really hacky way of decoding b64 parts

gpgmymail

@@ -65,13 +65,36 @@ def decode_email(message: email.message.Message) -> email.message.Message:
     decoded_bytes = quopri.decodestring(decoded_bytes)
 
     # replace any instances of the Content-Transfer-Encoding header
+    # quopri version, we do base64 version down there
     decoded_bytes = decoded_bytes.replace(
         b'Content-Transfer-Encoding: quoted-printable',
         b'Content-Transfer-Encoding: 7bit'
     )
 
-    # TODO: base64 decoding, which is more difficult due to the need to not
+    # REALLY hacky but i had issues with the more sensible ways to do this.
-    # treat the whole email like it's base64
+    # iterates through a Message object to find CTEs of base64
+    # gets the b64 payload and the decoded payload
+    # then find and replaces in decoded_bytes the b64 payload
+    # with the decoded payload
+    # lol
+    quopri_decoded_message = email.message_from_bytes(decoded_bytes)
+    if quopri_decoded_message.is_multipart():
+        for part in quopri_decoded_message.walk():
+            if not part.is_multipart():
+                if part.get("Content-Transfer-Encoding") == "base64":
+                    b64_str = part.get_payload()
+                    decoded_b64_str = part.get_payload(decode=True)
+                    decoded_bytes = decoded_bytes.replace(
+                        b64_str,
+                        decoded_b64_str
+                    )
+    else:
+        # TODO
+
+    decoded_bytes = decoded_bytes.replace(
+        b'Content-Transfer-Encoding: base64',
+        b'Content-Transfer-Encoding: 7bit'
+    )
 
     return email.message_from_bytes(decoded_bytes)